[PATCH v2 00/11] git_config callers rewritten with the new config-set API

[PATCH v2 00/11] git_config callers rewritten with the new config-set API

[Tanay Abhra]

[v2]: git_die_config() messages changed. Diff between v1 and v2 is at the bottom.

The ta/config-set API is more or less solidified.

This series builds on the top of 4c715ebb in pu (ta/config-set). On top of it,
it also requires series [1] (Rewrite `git_config()` using config-set API) for
proper error checking.

This series is the first batch of patches which rewrites the existing callers
using a non-callback approach.
This series aims to,

* rewrite the existing callers, as you can see from the diff stat the bew API
  provides a much concise and clear control flow.

* stress test the new API, see if any corner cases or deficiencies arise or not.

The series passes all the tests, only thing to watch is that the config variables
that have been rewritten are single valued only. Though I have tried my best to
ascertain it, still mistakes may arise.

[1]: http://thread.gmane.org/gmane.comp.version-control.git/254633/

Tanay Abhra (11):
  daemon.c: replace `git_config()` with `git_config_get_bool()` family
  http-backend.c: replace `git_config()` with `git_config_get_bool()`
    family
  read-cache.c: replace `git_config()` with `git_config_get_*()` family
  archive.c: replace `git_config()` with `git_config_get_bool()` family
  fetchpack.c: replace `git_config()` with `git_config_get_*()` family
  rerere.c: replace `git_config()` with `git_config_get_*()` family
  builtin/gc.c: replace `git_config()` with `git_config_get_*()` family
  pager.c: replace `git_config()` with `git_config_get_value()`
  imap-send.c: replace `git_config()` with `git_config_get_*()` family
  alias.c: replace `git_config()` with `git_config_get_string()`
  branch.c: replace `git_config()` with `git_config_get_string()

 alias.c        | 25 ++++++------------------
 archive.c      | 12 +++---------
 branch.c       | 27 +++++++-------------------
 builtin/gc.c   | 51 ++++++++++++++++++++-----------------------------
 daemon.c       | 26 ++++---------------------
 fetch-pack.c   | 35 ++++++++--------------------------
 http-backend.c | 31 ++++++++++++------------------
 imap-send.c    | 60 +++++++++++++++++++++++++---------------------------------
 pager.c        | 40 +++++++++++++--------------------------
 read-cache.c   | 14 +++-----------
 rerere.c       | 43 ++++++++++++-----------------------------
 11 files changed, 114 insertions(+), 250 deletions(-)

-- 
1.9.0.GIT


-- 8< --
diff --git a/builtin/gc.c b/builtin/gc.c
index 4612ef5..5173657 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -76,8 +76,8 @@ static void gc_config(void)
    if (strcmp(prune_expire, "now")) {
      unsigned long now = approxidate("now");
      if (approxidate(prune_expire) >= now) {
-       error(_("Invalid %s: '%s'"), "gc.pruneexpire", prune_expire);
-       git_die_config("gc.pruneexpire");
+       git_die_config("gc.pruneexpire", _("Invalid gc.pruneexpire: '%s'"),
+                       prune_expire);
      }
    }
  }


diff --git a/daemon.c b/daemon.c
index fb16664..6f78b61 100644
--- a/daemon.c
+++ b/daemon.c
@@ -342,7 +342,6 @@ static int run_service(const char *dir, struct daemon_service *service)
    git_config_get_bool(var.buf, &enabled);
    strbuf_release(&var);
  }
-
  if (!enabled) {
    logerror("'%s': service not enabled for '%s'",
       service->name, path);
diff --git a/imap-send.c b/imap-send.c
index 586bdd8..618d75b 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -1336,8 +1336,7 @@ static void git_imap_config(void)
 
  if (!git_config_get_value("imap.host", &val)) {
    if (!val) {
-     config_error_nonbool("imap.host");
-     git_die_config("imap.host");
+     git_die_config("imap.host", "Missing value for 'imap.host'");
    } else {
      if (starts_with(val, "imap:"))
  val += 5;
-- 8< --

[PATCH v2 01/11] daemon.c: replace `git_config()` with `git_config_get_bool()` family

[Tanay Abhra]

Use `git_config_get_bool()` family instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 daemon.c | 26 ++++----------------------
 1 file changed, 4 insertions(+), 22 deletions(-)

diff --git a/daemon.c b/daemon.c
index e6b51ed..6f78b61 100644
--- a/daemon.c
+++ b/daemon.c
@@ -230,23 +230,6 @@ struct daemon_service {
 	int overridable;
 };
 
-static struct daemon_service *service_looking_at;
-static int service_enabled;
-
-static int git_daemon_config(const char *var, const char *value, void *cb)
-{
-	const char *service;
-
-	if (skip_prefix(var, "daemon.", &service) &&
-	    !strcmp(service, service_looking_at->config_name)) {
-		service_enabled = git_config_bool(var, value);
-		return 0;
-	}
-
-	/* we are not interested in parsing any other configuration here */
-	return 0;
-}
-
 static int daemon_error(const char *dir, const char *msg)
 {
 	if (!informative_errors)
@@ -324,6 +307,7 @@ static int run_service(const char *dir, struct daemon_service *service)
 {
 	const char *path;
 	int enabled = service->enabled;
+	struct strbuf var = STRBUF_INIT;
 
 	loginfo("Request %s for '%s'", service->name, dir);
 
@@ -354,11 +338,9 @@ static int run_service(const char *dir, struct daemon_service *service)
 	}
 
 	if (service->overridable) {
-		service_looking_at = service;
-		service_enabled = -1;
-		git_config(git_daemon_config, NULL);
-		if (0 <= service_enabled)
-			enabled = service_enabled;
+		strbuf_addf(&var, "daemon.%s", service->config_name);
+		git_config_get_bool(var.buf, &enabled);
+		strbuf_release(&var);
 	}
 	if (!enabled) {
 		logerror("'%s': service not enabled for '%s'",
-- 
1.9.0.GIT

[PATCH v2 02/11] http-backend.c: replace `git_config()` with `git_config_get_bool()` family

[Tanay Abhra]

Use `git_config_get_bool()` family instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 http-backend.c | 31 ++++++++++++-------------------
 1 file changed, 12 insertions(+), 19 deletions(-)

diff --git a/http-backend.c b/http-backend.c
index 80790bb..106ca6b 100644
--- a/http-backend.c
+++ b/http-backend.c
@@ -219,29 +219,22 @@ static void get_idx_file(char *name)
 	send_local_file("application/x-git-packed-objects-toc", name);
 }
 
-static int http_config(const char *var, const char *value, void *cb)
+static void http_config(void)
 {
-	const char *p;
+	int i, value = 0;
+	struct strbuf var = STRBUF_INIT;
 
-	if (!strcmp(var, "http.getanyfile")) {
-		getanyfile = git_config_bool(var, value);
-		return 0;
-	}
+	git_config_get_bool("http.getanyfile", &getanyfile);
 
-	if (skip_prefix(var, "http.", &p)) {
-		int i;
-
-		for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
-			struct rpc_service *svc = &rpc_service[i];
-			if (!strcmp(p, svc->config_name)) {
-				svc->enabled = git_config_bool(var, value);
-				return 0;
-			}
-		}
+	for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
+		struct rpc_service *svc = &rpc_service[i];
+		strbuf_addf(&var, "http.%s", svc->config_name);
+		if (!git_config_get_bool(var.buf, &value))
+			svc->enabled = value;
+		strbuf_reset(&var);
 	}
 
-	/* we are not interested in parsing any other configuration here */
-	return 0;
+	strbuf_release(&var);
 }
 
 static struct rpc_service *select_service(const char *name)
@@ -627,7 +620,7 @@ int main(int argc, char **argv)
 	    access("git-daemon-export-ok", F_OK) )
 		not_found("Repository not exported: '%s'", dir);
 
-	git_config(http_config, NULL);
+	http_config();
 	cmd->imp(cmd_arg);
 	return 0;
 }
-- 
1.9.0.GIT

[PATCH v2 03/11] read-cache.c: replace `git_config()` with `git_config_get_*()` family

[Tanay Abhra]

Use `git_config_get_*()` family instead of `git_config()` to take
advantage of the config-set API which provides a cleaner control flow.

Use an intermediate value, as `version` can not be used directly in
git_config_get_int() due to incompatible type.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 read-cache.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/read-cache.c b/read-cache.c
index 5d3c8bd..acb132d 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1238,24 +1238,16 @@ static struct cache_entry *refresh_cache_entry(struct cache_entry *ce,
 
 #define INDEX_FORMAT_DEFAULT 3
 
-static int index_format_config(const char *var, const char *value, void *cb)
-{
-	unsigned int *version = cb;
-	if (!strcmp(var, "index.version")) {
-		*version = git_config_int(var, value);
-		return 0;
-	}
-	return 1;
-}
-
 static unsigned int get_index_format_default(void)
 {
 	char *envversion = getenv("GIT_INDEX_VERSION");
 	char *endp;
+	int value;
 	unsigned int version = INDEX_FORMAT_DEFAULT;
 
 	if (!envversion) {
-		git_config(index_format_config, &version);
+		if (!git_config_get_int("index.version", &value))
+			version = value;
 		if (version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < version) {
 			warning(_("index.version set, but the value is invalid.\n"
 				  "Using version %i"), INDEX_FORMAT_DEFAULT);
-- 
1.9.0.GIT

[PATCH v2 04/11] archive.c: replace `git_config()` with `git_config_get_bool()` family

[Tanay Abhra]

Use `git_config_get_bool()` family instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 archive.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/archive.c b/archive.c
index 3fc0fb2..952a659 100644
--- a/archive.c
+++ b/archive.c
@@ -402,14 +402,6 @@ static int parse_archive_args(int argc, const char **argv,
 	return argc;
 }
 
-static int git_default_archive_config(const char *var, const char *value,
-				      void *cb)
-{
-	if (!strcmp(var, "uploadarchive.allowunreachable"))
-		remote_allow_unreachable = git_config_bool(var, value);
-	return git_default_config(var, value, cb);
-}
-
 int write_archive(int argc, const char **argv, const char *prefix,
 		  int setup_prefix, const char *name_hint, int remote)
 {
@@ -420,7 +412,9 @@ int write_archive(int argc, const char **argv, const char *prefix,
 	if (setup_prefix && prefix == NULL)
 		prefix = setup_git_directory_gently(&nongit);
 
-	git_config(git_default_archive_config, NULL);
+	git_config_get_bool("uploadarchive.allowunreachable", &remote_allow_unreachable);
+	git_config(git_default_config, NULL);
+
 	init_tar_archiver();
 	init_zip_archiver();
 
-- 
1.9.0.GIT

[PATCH v2 05/11] fetchpack.c: replace `git_config()` with `git_config_get_*()` family

[Tanay Abhra]

Use `git_config_get_*()` family instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 fetch-pack.c | 35 ++++++++---------------------------
 1 file changed, 8 insertions(+), 27 deletions(-)

diff --git a/fetch-pack.c b/fetch-pack.c
index b8a58fa..a13e9db 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -869,34 +869,15 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args,
 	return ref;
 }
 
-static int fetch_pack_config(const char *var, const char *value, void *cb)
+static void fetch_pack_config(void)
 {
-	if (strcmp(var, "fetch.unpacklimit") == 0) {
-		fetch_unpack_limit = git_config_int(var, value);
-		return 0;
-	}
-
-	if (strcmp(var, "transfer.unpacklimit") == 0) {
-		transfer_unpack_limit = git_config_int(var, value);
-		return 0;
-	}
-
-	if (strcmp(var, "repack.usedeltabaseoffset") == 0) {
-		prefer_ofs_delta = git_config_bool(var, value);
-		return 0;
-	}
-
-	if (!strcmp(var, "fetch.fsckobjects")) {
-		fetch_fsck_objects = git_config_bool(var, value);
-		return 0;
-	}
-
-	if (!strcmp(var, "transfer.fsckobjects")) {
-		transfer_fsck_objects = git_config_bool(var, value);
-		return 0;
-	}
+	git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit);
+	git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit);
+	git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta);
+	git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects);
+	git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects);
 
-	return git_default_config(var, value, cb);
+	git_config(git_default_config, NULL);
 }
 
 static void fetch_pack_setup(void)
@@ -904,7 +885,7 @@ static void fetch_pack_setup(void)
 	static int did_setup;
 	if (did_setup)
 		return;
-	git_config(fetch_pack_config, NULL);
+	fetch_pack_config();
 	if (0 <= transfer_unpack_limit)
 		unpack_limit = transfer_unpack_limit;
 	else if (0 <= fetch_unpack_limit)
-- 
1.9.0.GIT

[PATCH v2 06/11] rerere.c: replace `git_config()` with `git_config_get_*()` family

[Tanay Abhra]

Use `git_config_get_*()` family instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 rerere.c | 43 ++++++++++++-------------------------------
 1 file changed, 12 insertions(+), 31 deletions(-)

diff --git a/rerere.c b/rerere.c
index d84b495..20b18ad 100644
--- a/rerere.c
+++ b/rerere.c
@@ -573,15 +573,11 @@ static int do_plain_rerere(struct string_list *rr, int fd)
 	return write_rr(rr, fd);
 }
 
-static int git_rerere_config(const char *var, const char *value, void *cb)
+static void git_rerere_config(void)
 {
-	if (!strcmp(var, "rerere.enabled"))
-		rerere_enabled = git_config_bool(var, value);
-	else if (!strcmp(var, "rerere.autoupdate"))
-		rerere_autoupdate = git_config_bool(var, value);
-	else
-		return git_default_config(var, value, cb);
-	return 0;
+	git_config_get_bool("rerere.enabled", &rerere_enabled);
+	git_config_get_bool("rerere.autoupdate", &rerere_autoupdate);
+	git_config(git_default_config, NULL);
 }
 
 static int is_rerere_enabled(void)
@@ -606,7 +602,7 @@ int setup_rerere(struct string_list *merge_rr, int flags)
 {
 	int fd;
 
-	git_config(git_rerere_config, NULL);
+	git_rerere_config();
 	if (!is_rerere_enabled())
 		return -1;
 
@@ -699,24 +695,6 @@ static void unlink_rr_item(const char *name)
 	rmdir(git_path("rr-cache/%s", name));
 }
 
-struct rerere_gc_config_cb {
-	int cutoff_noresolve;
-	int cutoff_resolve;
-};
-
-static int git_rerere_gc_config(const char *var, const char *value, void *cb)
-{
-	struct rerere_gc_config_cb *cf = cb;
-
-	if (!strcmp(var, "gc.rerereresolved"))
-		cf->cutoff_resolve = git_config_int(var, value);
-	else if (!strcmp(var, "gc.rerereunresolved"))
-		cf->cutoff_noresolve = git_config_int(var, value);
-	else
-		return git_default_config(var, value, cb);
-	return 0;
-}
-
 void rerere_gc(struct string_list *rr)
 {
 	struct string_list to_remove = STRING_LIST_INIT_DUP;
@@ -724,9 +702,12 @@ void rerere_gc(struct string_list *rr)
 	struct dirent *e;
 	int i, cutoff;
 	time_t now = time(NULL), then;
-	struct rerere_gc_config_cb cf = { 15, 60 };
+	int cutoff_noresolve = 15;
+	int cutoff_resolve = 60;
 
-	git_config(git_rerere_gc_config, &cf);
+	git_config_get_int("gc.rerereresolved", &cutoff_resolve);
+	git_config_get_int("gc.rerereunresolved", &cutoff_noresolve);
+	git_config(git_default_config, NULL);
 	dir = opendir(git_path("rr-cache"));
 	if (!dir)
 		die_errno("unable to open rr-cache directory");
@@ -736,12 +717,12 @@ void rerere_gc(struct string_list *rr)
 
 		then = rerere_last_used_at(e->d_name);
 		if (then) {
-			cutoff = cf.cutoff_resolve;
+			cutoff = cutoff_resolve;
 		} else {
 			then = rerere_created_at(e->d_name);
 			if (!then)
 				continue;
-			cutoff = cf.cutoff_noresolve;
+			cutoff = cutoff_noresolve;
 		}
 		if (then < now - cutoff * 86400)
 			string_list_append(&to_remove, e->d_name);
-- 
1.9.0.GIT

[PATCH v2 07/11] builtin/gc.c: replace `git_config()` with `git_config_get_*()` family

[Tanay Abhra]

Use `git_config_get_*()` family instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 builtin/gc.c | 51 ++++++++++++++++++++-------------------------------
 1 file changed, 20 insertions(+), 31 deletions(-)

diff --git a/builtin/gc.c b/builtin/gc.c
index 8d219d8..ced1456 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -55,44 +55,33 @@ static void remove_pidfile_on_signal(int signo)
 	raise(signo);
 }
 
-static int gc_config(const char *var, const char *value, void *cb)
+static void gc_config(void)
 {
-	if (!strcmp(var, "gc.packrefs")) {
+	const char *value;
+
+	if (!git_config_get_value("gc.packrefs", &value)) {
 		if (value && !strcmp(value, "notbare"))
 			pack_refs = -1;
 		else
-			pack_refs = git_config_bool(var, value);
-		return 0;
-	}
-	if (!strcmp(var, "gc.aggressivewindow")) {
-		aggressive_window = git_config_int(var, value);
-		return 0;
-	}
-	if (!strcmp(var, "gc.aggressivedepth")) {
-		aggressive_depth = git_config_int(var, value);
-		return 0;
-	}
-	if (!strcmp(var, "gc.auto")) {
-		gc_auto_threshold = git_config_int(var, value);
-		return 0;
-	}
-	if (!strcmp(var, "gc.autopacklimit")) {
-		gc_auto_pack_limit = git_config_int(var, value);
-		return 0;
+			pack_refs = git_config_bool("gc.packrefs", value);
 	}
-	if (!strcmp(var, "gc.autodetach")) {
-		detach_auto = git_config_bool(var, value);
-		return 0;
-	}
-	if (!strcmp(var, "gc.pruneexpire")) {
-		if (value && strcmp(value, "now")) {
+
+	git_config_get_int("gc.aggressivewindow", &aggressive_window);
+	git_config_get_int("gc.aggressivedepth", &aggressive_depth);
+	git_config_get_int("gc.auto", &gc_auto_threshold);
+	git_config_get_int("gc.autopacklimit", &gc_auto_pack_limit);
+	git_config_get_bool("gc.autodetach", &detach_auto);
+
+	if (!git_config_get_string_const("gc.pruneexpire", &prune_expire)) {
+		if (strcmp(prune_expire, "now")) {
 			unsigned long now = approxidate("now");
-			if (approxidate(value) >= now)
-				return error(_("Invalid %s: '%s'"), var, value);
+			if (approxidate(prune_expire) >= now) {
+				git_die_config("gc.pruneexpire", _("Invalid gc.pruneexpire: '%s'"),
+						prune_expire);
+			}
 		}
-		return git_config_string(&prune_expire, var, value);
 	}
-	return git_default_config(var, value, cb);
+	git_config(git_default_config, NULL);
 }
 
 static int too_many_loose_objects(void)
@@ -301,7 +290,7 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 	argv_array_pushl(&prune, "prune", "--expire", NULL );
 	argv_array_pushl(&rerere, "rerere", "gc", NULL);
 
-	git_config(gc_config, NULL);
+	gc_config();
 
 	if (pack_refs < 0)
 		pack_refs = !is_bare_repository();
-- 
1.9.0.GIT

[PATCH v2 08/11] pager.c: replace `git_config()` with `git_config_get_value()`

[Tanay Abhra]

Use `git_config_get_value()` instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 pager.c | 40 +++++++++++++---------------------------
 1 file changed, 13 insertions(+), 27 deletions(-)

diff --git a/pager.c b/pager.c
index 8b5cbc5..b7eb7e7 100644
--- a/pager.c
+++ b/pager.c
@@ -6,12 +6,6 @@
 #define DEFAULT_PAGER "less"
 #endif
 
-struct pager_config {
-	const char *cmd;
-	int want;
-	char *value;
-};
-
 /*
  * This is split up from the rest of git so that we can do
  * something different on Windows.
@@ -155,30 +149,22 @@ int decimal_width(int number)
 	return width;
 }
 
-static int pager_command_config(const char *var, const char *value, void *data)
+/* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
+int check_pager_config(const char *cmd)
 {
-	struct pager_config *c = data;
-	if (starts_with(var, "pager.") && !strcmp(var + 6, c->cmd)) {
-		int b = git_config_maybe_bool(var, value);
+	int want = -1;
+	struct strbuf key = STRBUF_INIT;
+	const char *value = NULL;
+	strbuf_addf(&key, "pager.%s", cmd);
+	if (!git_config_get_value(key.buf, &value)) {
+		int b = git_config_maybe_bool(key.buf, value);
 		if (b >= 0)
-			c->want = b;
+			want = b;
 		else {
-			c->want = 1;
-			c->value = xstrdup(value);
+			want = 1;
+			pager_program = xstrdup(value);
 		}
 	}
-	return 0;
-}
-
-/* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
-int check_pager_config(const char *cmd)
-{
-	struct pager_config c;
-	c.cmd = cmd;
-	c.want = -1;
-	c.value = NULL;
-	git_config(pager_command_config, &c);
-	if (c.value)
-		pager_program = c.value;
-	return c.want;
+	strbuf_release(&key);
+	return want;
 }
-- 
1.9.0.GIT

[PATCH v2 09/11] imap-send.c: replace `git_config()` with `git_config_get_*()` family

[Tanay Abhra]

Use `git_config_get_*()` family instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 imap-send.c | 60 ++++++++++++++++++++++++++----------------------------------
 1 file changed, 26 insertions(+), 34 deletions(-)

diff --git a/imap-send.c b/imap-send.c
index 524fbab..618d75b 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -1326,43 +1326,35 @@ static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
 
 static char *imap_folder;
 
-static int git_imap_config(const char *key, const char *val, void *cb)
+static void git_imap_config(void)
 {
-	if (!skip_prefix(key, "imap.", &key))
-		return 0;
+	const char *val = NULL;
+
+	git_config_get_bool("imap.sslverify", &server.ssl_verify);
+	git_config_get_bool("imap.preformattedhtml", &server.use_html);
+	git_config_get_string("imap.folder", &imap_folder);
 
-	/* check booleans first, and barf on others */
-	if (!strcmp("sslverify", key))
-		server.ssl_verify = git_config_bool(key, val);
-	else if (!strcmp("preformattedhtml", key))
-		server.use_html = git_config_bool(key, val);
-	else if (!val)
-		return config_error_nonbool(key);
-
-	if (!strcmp("folder", key)) {
-		imap_folder = xstrdup(val);
-	} else if (!strcmp("host", key)) {
-		if (starts_with(val, "imap:"))
-			val += 5;
-		else if (starts_with(val, "imaps:")) {
-			val += 6;
-			server.use_ssl = 1;
+	if (!git_config_get_value("imap.host", &val)) {
+		if (!val) {
+			git_die_config("imap.host", "Missing value for 'imap.host'");
+		} else {
+			if (starts_with(val, "imap:"))
+				val += 5;
+			else if (starts_with(val, "imaps:")) {
+				val += 6;
+				server.use_ssl = 1;
+			}
+			if (starts_with(val, "//"))
+				val += 2;
+			server.host = xstrdup(val);
 		}
-		if (starts_with(val, "//"))
-			val += 2;
-		server.host = xstrdup(val);
-	} else if (!strcmp("user", key))
-		server.user = xstrdup(val);
-	else if (!strcmp("pass", key))
-		server.pass = xstrdup(val);
-	else if (!strcmp("port", key))
-		server.port = git_config_int(key, val);
-	else if (!strcmp("tunnel", key))
-		server.tunnel = xstrdup(val);
-	else if (!strcmp("authmethod", key))
-		server.auth_method = xstrdup(val);
+	}
 
-	return 0;
+	git_config_get_string("imap.user", &server.user);
+	git_config_get_string("imap.pass", &server.pass);
+	git_config_get_int("imap.port", &server.port);
+	git_config_get_string("imap.tunnel", &server.tunnel);
+	git_config_get_string("imap.authmethod", &server.auth_method);
 }
 
 int main(int argc, char **argv)
@@ -1383,7 +1375,7 @@ int main(int argc, char **argv)
 		usage(imap_send_usage);
 
 	setup_git_directory_gently(&nongit_ok);
-	git_config(git_imap_config, NULL);
+	git_imap_config();
 
 	if (!server.port)
 		server.port = server.use_ssl ? 993 : 143;
-- 
1.9.0.GIT

[PATCH v2 10/11] alias.c: replace `git_config()` with `git_config_get_string()`

[Tanay Abhra]

Use `git_config_get_string()` instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 alias.c | 25 ++++++-------------------
 1 file changed, 6 insertions(+), 19 deletions(-)

diff --git a/alias.c b/alias.c
index 758c867..6aa164a 100644
--- a/alias.c
+++ b/alias.c
@@ -1,26 +1,13 @@
 #include "cache.h"
 
-static const char *alias_key;
-static char *alias_val;
-
-static int alias_lookup_cb(const char *k, const char *v, void *cb)
-{
-	const char *name;
-	if (skip_prefix(k, "alias.", &name) && !strcmp(name, alias_key)) {
-		if (!v)
-			return config_error_nonbool(k);
-		alias_val = xstrdup(v);
-		return 0;
-	}
-	return 0;
-}
-
 char *alias_lookup(const char *alias)
 {
-	alias_key = alias;
-	alias_val = NULL;
-	git_config(alias_lookup_cb, NULL);
-	return alias_val;
+	char *v = NULL;
+	struct strbuf key = STRBUF_INIT;
+	strbuf_addf(&key, "alias.%s", alias);
+	git_config_get_string(key.buf, &v);
+	strbuf_release(&key);
+	return v;
 }
 
 #define SPLIT_CMDLINE_BAD_ENDING 1
-- 
1.9.0.GIT

[PATCH v2 11/11] branch.c: replace `git_config()` with `git_config_get_string()

[Tanay Abhra]

Use `git_config_get_string()` instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 branch.c | 27 +++++++--------------------
 1 file changed, 7 insertions(+), 20 deletions(-)

diff --git a/branch.c b/branch.c
index 735767d..df6b120 100644
--- a/branch.c
+++ b/branch.c
@@ -140,30 +140,17 @@ static int setup_tracking(const char *new_ref, const char *orig_ref,
 	return 0;
 }
 
-struct branch_desc_cb {
-	const char *config_name;
-	const char *value;
-};
-
-static int read_branch_desc_cb(const char *var, const char *value, void *cb)
-{
-	struct branch_desc_cb *desc = cb;
-	if (strcmp(desc->config_name, var))
-		return 0;
-	free((char *)desc->value);
-	return git_config_string(&desc->value, var, value);
-}
-
 int read_branch_desc(struct strbuf *buf, const char *branch_name)
 {
-	struct branch_desc_cb cb;
+	char *v = NULL;
 	struct strbuf name = STRBUF_INIT;
 	strbuf_addf(&name, "branch.%s.description", branch_name);
-	cb.config_name = name.buf;
-	cb.value = NULL;
-	git_config(read_branch_desc_cb, &cb);
-	if (cb.value)
-		strbuf_addstr(buf, cb.value);
+	if (git_config_get_string(name.buf, &v)) {
+		strbuf_release(&name);
+		return -1;
+	}
+	strbuf_addstr(buf, v);
+	free(v);
 	strbuf_release(&name);
 	return 0;
 }
-- 
1.9.0.GIT

Re: [PATCH v2 11/11] branch.c: replace `git_config()` with `git_config_get_string()

[Matthieu Moy]

Tanay Abhra <tanayabh@gmail.com> writes:

> Use `git_config_get_string()` instead of `git_config()` to take advantage of
> the config-set API which provides a cleaner control flow.
>
> Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
> ---
>  branch.c | 27 +++++++--------------------
>  1 file changed, 7 insertions(+), 20 deletions(-)
>
> diff --git a/branch.c b/branch.c
> index 735767d..df6b120 100644
> --- a/branch.c
> +++ b/branch.c
> @@ -140,30 +140,17 @@ static int setup_tracking(const char *new_ref, const char *orig_ref,
>  	return 0;
>  }
>  
> -struct branch_desc_cb {
> -	const char *config_name;
> -	const char *value;
> -};
> -
> -static int read_branch_desc_cb(const char *var, const char *value, void *cb)
> -{
> -	struct branch_desc_cb *desc = cb;
> -	if (strcmp(desc->config_name, var))
> -		return 0;
> -	free((char *)desc->value);
> -	return git_config_string(&desc->value, var, value);
> -}
> -
>  int read_branch_desc(struct strbuf *buf, const char *branch_name)
>  {
> -	struct branch_desc_cb cb;
> +	char *v = NULL;
>  	struct strbuf name = STRBUF_INIT;
>  	strbuf_addf(&name, "branch.%s.description", branch_name);
> -	cb.config_name = name.buf;
> -	cb.value = NULL;
> -	git_config(read_branch_desc_cb, &cb);
> -	if (cb.value)
> -		strbuf_addstr(buf, cb.value);
> +	if (git_config_get_string(name.buf, &v)) {
> +		strbuf_release(&name);
> +		return -1;
> +	}
> +	strbuf_addstr(buf, v);
> +	free(v);

There's a behavior change here, but I think it is the right thing to do.

It lacks a proper commit message though:

As a reminder, your patch "change `git_config()` return value to void"
in the other series did:

--- a/branch.c
+++ b/branch.c
@@ -161,10 +161,7 @@ int read_branch_desc(struct strbuf *buf, const char *branch_name)
         strbuf_addf(&name, "branch.%s.description", branch_name);
         cb.config_name = name.buf;
         cb.value = NULL;
-        if (git_config(read_branch_desc_cb, &cb) < 0) {
-                strbuf_release(&name);
-                return -1;
-        }
+        git_config(read_branch_desc_cb, &cb);
         if (cb.value)
                 strbuf_addstr(buf, cb.value);
         strbuf_release(&name);

So, before it, read_branch_desc() was returning -1 iff git_config()
failed, which essentially never happened.

Now, you're retoring a similar "if", but you strbuf_release and return
-1 if no value is found for the variable.

There are 3 callers of read_branch_desc:

builtin/branch.c:       read_branch_desc(&buf, branch_name);
builtin/fmt-merge-msg.c:        if (!read_branch_desc(&desc, name)) {
builtin/log.c:  read_branch_desc(&desc, branch_name);

Only the one in fmt-merge-msg.c uses the return value:

static void add_branch_desc(struct strbuf *out, const char *name)
{
	struct strbuf desc = STRBUF_INIT;

	if (!read_branch_desc(&desc, name)) {
		const char *bp = desc.buf;
		while (*bp) { /* (1) */
			const char *ep = strchrnul(bp, '\n');
			if (*ep)
				ep++;
			strbuf_addf(out, "  : %.*s", (int)(ep - bp), bp);
			bp = ep;
		}
		if (out->buf[out->len - 1] != '\n') /* (2) */
			strbuf_addch(out, '\n');
	}
	strbuf_release(&desc);
}

the (1) part is a no-op if no value is found, but the old code was still
adding a \n in the (2) part, even when no value was found.

So, the new code is better than the old one, but your patch does a bit
more than the commit message claims.

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

[PATCH v3 11/11] branch.c: replace `git_config()` with `git_config_get_string()

[Tanay Abhra]

Use `git_config_get_string()` instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow. While we are at
it, return -1 if we find no value for the queried variable. Original code
returned 0 for all cases, which was checked by `add_branch_desc()` in
fmt-merge-msg.c resulting in addition of a spurious newline to the `out`
strbuf. Now, the newline addition is skipped as -1 is returned to the caller
if no value is found.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
v3: Changed the commit message to a more appropriate one.

 branch.c | 27 +++++++--------------------
 1 file changed, 7 insertions(+), 20 deletions(-)

diff --git a/branch.c b/branch.c
index 735767d..df6b120 100644
--- a/branch.c
+++ b/branch.c
@@ -140,30 +140,17 @@ static int setup_tracking(const char *new_ref, const char *orig_ref,
 	return 0;
 }

-struct branch_desc_cb {
-	const char *config_name;
-	const char *value;
-};
-
-static int read_branch_desc_cb(const char *var, const char *value, void *cb)
-{
-	struct branch_desc_cb *desc = cb;
-	if (strcmp(desc->config_name, var))
-		return 0;
-	free((char *)desc->value);
-	return git_config_string(&desc->value, var, value);
-}
-
 int read_branch_desc(struct strbuf *buf, const char *branch_name)
 {
-	struct branch_desc_cb cb;
+	char *v = NULL;
 	struct strbuf name = STRBUF_INIT;
 	strbuf_addf(&name, "branch.%s.description", branch_name);
-	cb.config_name = name.buf;
-	cb.value = NULL;
-	git_config(read_branch_desc_cb, &cb);
-	if (cb.value)
-		strbuf_addstr(buf, cb.value);
+	if (git_config_get_string(name.buf, &v)) {
+		strbuf_release(&name);
+		return -1;
+	}
+	strbuf_addstr(buf, v);
+	free(v);
 	strbuf_release(&name);
 	return 0;
 }
-- 1.9.0.GIT

Re: [PATCH v2 00/11] git_config callers rewritten with the new config-set API

[Matthieu Moy]

Tanay Abhra <tanayabh@gmail.com> writes:

> [v2]: git_die_config() messages changed. Diff between v1 and v2 is at the bottom.

I went through the series once more, and all the changes look good.

v3 for PATCH 11/11 addresses my comment about the commit message in v2.

Reviewed-by: Matthieu Moy <Matthieu.Moy@imag.fr>

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

Re: [PATCH v2 00/11] git_config callers rewritten with the new config-set API

[Junio C Hamano]

Tanay Abhra <tanayabh@gmail.com> writes:

>  11 files changed, 114 insertions(+), 250 deletions(-)

Nice reduction.