[PATCH] Teach "git stripspace" the --strip-comments option

[Johannes Schindelin <Johannes.Schindelin@gmx.de>]

With --strip-comments (or short -s), git stripspace now removes lines
beginning with a '#', too.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 Documentation/git-stripspace.txt |    5 ++++-
 builtin-stripspace.c             |    7 ++++++-
 t/t0030-stripspace.sh            |    5 +++++
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/Documentation/git-stripspace.txt b/Documentation/git-stripspace.txt
index 1306d7b..5212358 100644
--- a/Documentation/git-stripspace.txt
+++ b/Documentation/git-stripspace.txt
@@ -8,7 +8,7 @@ git-stripspace - Filter out empty lines
 
 SYNOPSIS
 --------
-'git-stripspace' < <stream>
+'git-stripspace' [-s | --strip-comments] < <stream>
 
 DESCRIPTION
 -----------
@@ -16,6 +16,9 @@ Remove multiple empty lines, and empty lines at beginning and end.
 
 OPTIONS
 -------
+-s\|--strip-comments::
+	In addition to empty lines, also strip lines starting with '#'.
+
 <stream>::
 	Byte stream to act on.
 
diff --git a/builtin-stripspace.c b/builtin-stripspace.c
index 5571687..916355c 100644
--- a/builtin-stripspace.c
+++ b/builtin-stripspace.c
@@ -76,6 +76,11 @@ int cmd_stripspace(int argc, const char **argv, const char *prefix)
 {
 	char *buffer;
 	unsigned long size;
+	int strip_comments = 0;
+
+	if (argc > 1 && (!strcmp(argv[1], "-s") ||
+				!strcmp(argv[1], "--strip-comments")))
+		strip_comments = 1;
 
 	size = 1024;
 	buffer = xmalloc(size);
@@ -84,7 +89,7 @@ int cmd_stripspace(int argc, const char **argv, const char *prefix)
 		die("could not read the input");
 	}
 
-	size = stripspace(buffer, size, 0);
+	size = stripspace(buffer, size, strip_comments);
 	write_or_die(1, buffer, size);
 	if (size)
 		putc('\n', stdout);
diff --git a/t/t0030-stripspace.sh b/t/t0030-stripspace.sh
index b1c9003..cad95f3 100755
--- a/t/t0030-stripspace.sh
+++ b/t/t0030-stripspace.sh
@@ -392,4 +392,9 @@ test_expect_success \
     git diff expect actual
 '
 
+test_expect_success 'strip comments, too' '
+	test ! -z "$(echo "# comment" | git stripspace)" &&
+	test -z "$(echo "# comment" | git stripspace -s)"
+'
+
 test_done
-- 
1.5.3.rc2.32.g35c5b