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

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

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/builtin-merge-file.c b/builtin-merge-file.c
index 41fb92edfbd0512542f277b7e7e4af30e25283be..6c4c3a351333b94ab62b77793b540af5c9bcaa3a 100644 (file)
--- 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)
 {
@@ -27,16 +27,23 @@ int cmd_merge_file(int argc, char **argv, char **envp)
        mmfile_t mmfs[3];
        mmbuffer_t result = {NULL, 0};
        xpparam_t xpp = {XDF_NEED_MINIMAL};
-       int ret = 0, i = 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);