rev-parse: teach "--verify" to be quiet when using "-q" or "--quiet"

Currently "git rev-parse --verify <something>" is often used with
its error output redirected to /dev/null. This patch makes it
easier to do that.

The -q|--quiet option is designed to work the same way as it does
for "git symbolic-ref".

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt
index 6513c2efe17668d5fc25a21385ed117ec76b40b5..110e7ba71f48c54cb94f35e819583826e123a8b1 100644 (file)
--- a/Documentation/git-rev-parse.txt
+++ b/Documentation/git-rev-parse.txt
@@ -52,6 +52,11 @@ OPTIONS
        The parameter given must be usable as a single, valid
        object name.  Otherwise barf and abort.
 
+-q, --quiet::
+       Only meaningful in `--verify` mode. Do not output an error
+       message if the first argument is not a valid object name;
+       instead exit with non-zero status silently.
+
 --sq::
        Usually the output is made one line per flag and
        parameter.  This option makes output a single line,

diff --git a/builtin-rev-parse.c b/builtin-rev-parse.c
index 0351d54435b566d5030f3a83df57fb140fffc143..9384a991eec9e1d1d9395caf4a72d6babb288e89 100644 (file)
--- a/builtin-rev-parse.c
+++ b/builtin-rev-parse.c
@@ -365,9 +365,17 @@ static int cmd_parseopt(int argc, const char **argv, const char *prefix)
        return 0;
 }
 
+static void die_no_single_rev(int quiet)
+{
+       if (quiet)
+               exit(1);
+       else
+               die("Needed a single revision");
+}
+
 int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 {
-       int i, as_is = 0, verify = 0;
+       int i, as_is = 0, verify = 0, quiet = 0;
        unsigned char sha1[20];
 
        if (argc > 1 && !strcmp("--parseopt", argv[1]))
@@ -432,6 +440,10 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
                                verify = 1;
                                continue;
                        }
+                       if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
+                               quiet = 1;
+                               continue;
+                       }
                        if (!strcmp(arg, "--short") ||
                            !prefixcmp(arg, "--short=")) {
                                filter &= ~(DO_FLAGS|DO_NOREV);
@@ -549,7 +561,7 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
                                continue;
                        }
                        if (show_flag(arg) && verify)
-                               die("Needed a single revision");
+                               die_no_single_rev(quiet);
                        continue;
                }
 
@@ -568,11 +580,11 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
                if (!show_file(arg))
                        continue;
                if (verify)
-                       die("Needed a single revision");
+                       die_no_single_rev(quiet);
                verify_filename(prefix, arg);
        }
        show_default();
        if (verify && revs_count != 1)
-               die("Needed a single revision");
+               die_no_single_rev(quiet);
        return 0;
 }