From: Johannes Schindelin <johannes.schindelin@xxxxxx>
When `remote.<name>.branch` is not configured, `git submodule update`
currently falls back to using the branch name `master`. A much better
idea, however, is to use `HEAD`: on all Git servers running reasonably
recent Git versions, the symref `HEAD` points to the main branch.
Note: t7419 demonstrates that there _might_ be use cases out there that
_expect_ `git submodule update --remote` to update submodules to the
remote `master` branch even if the remote `HEAD` points to another
branch. Arguably, this patch makes the behavior more intuitive, but
there is a slight possibility that this might cause regressions in
obscure setups.
Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
Documentation/git-submodule.txt | 4 ++--
builtin/submodule--helper.c | 2 +-
t/t7406-submodule-update.sh | 16 ++++++++++++++++
t/t7419-submodule-set-branch.sh | 7 +++++--
4 files changed, 24 insertions(+), 5 deletions(-)
diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt
index c9ed2bf3d5..b20f85e622 100644
--- a/Documentation/git-submodule.txt
+++ b/Documentation/git-submodule.txt
@@ -284,7 +284,7 @@ OPTIONS
`.gitmodules` for `update --remote`. A special value of `.` is used to
indicate that the name of the branch in the submodule should be the
same name as the current branch in the current repository. If the
- option is not specified, it defaults to 'master'.
+ option is not specified, it defaults to 'HEAD'.
-f::
--force::
@@ -322,7 +322,7 @@ OPTIONS
the superproject's recorded SHA-1 to update the submodule, use the
status of the submodule's remote-tracking branch. The remote used
is branch's remote (`branch.<name>.remote`), defaulting to `origin`.
- The remote branch used defaults to `master`, but the branch name may
+ The remote branch used defaults to `HEAD`, but the branch name may
be overridden by setting the `submodule.<name>.branch` option in
either `.gitmodules` or `.git/config` (with `.git/config` taking
precedence).
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 46c03d2a12..f55f7b7704 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -1981,7 +1981,7 @@ static const char *remote_submodule_branch(const char *path)
free(key);
if (!branch)
- return "master";
+ return "HEAD";
if (!strcmp(branch, ".")) {
const char *refname = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
diff --git a/t/t7406-submodule-update.sh b/t/t7406-submodule-update.sh
index 4fb447a143..aa19ff3a2e 100755
--- a/t/t7406-submodule-update.sh
+++ b/t/t7406-submodule-update.sh
@@ -70,6 +70,22 @@ test_expect_success 'setup a submodule tree' '
)
'
+test_expect_success 'update --remote falls back to using HEAD' '
+ test_create_repo main-branch-submodule &&
+ test_commit -C main-branch-submodule initial &&
+
+ test_create_repo main-branch &&
+ git -C main-branch submodule add ../main-branch-submodule &&
+ git -C main-branch commit -m add-submodule &&
+
+ git -C main-branch-submodule switch -c hello &&
+ test_commit -C main-branch-submodule world &&
+
+ git clone --recursive main-branch main-branch-clone &&
+ git -C main-branch-clone submodule update --remote main-branch-submodule &&
+ test_path_exists main-branch-clone/main-branch-submodule/world.t
+'
+
test_expect_success 'submodule update detaching the HEAD ' '
(cd super/submodule &&
git reset --hard HEAD~1
diff --git a/t/t7419-submodule-set-branch.sh b/t/t7419-submodule-set-branch.sh
index fd25f786a3..3b925c302f 100755
--- a/t/t7419-submodule-set-branch.sh
+++ b/t/t7419-submodule-set-branch.sh
@@ -52,12 +52,13 @@ test_expect_success 'test submodule set-branch --branch' '
'
test_expect_success 'test submodule set-branch --default' '
+ test_commit -C submodule c &&
(cd super &&
git submodule set-branch --default submodule &&
! grep branch .gitmodules &&
git submodule update --remote &&
cat <<-\EOF >expect &&
- a
+ c
EOF
git -C submodule show -s --pretty=%s >actual &&
test_cmp expect actual
@@ -65,6 +66,7 @@ test_expect_success 'test submodule set-branch --default' '
'
test_expect_success 'test submodule set-branch -b' '
+ test_commit -C submodule b &&
(cd super &&
git submodule set-branch -b topic submodule &&
grep "branch = topic" .gitmodules &&
@@ -78,12 +80,13 @@ test_expect_success 'test submodule set-branch -b' '
'
test_expect_success 'test submodule set-branch -d' '
+ test_commit -C submodule d &&
(cd super &&
git submodule set-branch -d submodule &&
! grep branch .gitmodules &&
git submodule update --remote &&
cat <<-\EOF >expect &&
- a
+ d
EOF
git -C submodule show -s --pretty=%s >actual &&
test_cmp expect actual
--
gitgitgadget
