[PATCH] diff: add --no-diff-deleted to make -p more pleasant

[Eric Wong <normalperson@yhbt.net>]

This is a feature I've stol^Wborrowed from svn that I find very
useful since I usually don't care to see what I've deleted.

Signed-off-by: Eric Wong <normalperson@yhbt.net>

---

 diff.c |    6 ++++++
 diff.h |    3 +++
 2 files changed, 9 insertions(+), 0 deletions(-)

0b426af15a7da4f430d9cca8c1ad057557d93627
diff --git a/diff.c b/diff.c
index f45d18c..6db3e19 100644
--- a/diff.c
+++ b/diff.c
@@ -769,6 +769,7 @@ void diff_setup(struct diff_options *opt
 {
 	memset(options, 0, sizeof(*options));
 	options->output_format = DIFF_FORMAT_RAW;
+	options->diff_deleted = 1;
 	options->line_termination = '\n';
 	options->break_opt = -1;
 	options->rename_limit = -1;
@@ -849,6 +850,8 @@ int diff_opt_parse(struct diff_options *
 	}
 	else if (!strcmp(arg, "--find-copies-harder"))
 		options->find_copies_harder = 1;
+	else if (!strcmp(arg, "--no-diff-deleted"))
+		options->diff_deleted = 0;
 	else if (!strcmp(arg, "--abbrev"))
 		options->abbrev = DEFAULT_ABBREV;
 	else if (!strncmp(arg, "--abbrev=", 9)) {
@@ -1103,6 +1106,9 @@ int diff_unmodified_pair(struct diff_fil
 
 static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o)
 {
+	if (!o->diff_deleted && (p->status == DIFF_STATUS_DELETED))
+		return;
+
 	if (diff_unmodified_pair(p))
 		return;
 
diff --git a/diff.h b/diff.h
index 9a0169c..4f320ac 100644
--- a/diff.h
+++ b/diff.h
@@ -39,6 +39,7 @@ struct diff_options {
 	int find_copies_harder;
 	int line_termination;
 	int output_format;
+	int diff_deleted;
 	int pickaxe_opts;
 	int rename_score;
 	int reverse_diff;
@@ -120,6 +121,8 @@ extern void diffcore_std_no_resolve(stru
 "  -C            detect copies.\n" \
 "  --find-copies-harder\n" \
 "                try unchanged files as candidate for copy detection.\n" \
+"  --no-diff-deleted\n" \
+"                do not print patch format for deleted files\n" \
 "  -l<n>         limit rename attempts up to <n> paths.\n" \
 "  -O<file>      reorder diffs according to the <file>.\n" \
 "  -S<string>    find filepair whose only one side contains the string.\n" \
-- 
1.1.5.gae18-dirty