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upload-pack: make sure deepening preserves shallow roots

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When "fetch --depth=N" where N exceeds the longest chain of history in
the source repo, usually we just send an "unshallow" line to the
client so full history is obtained.

When the source repo is shallow we need to make sure to "unshallow"
the current shallow point _and_ "shallow" again when the commit
reaches its shallow bottom in the source repo.

This should fix both cases: large <N> and --unshallow.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy 2013-12-05 20:02:41 +07:00 committed by Junio C Hamano
parent 4820a33baa
commit 79d3a236c5
4 changed files with 28 additions and 4 deletions
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8
Documentation/fetch-options.txt
View File

@ -14,8 +14,12 @@
branch history. Tags for the deepened commits are not fetched.
--unshallow::
Convert a shallow repository to a complete one, removing all
the limitations imposed by shallow repositories.
If the source repository is complete, convert a shallow
repository to a complete one, removing all the limitations
imposed by shallow repositories.
+
If the source repository is shallow, fetch as much as possible so that
the current repository has the same history as the source repository.
ifndef::git-pull[]
--dry-run::

6
shallow.c
View File

@ -75,6 +75,7 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
struct commit_list *result = NULL;
struct object_array stack = OBJECT_ARRAY_INIT;
struct commit *commit = NULL;
struct commit_graft *graft;
while (commit || i < heads->nr || stack.nr) {
struct commit_list *p;
@ -99,7 +100,10 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
if (parse_commit(commit))
die("invalid commit");
cur_depth++;
if (cur_depth >= depth) {
if ((depth != INFINITE_DEPTH && cur_depth >= depth) ||
(is_repository_shallow() && !commit->parents &&
(graft = lookup_commit_graft(commit->object.sha1)) != NULL &&
graft->nr_parent < 0)) {
commit_list_insert(commit, &result);
commit->object.flags |= shallow_flag;
commit = NULL;

16
t/t5537-fetch-shallow.sh
View File

@ -79,6 +79,22 @@ EOF
)
'
test_expect_success 'fetch --unshallow from shallow clone' '
(
cd shallow2 &&
git fetch --unshallow &&
git fsck &&
git log --format=%s origin/master >actual &&
cat <<EOF >expect &&
6
5
4
3
EOF
test_cmp expect actual
)
'
test_expect_success 'fetch something upstream has but hidden by clients shallow boundaries' '
# the blob "1" is available in .git but hidden by the
# shallow2/.git/shallow and it should be resent

2
upload-pack.c
View File

@ -619,7 +619,7 @@ static void receive_needs(void)
if (depth > 0) {
struct commit_list *result = NULL, *backup = NULL;
int i;
if (depth == INFINITE_DEPTH)
if (depth == INFINITE_DEPTH && !is_repository_shallow())
for (i = 0; i < shallows.nr; i++) {
struct object *object = shallows.objects[i].item;
object->flags |= NOT_SHALLOW;