Add the --exclude-path-first-parent flag,
which works similarly to --first-parent,
but affects only the graph traversal for
the set of commits being excluded.
-A-------E-HEAD
\ /
B-C-D
In this example, the goal is to return the
set {B, C, D} which represents a working
branch that has been merged into main branch
E. `git rev-list D ^E` will end up returning
no commits since the exclude path eliminates
D and its ancestors.
`git rev-list --exclude-path-first-parent D ^E`
however will return {B, C, D} as desired.
Add docs for the new flag, and clarify the
doc for --first-parent to indicate that it
applies to traversing the set of included
commits only. The semantics of existing flags
however have not changed.
Signed-off-by: Jerry Zhang <jerry@xxxxxxxxxx>
---
Documentation/rev-list-options.txt | 21 ++++++++++++++-------
blame.c | 2 +-
revision.c | 30 ++++++++++++++++++++----------
revision.h | 3 ++-
shallow.c | 2 +-
t/t6012-rev-list-simplify.sh | 18 ++++++++++++------
6 files changed, 50 insertions(+), 26 deletions(-)
diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt
index b1c8f86c6e..681d6649b4 100644
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt
@@ -122,19 +122,26 @@ again. Equivalent forms are `--min-parents=0` (any commit has 0 or more
parents) and `--max-parents=-1` (negative numbers denote no upper limit).
--first-parent::
- Follow only the first parent commit upon seeing a merge
- commit. This option can give a better overview when
- viewing the evolution of a particular topic branch,
- because merges into a topic branch tend to be only about
- adjusting to updated upstream from time to time, and
- this option allows you to ignore the individual commits
- brought in to your history by such a merge.
+ When finding commits to include, follow only the first
+ parent commit upon seeing a merge commit. This option
+ can give a better overview when viewing the evolution of
+ a particular topic branch, because merges into a topic
+ branch tend to be only about adjusting to updated upstream
+ from time to time, and this option allows you to ignore
+ the individual commits brought in to your history by such
+ a merge.
ifdef::git-log[]
+
This option also changes default diff format for merge commits
to `first-parent`, see `--diff-merges=first-parent` for details.
endif::git-log[]
+--exclude-path-first-parent::
+ When finding commits to exclude, follow only the first
+ parent commit upon seeing a merge commit. This causes
+ exclusions to exclude only commits on that branch itself
+ and not those brought in by a merge.
+
--not::
Reverses the meaning of the '{caret}' prefix (or lack thereof)
for all following revision specifiers, up to the next `--not`.
diff --git a/blame.c b/blame.c
index 5018bb8fb2..8354dc0252 100644
--- a/blame.c
+++ b/blame.c
@@ -2615,7 +2615,7 @@ void assign_blame(struct blame_scoreboard *sb, int opt)
else {
commit->object.flags |= UNINTERESTING;
if (commit->object.parsed)
- mark_parents_uninteresting(commit);
+ mark_parents_uninteresting(sb->revs, commit);
}
/* treat root commit as boundary */
if (!commit->parents && !sb->show_root)
diff --git a/revision.c b/revision.c
index 553c0faa9b..e1deb3f194 100644
--- a/revision.c
+++ b/revision.c
@@ -268,7 +268,7 @@ static void commit_stack_clear(struct commit_stack *stack)
stack->nr = stack->alloc = 0;
}
-static void mark_one_parent_uninteresting(struct commit *commit,
+static void mark_one_parent_uninteresting(struct rev_info *revs, struct commit *commit,
struct commit_stack *pending)
{
struct commit_list *l;
@@ -285,20 +285,26 @@ static void mark_one_parent_uninteresting(struct commit *commit,
* wasn't uninteresting), in which case we need
* to mark its parents recursively too..
*/
- for (l = commit->parents; l; l = l->next)
+ for (l = commit->parents; l; l = l->next) {
commit_stack_push(pending, l->item);
+ if (revs && revs->exclude_path_first_parent_only)
+ break;
+ }
}
-void mark_parents_uninteresting(struct commit *commit)
+void mark_parents_uninteresting(struct rev_info *revs, struct commit *commit)
{
struct commit_stack pending = COMMIT_STACK_INIT;
struct commit_list *l;
- for (l = commit->parents; l; l = l->next)
- mark_one_parent_uninteresting(l->item, &pending);
+ for (l = commit->parents; l; l = l->next) {
+ mark_one_parent_uninteresting(revs, l->item, &pending);
+ if (revs && revs->exclude_path_first_parent_only)
+ break;
+ }
while (pending.nr > 0)
- mark_one_parent_uninteresting(commit_stack_pop(&pending),
+ mark_one_parent_uninteresting(revs, commit_stack_pop(&pending),
&pending);
commit_stack_clear(&pending);
@@ -437,7 +443,7 @@ static struct commit *handle_commit(struct rev_info *revs,
if (repo_parse_commit(revs->repo, commit) < 0)
die("unable to parse commit %s", name);
if (flags & UNINTERESTING) {
- mark_parents_uninteresting(commit);
+ mark_parents_uninteresting(revs, commit);
if (!revs->topo_order || !generation_numbers_enabled(the_repository))
revs->limited = 1;
@@ -1120,7 +1126,7 @@ static int process_parents(struct rev_info *revs, struct commit *commit,
if (repo_parse_commit_gently(revs->repo, p, 1) < 0)
continue;
if (p->parents)
- mark_parents_uninteresting(p);
+ mark_parents_uninteresting(revs, p);
if (p->object.flags & SEEN)
continue;
p->object.flags |= SEEN;
@@ -1128,6 +1134,8 @@ static int process_parents(struct rev_info *revs, struct commit *commit,
commit_list_insert_by_date(p, list);
if (queue)
prio_queue_put(queue, p);
+ if (revs->exclude_path_first_parent_only)
+ break;
}
return 0;
}
@@ -1418,7 +1426,7 @@ static int limit_list(struct rev_info *revs)
if (process_parents(revs, commit, &list, NULL) < 0)
return -1;
if (obj->flags & UNINTERESTING) {
- mark_parents_uninteresting(commit);
+ mark_parents_uninteresting(revs, commit);
slop = still_interesting(list, date, slop, &interesting_cache);
if (slop)
continue;
@@ -2214,6 +2222,8 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
return argcount;
} else if (!strcmp(arg, "--first-parent")) {
revs->first_parent_only = 1;
+ } else if (!strcmp(arg, "--exclude-path-first-parent")) {
+ revs->exclude_path_first_parent_only = 1;
} else if (!strcmp(arg, "--ancestry-path")) {
revs->ancestry_path = 1;
revs->simplify_history = 0;
@@ -3341,7 +3351,7 @@ static void explore_walk_step(struct rev_info *revs)
return;
if (c->object.flags & UNINTERESTING)
- mark_parents_uninteresting(c);
+ mark_parents_uninteresting(revs, c);
for (p = c->parents; p; p = p->next)
test_flag_and_insert(&info->explore_queue, p->item, TOPO_WALK_EXPLORED);
diff --git a/revision.h b/revision.h
index a24f72dcd1..712710ed62 100644
--- a/revision.h
+++ b/revision.h
@@ -164,6 +164,7 @@ struct rev_info {
bisect:1,
ancestry_path:1,
first_parent_only:1,
+ exclude_path_first_parent_only:1,
line_level_traverse:1,
tree_blobs_in_commit_order:1,
@@ -405,7 +406,7 @@ const char *get_revision_mark(const struct rev_info *revs,
void put_revision_mark(const struct rev_info *revs,
const struct commit *commit);
-void mark_parents_uninteresting(struct commit *commit);
+void mark_parents_uninteresting(struct rev_info *revs, struct commit *commit);
void mark_tree_uninteresting(struct repository *r, struct tree *tree);
void mark_trees_uninteresting_sparse(struct repository *r, struct oidset *trees);
diff --git a/shallow.c b/shallow.c
index 9ed18eb884..71e5876f37 100644
--- a/shallow.c
+++ b/shallow.c
@@ -603,7 +603,7 @@ static int mark_uninteresting(const char *refname, const struct object_id *oid,
if (!commit)
return 0;
commit->object.flags |= UNINTERESTING;
- mark_parents_uninteresting(commit);
+ mark_parents_uninteresting(NULL, commit);
return 0;
}
diff --git a/t/t6012-rev-list-simplify.sh b/t/t6012-rev-list-simplify.sh
index 4f7fa8b6c0..aa8220f3a4 100755
--- a/t/t6012-rev-list-simplify.sh
+++ b/t/t6012-rev-list-simplify.sh
@@ -16,13 +16,12 @@ unnote () {
}
#
-# Create a test repo with interesting commit graph:
+# Create a test repo with an interesting commit graph:
#
-# A--B----------G--H--I--K--L
-# \ \ / /
-# \ \ / /
-# C------E---F J
-# \_/
+# A-----B-----G--H--I--K--L
+# \ \ / /
+# \ \ / /
+# C--D--E--F J
#
# The commits are laid out from left-to-right starting with
# the root commit A and terminating at the tip commit L.
@@ -142,6 +141,13 @@ check_result 'I B A' --author-date-order -- file
check_result 'H' --first-parent -- another-file
check_result 'H' --first-parent --topo-order -- another-file
+check_result 'L K I H G B A' --first-parent L
+check_result 'F E D C' --exclude-path-first-parent F ^L
+check_result '' F ^L
+check_result 'L K I H G J' L ^F
+check_result 'L K I H G B J' --exclude-path-first-parent L ^F
+check_result 'L K I H G B' --exclude-path-first-parent --first-parent L ^F
+
check_result 'E C B A' --full-history E -- lost
test_expect_success 'full history simplification without parent' '
printf "%s\n" E C B A >expect &&
--
2.29.0
