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name-rev: restructure parsing commits and applying date cutoff

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At the beginning of the recursive name_rev() function it parses the
commit it got as parameter, and returns early if the commit is older
than a cutoff limit.

Restructure this so the caller parses the commit and checks its date,
and doesn't invoke name_rev() if the commit to be passed as parameter
is older than the cutoff, i.e. both name_ref() before calling
name_rev() and name_rev() itself as it iterates over the parent
commits.

This makes eliminating the recursion a bit easier to follow, and the
condition moved to name_ref() will be moved back to name_rev() after
the recursion is eliminated.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
SZEDER Gábor 2019-11-12 11:38:17 +01:00 committed by Junio C Hamano
parent dd090a8a37
commit dd432a6ecf
1 changed files with 16 additions and 13 deletions
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29
builtin/name-rev.c
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@ -111,11 +111,6 @@ static void name_rev(struct commit *commit,
struct commit_list *parents;
int parent_number = 1;
parse_commit(commit);
if (commit->date < cutoff)
return;
if (!create_or_update_name(commit, tip_name, taggerdate, generation,
distance, from_tag))
return;
@ -123,6 +118,12 @@ static void name_rev(struct commit *commit,
for (parents = commit->parents;
parents;
parents = parents->next, parent_number++) {
struct commit *parent = parents->item;
parse_commit(parent);
if (parent->date < cutoff)
continue;
if (parent_number > 1) {
size_t len;
char *new_name;
@ -135,11 +136,11 @@ static void name_rev(struct commit *commit,
new_name = xstrfmt("%.*s^%d", (int)len, tip_name,
parent_number);
name_rev(parents->item, new_name, taggerdate, 0,
name_rev(parent, new_name, taggerdate, 0,
distance + MERGE_TRAVERSAL_WEIGHT,
from_tag);
} else {
name_rev(parents->item, tip_name, taggerdate,
name_rev(parent, tip_name, taggerdate,
generation + 1, distance + 1,
from_tag);
}
@ -273,16 +274,18 @@ static int name_ref(const char *path, const struct object_id *oid, int flags, vo
if (o && o->type == OBJ_COMMIT) {
struct commit *commit = (struct commit *)o;
int from_tag = starts_with(path, "refs/tags/");
const char *tip_name;
if (taggerdate == TIME_MAX)
taggerdate = commit->date;
path = name_ref_abbrev(path, can_abbreviate_output);
if (deref)
tip_name = xstrfmt("%s^0", path);
else
tip_name = xstrdup(path);
name_rev(commit, tip_name, taggerdate, 0, 0, from_tag);
if (commit->date >= cutoff) {
const char *tip_name;
if (deref)
tip_name = xstrfmt("%s^0", path);
else
tip_name = xstrdup(path);
name_rev(commit, tip_name, taggerdate, 0, 0, from_tag);
}
}
return 0;
}