In 06bf4ad1d (push: propagate remote and refspec with
--recurse-submodules) push was taught how to propagate a refspec down to
submodules when the '--recurse-submodules' flag is given. The only refspecs
that are allowed to be propagated are ones which name a ref which exists
in both the superproject and the submodule, with the caveat that 'HEAD'
was disallowed.
This patch teaches push-check (the submodule helper which determines if
a refspec can be propagated to a submodule) to permit propagating 'HEAD'
if and only if the superproject and the submodule both have the same
named branch checked out and the submodule is not in a detached head
state.
Signed-off-by: Brandon Williams <bmwill@xxxxxxxxxx>
---
builtin/submodule--helper.c | 57 +++++++++++++++++++++++++++++++-----------
submodule.c | 18 ++++++++++---
t/t5531-deep-submodule-push.sh | 25 +++++++++++++++++-
3 files changed, 82 insertions(+), 18 deletions(-)
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 1b4d2b346..fd5020036 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -1107,24 +1107,41 @@ static int resolve_remote_submodule_branch(int argc, const char **argv,
static int push_check(int argc, const char **argv, const char *prefix)
{
struct remote *remote;
+ const char *superproject_head;
+ char *head;
+ int detached_head = 0;
+ struct object_id head_oid;
- if (argc < 2)
- die("submodule--helper push-check requires at least 1 argument");
+ if (argc < 3)
+ die("submodule--helper push-check requires at least 2 argument");
+
+ /*
+ * superproject's resolved head ref.
+ * if HEAD then the superproject is in a detached head state, otherwise
+ * it will be the resolved head ref.
+ */
+ superproject_head = argv[1];
+ /* Get the submodule's head ref and determine if it is detached */
+ head = resolve_refdup("HEAD", 0, head_oid.hash, NULL);
+ if (!head)
+ die(_("Failed to resolve HEAD as a valid ref."));
+ if (!strcmp(head, "HEAD"))
+ detached_head = 1;
/*
* The remote must be configured.
* This is to avoid pushing to the exact same URL as the parent.
*/
- remote = pushremote_get(argv[1]);
+ remote = pushremote_get(argv[2]);
if (!remote || remote->origin == REMOTE_UNCONFIGURED)
- die("remote '%s' not configured", argv[1]);
+ die("remote '%s' not configured", argv[2]);
/* Check the refspec */
- if (argc > 2) {
- int i, refspec_nr = argc - 2;
+ if (argc > 3) {
+ int i, refspec_nr = argc - 3;
struct ref *local_refs = get_local_heads();
struct refspec *refspec = parse_push_refspec(refspec_nr,
- argv + 2);
+ argv + 3);
for (i = 0; i < refspec_nr; i++) {
struct refspec *rs = refspec + i;
@@ -1132,18 +1149,30 @@ static int push_check(int argc, const char **argv, const char *prefix)
if (rs->pattern || rs->matching)
continue;
- /*
- * LHS must match a single ref
- * NEEDSWORK: add logic to special case 'HEAD' once
- * working with submodules in a detached head state
- * ceases to be the norm.
- */
- if (count_refspec_match(rs->src, local_refs, NULL) != 1)
+ /* LHS must match a single ref */
+ switch(count_refspec_match(rs->src, local_refs, NULL)) {
+ case 1:
+ break;
+ case 0:
+ /*
+ * If LHS matches 'HEAD' then we need to ensure
+ * that it matches the same named branch
+ * checked out in the superproject.
+ */
+ if (!strcmp(rs->src, "HEAD")) {
+ if (!detached_head &&
+ !strcmp(head, superproject_head))
+ break;
+ die("HEAD does not match the named branch in the superproject");
+ }
+ default:
die("src refspec '%s' must name a ref",
rs->src);
+ }
}
free_refspec(refspec_nr, refspec);
}
+ free(head);
return 0;
}
diff --git a/submodule.c b/submodule.c
index 1b8a3b575..920b49328 100644
--- a/submodule.c
+++ b/submodule.c
@@ -1003,7 +1003,8 @@ static int push_submodule(const char *path,
* Perform a check in the submodule to see if the remote and refspec work.
* Die if the submodule can't be pushed.
*/
-static void submodule_push_check(const char *path, const struct remote *remote,
+static void submodule_push_check(const char *path, const char *head,
+ const struct remote *remote,
const char **refspec, int refspec_nr)
{
struct child_process cp = CHILD_PROCESS_INIT;
@@ -1011,6 +1012,7 @@ static void submodule_push_check(const char *path, const struct remote *remote,
argv_array_push(&cp.args, "submodule--helper");
argv_array_push(&cp.args, "push-check");
+ argv_array_push(&cp.args, head);
argv_array_push(&cp.args, remote->name);
for (i = 0; i < refspec_nr; i++)
@@ -1049,10 +1051,20 @@ int push_unpushed_submodules(struct oid_array *commits,
* won't be propagated due to the remote being unconfigured (e.g. a URL
* instead of a remote name).
*/
- if (remote->origin != REMOTE_UNCONFIGURED)
+ if (remote->origin != REMOTE_UNCONFIGURED) {
+ char *head;
+ struct object_id head_oid;
+
+ head = resolve_refdup("HEAD", 0, head_oid.hash, NULL);
+ if (!head)
+ die(_("Failed to resolve HEAD as a valid ref."));
+
for (i = 0; i < needs_pushing.nr; i++)
submodule_push_check(needs_pushing.items[i].string,
- remote, refspec, refspec_nr);
+ head, remote,
+ refspec, refspec_nr);
+ free(head);
+ }
/* Actually push the submodules */
for (i = 0; i < needs_pushing.nr; i++) {
diff --git a/t/t5531-deep-submodule-push.sh b/t/t5531-deep-submodule-push.sh
index beff65b8a..0f84a5314 100755
--- a/t/t5531-deep-submodule-push.sh
+++ b/t/t5531-deep-submodule-push.sh
@@ -533,7 +533,8 @@ test_expect_success 'push propagating refspec to a submodule' '
# Fails when refspec includes an object id
test_must_fail git -C work push --recurse-submodules=on-demand origin \
"$(git -C work rev-parse branch2):refs/heads/branch2" &&
- # Fails when refspec includes 'HEAD' as it is unsupported at this time
+ # Fails when refspec includes HEAD and parent and submodule do not
+ # have the same named branch checked out
test_must_fail git -C work push --recurse-submodules=on-demand origin \
HEAD:refs/heads/branch2 &&
@@ -548,4 +549,26 @@ test_expect_success 'push propagating refspec to a submodule' '
test_cmp expected_pub actual_pub
'
+test_expect_success 'push propagating HEAD refspec to a submodule' '
+ git -C work/gar/bage checkout branch2 &&
+ > work/gar/bage/junk12 &&
+ git -C work/gar/bage add junk12 &&
+ git -C work/gar/bage commit -m "Twelfth junk" &&
+
+ git -C work checkout branch2 &&
+ git -C work add gar/bage &&
+ git -C work commit -m "updating gar/bage in branch2" &&
+
+ # Passes since the superproject and submodules HEAD are both on branch2
+ git -C work push --recurse-submodules=on-demand origin \
+ HEAD:refs/heads/branch2 &&
+
+ git -C submodule.git rev-parse branch2 >actual_submodule &&
+ git -C pub.git rev-parse branch2 >actual_pub &&
+ git -C work/gar/bage rev-parse branch2 >expected_submodule &&
+ git -C work rev-parse branch2 >expected_pub &&
+ test_cmp expected_submodule actual_submodule &&
+ test_cmp expected_pub actual_pub
+'
+
test_done
--
2.13.1.704.gde00cce3c-goog
