Hi Junio & Jonathan, On Wed, 24 Oct 2018, Junio C Hamano wrote:
> Jonathan, do you see any issues with the use of lookup_commit() in > this change wrt lazy clone? I am wondering what happens when the > commit in question is at, an immediate parent of, or an immediate > child of a promisor object. I _think_ this change won't make it > worse for two features in playing together, but thought that it > would be better to double check. Good point. Instinctively, I would say that no promised object can be a shallow commit. The entire idea of a shallow commit is that it *is* present, but none of its parents. Also, I would claim that the shallow feature does not make sense with lazy clones, as lazy clones offer a superset of shallow clone's functionality. However, I am curious whether there is a better way to check for the presence of a local commit? Do we have an API function for that, that I missed? (I do not really want to parse the commit, after all, just verify that it is not pruned.) Thanks, Dscho > > "Johannes Schindelin via GitGitGadget" <gitgitgad...@gmail.com> > writes: > > > From: Johannes Schindelin <johannes.schinde...@gmx.de> > > > > The `prune_shallow()` function wants a full reachability check to be > > completed before it goes to work, to ensure that all unreachable entries > > are removed from the shallow file. > > > > However, in the upcoming patch we do not even want to go that far. We > > really only need to remove entries corresponding to pruned commits, i.e. > > to commits that no longer exist. > > > > Let's support that use case. > > > > Signed-off-by: Johannes Schindelin <johannes.schinde...@gmx.de> > > --- > > builtin/prune.c | 2 +- > > commit.h | 2 +- > > shallow.c | 22 +++++++++++++++++----- > > 3 files changed, 19 insertions(+), 7 deletions(-) > > > > diff --git a/builtin/prune.c b/builtin/prune.c > > index 41230f821..6d6ab6cf1 100644 > > --- a/builtin/prune.c > > +++ b/builtin/prune.c > > @@ -161,7 +161,7 @@ int cmd_prune(int argc, const char **argv, const char > > *prefix) > > free(s); > > > > if (is_repository_shallow(the_repository)) > > - prune_shallow(show_only); > > + prune_shallow(show_only, 0); > > > > return 0; > > } > > diff --git a/commit.h b/commit.h > > index 1d260d62f..ff34447ab 100644 > > --- a/commit.h > > +++ b/commit.h > > @@ -249,7 +249,7 @@ extern void assign_shallow_commits_to_refs(struct > > shallow_info *info, > > uint32_t **used, > > int *ref_status); > > extern int delayed_reachability_test(struct shallow_info *si, int c); > > -extern void prune_shallow(int show_only); > > +extern void prune_shallow(int show_only, int quick_prune); > > extern struct trace_key trace_shallow; > > > > extern int interactive_add(int argc, const char **argv, const char > > *prefix, int patch); > > diff --git a/shallow.c b/shallow.c > > index 732e18d54..0a2671bc2 100644 > > --- a/shallow.c > > +++ b/shallow.c > > @@ -247,6 +247,7 @@ static void check_shallow_file_for_update(struct > > repository *r) > > > > #define SEEN_ONLY 1 > > #define VERBOSE 2 > > +#define QUICK_PRUNE 4 > > > > struct write_shallow_data { > > struct strbuf *out; > > @@ -261,7 +262,11 @@ static int write_one_shallow(const struct commit_graft > > *graft, void *cb_data) > > const char *hex = oid_to_hex(&graft->oid); > > if (graft->nr_parent != -1) > > return 0; > > - if (data->flags & SEEN_ONLY) { > > + if (data->flags & QUICK_PRUNE) { > > + struct commit *c = lookup_commit(the_repository, &graft->oid); > > + if (!c || parse_commit(c)) > > + return 0; > > + } else if (data->flags & SEEN_ONLY) { > > struct commit *c = lookup_commit(the_repository, &graft->oid); > > if (!c || !(c->object.flags & SEEN)) { > > if (data->flags & VERBOSE) > > @@ -371,16 +376,23 @@ void advertise_shallow_grafts(int fd) > > > > /* > > * mark_reachable_objects() should have been run prior to this and all > > - * reachable commits marked as "SEEN". > > + * reachable commits marked as "SEEN", except when quick_prune is non-zero, > > + * in which case lines are excised from the shallow file if they refer to > > + * commits that do not exist (any longer). > > */ > > -void prune_shallow(int show_only) > > +void prune_shallow(int show_only, int quick_prune) > > { > > struct lock_file shallow_lock = LOCK_INIT; > > struct strbuf sb = STRBUF_INIT; > > + unsigned flags = SEEN_ONLY; > > int fd; > > > > + if (quick_prune) > > + flags |= QUICK_PRUNE; > > + > > if (show_only) { > > - write_shallow_commits_1(&sb, 0, NULL, SEEN_ONLY | VERBOSE); > > + flags |= VERBOSE; > > + write_shallow_commits_1(&sb, 0, NULL, flags); > > strbuf_release(&sb); > > return; > > } > > @@ -388,7 +400,7 @@ void prune_shallow(int show_only) > > git_path_shallow(the_repository), > > LOCK_DIE_ON_ERROR); > > check_shallow_file_for_update(the_repository); > > - if (write_shallow_commits_1(&sb, 0, NULL, SEEN_ONLY)) { > > + if (write_shallow_commits_1(&sb, 0, NULL, flags)) { > > if (write_in_full(fd, sb.buf, sb.len) < 0) > > die_errno("failed to write to %s", > > get_lock_file_path(&shallow_lock)); >