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Merge branch 'en/name-rev-shorter-output' 

"git name-rev" has been tweaked to give output that is shorter and
easier to understand.

* en/name-rev-shorter-output:
  name-rev: prefer shorter names over following merges
maint
Junio C Hamano 2021-12-21 15:03:16 -08:00
parent 13fa77b689 3656f84278
commit 3f9d5059c6
1 changed files with 13 additions and 4 deletions
builtin

17
builtin/name-rev.c
View File

@ -44,11 +44,20 @@ static struct rev_name *get_commit_rev_name(const struct commit *commit)
return is_valid_rev_name(name) ? name : NULL;
}

static int effective_distance(int distance, int generation)
{
return distance + (generation > 0 ? MERGE_TRAVERSAL_WEIGHT : 0);
}

static int is_better_name(struct rev_name *name,
timestamp_t taggerdate,
int generation,
int distance,
int from_tag)
{
int name_distance = effective_distance(name->distance, name->generation);
int new_distance = effective_distance(distance, generation);

/*
* When comparing names based on tags, prefer names
* based on the older tag, even if it is farther away.
@ -56,7 +65,7 @@ static int is_better_name(struct rev_name *name,
if (from_tag && name->from_tag)
return (name->taggerdate > taggerdate ||
(name->taggerdate == taggerdate &&
name->distance > distance));
name_distance > new_distance));

/*
* We know that at least one of them is a non-tag at this point.
@ -69,8 +78,8 @@ static int is_better_name(struct rev_name *name,
* We are now looking at two non-tags. Tiebreak to favor
* shorter hops.
*/
if (name->distance != distance)
return name->distance > distance;
if (name_distance != new_distance)
return name_distance > new_distance;

/* ... or tiebreak to favor older date */
if (name->taggerdate != taggerdate)
@ -88,7 +97,7 @@ static struct rev_name *create_or_update_name(struct commit *commit,
struct rev_name *name = commit_rev_name_at(&rev_names, commit);

if (is_valid_rev_name(name)) {
if (!is_better_name(name, taggerdate, distance, from_tag))
if (!is_better_name(name, taggerdate, generation, distance, from_tag))
return NULL;

/*