Subject: Re: BUG Report: git branch ignore --no-abbrev flag

From: Junio C Hamano <[email-masked]>
Date: Wed, 08 Mar 2017 13:59:24 -0800

Junio C Hamano <[email-masked]> writes:

> Guillaume Wenzek <[email-masked]> writes:
>
>> After updating to git 2.12.0 on Monday I noticed that the "git branch"
>> wasn't behaving as usual.
>
> Are you sure you are trying 2.12?  v2.12.0 and before should behave
> the same way and honor --no-abbrev as far as I know.
>
> On the other hand, 'master' has 93e8cd8b ("Merge branch
> 'kn/ref-filter-branch-list'", 2017-02-27), which seems to introduce
> the regression.
>
> Karthik?

I haven't fully checked if filter.abbrev is set correctly, but I
noticed the output format is formulated without taking the value of
filter.abbrev into account at all, so this is an attempt to fix
that omission.

I also notice that filter.abbrev is _ONLY_ used by builtin/branch.c and
the actual ref-filter code does not have to know anything about it.

We probably should eliminate filter.abbrev field from the structure
and use a regular variable in builtin/branch.c and use it to pass
the result of command line parsing from cmd_branch() down to
build_format() as an argument.  

But that is outside the scope of regression fix.

 builtin/branch.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/builtin/branch.c b/builtin/branch.c
index cbaa6d03c0..537c47811a 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -335,9 +335,18 @@ static char *build_format(struct ref_filter *filter, int maxwidth, const char *r
 		    branch_get_color(BRANCH_COLOR_CURRENT));
 
 	if (filter->verbose) {
+		struct strbuf obname = STRBUF_INIT;
+
+		if (filter->abbrev < 0)
+			strbuf_addf(&obname, "%%(objectname:short)");
+		else if (!filter->abbrev)
+			strbuf_addf(&obname, "%%(objectname)");
+		else
+			strbuf_addf(&obname, " %%(objectname:short=%d) ", filter->abbrev);
+
 		strbuf_addf(&local, "%%(align:%d,left)%%(refname:lstrip=2)%%(end)", maxwidth);
 		strbuf_addf(&local, "%s", branch_get_color(BRANCH_COLOR_RESET));
-		strbuf_addf(&local, " %%(objectname:short=7) ");
+		strbuf_addf(&local, " %s ", obname.buf);
 
 		if (filter->verbose > 1)
 			strbuf_addf(&local, "%%(if)%%(upstream)%%(then)[%s%%(upstream:short)%s%%(if)%%(upstream:track)"
@@ -346,10 +355,12 @@ static char *build_format(struct ref_filter *filter, int maxwidth, const char *r
 		else
 			strbuf_addf(&local, "%%(if)%%(upstream:track)%%(then)%%(upstream:track) %%(end)%%(contents:subject)");
 
-		strbuf_addf(&remote, "%s%%(align:%d,left)%s%%(refname:lstrip=2)%%(end)%s%%(if)%%(symref)%%(then) -> %%(symref:short)"
-			    "%%(else) %%(objectname:short=7) %%(contents:subject)%%(end)",
+		strbuf_addf(&remote, "%s%%(align:%d,left)%s%%(refname:lstrip=2)%%(end)%s"
+			    "%%(if)%%(symref)%%(then) -> %%(symref:short)"
+			    "%%(else) %s %%(contents:subject)%%(end)",
 			    branch_get_color(BRANCH_COLOR_REMOTE), maxwidth, quote_literal_for_format(remote_prefix),
-			    branch_get_color(BRANCH_COLOR_RESET));
+			    branch_get_color(BRANCH_COLOR_RESET), obname.buf);
+		strbuf_release(&obname);
 	} else {
 		strbuf_addf(&local, "%%(refname:lstrip=2)%s%%(if)%%(symref)%%(then) -> %%(symref:short)%%(end)",
 			    branch_get_color(BRANCH_COLOR_RESET));