[PATCH v3 2/2] branch -m: update all per-worktree HEADs
From: Kazuki Yamaguchi <hidden>
Date: 2016-06-15 23:09:04
Subsystem:
the rest · Maintainer:
Linus Torvalds
When renaming a branch, currently only the HEAD of current working tree is updated, but it must update HEADs of all working trees which point at the old branch. This is the current behavior, /path/to/wt's HEAD is not updated: % git worktree list /path/to 2c3c5f2 [master] /path/to/wt 2c3c5f2 [oldname] % git branch -m master master2 % git worktree list /path/to 2c3c5f2 [master2] /path/to/wt 2c3c5f2 [oldname] % git branch -m oldname newname % git worktree list /path/to 2c3c5f2 [master2] /path/to/wt 0000000 [oldname] This patch fixes this issue by updating all relevant worktree HEADs when renaming a branch. Signed-off-by: Kazuki Yamaguchi <redacted> --- branch.c | 23 +++++++++++++++++++++++ branch.h | 7 +++++++ builtin/branch.c | 3 +-- t/t3200-branch.sh | 23 ++++++++++++++++++++++- 4 files changed, 53 insertions(+), 3 deletions(-)
diff --git a/branch.c b/branch.c
index c50ea42172ce..416244370783 100644
--- a/branch.c
+++ b/branch.c@@ -344,3 +344,26 @@ void die_if_checked_out(const char *branch) die(_("'%s' is already checked out at '%s'"), branch, existing); } } + +int replace_each_worktree_head_symref(const char *oldref, const char *newref) +{ + int ret = 0; + struct worktree **worktrees = get_worktrees(); + int i; + + for (i = 0; worktrees[i]; i++) { + if (worktrees[i]->is_detached) + continue; + if (strcmp(oldref, worktrees[i]->head_ref)) + continue; + + if (set_worktree_head_symref(worktrees[i]->git_dir, newref)) { + ret = -1; + error(_("HEAD of working tree %s is not updated"), + worktrees[i]->path); + } + } + + free_worktrees(worktrees); + return ret; +}
diff --git a/branch.h b/branch.h
index 78ad4387cd32..d69163daf793 100644
--- a/branch.h
+++ b/branch.h@@ -60,4 +60,11 @@ extern int read_branch_desc(struct strbuf *, const char *branch_name); */ extern void die_if_checked_out(const char *branch); +/* + * Update all per-worktree HEADs pointing at the old ref to point the new ref. + * This will be used when renaming a branch. Returns 0 if successful, non-zero + * otherwise. + */ +extern int replace_each_worktree_head_symref(const char *oldref, const char *newref); + #endif
diff --git a/builtin/branch.c b/builtin/branch.c
index 7b45b6bd6b80..b1738313175c 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c@@ -552,8 +552,7 @@ static void rename_branch(const char *oldname, const char *newname, int force) if (recovery) warning(_("Renamed a misnamed branch '%s' away"), oldref.buf + 11); - /* no need to pass logmsg here as HEAD didn't really move */ - if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL)) + if (replace_each_worktree_head_symref(oldref.buf, newref.buf)) die(_("Branch renamed to %s, but HEAD is not updated!"), newname); strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index a89724849065..f7d438bd7d1d 100755
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh@@ -126,7 +126,28 @@ test_expect_success 'git branch -M foo bar should fail when bar is checked out' test_expect_success 'git branch -M baz bam should succeed when baz is checked out' ' git checkout -b baz && git branch bam && - git branch -M baz bam + git branch -M baz bam && + test $(git rev-parse --abbrev-ref HEAD) = bam +' + +test_expect_success 'git branch -M baz bam should succeed when baz is checked out as linked working tree' ' + git checkout master && + git worktree add -b baz bazdir && + git worktree add -f bazdir2 baz && + git branch -M baz bam && + test $(git -C bazdir rev-parse --abbrev-ref HEAD) = bam && + test $(git -C bazdir2 rev-parse --abbrev-ref HEAD) = bam +' + +test_expect_success 'git branch -M baz bam should succeed within a worktree in which baz is checked out' ' + git checkout -b baz && + git worktree add -f bazdir3 baz && + ( + cd bazdir3 && + git branch -M baz bam && + test $(git rev-parse --abbrev-ref HEAD) = bam + ) && + test $(git rev-parse --abbrev-ref HEAD) = bam ' test_expect_success 'git branch -M master should work when master is checked out' '
--
2.8.0.rc4.21.g05df949