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branch: implement git_branch_is_checked_out

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Implement a new function that is able to determine if a branch is
checked out in any repository connected to the current
repository. In particular, this is required to check if for a
given repository and branch, there exists any working tree
connected to that repository that is referencing this branch.
This commit is contained in:
Patrick Steinhardt 2015-11-06 12:08:15 +01:00
parent 4321595dcb
commit e3acd37b70
2 changed files with 69 additions and 0 deletions
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12
include/git2/branch.h
View File

@ -245,6 +245,18 @@ GIT_EXTERN(int) git_branch_upstream_name(
GIT_EXTERN(int) git_branch_is_head(
const git_reference *branch);
/**
* Determine if the current branch is checked out in any linked
* repository.
*
* @param branch Reference to the branch.
*
* @return 1 if branch is checked out, 0 if it isn't,
* error code otherwise.
*/
GIT_EXTERN(int) git_branch_is_checked_out(
const git_reference *branch);
/**
* Return the name of remote that the remote tracking branch belongs to.
*

57
src/branch.c
View File

@ -13,6 +13,7 @@
#include "refs.h"
#include "remote.h"
#include "annotated_commit.h"
#include "worktree.h"
#include "git2/branch.h"
@ -126,6 +127,62 @@ int git_branch_create_from_annotated(
repository, branch_name, commit->commit, commit->description, force);
}
int git_branch_is_checked_out(
const git_reference *branch)
{
git_buf path = GIT_BUF_INIT, buf = GIT_BUF_INIT;
git_strarray worktrees;
git_reference *ref = NULL;
git_repository *repo;
const char *worktree;
int found = false;
size_t i;
assert(branch && git_reference_is_branch(branch));
repo = git_reference_owner(branch);
if (git_worktree_list(&worktrees, repo) < 0)
return -1;
for (i = 0; i < worktrees.count; i++) {
worktree = worktrees.strings[i];
if (git_repository_head_for_worktree(&ref, repo, worktree) < 0)
continue;
if (git__strcmp(ref->name, branch->name) == 0) {
found = true;
git_reference_free(ref);
break;
}
git_reference_free(ref);
}
git_strarray_free(&worktrees);
if (found)
return found;
/* Check HEAD of parent */
if (git_buf_joinpath(&path, repo->commondir, GIT_HEAD_FILE) < 0)
goto out;
if (git_futils_readbuffer(&buf, path.ptr) < 0)
goto out;
if (git__prefixcmp(buf.ptr, "ref: ") == 0)
git_buf_consume(&buf, buf.ptr + strlen("ref: "));
git_buf_rtrim(&buf);
found = git__strcmp(buf.ptr, branch->name) == 0;
out:
git_buf_free(&buf);
git_buf_free(&path);
return found;
}
int git_branch_delete(git_reference *branch)
{
int is_head;