[WIP/PATCH v5 0/10] create ref-filter from for-each-ref

[WIP/PATCH v5 0/10] create ref-filter from for-each-ref

[Karthik Nayak]

Version for of this patch can be found here :
http://www.mail-archive.com/git@vger.kernel.org/msg70280.html

Changes in this version:
*	Rename functions to better suit the code.
*	implement filter_refs()
*	use FLEX_ARRAY for refname
*	other small changes
-- 
Regards,
Karthik

[WIP/PATCH v5 01/10] for-each-ref: extract helper functions out of grab_single_ref()

[Karthik Nayak]

Extract two helper functions out of grab_single_ref(). Firstly,
new_refinfo() which is used to allocate memory for a new refinfo
structure and copy the objectname, refname and flag to it.
Secondly, match_name_as_path() which when given an array of patterns
and the refname checks if the refname matches any of the patterns
given while the pattern is a pathname, also while supporting wild
characters.

This is a preperatory patch for restructuring 'for-each-ref' and
eventually moving most of it to 'ref-filter' to provide the
functionality to similar commands via public API's.

Helped-by: Junio C Hamano <gitster@pobox.com>
Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 builtin/for-each-ref.c | 63 ++++++++++++++++++++++++++++++++------------------
 1 file changed, 40 insertions(+), 23 deletions(-)

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index 83f9cf9..48da5a4 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -837,6 +837,43 @@ struct grab_ref_cbdata {
 };
 
 /*
+ * Given a refname, return 1 if the refname matches with one of the patterns
+ * while the pattern is a pathname like 'refs/tags' or 'refs/heads/master'
+ * and so on, else return 0. Supports use of wild characters.
+ */
+static int match_name_as_path(const char **pattern, const char *refname)
+{
+	int namelen = strlen(refname);
+	for (; *pattern; pattern++) {
+		const char *p = *pattern;
+		int plen = strlen(p);
+
+		if ((plen <= namelen) &&
+		    !strncmp(refname, p, plen) &&
+		    (refname[plen] == '\0' ||
+		     refname[plen] == '/' ||
+		     p[plen-1] == '/'))
+			return 1;
+		if (!wildmatch(p, refname, WM_PATHNAME, NULL))
+			return 1;
+	}
+	return 0;
+}
+
+/* Allocate space for a new refinfo and copy the objectname and flag to it */
+static struct refinfo *new_refinfo(const char *refname,
+				   const unsigned char *objectname,
+				   int flag)
+{
+	struct refinfo *ref = xcalloc(1, sizeof(struct refinfo));
+	ref->refname = xstrdup(refname);
+	hashcpy(ref->objectname, objectname);
+	ref->flag = flag;
+
+	return ref;
+}
+
+/*
  * A call-back given to for_each_ref().  Filter refs and keep them for
  * later object processing.
  */
@@ -851,35 +888,15 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
 		  return 0;
 	}
 
-	if (*cb->grab_pattern) {
-		const char **pattern;
-		int namelen = strlen(refname);
-		for (pattern = cb->grab_pattern; *pattern; pattern++) {
-			const char *p = *pattern;
-			int plen = strlen(p);
-
-			if ((plen <= namelen) &&
-			    !strncmp(refname, p, plen) &&
-			    (refname[plen] == '\0' ||
-			     refname[plen] == '/' ||
-			     p[plen-1] == '/'))
-				break;
-			if (!wildmatch(p, refname, WM_PATHNAME, NULL))
-				break;
-		}
-		if (!*pattern)
-			return 0;
-	}
+	if (*cb->grab_pattern && !match_name_as_path(cb->grab_pattern, refname))
+		return 0;
 
 	/*
 	 * We do not open the object yet; sort may only need refname
 	 * to do its job and the resulting list may yet to be pruned
 	 * by maxcount logic.
 	 */
-	ref = xcalloc(1, sizeof(*ref));
-	ref->refname = xstrdup(refname);
-	hashcpy(ref->objectname, sha1);
-	ref->flag = flag;
+	ref = new_refinfo(refname, sha1, flag);
 
 	cnt = cb->grab_cnt;
 	REALLOC_ARRAY(cb->grab_array, cnt + 1);
-- 
2.4.2

[WIP/PATCH v5 02/10] for-each-ref: clean up code

[Karthik Nayak]

In 'grab_single_ref()' remove the extra count variable 'cnt' and
use the variable 'grab_cnt' of structure 'grab_ref_cbdata' directly
instead.

Change comment in 'struct ref_sort' to reflect changes in code.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 builtin/for-each-ref.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index 48da5a4..0ca9836 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -27,7 +27,7 @@ struct atom_value {
 
 struct ref_sort {
 	struct ref_sort *next;
-	int atom; /* index into used_atom array */
+	int atom; /* index into 'struct atom_value *' array */
 	unsigned reverse : 1;
 };
 
@@ -881,7 +881,6 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
 {
 	struct grab_ref_cbdata *cb = cb_data;
 	struct refinfo *ref;
-	int cnt;
 
 	if (flag & REF_BAD_NAME) {
 		  warning("ignoring ref with broken name %s", refname);
@@ -898,10 +897,8 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
 	 */
 	ref = new_refinfo(refname, sha1, flag);
 
-	cnt = cb->grab_cnt;
-	REALLOC_ARRAY(cb->grab_array, cnt + 1);
-	cb->grab_array[cnt++] = ref;
-	cb->grab_cnt = cnt;
+	REALLOC_ARRAY(cb->grab_array, cb->grab_cnt + 1);
+	cb->grab_array[cb->grab_cnt++] = ref;
 	return 0;
 }
 
-- 
2.4.2

Re: [WIP/PATCH v5 02/10] for-each-ref: clean up code

[Matthieu Moy]

Karthik Nayak <karthik.188@gmail.com> writes:

> In 'grab_single_ref()' remove the extra count variable 'cnt' and
> use the variable 'grab_cnt' of structure 'grab_ref_cbdata' directly
> instead.
>
> Change comment in 'struct ref_sort' to reflect changes in code.

I don't see how the comment change is related to the code change:

>  struct ref_sort {
>  	struct ref_sort *next;
> -	int atom; /* index into used_atom array */
> +	int atom; /* index into 'struct atom_value *' array */
>  	unsigned reverse : 1;
>  };
>  
> @@ -881,7 +881,6 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
>  {
>  	struct grab_ref_cbdata *cb = cb_data;
>  	struct refinfo *ref;
> -	int cnt;
>  
>  	if (flag & REF_BAD_NAME) {
>  		  warning("ignoring ref with broken name %s", refname);
> @@ -898,10 +897,8 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
>  	 */
>  	ref = new_refinfo(refname, sha1, flag);
>  
> -	cnt = cb->grab_cnt;
> -	REALLOC_ARRAY(cb->grab_array, cnt + 1);
> -	cb->grab_array[cnt++] = ref;
> -	cb->grab_cnt = cnt;
> +	REALLOC_ARRAY(cb->grab_array, cb->grab_cnt + 1);
> +	cb->grab_array[cb->grab_cnt++] = ref;
>  	return 0;
>  }

Did you squash the comment change into the wrong commit?

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/

Re: [WIP/PATCH v5 02/10] for-each-ref: clean up code

[Karthik Nayak]

On 06/08/2015 08:07 PM, Matthieu Moy wrote:
> Karthik Nayak <karthik.188@gmail.com> writes:
>
>> In 'grab_single_ref()' remove the extra count variable 'cnt' and
>> use the variable 'grab_cnt' of structure 'grab_ref_cbdata' directly
>> instead.
>>
>> Change comment in 'struct ref_sort' to reflect changes in code.
>
> I don't see how the comment change is related to the code change:
>
>>   struct ref_sort {
>>   	struct ref_sort *next;
>> -	int atom; /* index into used_atom array */
>> +	int atom; /* index into 'struct atom_value *' array */
>>   	unsigned reverse : 1;
>>   };
>>
>> @@ -881,7 +881,6 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
>>   {
>>   	struct grab_ref_cbdata *cb = cb_data;
>>   	struct refinfo *ref;
>> -	int cnt;
>>
>>   	if (flag & REF_BAD_NAME) {
>>   		  warning("ignoring ref with broken name %s", refname);
>> @@ -898,10 +897,8 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
>>   	 */
>>   	ref = new_refinfo(refname, sha1, flag);
>>
>> -	cnt = cb->grab_cnt;
>> -	REALLOC_ARRAY(cb->grab_array, cnt + 1);
>> -	cb->grab_array[cnt++] = ref;
>> -	cb->grab_cnt = cnt;
>> +	REALLOC_ARRAY(cb->grab_array, cb->grab_cnt + 1);
>> +	cb->grab_array[cb->grab_cnt++] = ref;
>>   	return 0;
>>   }
>
> Did you squash the comment change into the wrong commit?
>

What I meant was, change the comment to reflect changes in code since 
the comment was made, not relevant to the simplification of code.

I put these two together as they are trivial changes.
Either I could reword the commit message or split the commit.

-- 
Regards,
Karthik

Re: [WIP/PATCH v5 02/10] for-each-ref: clean up code

[Matthieu Moy]

Karthik Nayak <karthik.188@gmail.com> writes:

> I put these two together as they are trivial changes.
> Either I could reword the commit message or split the commit.

I'd split the commit. Actually, even though it's only a small comment
change, it's not so "trivial" in the sense that one needs a good
understanding of the code to check the correctness of your patch.

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/

[WIP/PATCH v5 03/10] for-each-ref: rename 'refinfo' to 'ref_array_item'

[Karthik Nayak]

Rename 'refinfo' to 'ref_array_item' as a preparatory step for
introduction of new structures in the forthcoming patch.

Re-order the fields in 'ref_array_item' so that refname can be
eventually converted to a FLEX_ARRAY.

Make 'symref' a non const char pointer, so that the compiler doesn't
throw an error when we try to free the memory allocated to it.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 builtin/for-each-ref.c | 42 +++++++++++++++++++++---------------------
 1 file changed, 21 insertions(+), 21 deletions(-)

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index 0ca9836..b8d17b6 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -31,12 +31,12 @@ struct ref_sort {
 	unsigned reverse : 1;
 };
 
-struct refinfo {
-	char *refname;
+struct ref_array_item {
 	unsigned char objectname[20];
 	int flag;
-	const char *symref;
+	char *symref;
 	struct atom_value *value;
+	char *refname;
 };
 
 static struct {
@@ -85,7 +85,7 @@ static struct {
  * a "*" to denote deref_tag().
  *
  * We parse given format string and sort specifiers, and make a list
- * of properties that we need to extract out of objects.  refinfo
+ * of properties that we need to extract out of objects.  ref_array_item
  * structure will hold an array of values extracted that can be
  * indexed with the "atom number", which is an index into this
  * array.
@@ -622,7 +622,7 @@ static inline char *copy_advance(char *dst, const char *src)
 /*
  * Parse the object referred by ref, and grab needed value.
  */
-static void populate_value(struct refinfo *ref)
+static void populate_value(struct ref_array_item *ref)
 {
 	void *buf;
 	struct object *obj;
@@ -821,7 +821,7 @@ static void populate_value(struct refinfo *ref)
  * Given a ref, return the value for the atom.  This lazily gets value
  * out of the object by calling populate value.
  */
-static void get_value(struct refinfo *ref, int atom, struct atom_value **v)
+static void get_value(struct ref_array_item *ref, int atom, struct atom_value **v)
 {
 	if (!ref->value) {
 		populate_value(ref);
@@ -831,7 +831,7 @@ static void get_value(struct refinfo *ref, int atom, struct atom_value **v)
 }
 
 struct grab_ref_cbdata {
-	struct refinfo **grab_array;
+	struct ref_array_item **grab_array;
 	const char **grab_pattern;
 	int grab_cnt;
 };
@@ -860,12 +860,12 @@ static int match_name_as_path(const char **pattern, const char *refname)
 	return 0;
 }
 
-/* Allocate space for a new refinfo and copy the objectname and flag to it */
-static struct refinfo *new_refinfo(const char *refname,
-				   const unsigned char *objectname,
-				   int flag)
+/* Allocate space for a new ref_array_item and copy the objectname and flag to it */
+static struct ref_array_item *new_ref_array_item(const char *refname,
+						 const unsigned char *objectname,
+						 int flag)
 {
-	struct refinfo *ref = xcalloc(1, sizeof(struct refinfo));
+	struct ref_array_item *ref = xcalloc(1, sizeof(struct ref_array_item));
 	ref->refname = xstrdup(refname);
 	hashcpy(ref->objectname, objectname);
 	ref->flag = flag;
@@ -880,7 +880,7 @@ static struct refinfo *new_refinfo(const char *refname,
 static int grab_single_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 {
 	struct grab_ref_cbdata *cb = cb_data;
-	struct refinfo *ref;
+	struct ref_array_item *ref;
 
 	if (flag & REF_BAD_NAME) {
 		  warning("ignoring ref with broken name %s", refname);
@@ -895,14 +895,14 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
 	 * to do its job and the resulting list may yet to be pruned
 	 * by maxcount logic.
 	 */
-	ref = new_refinfo(refname, sha1, flag);
+	ref = new_ref_array_item(refname, sha1, flag);
 
 	REALLOC_ARRAY(cb->grab_array, cb->grab_cnt + 1);
 	cb->grab_array[cb->grab_cnt++] = ref;
 	return 0;
 }
 
-static int cmp_ref_sort(struct ref_sort *s, struct refinfo *a, struct refinfo *b)
+static int cmp_ref_sort(struct ref_sort *s, struct ref_array_item *a, struct ref_array_item *b)
 {
 	struct atom_value *va, *vb;
 	int cmp;
@@ -929,8 +929,8 @@ static int cmp_ref_sort(struct ref_sort *s, struct refinfo *a, struct refinfo *b
 static struct ref_sort *ref_sort;
 static int compare_refs(const void *a_, const void *b_)
 {
-	struct refinfo *a = *((struct refinfo **)a_);
-	struct refinfo *b = *((struct refinfo **)b_);
+	struct ref_array_item *a = *((struct ref_array_item **)a_);
+	struct ref_array_item *b = *((struct ref_array_item **)b_);
 	struct ref_sort *s;
 
 	for (s = ref_sort; s; s = s->next) {
@@ -941,10 +941,10 @@ static int compare_refs(const void *a_, const void *b_)
 	return 0;
 }
 
-static void sort_refs(struct ref_sort *sort, struct refinfo **refs, int num_refs)
+static void sort_refs(struct ref_sort *sort, struct ref_array_item **refs, int num_refs)
 {
 	ref_sort = sort;
-	qsort(refs, num_refs, sizeof(struct refinfo *), compare_refs);
+	qsort(refs, num_refs, sizeof(struct ref_array_item *), compare_refs);
 }
 
 static void print_value(struct atom_value *v, int quote_style)
@@ -1011,7 +1011,7 @@ static void emit(const char *cp, const char *ep)
 	}
 }
 
-static void show_ref(struct refinfo *info, const char *format, int quote_style)
+static void show_ref(struct ref_array_item *info, const char *format, int quote_style)
 {
 	const char *cp, *sp, *ep;
 
@@ -1084,7 +1084,7 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 	const char *format = "%(objectname) %(objecttype)\t%(refname)";
 	struct ref_sort *sort = NULL, **sort_tail = &sort;
 	int maxcount = 0, quote_style = 0;
-	struct refinfo **refs;
+	struct ref_array_item **refs;
 	struct grab_ref_cbdata cbdata;
 
 	struct option opts[] = {
-- 
2.4.2

Re: [WIP/PATCH v5 03/10] for-each-ref: rename 'refinfo' to 'ref_array_item'

[Matthieu Moy]

Karthik Nayak <karthik.188@gmail.com> writes:

> Make 'symref' a non const char pointer, so that the compiler doesn't
> throw an error when we try to free the memory allocated to it.

Casting to non-cost when calling free() is a common pattern. I think it
would make more sense to cast at free() time and keep the member const.

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/

Re: [WIP/PATCH v5 03/10] for-each-ref: rename 'refinfo' to 'ref_array_item'

[Karthik Nayak]

On 06/08/2015 08:12 PM, Matthieu Moy wrote:
> Karthik Nayak <karthik.188@gmail.com> writes:
>
>> Make 'symref' a non const char pointer, so that the compiler doesn't
>> throw an error when we try to free the memory allocated to it.
>
> Casting to non-cost when calling free() is a common pattern. I think it
> would make more sense to cast at free() time and keep the member const.
>

Ok! will do that. thanks :)

-- 
Regards,
Karthik

[WIP/PATCH v5 04/10] for-each-ref: introduce new structures for better organisation

[Karthik Nayak]

Introduce 'ref_filter_cbdata' which will hold 'ref_filter'
(conditions to filter the refs on) and 'ref_array' (the array
of ref_array_items). Modify the code to use these new structures.

This is a preparatory patch to eventually move code from 'for-each-ref'
to 'ref-filter' and make it publicly available.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 builtin/for-each-ref.c | 54 ++++++++++++++++++++++++++++----------------------
 1 file changed, 30 insertions(+), 24 deletions(-)

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index b8d17b6..169ccc8 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -39,6 +39,20 @@ struct ref_array_item {
 	char *refname;
 };
 
+struct ref_array {
+	int nr, alloc;
+	struct ref_array_item **items;
+};
+
+struct ref_filter {
+	const char **name_patterns;
+};
+
+struct ref_filter_cbdata {
+	struct ref_array array;
+	struct ref_filter filter;
+};
+
 static struct {
 	const char *name;
 	cmp_type cmp_type;
@@ -830,12 +844,6 @@ static void get_value(struct ref_array_item *ref, int atom, struct atom_value **
 	*v = &ref->value[atom];
 }
 
-struct grab_ref_cbdata {
-	struct ref_array_item **grab_array;
-	const char **grab_pattern;
-	int grab_cnt;
-};
-
 /*
  * Given a refname, return 1 if the refname matches with one of the patterns
  * while the pattern is a pathname like 'refs/tags' or 'refs/heads/master'
@@ -879,7 +887,8 @@ static struct ref_array_item *new_ref_array_item(const char *refname,
  */
 static int grab_single_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 {
-	struct grab_ref_cbdata *cb = cb_data;
+	struct ref_filter_cbdata *ref_cbdata = cb_data;
+	struct ref_filter *filter = &ref_cbdata->filter;
 	struct ref_array_item *ref;
 
 	if (flag & REF_BAD_NAME) {
@@ -887,7 +896,7 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
 		  return 0;
 	}
 
-	if (*cb->grab_pattern && !match_name_as_path(cb->grab_pattern, refname))
+	if (*filter->name_patterns && !match_name_as_path(filter->name_patterns, refname))
 		return 0;
 
 	/*
@@ -897,8 +906,8 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
 	 */
 	ref = new_ref_array_item(refname, sha1, flag);
 
-	REALLOC_ARRAY(cb->grab_array, cb->grab_cnt + 1);
-	cb->grab_array[cb->grab_cnt++] = ref;
+	REALLOC_ARRAY(ref_cbdata->array.items, ref_cbdata->array.nr + 1);
+	ref_cbdata->array.items[ref_cbdata->array.nr++] = ref;
 	return 0;
 }
 
@@ -941,10 +950,10 @@ static int compare_refs(const void *a_, const void *b_)
 	return 0;
 }
 
-static void sort_refs(struct ref_sort *sort, struct ref_array_item **refs, int num_refs)
+static void sort_refs(struct ref_sort *sort, struct ref_array *array)
 {
 	ref_sort = sort;
-	qsort(refs, num_refs, sizeof(struct ref_array_item *), compare_refs);
+	qsort(array->items, array->nr, sizeof(struct ref_array_item *), compare_refs);
 }
 
 static void print_value(struct atom_value *v, int quote_style)
@@ -1080,12 +1089,11 @@ static char const * const for_each_ref_usage[] = {
 
 int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 {
-	int i, num_refs;
+	int i;
 	const char *format = "%(objectname) %(objecttype)\t%(refname)";
 	struct ref_sort *sort = NULL, **sort_tail = &sort;
 	int maxcount = 0, quote_style = 0;
-	struct ref_array_item **refs;
-	struct grab_ref_cbdata cbdata;
+	struct ref_filter_cbdata ref_cbdata;
 
 	struct option opts[] = {
 		OPT_BIT('s', "shell", &quote_style,
@@ -1123,17 +1131,15 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 	/* for warn_ambiguous_refs */
 	git_config(git_default_config, NULL);
 
-	memset(&cbdata, 0, sizeof(cbdata));
-	cbdata.grab_pattern = argv;
-	for_each_rawref(grab_single_ref, &cbdata);
-	refs = cbdata.grab_array;
-	num_refs = cbdata.grab_cnt;
+	memset(&ref_cbdata, 0, sizeof(ref_cbdata));
+	ref_cbdata.filter.name_patterns = argv;
+	for_each_rawref(grab_single_ref, &ref_cbdata);
 
-	sort_refs(sort, refs, num_refs);
+	sort_refs(sort, &ref_cbdata.array);
 
-	if (!maxcount || num_refs < maxcount)
-		maxcount = num_refs;
+	if (!maxcount || ref_cbdata.array.nr < maxcount)
+		maxcount = ref_cbdata.array.nr;
 	for (i = 0; i < maxcount; i++)
-		show_ref(refs[i], format, quote_style);
+		show_ref(ref_cbdata.array.items[i], format, quote_style);
 	return 0;
 }
-- 
2.4.2

[WIP/PATCH v5 05/10] for-each-ref: introduce 'ref_array_clear()'

[Karthik Nayak]

Introduce and implement 'ref_array_clear()' which will free
all allocated memory for 'ref_array'.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 builtin/for-each-ref.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index 169ccc8..54f03c9 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -911,6 +911,26 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
 	return 0;
 }
 
+/*  Free memory allocated for a ref_array_item */
+static void free_array_item(struct ref_array_item *item)
+{
+	free(item->symref);
+	free(item->refname);
+	free(item);
+}
+
+/* Free all memory allocated for ref_array */
+void ref_array_clear(struct ref_array *array)
+{
+	int i;
+
+	for (i = 0; i < array->nr; i++)
+		free_array_item(array->items[i]);
+	free(array->items);
+	array->items = NULL;
+	array->nr = array->alloc = 0;
+}
+
 static int cmp_ref_sort(struct ref_sort *s, struct ref_array_item *a, struct ref_array_item *b)
 {
 	struct atom_value *va, *vb;
@@ -1141,5 +1161,6 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 		maxcount = ref_cbdata.array.nr;
 	for (i = 0; i < maxcount; i++)
 		show_ref(ref_cbdata.array.items[i], format, quote_style);
+	ref_array_clear(&ref_cbdata.array);
 	return 0;
 }
-- 
2.4.2

Re: [WIP/PATCH v5 05/10] for-each-ref: introduce 'ref_array_clear()'

[Matthieu Moy]

Karthik Nayak <karthik.188@gmail.com> writes:

> +/* Free all memory allocated for ref_array */
> +void ref_array_clear(struct ref_array *array)

Is this a private function? If so, then add static. If not, you probably
want to export it in a .h file.

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/

Re: [WIP/PATCH v5 05/10] for-each-ref: introduce 'ref_array_clear()'

[Karthik Nayak]

On 06/08/2015 08:23 PM, Matthieu Moy wrote:
> Karthik Nayak <karthik.188@gmail.com> writes:
>
> > +/* Free all memory allocated for ref_array */
> > +void ref_array_clear(struct ref_array *array)
>
> Is this a private function? If so, then add static. If not, you probably
> want to export it in a .h file.
>
It is in ref-filter.h.

-- 
Regards,
Karthik

Re: [WIP/PATCH v5 05/10] for-each-ref: introduce 'ref_array_clear()'

[Karthik Nayak]

On 06/08/2015 08:23 PM, Matthieu Moy wrote:
> Karthik Nayak <karthik.188@gmail.com> writes:
>
> > +/* Free all memory allocated for ref_array */
> > +void ref_array_clear(struct ref_array *array)
>
> Is this a private function? If so, then add static. If not, you probably
> want to export it in a .h file.
>
It is in ref-filter.h.

-- 
Regards,
Karthik

Re: [WIP/PATCH v5 05/10] for-each-ref: introduce 'ref_array_clear()'

[Matthieu Moy]

Karthik Nayak <karthik.188@gmail.com> writes:

> On 06/08/2015 08:23 PM, Matthieu Moy wrote:
>> Karthik Nayak <karthik.188@gmail.com> writes:
>>
>> > +/* Free all memory allocated for ref_array */
>> > +void ref_array_clear(struct ref_array *array)
>>
>> Is this a private function? If so, then add static. If not, you probably
>> want to export it in a .h file.
>>
> It is in ref-filter.h.

Ah, OK. It comes later in the series.

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/

Re: [WIP/PATCH v5 05/10] for-each-ref: introduce 'ref_array_clear()'

[Junio C Hamano]

Matthieu Moy <Matthieu.Moy@grenoble-inp.fr> writes:

> Karthik Nayak <karthik.188@gmail.com> writes:
>
>> On 06/08/2015 08:23 PM, Matthieu Moy wrote:
>>> Karthik Nayak <karthik.188@gmail.com> writes:
>>>
>>> > +/* Free all memory allocated for ref_array */
>>> > +void ref_array_clear(struct ref_array *array)
>>>
>>> Is this a private function? If so, then add static. If not, you probably
>>> want to export it in a .h file.
>>>
>> It is in ref-filter.h.
>
> Ah, OK. It comes later in the series.

Confused I am; if it comes later not in the same patch then it is
not OK, is it?

Re: [WIP/PATCH v5 05/10] for-each-ref: introduce 'ref_array_clear()'

[Matthieu Moy]

Junio C Hamano <gitster@pobox.com> writes:

> Matthieu Moy <Matthieu.Moy@grenoble-inp.fr> writes:
>
>> Karthik Nayak <karthik.188@gmail.com> writes:
>>
>>> On 06/08/2015 08:23 PM, Matthieu Moy wrote:
>>>> Karthik Nayak <karthik.188@gmail.com> writes:
>>>>
>>>> > +/* Free all memory allocated for ref_array */
>>>> > +void ref_array_clear(struct ref_array *array)
>>>>
>>>> Is this a private function? If so, then add static. If not, you probably
>>>> want to export it in a .h file.
>>>>
>>> It is in ref-filter.h.
>>
>> Ah, OK. It comes later in the series.
>
> Confused I am; if it comes later not in the same patch then it is
> not OK, is it?

We could introduce ref-filter.h earlier, indeed. To me, the current
solution is good enough, but introducing ref-filter.h early and adding
function definition there in the same commit as you drop the "static"
keyword for them would clearly be an improvement.

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/

Re: [WIP/PATCH v5 05/10] for-each-ref: introduce 'ref_array_clear()'

[Karthik Nayak]

On 06/08/2015 10:51 PM, Matthieu Moy wrote:
> Junio C Hamano <gitster@pobox.com> writes:
>
>> Matthieu Moy <Matthieu.Moy@grenoble-inp.fr> writes:
>>
>>> Karthik Nayak <karthik.188@gmail.com> writes:
>>>
>>>> On 06/08/2015 08:23 PM, Matthieu Moy wrote:
>>>>> Karthik Nayak <karthik.188@gmail.com> writes:
>>>>>
>>>>>> +/* Free all memory allocated for ref_array */
>>>>>> +void ref_array_clear(struct ref_array *array)
>>>>>
>>>>> Is this a private function? If so, then add static. If not, you probably
>>>>> want to export it in a .h file.
>>>>>
>>>> It is in ref-filter.h.
>>>
>>> Ah, OK. It comes later in the series.
>>
>> Confused I am; if it comes later not in the same patch then it is
>> not OK, is it?
>
> We could introduce ref-filter.h earlier, indeed. To me, the current
> solution is good enough, but introducing ref-filter.h early and adding
> function definition there in the same commit as you drop the "static"
> keyword for them would clearly be an improvement.
>

But that would break the flow, wouldn't it? I wanted ref-filter to be 
introduced together, hence right after ref-filter.h we move code to
ref-filter.c

-- 
Regards,
Karthik

Re: [WIP/PATCH v5 05/10] for-each-ref: introduce 'ref_array_clear()'

[Matthieu Moy]

Karthik Nayak <karthik.188@gmail.com> writes:

> On 06/08/2015 10:51 PM, Matthieu Moy wrote:

>> We could introduce ref-filter.h earlier, indeed. To me, the current
>> solution is good enough, but introducing ref-filter.h early and adding
>> function definition there in the same commit as you drop the "static"
>> keyword for them would clearly be an improvement.
>
> But that would break the flow, wouldn't it? I wanted ref-filter to be
> introduced together, hence right after ref-filter.h we move code to
> ref-filter.c

That's why I find the current solution good enough: it also has
advantages. But in the current series, when you say "make functions
public", you are not actually doing so since they're not exported in a
.h file.

Conversely, PATCH 07 does two things: move code from for-each-ref.c and
introduce new declarations. Had you introduced these declarations
earlier, this patch would have been pure code movement.

In both cases, you have intermediate states that are not fully
consistant: either you have public functions in the builtin/ directory
(which sometimes happen in Git's codebase, but we try to avoid it), or
you have non-static functions that are not declared in a .h.

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/

[WIP/PATCH v5 06/10] for-each-ref: rename some functions and make them public

[Karthik Nayak]

Rename some of the functions and make them publicly available.
This is a preparatory step for moving code from 'for-each-ref'
to 'ref-filter' to make meaningful, targeted services available to
other commands via public APIs.

Functions renamed are:
parse_atom()		-> 	parse_ref_filter_atom()
verify_format()		-> 	verify_ref_format()
get_value()		-> 	get_ref_atom_value()
grab_single_ref()	-> 	ref_filter_handler()
sort_ref()		->	ref_array_sort()
show_ref()		->	show_ref_array_item()
default_sort()		->	ref_default_sorting()
opt_parse_sort()	->	parse_opt_ref_sorting()
cmp_ref_sort()		->	cmp_ref_sorting()

Rename 'struct ref_sort' to 'struct ref_sorting' in this context.

Based-on-patch-by: Jeff King <peff@peff.net>
Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 builtin/for-each-ref.c | 67 +++++++++++++++++++++++++-------------------------
 1 file changed, 34 insertions(+), 33 deletions(-)

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index 54f03c9..f6403be 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -25,8 +25,8 @@ struct atom_value {
 	unsigned long ul; /* used for sorting when not FIELD_STR */
 };
 
-struct ref_sort {
-	struct ref_sort *next;
+struct ref_sorting {
+	struct ref_sorting *next;
 	int atom; /* index into 'struct atom_value *' array */
 	unsigned reverse : 1;
 };
@@ -112,7 +112,7 @@ static int need_color_reset_at_eol;
 /*
  * Used to parse format string and sort specifiers
  */
-static int parse_atom(const char *atom, const char *ep)
+int parse_ref_filter_atom(const char *atom, const char *ep)
 {
 	const char *sp;
 	int i, at;
@@ -189,7 +189,7 @@ static const char *find_next(const char *cp)
  * Make sure the format string is well formed, and parse out
  * the used atoms.
  */
-static int verify_format(const char *format)
+int verify_ref_format(const char *format)
 {
 	const char *cp, *sp;
 
@@ -201,7 +201,7 @@ static int verify_format(const char *format)
 		if (!ep)
 			return error("malformed format string %s", sp);
 		/* sp points at "%(" and ep points at the closing ")" */
-		at = parse_atom(sp + 2, ep);
+		at = parse_ref_filter_atom(sp + 2, ep);
 		cp = ep + 1;
 
 		if (skip_prefix(used_atom[at], "color:", &color))
@@ -408,7 +408,7 @@ static void grab_date(const char *buf, struct atom_value *v, const char *atomnam
 	/*
 	 * We got here because atomname ends in "date" or "date<something>";
 	 * it's not possible that <something> is not ":<format>" because
-	 * parse_atom() wouldn't have allowed it, so we can assume that no
+	 * parse_ref_filter_atom() wouldn't have allowed it, so we can assume that no
 	 * ":" means no format is specified, and use the default.
 	 */
 	formatp = strchr(atomname, ':');
@@ -835,7 +835,7 @@ static void populate_value(struct ref_array_item *ref)
  * Given a ref, return the value for the atom.  This lazily gets value
  * out of the object by calling populate value.
  */
-static void get_value(struct ref_array_item *ref, int atom, struct atom_value **v)
+static void get_ref_atom_value(struct ref_array_item *ref, int atom, struct atom_value **v)
 {
 	if (!ref->value) {
 		populate_value(ref);
@@ -885,7 +885,7 @@ static struct ref_array_item *new_ref_array_item(const char *refname,
  * A call-back given to for_each_ref().  Filter refs and keep them for
  * later object processing.
  */
-static int grab_single_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
+int ref_filter_handler(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 {
 	struct ref_filter_cbdata *ref_cbdata = cb_data;
 	struct ref_filter *filter = &ref_cbdata->filter;
@@ -931,14 +931,14 @@ void ref_array_clear(struct ref_array *array)
 	array->nr = array->alloc = 0;
 }
 
-static int cmp_ref_sort(struct ref_sort *s, struct ref_array_item *a, struct ref_array_item *b)
+static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, struct ref_array_item *b)
 {
 	struct atom_value *va, *vb;
 	int cmp;
 	cmp_type cmp_type = used_atom_type[s->atom];
 
-	get_value(a, s->atom, &va);
-	get_value(b, s->atom, &vb);
+	get_ref_atom_value(a, s->atom, &va);
+	get_ref_atom_value(b, s->atom, &vb);
 	switch (cmp_type) {
 	case FIELD_STR:
 		cmp = strcmp(va->s, vb->s);
@@ -955,24 +955,24 @@ static int cmp_ref_sort(struct ref_sort *s, struct ref_array_item *a, struct ref
 	return (s->reverse) ? -cmp : cmp;
 }
 
-static struct ref_sort *ref_sort;
+static struct ref_sorting *ref_sorting;
 static int compare_refs(const void *a_, const void *b_)
 {
 	struct ref_array_item *a = *((struct ref_array_item **)a_);
 	struct ref_array_item *b = *((struct ref_array_item **)b_);
-	struct ref_sort *s;
+	struct ref_sorting *s;
 
-	for (s = ref_sort; s; s = s->next) {
-		int cmp = cmp_ref_sort(s, a, b);
+	for (s = ref_sorting; s; s = s->next) {
+		int cmp = cmp_ref_sorting(s, a, b);
 		if (cmp)
 			return cmp;
 	}
 	return 0;
 }
 
-static void sort_refs(struct ref_sort *sort, struct ref_array *array)
+void ref_array_sort(struct ref_sorting *sort, struct ref_array *array)
 {
-	ref_sort = sort;
+	ref_sorting = sort;
 	qsort(array->items, array->nr, sizeof(struct ref_array_item *), compare_refs);
 }
 
@@ -1040,7 +1040,7 @@ static void emit(const char *cp, const char *ep)
 	}
 }
 
-static void show_ref(struct ref_array_item *info, const char *format, int quote_style)
+void show_ref_array_item(struct ref_array_item *info, const char *format, int quote_style)
 {
 	const char *cp, *sp, *ep;
 
@@ -1050,7 +1050,7 @@ static void show_ref(struct ref_array_item *info, const char *format, int quote_
 		ep = strchr(sp, ')');
 		if (cp < sp)
 			emit(cp, sp);
-		get_value(info, parse_atom(sp + 2, ep), &atomv);
+		get_ref_atom_value(info, parse_ref_filter_atom(sp + 2, ep), &atomv);
 		print_value(atomv, quote_style);
 	}
 	if (*cp) {
@@ -1069,21 +1069,22 @@ static void show_ref(struct ref_array_item *info, const char *format, int quote_
 	putchar('\n');
 }
 
-static struct ref_sort *default_sort(void)
+/*  If no sorting option is given, use refname to sort as default */
+struct ref_sorting *ref_default_sorting(void)
 {
 	static const char cstr_name[] = "refname";
 
-	struct ref_sort *sort = xcalloc(1, sizeof(*sort));
+	struct ref_sorting *sort = xcalloc(1, sizeof(*sort));
 
 	sort->next = NULL;
-	sort->atom = parse_atom(cstr_name, cstr_name + strlen(cstr_name));
+	sort->atom = parse_ref_filter_atom(cstr_name, cstr_name + strlen(cstr_name));
 	return sort;
 }
 
-static int opt_parse_sort(const struct option *opt, const char *arg, int unset)
+int parse_opt_ref_sorting(const struct option *opt, const char *arg, int unset)
 {
-	struct ref_sort **sort_tail = opt->value;
-	struct ref_sort *s;
+	struct ref_sorting **sort_tail = opt->value;
+	struct ref_sorting *s;
 	int len;
 
 	if (!arg) /* should --no-sort void the list ? */
@@ -1098,7 +1099,7 @@ static int opt_parse_sort(const struct option *opt, const char *arg, int unset)
 		arg++;
 	}
 	len = strlen(arg);
-	s->atom = parse_atom(arg, arg+len);
+	s->atom = parse_ref_filter_atom(arg, arg+len);
 	return 0;
 }
 
@@ -1111,7 +1112,7 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 {
 	int i;
 	const char *format = "%(objectname) %(objecttype)\t%(refname)";
-	struct ref_sort *sort = NULL, **sort_tail = &sort;
+	struct ref_sorting *sort = NULL, **sort_tail = &sort;
 	int maxcount = 0, quote_style = 0;
 	struct ref_filter_cbdata ref_cbdata;
 
@@ -1129,7 +1130,7 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 		OPT_INTEGER( 0 , "count", &maxcount, N_("show only <n> matched refs")),
 		OPT_STRING(  0 , "format", &format, N_("format"), N_("format to use for the output")),
 		OPT_CALLBACK(0 , "sort", sort_tail, N_("key"),
-			    N_("field name to sort on"), &opt_parse_sort),
+			    N_("field name to sort on"), &parse_opt_ref_sorting),
 		OPT_END(),
 	};
 
@@ -1142,25 +1143,25 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 		error("more than one quoting style?");
 		usage_with_options(for_each_ref_usage, opts);
 	}
-	if (verify_format(format))
+	if (verify_ref_format(format))
 		usage_with_options(for_each_ref_usage, opts);
 
 	if (!sort)
-		sort = default_sort();
+		sort = ref_default_sorting();
 
 	/* for warn_ambiguous_refs */
 	git_config(git_default_config, NULL);
 
 	memset(&ref_cbdata, 0, sizeof(ref_cbdata));
 	ref_cbdata.filter.name_patterns = argv;
-	for_each_rawref(grab_single_ref, &ref_cbdata);
+	for_each_rawref(ref_filter_handler, &ref_cbdata);
 
-	sort_refs(sort, &ref_cbdata.array);
+	ref_array_sort(sort, &ref_cbdata.array);
 
 	if (!maxcount || ref_cbdata.array.nr < maxcount)
 		maxcount = ref_cbdata.array.nr;
 	for (i = 0; i < maxcount; i++)
-		show_ref(ref_cbdata.array.items[i], format, quote_style);
+		show_ref_array_item(ref_cbdata.array.items[i], format, quote_style);
 	ref_array_clear(&ref_cbdata.array);
 	return 0;
 }
-- 
2.4.2

[WIP/PATCH v5 07/10] ref-filter: add 'ref-filter.h'

[Karthik Nayak]

This is step one of creating a common library for 'for-each-ref',
'branch -l' and 'tag -l'. This creates a header file with the
functions and data structures that ref-filter will provide.
We move the data structures created in for-each-ref to this header
file.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 builtin/for-each-ref.c | 41 +------------------------------
 ref-filter.h           | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 67 insertions(+), 40 deletions(-)
 create mode 100644 ref-filter.h

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index f6403be..39f7c9a 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -10,49 +10,10 @@
 #include "parse-options.h"
 #include "remote.h"
 #include "color.h"
-
-/* Quoting styles */
-#define QUOTE_NONE 0
-#define QUOTE_SHELL 1
-#define QUOTE_PERL 2
-#define QUOTE_PYTHON 4
-#define QUOTE_TCL 8
+#include "ref-filter.h"
 
 typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
 
-struct atom_value {
-	const char *s;
-	unsigned long ul; /* used for sorting when not FIELD_STR */
-};
-
-struct ref_sorting {
-	struct ref_sorting *next;
-	int atom; /* index into 'struct atom_value *' array */
-	unsigned reverse : 1;
-};
-
-struct ref_array_item {
-	unsigned char objectname[20];
-	int flag;
-	char *symref;
-	struct atom_value *value;
-	char *refname;
-};
-
-struct ref_array {
-	int nr, alloc;
-	struct ref_array_item **items;
-};
-
-struct ref_filter {
-	const char **name_patterns;
-};
-
-struct ref_filter_cbdata {
-	struct ref_array array;
-	struct ref_filter filter;
-};
-
 static struct {
 	const char *name;
 	cmp_type cmp_type;
diff --git a/ref-filter.h b/ref-filter.h
new file mode 100644
index 0000000..1432ff6
--- /dev/null
+++ b/ref-filter.h
@@ -0,0 +1,66 @@
+#ifndef REF_FILTER_H
+#define REF_FILTER_H
+
+#include "sha1-array.h"
+#include "refs.h"
+#include "commit.h"
+#include "parse-options.h"
+
+/* Quoting styles */
+#define QUOTE_NONE 0
+#define QUOTE_SHELL 1
+#define QUOTE_PERL 2
+#define QUOTE_PYTHON 4
+#define QUOTE_TCL 8
+
+struct atom_value {
+	const char *s;
+	unsigned long ul; /* used for sorting when not FIELD_STR */
+};
+
+struct ref_sorting {
+	struct ref_sorting *next;
+	int atom; /* index into 'struct atom_value *' array */
+	unsigned reverse : 1;
+};
+
+struct ref_array_item {
+	unsigned char objectname[20];
+	int flag;
+	char *symref;
+	struct atom_value *value;
+	char *refname;
+};
+
+struct ref_array {
+	int nr, alloc;
+	struct ref_array_item **items;
+};
+
+struct ref_filter {
+	const char **name_patterns;
+};
+
+struct ref_filter_cbdata {
+	struct ref_array array;
+	struct ref_filter filter;
+};
+
+/*  Callback function for for_each_*ref(). This filters the refs based on the filters set */
+int ref_filter_handler(const char *refname, const unsigned char *sha1, int flag, void *cb_data);
+/*  Clear all memory allocated to ref_array */
+void ref_array_clear(struct ref_array *array);
+/*  Parse format string and sort specifiers */
+int parse_ref_filter_atom(const char *atom, const char *ep);
+/*  Used to verify if the given format is correct and to parse out the used atoms */
+int verify_ref_format(const char *format);
+/*  Sort the given ref_array as per the ref_sorting provided */
+void ref_array_sort(struct ref_sorting *sort, struct ref_array *array);
+/*  Print the ref using the given format and quote_style */
+void show_ref_array_item(struct ref_array_item *info, const char *format, int quote_style);
+/*  Callback function for parsing the sort option */
+int parse_opt_ref_sorting(const struct option *opt, const char *arg, int unset);
+/*  Default sort option based on refname */
+struct ref_sorting *ref_default_sorting(void);
+
+#endif /*  REF_FILTER_H  */
-- 
2.4.2

[WIP/PATCH v5 08/10] ref-filter: move code from 'for-each-ref'

[Karthik Nayak]

Move most of the code from 'for-each-ref' to 'ref-filter' to make
it publicly available to other commands, this is to unify the code
of 'tag -l', 'branch -l' and 'for-each-ref' so that they can share
their implementations with each other.

Add 'ref-filter' to the Makefile, this completes the movement of code
from 'for-each-ref' to 'ref-filter'.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 Makefile               |    1 +
 builtin/for-each-ref.c | 1059 -----------------------------------------------
 ref-filter.c           | 1062 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 1063 insertions(+), 1059 deletions(-)
 create mode 100644 ref-filter.c

diff --git a/Makefile b/Makefile
index 54ec511..d715b66 100644
--- a/Makefile
+++ b/Makefile
@@ -762,6 +762,7 @@ LIB_OBJS += reachable.o
 LIB_OBJS += read-cache.o
 LIB_OBJS += reflog-walk.o
 LIB_OBJS += refs.o
+LIB_OBJS += ref-filter.o
 LIB_OBJS += remote.o
 LIB_OBJS += replace_object.o
 LIB_OBJS += rerere.o
diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index 39f7c9a..e237194 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -2,1068 +2,9 @@
 #include "cache.h"
 #include "refs.h"
 #include "object.h"
-#include "tag.h"
-#include "commit.h"
-#include "tree.h"
-#include "blob.h"
-#include "quote.h"
 #include "parse-options.h"
-#include "remote.h"
-#include "color.h"
 #include "ref-filter.h"
 
-typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
-
-static struct {
-	const char *name;
-	cmp_type cmp_type;
-} valid_atom[] = {
-	{ "refname" },
-	{ "objecttype" },
-	{ "objectsize", FIELD_ULONG },
-	{ "objectname" },
-	{ "tree" },
-	{ "parent" },
-	{ "numparent", FIELD_ULONG },
-	{ "object" },
-	{ "type" },
-	{ "tag" },
-	{ "author" },
-	{ "authorname" },
-	{ "authoremail" },
-	{ "authordate", FIELD_TIME },
-	{ "committer" },
-	{ "committername" },
-	{ "committeremail" },
-	{ "committerdate", FIELD_TIME },
-	{ "tagger" },
-	{ "taggername" },
-	{ "taggeremail" },
-	{ "taggerdate", FIELD_TIME },
-	{ "creator" },
-	{ "creatordate", FIELD_TIME },
-	{ "subject" },
-	{ "body" },
-	{ "contents" },
-	{ "contents:subject" },
-	{ "contents:body" },
-	{ "contents:signature" },
-	{ "upstream" },
-	{ "symref" },
-	{ "flag" },
-	{ "HEAD" },
-	{ "color" },
-};
-
-/*
- * An atom is a valid field atom listed above, possibly prefixed with
- * a "*" to denote deref_tag().
- *
- * We parse given format string and sort specifiers, and make a list
- * of properties that we need to extract out of objects.  ref_array_item
- * structure will hold an array of values extracted that can be
- * indexed with the "atom number", which is an index into this
- * array.
- */
-static const char **used_atom;
-static cmp_type *used_atom_type;
-static int used_atom_cnt, need_tagged, need_symref;
-static int need_color_reset_at_eol;
-
-/*
- * Used to parse format string and sort specifiers
- */
-int parse_ref_filter_atom(const char *atom, const char *ep)
-{
-	const char *sp;
-	int i, at;
-
-	sp = atom;
-	if (*sp == '*' && sp < ep)
-		sp++; /* deref */
-	if (ep <= sp)
-		die("malformed field name: %.*s", (int)(ep-atom), atom);
-
-	/* Do we have the atom already used elsewhere? */
-	for (i = 0; i < used_atom_cnt; i++) {
-		int len = strlen(used_atom[i]);
-		if (len == ep - atom && !memcmp(used_atom[i], atom, len))
-			return i;
-	}
-
-	/* Is the atom a valid one? */
-	for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
-		int len = strlen(valid_atom[i].name);
-		/*
-		 * If the atom name has a colon, strip it and everything after
-		 * it off - it specifies the format for this entry, and
-		 * shouldn't be used for checking against the valid_atom
-		 * table.
-		 */
-		const char *formatp = strchr(sp, ':');
-		if (!formatp || ep < formatp)
-			formatp = ep;
-		if (len == formatp - sp && !memcmp(valid_atom[i].name, sp, len))
-			break;
-	}
-
-	if (ARRAY_SIZE(valid_atom) <= i)
-		die("unknown field name: %.*s", (int)(ep-atom), atom);
-
-	/* Add it in, including the deref prefix */
-	at = used_atom_cnt;
-	used_atom_cnt++;
-	REALLOC_ARRAY(used_atom, used_atom_cnt);
-	REALLOC_ARRAY(used_atom_type, used_atom_cnt);
-	used_atom[at] = xmemdupz(atom, ep - atom);
-	used_atom_type[at] = valid_atom[i].cmp_type;
-	if (*atom == '*')
-		need_tagged = 1;
-	if (!strcmp(used_atom[at], "symref"))
-		need_symref = 1;
-	return at;
-}
-
-/*
- * In a format string, find the next occurrence of %(atom).
- */
-static const char *find_next(const char *cp)
-{
-	while (*cp) {
-		if (*cp == '%') {
-			/*
-			 * %( is the start of an atom;
-			 * %% is a quoted per-cent.
-			 */
-			if (cp[1] == '(')
-				return cp;
-			else if (cp[1] == '%')
-				cp++; /* skip over two % */
-			/* otherwise this is a singleton, literal % */
-		}
-		cp++;
-	}
-	return NULL;
-}
-
-/*
- * Make sure the format string is well formed, and parse out
- * the used atoms.
- */
-int verify_ref_format(const char *format)
-{
-	const char *cp, *sp;
-
-	need_color_reset_at_eol = 0;
-	for (cp = format; *cp && (sp = find_next(cp)); ) {
-		const char *color, *ep = strchr(sp, ')');
-		int at;
-
-		if (!ep)
-			return error("malformed format string %s", sp);
-		/* sp points at "%(" and ep points at the closing ")" */
-		at = parse_ref_filter_atom(sp + 2, ep);
-		cp = ep + 1;
-
-		if (skip_prefix(used_atom[at], "color:", &color))
-			need_color_reset_at_eol = !!strcmp(color, "reset");
-	}
-	return 0;
-}
-
-/*
- * Given an object name, read the object data and size, and return a
- * "struct object".  If the object data we are returning is also borrowed
- * by the "struct object" representation, set *eaten as well---it is a
- * signal from parse_object_buffer to us not to free the buffer.
- */
-static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
-{
-	enum object_type type;
-	void *buf = read_sha1_file(sha1, &type, sz);
-
-	if (buf)
-		*obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
-	else
-		*obj = NULL;
-	return buf;
-}
-
-static int grab_objectname(const char *name, const unsigned char *sha1,
-			    struct atom_value *v)
-{
-	if (!strcmp(name, "objectname")) {
-		char *s = xmalloc(41);
-		strcpy(s, sha1_to_hex(sha1));
-		v->s = s;
-		return 1;
-	}
-	if (!strcmp(name, "objectname:short")) {
-		v->s = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));
-		return 1;
-	}
-	return 0;
-}
-
-/* See grab_values */
-static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
-{
-	int i;
-
-	for (i = 0; i < used_atom_cnt; i++) {
-		const char *name = used_atom[i];
-		struct atom_value *v = &val[i];
-		if (!!deref != (*name == '*'))
-			continue;
-		if (deref)
-			name++;
-		if (!strcmp(name, "objecttype"))
-			v->s = typename(obj->type);
-		else if (!strcmp(name, "objectsize")) {
-			char *s = xmalloc(40);
-			sprintf(s, "%lu", sz);
-			v->ul = sz;
-			v->s = s;
-		}
-		else if (deref)
-			grab_objectname(name, obj->sha1, v);
-	}
-}
-
-/* See grab_values */
-static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
-{
-	int i;
-	struct tag *tag = (struct tag *) obj;
-
-	for (i = 0; i < used_atom_cnt; i++) {
-		const char *name = used_atom[i];
-		struct atom_value *v = &val[i];
-		if (!!deref != (*name == '*'))
-			continue;
-		if (deref)
-			name++;
-		if (!strcmp(name, "tag"))
-			v->s = tag->tag;
-		else if (!strcmp(name, "type") && tag->tagged)
-			v->s = typename(tag->tagged->type);
-		else if (!strcmp(name, "object") && tag->tagged) {
-			char *s = xmalloc(41);
-			strcpy(s, sha1_to_hex(tag->tagged->sha1));
-			v->s = s;
-		}
-	}
-}
-
-/* See grab_values */
-static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
-{
-	int i;
-	struct commit *commit = (struct commit *) obj;
-
-	for (i = 0; i < used_atom_cnt; i++) {
-		const char *name = used_atom[i];
-		struct atom_value *v = &val[i];
-		if (!!deref != (*name == '*'))
-			continue;
-		if (deref)
-			name++;
-		if (!strcmp(name, "tree")) {
-			char *s = xmalloc(41);
-			strcpy(s, sha1_to_hex(commit->tree->object.sha1));
-			v->s = s;
-		}
-		if (!strcmp(name, "numparent")) {
-			char *s = xmalloc(40);
-			v->ul = commit_list_count(commit->parents);
-			sprintf(s, "%lu", v->ul);
-			v->s = s;
-		}
-		else if (!strcmp(name, "parent")) {
-			int num = commit_list_count(commit->parents);
-			int i;
-			struct commit_list *parents;
-			char *s = xmalloc(41 * num + 1);
-			v->s = s;
-			for (i = 0, parents = commit->parents;
-			     parents;
-			     parents = parents->next, i = i + 41) {
-				struct commit *parent = parents->item;
-				strcpy(s+i, sha1_to_hex(parent->object.sha1));
-				if (parents->next)
-					s[i+40] = ' ';
-			}
-			if (!i)
-				*s = '\0';
-		}
-	}
-}
-
-static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
-{
-	const char *eol;
-	while (*buf) {
-		if (!strncmp(buf, who, wholen) &&
-		    buf[wholen] == ' ')
-			return buf + wholen + 1;
-		eol = strchr(buf, '\n');
-		if (!eol)
-			return "";
-		eol++;
-		if (*eol == '\n')
-			return ""; /* end of header */
-		buf = eol;
-	}
-	return "";
-}
-
-static const char *copy_line(const char *buf)
-{
-	const char *eol = strchrnul(buf, '\n');
-	return xmemdupz(buf, eol - buf);
-}
-
-static const char *copy_name(const char *buf)
-{
-	const char *cp;
-	for (cp = buf; *cp && *cp != '\n'; cp++) {
-		if (!strncmp(cp, " <", 2))
-			return xmemdupz(buf, cp - buf);
-	}
-	return "";
-}
-
-static const char *copy_email(const char *buf)
-{
-	const char *email = strchr(buf, '<');
-	const char *eoemail;
-	if (!email)
-		return "";
-	eoemail = strchr(email, '>');
-	if (!eoemail)
-		return "";
-	return xmemdupz(email, eoemail + 1 - email);
-}
-
-static char *copy_subject(const char *buf, unsigned long len)
-{
-	char *r = xmemdupz(buf, len);
-	int i;
-
-	for (i = 0; i < len; i++)
-		if (r[i] == '\n')
-			r[i] = ' ';
-
-	return r;
-}
-
-static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
-{
-	const char *eoemail = strstr(buf, "> ");
-	char *zone;
-	unsigned long timestamp;
-	long tz;
-	enum date_mode date_mode = DATE_NORMAL;
-	const char *formatp;
-
-	/*
-	 * We got here because atomname ends in "date" or "date<something>";
-	 * it's not possible that <something> is not ":<format>" because
-	 * parse_ref_filter_atom() wouldn't have allowed it, so we can assume that no
-	 * ":" means no format is specified, and use the default.
-	 */
-	formatp = strchr(atomname, ':');
-	if (formatp != NULL) {
-		formatp++;
-		date_mode = parse_date_format(formatp);
-	}
-
-	if (!eoemail)
-		goto bad;
-	timestamp = strtoul(eoemail + 2, &zone, 10);
-	if (timestamp == ULONG_MAX)
-		goto bad;
-	tz = strtol(zone, NULL, 10);
-	if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
-		goto bad;
-	v->s = xstrdup(show_date(timestamp, tz, date_mode));
-	v->ul = timestamp;
-	return;
- bad:
-	v->s = "";
-	v->ul = 0;
-}
-
-/* See grab_values */
-static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
-{
-	int i;
-	int wholen = strlen(who);
-	const char *wholine = NULL;
-
-	for (i = 0; i < used_atom_cnt; i++) {
-		const char *name = used_atom[i];
-		struct atom_value *v = &val[i];
-		if (!!deref != (*name == '*'))
-			continue;
-		if (deref)
-			name++;
-		if (strncmp(who, name, wholen))
-			continue;
-		if (name[wholen] != 0 &&
-		    strcmp(name + wholen, "name") &&
-		    strcmp(name + wholen, "email") &&
-		    !starts_with(name + wholen, "date"))
-			continue;
-		if (!wholine)
-			wholine = find_wholine(who, wholen, buf, sz);
-		if (!wholine)
-			return; /* no point looking for it */
-		if (name[wholen] == 0)
-			v->s = copy_line(wholine);
-		else if (!strcmp(name + wholen, "name"))
-			v->s = copy_name(wholine);
-		else if (!strcmp(name + wholen, "email"))
-			v->s = copy_email(wholine);
-		else if (starts_with(name + wholen, "date"))
-			grab_date(wholine, v, name);
-	}
-
-	/*
-	 * For a tag or a commit object, if "creator" or "creatordate" is
-	 * requested, do something special.
-	 */
-	if (strcmp(who, "tagger") && strcmp(who, "committer"))
-		return; /* "author" for commit object is not wanted */
-	if (!wholine)
-		wholine = find_wholine(who, wholen, buf, sz);
-	if (!wholine)
-		return;
-	for (i = 0; i < used_atom_cnt; i++) {
-		const char *name = used_atom[i];
-		struct atom_value *v = &val[i];
-		if (!!deref != (*name == '*'))
-			continue;
-		if (deref)
-			name++;
-
-		if (starts_with(name, "creatordate"))
-			grab_date(wholine, v, name);
-		else if (!strcmp(name, "creator"))
-			v->s = copy_line(wholine);
-	}
-}
-
-static void find_subpos(const char *buf, unsigned long sz,
-			const char **sub, unsigned long *sublen,
-			const char **body, unsigned long *bodylen,
-			unsigned long *nonsiglen,
-			const char **sig, unsigned long *siglen)
-{
-	const char *eol;
-	/* skip past header until we hit empty line */
-	while (*buf && *buf != '\n') {
-		eol = strchrnul(buf, '\n');
-		if (*eol)
-			eol++;
-		buf = eol;
-	}
-	/* skip any empty lines */
-	while (*buf == '\n')
-		buf++;
-
-	/* parse signature first; we might not even have a subject line */
-	*sig = buf + parse_signature(buf, strlen(buf));
-	*siglen = strlen(*sig);
-
-	/* subject is first non-empty line */
-	*sub = buf;
-	/* subject goes to first empty line */
-	while (buf < *sig && *buf && *buf != '\n') {
-		eol = strchrnul(buf, '\n');
-		if (*eol)
-			eol++;
-		buf = eol;
-	}
-	*sublen = buf - *sub;
-	/* drop trailing newline, if present */
-	if (*sublen && (*sub)[*sublen - 1] == '\n')
-		*sublen -= 1;
-
-	/* skip any empty lines */
-	while (*buf == '\n')
-		buf++;
-	*body = buf;
-	*bodylen = strlen(buf);
-	*nonsiglen = *sig - buf;
-}
-
-/* See grab_values */
-static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
-{
-	int i;
-	const char *subpos = NULL, *bodypos = NULL, *sigpos = NULL;
-	unsigned long sublen = 0, bodylen = 0, nonsiglen = 0, siglen = 0;
-
-	for (i = 0; i < used_atom_cnt; i++) {
-		const char *name = used_atom[i];
-		struct atom_value *v = &val[i];
-		if (!!deref != (*name == '*'))
-			continue;
-		if (deref)
-			name++;
-		if (strcmp(name, "subject") &&
-		    strcmp(name, "body") &&
-		    strcmp(name, "contents") &&
-		    strcmp(name, "contents:subject") &&
-		    strcmp(name, "contents:body") &&
-		    strcmp(name, "contents:signature"))
-			continue;
-		if (!subpos)
-			find_subpos(buf, sz,
-				    &subpos, &sublen,
-				    &bodypos, &bodylen, &nonsiglen,
-				    &sigpos, &siglen);
-
-		if (!strcmp(name, "subject"))
-			v->s = copy_subject(subpos, sublen);
-		else if (!strcmp(name, "contents:subject"))
-			v->s = copy_subject(subpos, sublen);
-		else if (!strcmp(name, "body"))
-			v->s = xmemdupz(bodypos, bodylen);
-		else if (!strcmp(name, "contents:body"))
-			v->s = xmemdupz(bodypos, nonsiglen);
-		else if (!strcmp(name, "contents:signature"))
-			v->s = xmemdupz(sigpos, siglen);
-		else if (!strcmp(name, "contents"))
-			v->s = xstrdup(subpos);
-	}
-}
-
-/*
- * We want to have empty print-string for field requests
- * that do not apply (e.g. "authordate" for a tag object)
- */
-static void fill_missing_values(struct atom_value *val)
-{
-	int i;
-	for (i = 0; i < used_atom_cnt; i++) {
-		struct atom_value *v = &val[i];
-		if (v->s == NULL)
-			v->s = "";
-	}
-}
-
-/*
- * val is a list of atom_value to hold returned values.  Extract
- * the values for atoms in used_atom array out of (obj, buf, sz).
- * when deref is false, (obj, buf, sz) is the object that is
- * pointed at by the ref itself; otherwise it is the object the
- * ref (which is a tag) refers to.
- */
-static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
-{
-	grab_common_values(val, deref, obj, buf, sz);
-	switch (obj->type) {
-	case OBJ_TAG:
-		grab_tag_values(val, deref, obj, buf, sz);
-		grab_sub_body_contents(val, deref, obj, buf, sz);
-		grab_person("tagger", val, deref, obj, buf, sz);
-		break;
-	case OBJ_COMMIT:
-		grab_commit_values(val, deref, obj, buf, sz);
-		grab_sub_body_contents(val, deref, obj, buf, sz);
-		grab_person("author", val, deref, obj, buf, sz);
-		grab_person("committer", val, deref, obj, buf, sz);
-		break;
-	case OBJ_TREE:
-		/* grab_tree_values(val, deref, obj, buf, sz); */
-		break;
-	case OBJ_BLOB:
-		/* grab_blob_values(val, deref, obj, buf, sz); */
-		break;
-	default:
-		die("Eh?  Object of type %d?", obj->type);
-	}
-}
-
-static inline char *copy_advance(char *dst, const char *src)
-{
-	while (*src)
-		*dst++ = *src++;
-	return dst;
-}
-
-/*
- * Parse the object referred by ref, and grab needed value.
- */
-static void populate_value(struct ref_array_item *ref)
-{
-	void *buf;
-	struct object *obj;
-	int eaten, i;
-	unsigned long size;
-	const unsigned char *tagged;
-
-	ref->value = xcalloc(used_atom_cnt, sizeof(struct atom_value));
-
-	if (need_symref && (ref->flag & REF_ISSYMREF) && !ref->symref) {
-		unsigned char unused1[20];
-		ref->symref = resolve_refdup(ref->refname, RESOLVE_REF_READING,
-					     unused1, NULL);
-		if (!ref->symref)
-			ref->symref = "";
-	}
-
-	/* Fill in specials first */
-	for (i = 0; i < used_atom_cnt; i++) {
-		const char *name = used_atom[i];
-		struct atom_value *v = &ref->value[i];
-		int deref = 0;
-		const char *refname;
-		const char *formatp;
-		struct branch *branch = NULL;
-
-		if (*name == '*') {
-			deref = 1;
-			name++;
-		}
-
-		if (starts_with(name, "refname"))
-			refname = ref->refname;
-		else if (starts_with(name, "symref"))
-			refname = ref->symref ? ref->symref : "";
-		else if (starts_with(name, "upstream")) {
-			/* only local branches may have an upstream */
-			if (!starts_with(ref->refname, "refs/heads/"))
-				continue;
-			branch = branch_get(ref->refname + 11);
-
-			if (!branch || !branch->merge || !branch->merge[0] ||
-			    !branch->merge[0]->dst)
-				continue;
-			refname = branch->merge[0]->dst;
-		} else if (starts_with(name, "color:")) {
-			char color[COLOR_MAXLEN] = "";
-
-			if (color_parse(name + 6, color) < 0)
-				die(_("unable to parse format"));
-			v->s = xstrdup(color);
-			continue;
-		} else if (!strcmp(name, "flag")) {
-			char buf[256], *cp = buf;
-			if (ref->flag & REF_ISSYMREF)
-				cp = copy_advance(cp, ",symref");
-			if (ref->flag & REF_ISPACKED)
-				cp = copy_advance(cp, ",packed");
-			if (cp == buf)
-				v->s = "";
-			else {
-				*cp = '\0';
-				v->s = xstrdup(buf + 1);
-			}
-			continue;
-		} else if (!deref && grab_objectname(name, ref->objectname, v)) {
-			continue;
-		} else if (!strcmp(name, "HEAD")) {
-			const char *head;
-			unsigned char sha1[20];
-
-			head = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
-						  sha1, NULL);
-			if (!strcmp(ref->refname, head))
-				v->s = "*";
-			else
-				v->s = " ";
-			continue;
-		} else
-			continue;
-
-		formatp = strchr(name, ':');
-		if (formatp) {
-			int num_ours, num_theirs;
-
-			formatp++;
-			if (!strcmp(formatp, "short"))
-				refname = shorten_unambiguous_ref(refname,
-						      warn_ambiguous_refs);
-			else if (!strcmp(formatp, "track") &&
-				 starts_with(name, "upstream")) {
-				char buf[40];
-
-				if (stat_tracking_info(branch, &num_ours,
-						       &num_theirs) != 1)
-					continue;
-
-				if (!num_ours && !num_theirs)
-					v->s = "";
-				else if (!num_ours) {
-					sprintf(buf, "[behind %d]", num_theirs);
-					v->s = xstrdup(buf);
-				} else if (!num_theirs) {
-					sprintf(buf, "[ahead %d]", num_ours);
-					v->s = xstrdup(buf);
-				} else {
-					sprintf(buf, "[ahead %d, behind %d]",
-						num_ours, num_theirs);
-					v->s = xstrdup(buf);
-				}
-				continue;
-			} else if (!strcmp(formatp, "trackshort") &&
-				   starts_with(name, "upstream")) {
-				assert(branch);
-
-				if (stat_tracking_info(branch, &num_ours,
-							&num_theirs) != 1)
-					continue;
-
-				if (!num_ours && !num_theirs)
-					v->s = "=";
-				else if (!num_ours)
-					v->s = "<";
-				else if (!num_theirs)
-					v->s = ">";
-				else
-					v->s = "<>";
-				continue;
-			} else
-				die("unknown %.*s format %s",
-				    (int)(formatp - name), name, formatp);
-		}
-
-		if (!deref)
-			v->s = refname;
-		else {
-			int len = strlen(refname);
-			char *s = xmalloc(len + 4);
-			sprintf(s, "%s^{}", refname);
-			v->s = s;
-		}
-	}
-
-	for (i = 0; i < used_atom_cnt; i++) {
-		struct atom_value *v = &ref->value[i];
-		if (v->s == NULL)
-			goto need_obj;
-	}
-	return;
-
- need_obj:
-	buf = get_obj(ref->objectname, &obj, &size, &eaten);
-	if (!buf)
-		die("missing object %s for %s",
-		    sha1_to_hex(ref->objectname), ref->refname);
-	if (!obj)
-		die("parse_object_buffer failed on %s for %s",
-		    sha1_to_hex(ref->objectname), ref->refname);
-
-	grab_values(ref->value, 0, obj, buf, size);
-	if (!eaten)
-		free(buf);
-
-	/*
-	 * If there is no atom that wants to know about tagged
-	 * object, we are done.
-	 */
-	if (!need_tagged || (obj->type != OBJ_TAG))
-		return;
-
-	/*
-	 * If it is a tag object, see if we use a value that derefs
-	 * the object, and if we do grab the object it refers to.
-	 */
-	tagged = ((struct tag *)obj)->tagged->sha1;
-
-	/*
-	 * NEEDSWORK: This derefs tag only once, which
-	 * is good to deal with chains of trust, but
-	 * is not consistent with what deref_tag() does
-	 * which peels the onion to the core.
-	 */
-	buf = get_obj(tagged, &obj, &size, &eaten);
-	if (!buf)
-		die("missing object %s for %s",
-		    sha1_to_hex(tagged), ref->refname);
-	if (!obj)
-		die("parse_object_buffer failed on %s for %s",
-		    sha1_to_hex(tagged), ref->refname);
-	grab_values(ref->value, 1, obj, buf, size);
-	if (!eaten)
-		free(buf);
-}
-
-/*
- * Given a ref, return the value for the atom.  This lazily gets value
- * out of the object by calling populate value.
- */
-static void get_ref_atom_value(struct ref_array_item *ref, int atom, struct atom_value **v)
-{
-	if (!ref->value) {
-		populate_value(ref);
-		fill_missing_values(ref->value);
-	}
-	*v = &ref->value[atom];
-}
-
-/*
- * Given a refname, return 1 if the refname matches with one of the patterns
- * while the pattern is a pathname like 'refs/tags' or 'refs/heads/master'
- * and so on, else return 0. Supports use of wild characters.
- */
-static int match_name_as_path(const char **pattern, const char *refname)
-{
-	int namelen = strlen(refname);
-	for (; *pattern; pattern++) {
-		const char *p = *pattern;
-		int plen = strlen(p);
-
-		if ((plen <= namelen) &&
-		    !strncmp(refname, p, plen) &&
-		    (refname[plen] == '\0' ||
-		     refname[plen] == '/' ||
-		     p[plen-1] == '/'))
-			return 1;
-		if (!wildmatch(p, refname, WM_PATHNAME, NULL))
-			return 1;
-	}
-	return 0;
-}
-
-/* Allocate space for a new ref_array_item and copy the objectname and flag to it */
-static struct ref_array_item *new_ref_array_item(const char *refname,
-						 const unsigned char *objectname,
-						 int flag)
-{
-	struct ref_array_item *ref = xcalloc(1, sizeof(struct ref_array_item));
-	ref->refname = xstrdup(refname);
-	hashcpy(ref->objectname, objectname);
-	ref->flag = flag;
-
-	return ref;
-}
-
-/*
- * A call-back given to for_each_ref().  Filter refs and keep them for
- * later object processing.
- */
-int ref_filter_handler(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
-{
-	struct ref_filter_cbdata *ref_cbdata = cb_data;
-	struct ref_filter *filter = &ref_cbdata->filter;
-	struct ref_array_item *ref;
-
-	if (flag & REF_BAD_NAME) {
-		  warning("ignoring ref with broken name %s", refname);
-		  return 0;
-	}
-
-	if (*filter->name_patterns && !match_name_as_path(filter->name_patterns, refname))
-		return 0;
-
-	/*
-	 * We do not open the object yet; sort may only need refname
-	 * to do its job and the resulting list may yet to be pruned
-	 * by maxcount logic.
-	 */
-	ref = new_ref_array_item(refname, sha1, flag);
-
-	REALLOC_ARRAY(ref_cbdata->array.items, ref_cbdata->array.nr + 1);
-	ref_cbdata->array.items[ref_cbdata->array.nr++] = ref;
-	return 0;
-}
-
-/*  Free memory allocated for a ref_array_item */
-static void free_array_item(struct ref_array_item *item)
-{
-	free(item->symref);
-	free(item->refname);
-	free(item);
-}
-
-/* Free all memory allocated for ref_array */
-void ref_array_clear(struct ref_array *array)
-{
-	int i;
-
-	for (i = 0; i < array->nr; i++)
-		free_array_item(array->items[i]);
-	free(array->items);
-	array->items = NULL;
-	array->nr = array->alloc = 0;
-}
-
-static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, struct ref_array_item *b)
-{
-	struct atom_value *va, *vb;
-	int cmp;
-	cmp_type cmp_type = used_atom_type[s->atom];
-
-	get_ref_atom_value(a, s->atom, &va);
-	get_ref_atom_value(b, s->atom, &vb);
-	switch (cmp_type) {
-	case FIELD_STR:
-		cmp = strcmp(va->s, vb->s);
-		break;
-	default:
-		if (va->ul < vb->ul)
-			cmp = -1;
-		else if (va->ul == vb->ul)
-			cmp = 0;
-		else
-			cmp = 1;
-		break;
-	}
-	return (s->reverse) ? -cmp : cmp;
-}
-
-static struct ref_sorting *ref_sorting;
-static int compare_refs(const void *a_, const void *b_)
-{
-	struct ref_array_item *a = *((struct ref_array_item **)a_);
-	struct ref_array_item *b = *((struct ref_array_item **)b_);
-	struct ref_sorting *s;
-
-	for (s = ref_sorting; s; s = s->next) {
-		int cmp = cmp_ref_sorting(s, a, b);
-		if (cmp)
-			return cmp;
-	}
-	return 0;
-}
-
-void ref_array_sort(struct ref_sorting *sort, struct ref_array *array)
-{
-	ref_sorting = sort;
-	qsort(array->items, array->nr, sizeof(struct ref_array_item *), compare_refs);
-}
-
-static void print_value(struct atom_value *v, int quote_style)
-{
-	struct strbuf sb = STRBUF_INIT;
-	switch (quote_style) {
-	case QUOTE_NONE:
-		fputs(v->s, stdout);
-		break;
-	case QUOTE_SHELL:
-		sq_quote_buf(&sb, v->s);
-		break;
-	case QUOTE_PERL:
-		perl_quote_buf(&sb, v->s);
-		break;
-	case QUOTE_PYTHON:
-		python_quote_buf(&sb, v->s);
-		break;
-	case QUOTE_TCL:
-		tcl_quote_buf(&sb, v->s);
-		break;
-	}
-	if (quote_style != QUOTE_NONE) {
-		fputs(sb.buf, stdout);
-		strbuf_release(&sb);
-	}
-}
-
-static int hex1(char ch)
-{
-	if ('0' <= ch && ch <= '9')
-		return ch - '0';
-	else if ('a' <= ch && ch <= 'f')
-		return ch - 'a' + 10;
-	else if ('A' <= ch && ch <= 'F')
-		return ch - 'A' + 10;
-	return -1;
-}
-static int hex2(const char *cp)
-{
-	if (cp[0] && cp[1])
-		return (hex1(cp[0]) << 4) | hex1(cp[1]);
-	else
-		return -1;
-}
-
-static void emit(const char *cp, const char *ep)
-{
-	while (*cp && (!ep || cp < ep)) {
-		if (*cp == '%') {
-			if (cp[1] == '%')
-				cp++;
-			else {
-				int ch = hex2(cp + 1);
-				if (0 <= ch) {
-					putchar(ch);
-					cp += 3;
-					continue;
-				}
-			}
-		}
-		putchar(*cp);
-		cp++;
-	}
-}
-
-void show_ref_array_item(struct ref_array_item *info, const char *format, int quote_style)
-{
-	const char *cp, *sp, *ep;
-
-	for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
-		struct atom_value *atomv;
-
-		ep = strchr(sp, ')');
-		if (cp < sp)
-			emit(cp, sp);
-		get_ref_atom_value(info, parse_ref_filter_atom(sp + 2, ep), &atomv);
-		print_value(atomv, quote_style);
-	}
-	if (*cp) {
-		sp = cp + strlen(cp);
-		emit(cp, sp);
-	}
-	if (need_color_reset_at_eol) {
-		struct atom_value resetv;
-		char color[COLOR_MAXLEN] = "";
-
-		if (color_parse("reset", color) < 0)
-			die("BUG: couldn't parse 'reset' as a color");
-		resetv.s = color;
-		print_value(&resetv, quote_style);
-	}
-	putchar('\n');
-}
-
-/*  If no sorting option is given, use refname to sort as default */
-struct ref_sorting *ref_default_sorting(void)
-{
-	static const char cstr_name[] = "refname";
-
-	struct ref_sorting *sort = xcalloc(1, sizeof(*sort));
-
-	sort->next = NULL;
-	sort->atom = parse_ref_filter_atom(cstr_name, cstr_name + strlen(cstr_name));
-	return sort;
-}
-
-int parse_opt_ref_sorting(const struct option *opt, const char *arg, int unset)
-{
-	struct ref_sorting **sort_tail = opt->value;
-	struct ref_sorting *s;
-	int len;
-
-	if (!arg) /* should --no-sort void the list ? */
-		return -1;
-
-	s = xcalloc(1, sizeof(*s));
-	s->next = *sort_tail;
-	*sort_tail = s;
-
-	if (*arg == '-') {
-		s->reverse = 1;
-		arg++;
-	}
-	len = strlen(arg);
-	s->atom = parse_ref_filter_atom(arg, arg+len);
-	return 0;
-}
-
 static char const * const for_each_ref_usage[] = {
 	N_("git for-each-ref [<options>] [<pattern>]"),
 	NULL
diff --git a/ref-filter.c b/ref-filter.c
new file mode 100644
index 0000000..95e72f6
--- /dev/null
+++ b/ref-filter.c
@@ -0,0 +1,1062 @@
+#include "builtin.h"
+#include "cache.h"
+#include "parse-options.h"
+#include "refs.h"
+#include "wildmatch.h"
+#include "commit.h"
+#include "remote.h"
+#include "color.h"
+#include "tag.h"
+#include "quote.h"
+
+typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
+
+static struct {
+	const char *name;
+	cmp_type cmp_type;
+} valid_atom[] = {
+	{ "refname" },
+	{ "objecttype" },
+	{ "objectsize", FIELD_ULONG },
+	{ "objectname" },
+	{ "tree" },
+	{ "parent" },
+	{ "numparent", FIELD_ULONG },
+	{ "object" },
+	{ "type" },
+	{ "tag" },
+	{ "author" },
+	{ "authorname" },
+	{ "authoremail" },
+	{ "authordate", FIELD_TIME },
+	{ "committer" },
+	{ "committername" },
+	{ "committeremail" },
+	{ "committerdate", FIELD_TIME },
+	{ "tagger" },
+	{ "taggername" },
+	{ "taggeremail" },
+	{ "taggerdate", FIELD_TIME },
+	{ "creator" },
+	{ "creatordate", FIELD_TIME },
+	{ "subject" },
+	{ "body" },
+	{ "contents" },
+	{ "contents:subject" },
+	{ "contents:body" },
+	{ "contents:signature" },
+	{ "upstream" },
+	{ "symref" },
+	{ "flag" },
+	{ "HEAD" },
+	{ "color" },
+};
+
+/*
+ * An atom is a valid field atom listed above, possibly prefixed with
+ * a "*" to denote deref_tag().
+ *
+ * We parse given format string and sort specifiers, and make a list
+ * of properties that we need to extract out of objects.  ref_array_item
+ * structure will hold an array of values extracted that can be
+ * indexed with the "atom number", which is an index into this
+ * array.
+ */
+static const char **used_atom;
+static cmp_type *used_atom_type;
+static int used_atom_cnt, need_tagged, need_symref;
+static int need_color_reset_at_eol;
+
+/*
+ * Used to parse format string and sort specifiers
+ */
+int parse_ref_filter_atom(const char *atom, const char *ep)
+{
+	const char *sp;
+	int i, at;
+
+	sp = atom;
+	if (*sp == '*' && sp < ep)
+		sp++; /* deref */
+	if (ep <= sp)
+		die("malformed field name: %.*s", (int)(ep-atom), atom);
+
+	/* Do we have the atom already used elsewhere? */
+	for (i = 0; i < used_atom_cnt; i++) {
+		int len = strlen(used_atom[i]);
+		if (len == ep - atom && !memcmp(used_atom[i], atom, len))
+			return i;
+	}
+
+	/* Is the atom a valid one? */
+	for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
+		int len = strlen(valid_atom[i].name);
+		/*
+		 * If the atom name has a colon, strip it and everything after
+		 * it off - it specifies the format for this entry, and
+		 * shouldn't be used for checking against the valid_atom
+		 * table.
+		 */
+		const char *formatp = strchr(sp, ':');
+		if (!formatp || ep < formatp)
+			formatp = ep;
+		if (len == formatp - sp && !memcmp(valid_atom[i].name, sp, len))
+			break;
+	}
+
+	if (ARRAY_SIZE(valid_atom) <= i)
+		die("unknown field name: %.*s", (int)(ep-atom), atom);
+
+	/* Add it in, including the deref prefix */
+	at = used_atom_cnt;
+	used_atom_cnt++;
+	REALLOC_ARRAY(used_atom, used_atom_cnt);
+	REALLOC_ARRAY(used_atom_type, used_atom_cnt);
+	used_atom[at] = xmemdupz(atom, ep - atom);
+	used_atom_type[at] = valid_atom[i].cmp_type;
+	if (*atom == '*')
+		need_tagged = 1;
+	if (!strcmp(used_atom[at], "symref"))
+		need_symref = 1;
+	return at;
+}
+
+/*
+ * In a format string, find the next occurrence of %(atom).
+ */
+static const char *find_next(const char *cp)
+{
+	while (*cp) {
+		if (*cp == '%') {
+			/*
+			 * %( is the start of an atom;
+			 * %% is a quoted per-cent.
+			 */
+			if (cp[1] == '(')
+				return cp;
+			else if (cp[1] == '%')
+				cp++; /* skip over two % */
+			/* otherwise this is a singleton, literal % */
+		}
+		cp++;
+	}
+	return NULL;
+}
+
+/*
+ * Make sure the format string is well formed, and parse out
+ * the used atoms.
+ */
+int verify_ref_format(const char *format)
+{
+	const char *cp, *sp;
+
+	need_color_reset_at_eol = 0;
+	for (cp = format; *cp && (sp = find_next(cp)); ) {
+		const char *color, *ep = strchr(sp, ')');
+		int at;
+
+		if (!ep)
+			return error("malformed format string %s", sp);
+		/* sp points at "%(" and ep points at the closing ")" */
+		at = parse_ref_filter_atom(sp + 2, ep);
+		cp = ep + 1;
+
+		if (skip_prefix(used_atom[at], "color:", &color))
+			need_color_reset_at_eol = !!strcmp(color, "reset");
+	}
+	return 0;
+}
+
+/*
+ * Given an object name, read the object data and size, and return a
+ * "struct object".  If the object data we are returning is also borrowed
+ * by the "struct object" representation, set *eaten as well---it is a
+ * signal from parse_object_buffer to us not to free the buffer.
+ */
+static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
+{
+	enum object_type type;
+	void *buf = read_sha1_file(sha1, &type, sz);
+
+	if (buf)
+		*obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
+	else
+		*obj = NULL;
+	return buf;
+}
+
+static int grab_objectname(const char *name, const unsigned char *sha1,
+			    struct atom_value *v)
+{
+	if (!strcmp(name, "objectname")) {
+		char *s = xmalloc(41);
+		strcpy(s, sha1_to_hex(sha1));
+		v->s = s;
+		return 1;
+	}
+	if (!strcmp(name, "objectname:short")) {
+		v->s = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));
+		return 1;
+	}
+	return 0;
+}
+
+/* See grab_values */
+static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
+{
+	int i;
+
+	for (i = 0; i < used_atom_cnt; i++) {
+		const char *name = used_atom[i];
+		struct atom_value *v = &val[i];
+		if (!!deref != (*name == '*'))
+			continue;
+		if (deref)
+			name++;
+		if (!strcmp(name, "objecttype"))
+			v->s = typename(obj->type);
+		else if (!strcmp(name, "objectsize")) {
+			char *s = xmalloc(40);
+			sprintf(s, "%lu", sz);
+			v->ul = sz;
+			v->s = s;
+		}
+		else if (deref)
+			grab_objectname(name, obj->sha1, v);
+	}
+}
+
+/* See grab_values */
+static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
+{
+	int i;
+	struct tag *tag = (struct tag *) obj;
+
+	for (i = 0; i < used_atom_cnt; i++) {
+		const char *name = used_atom[i];
+		struct atom_value *v = &val[i];
+		if (!!deref != (*name == '*'))
+			continue;
+		if (deref)
+			name++;
+		if (!strcmp(name, "tag"))
+			v->s = tag->tag;
+		else if (!strcmp(name, "type") && tag->tagged)
+			v->s = typename(tag->tagged->type);
+		else if (!strcmp(name, "object") && tag->tagged) {
+			char *s = xmalloc(41);
+			strcpy(s, sha1_to_hex(tag->tagged->sha1));
+			v->s = s;
+		}
+	}
+}
+
+/* See grab_values */
+static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
+{
+	int i;
+	struct commit *commit = (struct commit *) obj;
+
+	for (i = 0; i < used_atom_cnt; i++) {
+		const char *name = used_atom[i];
+		struct atom_value *v = &val[i];
+		if (!!deref != (*name == '*'))
+			continue;
+		if (deref)
+			name++;
+		if (!strcmp(name, "tree")) {
+			char *s = xmalloc(41);
+			strcpy(s, sha1_to_hex(commit->tree->object.sha1));
+			v->s = s;
+		}
+		if (!strcmp(name, "numparent")) {
+			char *s = xmalloc(40);
+			v->ul = commit_list_count(commit->parents);
+			sprintf(s, "%lu", v->ul);
+			v->s = s;
+		}
+		else if (!strcmp(name, "parent")) {
+			int num = commit_list_count(commit->parents);
+			int i;
+			struct commit_list *parents;
+			char *s = xmalloc(41 * num + 1);
+			v->s = s;
+			for (i = 0, parents = commit->parents;
+			     parents;
+			     parents = parents->next, i = i + 41) {
+				struct commit *parent = parents->item;
+				strcpy(s+i, sha1_to_hex(parent->object.sha1));
+				if (parents->next)
+					s[i+40] = ' ';
+			}
+			if (!i)
+				*s = '\0';
+		}
+	}
+}
+
+static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
+{
+	const char *eol;
+	while (*buf) {
+		if (!strncmp(buf, who, wholen) &&
+		    buf[wholen] == ' ')
+			return buf + wholen + 1;
+		eol = strchr(buf, '\n');
+		if (!eol)
+			return "";
+		eol++;
+		if (*eol == '\n')
+			return ""; /* end of header */
+		buf = eol;
+	}
+	return "";
+}
+
+static const char *copy_line(const char *buf)
+{
+	const char *eol = strchrnul(buf, '\n');
+	return xmemdupz(buf, eol - buf);
+}
+
+static const char *copy_name(const char *buf)
+{
+	const char *cp;
+	for (cp = buf; *cp && *cp != '\n'; cp++) {
+		if (!strncmp(cp, " <", 2))
+			return xmemdupz(buf, cp - buf);
+	}
+	return "";
+}
+
+static const char *copy_email(const char *buf)
+{
+	const char *email = strchr(buf, '<');
+	const char *eoemail;
+	if (!email)
+		return "";
+	eoemail = strchr(email, '>');
+	if (!eoemail)
+		return "";
+	return xmemdupz(email, eoemail + 1 - email);
+}
+
+static char *copy_subject(const char *buf, unsigned long len)
+{
+	char *r = xmemdupz(buf, len);
+	int i;
+
+	for (i = 0; i < len; i++)
+		if (r[i] == '\n')
+			r[i] = ' ';
+
+	return r;
+}
+
+static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
+{
+	const char *eoemail = strstr(buf, "> ");
+	char *zone;
+	unsigned long timestamp;
+	long tz;
+	enum date_mode date_mode = DATE_NORMAL;
+	const char *formatp;
+
+	/*
+	 * We got here because atomname ends in "date" or "date<something>";
+	 * it's not possible that <something> is not ":<format>" because
+	 * parse_ref_filter_atom() wouldn't have allowed it, so we can assume that no
+	 * ":" means no format is specified, and use the default.
+	 */
+	formatp = strchr(atomname, ':');
+	if (formatp != NULL) {
+		formatp++;
+		date_mode = parse_date_format(formatp);
+	}
+
+	if (!eoemail)
+		goto bad;
+	timestamp = strtoul(eoemail + 2, &zone, 10);
+	if (timestamp == ULONG_MAX)
+		goto bad;
+	tz = strtol(zone, NULL, 10);
+	if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
+		goto bad;
+	v->s = xstrdup(show_date(timestamp, tz, date_mode));
+	v->ul = timestamp;
+	return;
+ bad:
+	v->s = "";
+	v->ul = 0;
+}
+
+/* See grab_values */
+static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
+{
+	int i;
+	int wholen = strlen(who);
+	const char *wholine = NULL;
+
+	for (i = 0; i < used_atom_cnt; i++) {
+		const char *name = used_atom[i];
+		struct atom_value *v = &val[i];
+		if (!!deref != (*name == '*'))
+			continue;
+		if (deref)
+			name++;
+		if (strncmp(who, name, wholen))
+			continue;
+		if (name[wholen] != 0 &&
+		    strcmp(name + wholen, "name") &&
+		    strcmp(name + wholen, "email") &&
+		    !starts_with(name + wholen, "date"))
+			continue;
+		if (!wholine)
+			wholine = find_wholine(who, wholen, buf, sz);
+		if (!wholine)
+			return; /* no point looking for it */
+		if (name[wholen] == 0)
+			v->s = copy_line(wholine);
+		else if (!strcmp(name + wholen, "name"))
+			v->s = copy_name(wholine);
+		else if (!strcmp(name + wholen, "email"))
+			v->s = copy_email(wholine);
+		else if (starts_with(name + wholen, "date"))
+			grab_date(wholine, v, name);
+	}
+
+	/*
+	 * For a tag or a commit object, if "creator" or "creatordate" is
+	 * requested, do something special.
+	 */
+	if (strcmp(who, "tagger") && strcmp(who, "committer"))
+		return; /* "author" for commit object is not wanted */
+	if (!wholine)
+		wholine = find_wholine(who, wholen, buf, sz);
+	if (!wholine)
+		return;
+	for (i = 0; i < used_atom_cnt; i++) {
+		const char *name = used_atom[i];
+		struct atom_value *v = &val[i];
+		if (!!deref != (*name == '*'))
+			continue;
+		if (deref)
+			name++;
+
+		if (starts_with(name, "creatordate"))
+			grab_date(wholine, v, name);
+		else if (!strcmp(name, "creator"))
+			v->s = copy_line(wholine);
+	}
+}
+
+static void find_subpos(const char *buf, unsigned long sz,
+			const char **sub, unsigned long *sublen,
+			const char **body, unsigned long *bodylen,
+			unsigned long *nonsiglen,
+			const char **sig, unsigned long *siglen)
+{
+	const char *eol;
+	/* skip past header until we hit empty line */
+	while (*buf && *buf != '\n') {
+		eol = strchrnul(buf, '\n');
+		if (*eol)
+			eol++;
+		buf = eol;
+	}
+	/* skip any empty lines */
+	while (*buf == '\n')
+		buf++;
+
+	/* parse signature first; we might not even have a subject line */
+	*sig = buf + parse_signature(buf, strlen(buf));
+	*siglen = strlen(*sig);
+
+	/* subject is first non-empty line */
+	*sub = buf;
+	/* subject goes to first empty line */
+	while (buf < *sig && *buf && *buf != '\n') {
+		eol = strchrnul(buf, '\n');
+		if (*eol)
+			eol++;
+		buf = eol;
+	}
+	*sublen = buf - *sub;
+	/* drop trailing newline, if present */
+	if (*sublen && (*sub)[*sublen - 1] == '\n')
+		*sublen -= 1;
+
+	/* skip any empty lines */
+	while (*buf == '\n')
+		buf++;
+	*body = buf;
+	*bodylen = strlen(buf);
+	*nonsiglen = *sig - buf;
+}
+
+/* See grab_values */
+static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
+{
+	int i;
+	const char *subpos = NULL, *bodypos = NULL, *sigpos = NULL;
+	unsigned long sublen = 0, bodylen = 0, nonsiglen = 0, siglen = 0;
+
+	for (i = 0; i < used_atom_cnt; i++) {
+		const char *name = used_atom[i];
+		struct atom_value *v = &val[i];
+		if (!!deref != (*name == '*'))
+			continue;
+		if (deref)
+			name++;
+		if (strcmp(name, "subject") &&
+		    strcmp(name, "body") &&
+		    strcmp(name, "contents") &&
+		    strcmp(name, "contents:subject") &&
+		    strcmp(name, "contents:body") &&
+		    strcmp(name, "contents:signature"))
+			continue;
+		if (!subpos)
+			find_subpos(buf, sz,
+				    &subpos, &sublen,
+				    &bodypos, &bodylen, &nonsiglen,
+				    &sigpos, &siglen);
+
+		if (!strcmp(name, "subject"))
+			v->s = copy_subject(subpos, sublen);
+		else if (!strcmp(name, "contents:subject"))
+			v->s = copy_subject(subpos, sublen);
+		else if (!strcmp(name, "body"))
+			v->s = xmemdupz(bodypos, bodylen);
+		else if (!strcmp(name, "contents:body"))
+			v->s = xmemdupz(bodypos, nonsiglen);
+		else if (!strcmp(name, "contents:signature"))
+			v->s = xmemdupz(sigpos, siglen);
+		else if (!strcmp(name, "contents"))
+			v->s = xstrdup(subpos);
+	}
+}
+
+/*
+ * We want to have empty print-string for field requests
+ * that do not apply (e.g. "authordate" for a tag object)
+ */
+static void fill_missing_values(struct atom_value *val)
+{
+	int i;
+	for (i = 0; i < used_atom_cnt; i++) {
+		struct atom_value *v = &val[i];
+		if (v->s == NULL)
+			v->s = "";
+	}
+}
+
+/*
+ * val is a list of atom_value to hold returned values.  Extract
+ * the values for atoms in used_atom array out of (obj, buf, sz).
+ * when deref is false, (obj, buf, sz) is the object that is
+ * pointed at by the ref itself; otherwise it is the object the
+ * ref (which is a tag) refers to.
+ */
+static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
+{
+	grab_common_values(val, deref, obj, buf, sz);
+	switch (obj->type) {
+	case OBJ_TAG:
+		grab_tag_values(val, deref, obj, buf, sz);
+		grab_sub_body_contents(val, deref, obj, buf, sz);
+		grab_person("tagger", val, deref, obj, buf, sz);
+		break;
+	case OBJ_COMMIT:
+		grab_commit_values(val, deref, obj, buf, sz);
+		grab_sub_body_contents(val, deref, obj, buf, sz);
+		grab_person("author", val, deref, obj, buf, sz);
+		grab_person("committer", val, deref, obj, buf, sz);
+		break;
+	case OBJ_TREE:
+		/* grab_tree_values(val, deref, obj, buf, sz); */
+		break;
+	case OBJ_BLOB:
+		/* grab_blob_values(val, deref, obj, buf, sz); */
+		break;
+	default:
+		die("Eh?  Object of type %d?", obj->type);
+	}
+}
+
+static inline char *copy_advance(char *dst, const char *src)
+{
+	while (*src)
+		*dst++ = *src++;
+	return dst;
+}
+
+/*
+ * Parse the object referred by ref, and grab needed value.
+ */
+static void populate_value(struct ref_array_item *ref)
+{
+	void *buf;
+	struct object *obj;
+	int eaten, i;
+	unsigned long size;
+	const unsigned char *tagged;
+
+	ref->value = xcalloc(used_atom_cnt, sizeof(struct atom_value));
+
+	if (need_symref && (ref->flag & REF_ISSYMREF) && !ref->symref) {
+		unsigned char unused1[20];
+		ref->symref = resolve_refdup(ref->refname, RESOLVE_REF_READING,
+					     unused1, NULL);
+		if (!ref->symref)
+			ref->symref = "";
+	}
+
+	/* Fill in specials first */
+	for (i = 0; i < used_atom_cnt; i++) {
+		const char *name = used_atom[i];
+		struct atom_value *v = &ref->value[i];
+		int deref = 0;
+		const char *refname;
+		const char *formatp;
+		struct branch *branch = NULL;
+
+		if (*name == '*') {
+			deref = 1;
+			name++;
+		}
+
+		if (starts_with(name, "refname"))
+			refname = ref->refname;
+		else if (starts_with(name, "symref"))
+			refname = ref->symref ? ref->symref : "";
+		else if (starts_with(name, "upstream")) {
+			/* only local branches may have an upstream */
+			if (!starts_with(ref->refname, "refs/heads/"))
+				continue;
+			branch = branch_get(ref->refname + 11);
+
+			if (!branch || !branch->merge || !branch->merge[0] ||
+			    !branch->merge[0]->dst)
+				continue;
+			refname = branch->merge[0]->dst;
+		} else if (starts_with(name, "color:")) {
+			char color[COLOR_MAXLEN] = "";
+
+			if (color_parse(name + 6, color) < 0)
+				die(_("unable to parse format"));
+			v->s = xstrdup(color);
+			continue;
+		} else if (!strcmp(name, "flag")) {
+			char buf[256], *cp = buf;
+			if (ref->flag & REF_ISSYMREF)
+				cp = copy_advance(cp, ",symref");
+			if (ref->flag & REF_ISPACKED)
+				cp = copy_advance(cp, ",packed");
+			if (cp == buf)
+				v->s = "";
+			else {
+				*cp = '\0';
+				v->s = xstrdup(buf + 1);
+			}
+			continue;
+		} else if (!deref && grab_objectname(name, ref->objectname, v)) {
+			continue;
+		} else if (!strcmp(name, "HEAD")) {
+			const char *head;
+			unsigned char sha1[20];
+
+			head = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
+						  sha1, NULL);
+			if (!strcmp(ref->refname, head))
+				v->s = "*";
+			else
+				v->s = " ";
+			continue;
+		} else
+			continue;
+
+		formatp = strchr(name, ':');
+		if (formatp) {
+			int num_ours, num_theirs;
+
+			formatp++;
+			if (!strcmp(formatp, "short"))
+				refname = shorten_unambiguous_ref(refname,
+						      warn_ambiguous_refs);
+			else if (!strcmp(formatp, "track") &&
+				 starts_with(name, "upstream")) {
+				char buf[40];
+
+				if (stat_tracking_info(branch, &num_ours,
+						       &num_theirs) != 1)
+					continue;
+
+				if (!num_ours && !num_theirs)
+					v->s = "";
+				else if (!num_ours) {
+					sprintf(buf, "[behind %d]", num_theirs);
+					v->s = xstrdup(buf);
+				} else if (!num_theirs) {
+					sprintf(buf, "[ahead %d]", num_ours);
+					v->s = xstrdup(buf);
+				} else {
+					sprintf(buf, "[ahead %d, behind %d]",
+						num_ours, num_theirs);
+					v->s = xstrdup(buf);
+				}
+				continue;
+			} else if (!strcmp(formatp, "trackshort") &&
+				   starts_with(name, "upstream")) {
+				assert(branch);
+
+				if (stat_tracking_info(branch, &num_ours,
+							&num_theirs) != 1)
+					continue;
+
+				if (!num_ours && !num_theirs)
+					v->s = "=";
+				else if (!num_ours)
+					v->s = "<";
+				else if (!num_theirs)
+					v->s = ">";
+				else
+					v->s = "<>";
+				continue;
+			} else
+				die("unknown %.*s format %s",
+				    (int)(formatp - name), name, formatp);
+		}
+
+		if (!deref)
+			v->s = refname;
+		else {
+			int len = strlen(refname);
+			char *s = xmalloc(len + 4);
+			sprintf(s, "%s^{}", refname);
+			v->s = s;
+		}
+	}
+
+	for (i = 0; i < used_atom_cnt; i++) {
+		struct atom_value *v = &ref->value[i];
+		if (v->s == NULL)
+			goto need_obj;
+	}
+	return;
+
+ need_obj:
+	buf = get_obj(ref->objectname, &obj, &size, &eaten);
+	if (!buf)
+		die("missing object %s for %s",
+		    sha1_to_hex(ref->objectname), ref->refname);
+	if (!obj)
+		die("parse_object_buffer failed on %s for %s",
+		    sha1_to_hex(ref->objectname), ref->refname);
+
+	grab_values(ref->value, 0, obj, buf, size);
+	if (!eaten)
+		free(buf);
+
+	/*
+	 * If there is no atom that wants to know about tagged
+	 * object, we are done.
+	 */
+	if (!need_tagged || (obj->type != OBJ_TAG))
+		return;
+
+	/*
+	 * If it is a tag object, see if we use a value that derefs
+	 * the object, and if we do grab the object it refers to.
+	 */
+	tagged = ((struct tag *)obj)->tagged->sha1;
+
+	/*
+	 * NEEDSWORK: This derefs tag only once, which
+	 * is good to deal with chains of trust, but
+	 * is not consistent with what deref_tag() does
+	 * which peels the onion to the core.
+	 */
+	buf = get_obj(tagged, &obj, &size, &eaten);
+	if (!buf)
+		die("missing object %s for %s",
+		    sha1_to_hex(tagged), ref->refname);
+	if (!obj)
+		die("parse_object_buffer failed on %s for %s",
+		    sha1_to_hex(tagged), ref->refname);
+	grab_values(ref->value, 1, obj, buf, size);
+	if (!eaten)
+		free(buf);
+}
+
+/*
+ * Given a ref, return the value for the atom.  This lazily gets value
+ * out of the object by calling populate value.
+ */
+static void get_ref_atom_value(struct ref_array_item *ref, int atom, struct atom_value **v)
+{
+	if (!ref->value) {
+		populate_value(ref);
+		fill_missing_values(ref->value);
+	}
+	*v = &ref->value[atom];
+}
+
+/*
+ * Given a refname, return 1 if the refname matches with one of the patterns
+ * while the pattern is a pathname like 'refs/tags' or 'refs/heads/master'
+ * and so on, else return 0. Supports use of wild characters.
+ */
+static int match_name_as_path(const char **pattern, const char *refname)
+{
+	int namelen = strlen(refname);
+	for (; *pattern; pattern++) {
+		const char *p = *pattern;
+		int plen = strlen(p);
+
+		if ((plen <= namelen) &&
+		    !strncmp(refname, p, plen) &&
+		    (refname[plen] == '\0' ||
+		     refname[plen] == '/' ||
+		     p[plen-1] == '/'))
+			return 1;
+		if (!wildmatch(p, refname, WM_PATHNAME, NULL))
+			return 1;
+	}
+	return 0;
+}
+
+/* Allocate space for a new ref_array_item and copy the objectname and flag to it */
+static struct ref_array_item *new_ref_array_item(const char *refname,
+						 const unsigned char *objectname,
+						 int flag)
+{
+	struct ref_array_item *ref = xcalloc(1, sizeof(struct ref_array_item));
+	ref->refname = xstrdup(refname);
+	hashcpy(ref->objectname, objectname);
+	ref->flag = flag;
+
+	return ref;
+}
+
+/*
+ * A call-back given to for_each_ref().  Filter refs and keep them for
+ * later object processing.
+ */
+int ref_filter_handler(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
+{
+	struct ref_filter_cbdata *ref_cbdata = cb_data;
+	struct ref_filter *filter = &ref_cbdata->filter;
+	struct ref_array_item *ref;
+
+	if (flag & REF_BAD_NAME) {
+		  warning("ignoring ref with broken name %s", refname);
+		  return 0;
+	}
+
+	if (*filter->name_patterns && !match_name_as_path(filter->name_patterns, refname))
+		return 0;
+
+	/*
+	 * We do not open the object yet; sort may only need refname
+	 * to do its job and the resulting list may yet to be pruned
+	 * by maxcount logic.
+	 */
+	ref = new_ref_array_item(refname, sha1, flag);
+
+	REALLOC_ARRAY(ref_cbdata->array.items, ref_cbdata->array.nr + 1);
+	ref_cbdata->array.items[ref_cbdata->array.nr++] = ref;
+	return 0;
+}
+
+/*  Free memory allocated for a ref_array_item */
+static void free_array_item(struct ref_array_item *item)
+{
+	free(item->symref);
+	free(item->refname);
+	free(item);
+}
+
+/* Free all memory allocated for ref_array */
+void ref_array_clear(struct ref_array *array)
+{
+	int i;
+
+	for (i = 0; i < array->nr; i++)
+		free_array_item(array->items[i]);
+	free(array->items);
+	array->items = NULL;
+	array->nr = array->alloc = 0;
+}
+
+static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, struct ref_array_item *b)
+{
+	struct atom_value *va, *vb;
+	int cmp;
+	cmp_type cmp_type = used_atom_type[s->atom];
+
+	get_ref_atom_value(a, s->atom, &va);
+	get_ref_atom_value(b, s->atom, &vb);
+	switch (cmp_type) {
+	case FIELD_STR:
+		cmp = strcmp(va->s, vb->s);
+		break;
+	default:
+		if (va->ul < vb->ul)
+			cmp = -1;
+		else if (va->ul == vb->ul)
+			cmp = 0;
+		else
+			cmp = 1;
+		break;
+	}
+	return (s->reverse) ? -cmp : cmp;
+}
+
+static struct ref_sorting *ref_sorting;
+static int compare_refs(const void *a_, const void *b_)
+{
+	struct ref_array_item *a = *((struct ref_array_item **)a_);
+	struct ref_array_item *b = *((struct ref_array_item **)b_);
+	struct ref_sorting *s;
+
+	for (s = ref_sorting; s; s = s->next) {
+		int cmp = cmp_ref_sorting(s, a, b);
+		if (cmp)
+			return cmp;
+	}
+	return 0;
+}
+
+void ref_array_sort(struct ref_sorting *sort, struct ref_array *array)
+{
+	ref_sorting = sort;
+	qsort(array->items, array->nr, sizeof(struct ref_array_item *), compare_refs);
+}
+
+static void print_value(struct atom_value *v, int quote_style)
+{
+	struct strbuf sb = STRBUF_INIT;
+	switch (quote_style) {
+	case QUOTE_NONE:
+		fputs(v->s, stdout);
+		break;
+	case QUOTE_SHELL:
+		sq_quote_buf(&sb, v->s);
+		break;
+	case QUOTE_PERL:
+		perl_quote_buf(&sb, v->s);
+		break;
+	case QUOTE_PYTHON:
+		python_quote_buf(&sb, v->s);
+		break;
+	case QUOTE_TCL:
+		tcl_quote_buf(&sb, v->s);
+		break;
+	}
+	if (quote_style != QUOTE_NONE) {
+		fputs(sb.buf, stdout);
+		strbuf_release(&sb);
+	}
+}
+
+static int hex1(char ch)
+{
+	if ('0' <= ch && ch <= '9')
+		return ch - '0';
+	else if ('a' <= ch && ch <= 'f')
+		return ch - 'a' + 10;
+	else if ('A' <= ch && ch <= 'F')
+		return ch - 'A' + 10;
+	return -1;
+}
+static int hex2(const char *cp)
+{
+	if (cp[0] && cp[1])
+		return (hex1(cp[0]) << 4) | hex1(cp[1]);
+	else
+		return -1;
+}
+
+static void emit(const char *cp, const char *ep)
+{
+	while (*cp && (!ep || cp < ep)) {
+		if (*cp == '%') {
+			if (cp[1] == '%')
+				cp++;
+			else {
+				int ch = hex2(cp + 1);
+				if (0 <= ch) {
+					putchar(ch);
+					cp += 3;
+					continue;
+				}
+			}
+		}
+		putchar(*cp);
+		cp++;
+	}
+}
+
+void show_ref_array_item(struct ref_array_item *info, const char *format, int quote_style)
+{
+	const char *cp, *sp, *ep;
+
+	for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
+		struct atom_value *atomv;
+
+		ep = strchr(sp, ')');
+		if (cp < sp)
+			emit(cp, sp);
+		get_ref_atom_value(info, parse_ref_filter_atom(sp + 2, ep), &atomv);
+		print_value(atomv, quote_style);
+	}
+	if (*cp) {
+		sp = cp + strlen(cp);
+		emit(cp, sp);
+	}
+	if (need_color_reset_at_eol) {
+		struct atom_value resetv;
+		char color[COLOR_MAXLEN] = "";
+
+		if (color_parse("reset", color) < 0)
+			die("BUG: couldn't parse 'reset' as a color");
+		resetv.s = color;
+		print_value(&resetv, quote_style);
+	}
+	putchar('\n');
+}
+
+/*  If no sorting option is given, use refname to sort as default */
+struct ref_sorting *ref_default_sorting(void)
+{
+	static const char cstr_name[] = "refname";
+
+	struct ref_sorting *sort = xcalloc(1, sizeof(*sort));
+
+	sort->next = NULL;
+	sort->atom = parse_ref_filter_atom(cstr_name, cstr_name + strlen(cstr_name));
+	return sort;
+}
+
+int parse_opt_ref_sorting(const struct option *opt, const char *arg, int unset)
+{
+	struct ref_sorting **sort_tail = opt->value;
+	struct ref_sorting *s;
+	int len;
+
+	if (!arg) /* should --no-sort void the list ? */
+		return -1;
+
+	s = xcalloc(1, sizeof(*s));
+	s->next = *sort_tail;
+	*sort_tail = s;
+
+	if (*arg == '-') {
+		s->reverse = 1;
+		arg++;
+	}
+	len = strlen(arg);
+	s->atom = parse_ref_filter_atom(arg, arg+len);
+	return 0;
+}
-- 
2.4.2

[WIP/PATCH v5 09/10] for-each-ref: introduce filter_refs()

[Karthik Nayak]

Introduce filter_refs() which will act as an API for users to
call and provide a function which will iterate over a set of refs
while filtering out the required refs.

Currently this will wrap around ref_filter_handler(). Hence,
ref_filter_handler is made file scope static.

Helped-by: Junio C Hamano <gitster@pobox.com>
Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 builtin/for-each-ref.c |  2 +-
 ref-filter.c           | 12 +++++++++++-
 ref-filter.h           |  8 ++++++--
 3 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index e237194..2a16947 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -56,7 +56,7 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 
 	memset(&ref_cbdata, 0, sizeof(ref_cbdata));
 	ref_cbdata.filter.name_patterns = argv;
-	for_each_rawref(ref_filter_handler, &ref_cbdata);
+	filter_refs(for_each_rawref, &ref_cbdata);
 
 	ref_array_sort(sort, &ref_cbdata.array);
 
diff --git a/ref-filter.c b/ref-filter.c
index 95e72f6..c32b86f 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -843,7 +843,7 @@ static struct ref_array_item *new_ref_array_item(const char *refname,
  * A call-back given to for_each_ref().  Filter refs and keep them for
  * later object processing.
  */
-int ref_filter_handler(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
+static int ref_filter_handler(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 {
 	struct ref_filter_cbdata *ref_cbdata = cb_data;
 	struct ref_filter *filter = &ref_cbdata->filter;
@@ -889,6 +889,16 @@ void ref_array_clear(struct ref_array *array)
 	array->nr = array->alloc = 0;
 }
 
+/*
+ * API for filtering a set of refs. The refs are provided and iterated
+ * over using the for_each_ref_fn(). The refs are stored into and filtered
+ * based on the ref_filter_cbdata structure.
+ */
+int filter_refs(int (for_each_ref_fn)(each_ref_fn, void *), struct ref_filter_cbdata *data)
+{
+	return for_each_ref_fn(ref_filter_handler, data);
+}
+
 static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, struct ref_array_item *b)
 {
 	struct atom_value *va, *vb;
diff --git a/ref-filter.h b/ref-filter.h
index 1432ff6..15e6766 100644
--- a/ref-filter.h
+++ b/ref-filter.h
@@ -46,8 +46,12 @@ struct ref_filter_cbdata {
 	struct ref_filter filter;
 };
 
-/*  Callback function for for_each_*ref(). This filters the refs based on the filters set */
-int ref_filter_handler(const char *refname, const unsigned char *sha1, int flag, void *cb_data);
+/*
+ * API for filtering a set of refs. The refs are provided and iterated
+ * over using the for_each_ref_fn(). The refs are stored into and filtered
+ * based on the ref_filter_cbdata structure.
+ */
+int filter_refs(int (for_each_ref_fn)(each_ref_fn, void *), struct ref_filter_cbdata *data);
 /*  Clear all memory allocated to ref_array */
 void ref_array_clear(struct ref_array *array);
 /*  Parse format string and sort specifiers */
-- 
2.4.2

[WIP/PATCH v5 10/10] ref-filter: make 'ref_array_item' use a FLEX_ARRAY for refname

[Karthik Nayak]

This would remove the need of using a pointer to store refname.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 ref-filter.c | 7 ++++---
 ref-filter.h | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/ref-filter.c b/ref-filter.c
index c32b86f..1bd1a28 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -831,8 +831,10 @@ static struct ref_array_item *new_ref_array_item(const char *refname,
 						 const unsigned char *objectname,
 						 int flag)
 {
-	struct ref_array_item *ref = xcalloc(1, sizeof(struct ref_array_item));
-	ref->refname = xstrdup(refname);
+	size_t len = strlen(refname);
+	struct ref_array_item *ref = xcalloc(1, sizeof(struct ref_array_item) + len + 1);
+	memcpy(ref->refname, refname, len);
+	ref->refname[len] = '\0';
 	hashcpy(ref->objectname, objectname);
 	ref->flag = flag;
 
@@ -873,7 +875,6 @@ static int ref_filter_handler(const char *refname, const unsigned char *sha1, in
 static void free_array_item(struct ref_array_item *item)
 {
 	free(item->symref);
-	free(item->refname);
 	free(item);
 }
 
diff --git a/ref-filter.h b/ref-filter.h
index 15e6766..041a39a 100644
--- a/ref-filter.h
+++ b/ref-filter.h
@@ -29,7 +29,7 @@ struct ref_array_item {
 	int flag;
 	char *symref;
 	struct atom_value *value;
-	char *refname;
+	char refname[FLEX_ARRAY];
 };
 
 struct ref_array {
-- 
2.4.2

Re: [WIP/PATCH v5 0/10] create ref-filter from for-each-ref

[Christian Couder]

On Sat, Jun 6, 2015 at 9:04 AM, Karthik Nayak <karthik.188@gmail.com> wrote:
> Version for of this patch can be found here :
> http://www.mail-archive.com/git@vger.kernel.org/msg70280.html
>
> Changes in this version:
> *       Rename functions to better suit the code.
> *       implement filter_refs()
> *       use FLEX_ARRAY for refname
> *       other small changes

Now that the patch series starts to be in a good shape you might want
to use [PATCH ...] instead of [WIP/PATCH ...].

Thanks,
Christian.

Re: [WIP/PATCH v5 0/10] create ref-filter from for-each-ref

[Karthik Nayak]

On 06/06/2015 03:10 PM, Christian Couder wrote:
> On Sat, Jun 6, 2015 at 9:04 AM, Karthik Nayak <karthik.188@gmail.com> wrote:
> > Version for of this patch can be found here :
> > http://www.mail-archive.com/git@vger.kernel.org/msg70280.html
> >
> > Changes in this version:
> > *       Rename functions to better suit the code.
> > *       implement filter_refs()
> > *       use FLEX_ARRAY for refname
> > *       other small changes
>
> Now that the patch series starts to be in a good shape you might want
> to use [PATCH ...] instead of [WIP/PATCH ...].
>
> Thanks,
> Christian.
>
Good point! I should have done that.

-- 
Regards,
Karthik

Re: [WIP/PATCH v5 0/10] create ref-filter from for-each-ref

[Karthik Nayak]

On 06/06/2015 12:34 PM, Karthik Nayak wrote:
> Version for of this patch can be found here :
> http://www.mail-archive.com/git@vger.kernel.org/msg70280.html
>
> Changes in this version:
> *    Rename functions to better suit the code.
> *    implement filter_refs()
> *    use FLEX_ARRAY for refname
> *    other small changes

I request that this series be ignored, will push again. I hadn't rebased 
on master (latest), there'll be merge conflicts.
Sorry for the inconvenience.

-- 
Regards,
Karthik