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commit-graph write: show progress for object search

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Show the percentage progress for the "Finding commits for commit
graph" phase for the common case where we're operating on all packs in
the repository, as "commit-graph write" or "gc" will do.

Before we'd emit on e.g. linux.git with "commit-graph write":

    Finding commits for commit graph: 6529159, done.
    [...]

And now:

    Finding commits for commit graph: 100% (6529159/6529159), done.
    [...]

Since the commit graph only includes those commits that are packed
(via for_each_packed_object(...)) the approximate_object_count()
returns the actual number of objects we're going to process.

Still, it is possible due to a race with "gc" or another process
maintaining packs that the number of objects we're going to process is
lower than what approximate_object_count() reported. In that case we
don't want to stop the progress bar short of 100%. So let's make sure
it snaps to 100% at the end.

The inverse case is also possible and more likely. I.e. that a new
pack has been added between approximate_object_count() and
for_each_packed_object(). In that case the percentage will go beyond
100%, and we'll do nothing to snap it back to 100% at the end.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2019-01-19 21:21:17 +01:00 committed by Junio C Hamano
parent 289447397c
commit d9b1b309cf
1 changed files with 7 additions and 2 deletions
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9
commit-graph.c
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@ -785,12 +785,14 @@ void write_commit_graph(const char *obj_dir,
struct progress *progress = NULL;
uint64_t progress_cnt = 0;
struct strbuf progress_title = STRBUF_INIT;
unsigned long approx_nr_objects;
if (!commit_graph_compatible(the_repository))
return;
oids.nr = 0;
oids.alloc = approximate_object_count() / 32;
approx_nr_objects = approximate_object_count();
oids.alloc = approx_nr_objects / 32;
oids.progress = NULL;
oids.progress_done = 0;
@ -871,9 +873,12 @@ void write_commit_graph(const char *obj_dir,
if (!pack_indexes && !commit_hex) {
if (report_progress)
oids.progress = start_delayed_progress(
_("Finding commits for commit graph"), 0);
_("Finding commits for commit graph"),
approx_nr_objects);
for_each_packed_object(add_packed_commits, &oids,
FOR_EACH_OBJECT_PACK_ORDER);
if (oids.progress_done < approx_nr_objects)
display_progress(oids.progress, approx_nr_objects);
stop_progress(&oids.progress);
}