shortlog: default to HEAD when the standard input is a tty

Instead of warning the user that it is expecting git log output from
the standard input (and waiting for the user to type the log from
the keyboard, which is a silly thing to do), default to traverse from
HEAD when there is no rev parameter given and the standard input is
a tty.

This factors out a useful helper "add_head()" from builtin-diff.c to a
more appropriate place revision.c while renaming it to more descriptive
name add_head_to_pending(), as that is what the function is about.

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

diff --git a/builtin-diff.c b/builtin-diff.c
index 1b615991e1fc6aaa329811cc9f7b615e20b00917..55fb84c730e4141bdb53fec6602a2bdafc99f8fd 100644 (file)
--- a/builtin-diff.c
+++ b/builtin-diff.c
@@ -176,18 +176,6 @@ static int builtin_diff_combined(struct rev_info *revs,
        return 0;
 }
 
-void add_head(struct rev_info *revs)
-{
-       unsigned char sha1[20];
-       struct object *obj;
-       if (get_sha1("HEAD", sha1))
-               return;
-       obj = parse_object(sha1);
-       if (!obj)
-               return;
-       add_pending_object(revs, obj, "HEAD");
-}
-
 static void refresh_index_quietly(void)
 {
        struct lock_file *lock_file;
@@ -272,7 +260,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                        if (!strcmp(arg, "--"))
                                break;
                        else if (!strcmp(arg, "--cached")) {
-                               add_head(&rev);
+                               add_head_to_pending(&rev);
                                if (!rev.pending.nr)
                                        die("No HEAD commit to compare with (yet)");
                                break;

diff --git a/builtin-log.c b/builtin-log.c
index e1f1cf67143721933010065130adaba8723b272b..d375c9dbf9759d9ddc8a0029bc5803057e5f117d 100644 (file)
--- a/builtin-log.c
+++ b/builtin-log.c
@@ -18,9 +18,6 @@
 static int default_show_root = 1;
 static const char *fmt_patch_subject_prefix = "PATCH";
 
-/* this is in builtin-diff.c */
-void add_head(struct rev_info *revs);
-
 static void add_name_decoration(const char *prefix, const char *name, struct object *obj)
 {
        int plen = strlen(prefix);
@@ -746,7 +743,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
                         * does not have.
                         */
                        rev.pending.objects[0].item->flags |= UNINTERESTING;
-                       add_head(&rev);
+                       add_head_to_pending(&rev);
                }
                /*
                 * Otherwise, it is "format-patch -22 HEAD", and/or

diff --git a/builtin-shortlog.c b/builtin-shortlog.c
index 90666cbd78732c15566fa8050e666999615b8354..3d8d7094ab8f85f557cf3bd58e408c8ab4272f08 100644 (file)
--- a/builtin-shortlog.c
+++ b/builtin-shortlog.c
@@ -249,9 +249,10 @@ int cmd_shortlog(int argc, const char **argv, const char *prefix)
 
        read_mailmap(&mailmap, ".mailmap", &common_repo_prefix);
 
+       /* assume HEAD if from a tty */
+       if (!rev.pending.nr && isatty(0))
+               add_head_to_pending(&rev);
        if (rev.pending.nr == 0) {
-               if (isatty(0))
-                       fprintf(stderr, "(reading log to summarize from standard input)\n");
                read_from_stdin(&list);
        }
        else

diff --git a/revision.c b/revision.c
index 2a59035192baec8265acccf8b5d00aa7b2db4dd7..7e2f4f1eb5090588fc6515b78d39b7c7a4eda00d 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -139,6 +139,18 @@ void add_pending_object(struct rev_info *revs, struct object *obj, const char *n
        add_pending_object_with_mode(revs, obj, name, S_IFINVALID);
 }
 
+void add_head_to_pending(struct rev_info *revs)
+{
+       unsigned char sha1[20];
+       struct object *obj;
+       if (get_sha1("HEAD", sha1))
+               return;
+       obj = parse_object(sha1);
+       if (!obj)
+               return;
+       add_pending_object(revs, obj, "HEAD");
+}
+
 static struct object *get_reference(struct rev_info *revs, const char *name, const unsigned char *sha1, unsigned int flags)
 {
        struct object *object;

diff --git a/revision.h b/revision.h
index 992e1e9dd57eac528c3ecaf09987593d525da611..8572315954d1fde8c36c426d66c665534c22d1f2 100644 (file)
--- a/revision.h
+++ b/revision.h
@@ -130,6 +130,8 @@ extern void add_object(struct object *obj,
 
 extern void add_pending_object(struct rev_info *revs, struct object *obj, const char *name);
 
+extern void add_head_to_pending(struct rev_info *);
+
 enum commit_action {
        commit_ignore,
        commit_show,