[PATCH] merge-file: support -p and -q; fix compile warnings

[Johannes Schindelin <Johannes.Schindelin@xxxxxx>]

Now merge-file also understands --stdout and --quiet options. While
at it, two compile warnings were fixed.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@xxxxxx>
---

	On Wed, 6 Dec 2006, Jakub Narebski wrote:

	> Johannes Schindelin wrote:
	> 
	> > merge-file has the same syntax as RCS merge, but supports only 
	> > the "-L" option.
	> 
	> Would it be hard to add "-p / --stdout" options, and "-q / 
	> --quiet" option?

	No.

	But the documentation has to be done by somebody else.

 builtin-merge-file.c |   29 ++++++++++++++++++-----------
 1 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/builtin-merge-file.c b/builtin-merge-file.c
index 11976ea..9ae1009 100644
--- a/builtin-merge-file.c
+++ b/builtin-merge-file.c
@@ -2,7 +2,7 @@
 #include "xdiff/xdiff.h"
 
 static const char merge_file_usage[] =
-"git merge-file [-L name1 [-L orig [-L name2]]] file1 orig_file file2";
+"git merge-file [-p | --stdout] [-q | --quiet] [-L name1 [-L orig [-L name2]]] file1 orig_file file2";
 
 static int read_file(mmfile_t *ptr, const char *filename)
 {
@@ -24,18 +24,25 @@ static int read_file(mmfile_t *ptr, const char *filename)
 int cmd_merge_file(int argc, char **argv, char **envp)
 {
 	char *names[3];
-	char *buffers[3];
-	mmfile_t mmfs[3], result = {NULL, 0};
-	int ret = 0, i = 0;
+	mmfile_t mmfs[3];
+	mmbuffer_t result = {NULL, 0};
+	int ret = 0, i = 0, to_stdout = 0;
 
 	while (argc > 4) {
-		if (!strcmp(argv[1], "-L")) {
+		if (!strcmp(argv[1], "-L") && i < 3) {
 			names[i++] = argv[2];
-			argc -= 2;
-			argv += 2;
-			continue;
-		}
-		usage(merge_file_usage);
+			argc--;
+			argv++;
+		} else if (!strcmp(argv[1], "-p") ||
+				!strcmp(argv[1], "--stdout"))
+			to_stdout = 1;
+		else if (!strcmp(argv[1], "-q") ||
+				!strcmp(argv[1], "--quiet"))
+			freopen("/dev/null", "w", stderr);
+		else
+			usage(merge_file_usage);
+		argc--;
+		argv++;
 	}
 
 	if (argc != 4)
@@ -57,7 +64,7 @@ int cmd_merge_file(int argc, char **argv, char **envp)
 
 	if (ret >= 0) {
 		char *filename = argv[1];
-		FILE *f = fopen(filename, "wb");
+		FILE *f = to_stdout ? stdout : fopen(filename, "wb");
 
 		if (!f)
 			ret = error("Could not open %s for writing", filename);
-- 
1.4.4.1.g1f348-dirty
-
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