git-diff: Add --staged as a synonym for --cached.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-diff.txt b/Documentation/git-diff.txt
index c53eba557d0a242a0d8553d9569ce8b2eb86331b..a2f192fb7519117f8e47f3ec4608e3301c200dc3 100644 (file)
--- a/Documentation/git-diff.txt
+++ b/Documentation/git-diff.txt
@@ -33,6 +33,7 @@ forced by --no-index.
        commit relative to the named <commit>.  Typically you
        would want comparison with the latest commit, so if you
        do not give <commit>, it defaults to HEAD.
+       --staged is a synonym of --cached.
 
 'git diff' [--options] <commit> [--] [<path>...]::
 

diff --git a/builtin-diff.c b/builtin-diff.c
index 9c8c295732bf12990b8324bf75968fd68dd41d59..82d4ddabd85072829199fe8dc17c2de15691dac2 100644 (file)
--- a/builtin-diff.c
+++ b/builtin-diff.c
@@ -118,7 +118,7 @@ static int builtin_diff_index(struct rev_info *revs,
        int cached = 0;
        while (1 < argc) {
                const char *arg = argv[1];
-               if (!strcmp(arg, "--cached"))
+               if (!strcmp(arg, "--cached") || !strcmp(arg, "--staged"))
                        cached = 1;
                else
                        usage(builtin_diff_usage);
@@ -319,7 +319,8 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                        const char *arg = argv[i];
                        if (!strcmp(arg, "--"))
                                break;
-                       else if (!strcmp(arg, "--cached")) {
+                       else if (!strcmp(arg, "--cached") ||
+                                !strcmp(arg, "--staged")) {
                                add_head_to_pending(&rev);
                                if (!rev.pending.nr)
                                        die("No HEAD commit to compare with (yet)");