Tentative built-in "git show"

This uses the "--no-walk" flag that I never actually implemented (but I'm
sure I mentioned it) to make "git show" be essentially the same thing as
"git whatchanged --no-walk".

It just refuses to add more interesting parents to the revision walking
history, so you don't actually get any history, you just get the commit
you asked for.

I was going to add "--no-walk" as a real argument flag to git-rev-list
too, but I'm not sure anybody actually needs it. Although it might be
useful for porcelain, so I left the door open.

[jc: ported to the unified option structure by Linus]

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/git.c b/git.c
index 9a89b0a..9e29ade 100644 (file)
--- a/git.c
+++ b/git.c
@@ -354,6 +354,23 @@ static int cmd_wc(int argc, const char **argv, char **envp)
        return cmd_log_wc(argc, argv, envp, &rev);
 }
 
+static int cmd_show(int argc, const char **argv, char **envp)
+{
+       struct rev_info rev;
+
+       init_revisions(&rev);
+       rev.diff = 1;
+       rev.ignore_merges = 0;
+       rev.combine_merges = 1;
+       rev.dense_combined_merges = 1;
+       rev.abbrev = DEFAULT_ABBREV;
+       rev.commit_format = CMIT_FMT_DEFAULT;
+       rev.diffopt.recursive = 1;
+       rev.no_walk = 1;
+       argc = setup_revisions(argc, argv, &rev, "HEAD");
+       return cmd_log_wc(argc, argv, envp, &rev);
+}
+
 static int cmd_log(int argc, const char **argv, char **envp)
 {
        struct rev_info rev;
@@ -377,6 +394,7 @@ static void handle_internal_command(int argc, const char **argv, char **envp)
                { "help", cmd_help },
                { "log", cmd_log },
                { "whatchanged", cmd_wc },
+               { "show", cmd_show },
        };
        int i;
 

diff --git a/revision.c b/revision.c
index 9693b6e..f8fb028 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -380,6 +380,9 @@ static void add_parents_to_list(struct rev_info *revs, struct commit *commit, st
        if (revs->prune_fn)
                revs->prune_fn(revs, commit);
 
+       if (revs->no_walk)
+               return;
+
        parent = commit->parents;
        while (parent) {
                struct commit *p = parent->item;
@@ -816,6 +819,8 @@ void prepare_revision_walk(struct rev_info *revs)
                list = list->next;
        }
 
+       if (revs->no_walk)
+               return;
        if (revs->limited)
                limit_list(revs);
        if (revs->topo_order)

diff --git a/revision.h b/revision.h
index 6eaa904..7b85486 100644 (file)
--- a/revision.h
+++ b/revision.h
@@ -26,6 +26,7 @@ struct rev_info {
        /* Traversal flags */
        unsigned int    dense:1,
                        no_merges:1,
+                       no_walk:1,
                        remove_empty_trees:1,
                        lifo:1,
                        topo_order:1,