2015-10-02 13:55:31 +02:00
|
|
|
#include "cache.h"
|
|
|
|
#include "refs.h"
|
|
|
|
#include "strbuf.h"
|
|
|
|
#include "worktree.h"
|
|
|
|
|
2015-10-08 19:01:02 +02:00
|
|
|
/*
|
|
|
|
* read 'path_to_ref' into 'ref'. Also if is_detached is not NULL,
|
|
|
|
* set is_detached to 1 (0) if the ref is detatched (is not detached).
|
|
|
|
*
|
|
|
|
* $GIT_COMMON_DIR/$symref (e.g. HEAD) is practically outside $GIT_DIR so
|
|
|
|
* for linked worktrees, `resolve_ref_unsafe()` won't work (it uses
|
|
|
|
* git_path). Parse the ref ourselves.
|
|
|
|
*
|
|
|
|
* return -1 if the ref is not a proper ref, 0 otherwise (success)
|
|
|
|
*/
|
|
|
|
static int parse_ref(char *path_to_ref, struct strbuf *ref, int *is_detached)
|
|
|
|
{
|
|
|
|
if (is_detached)
|
|
|
|
*is_detached = 0;
|
|
|
|
if (!strbuf_readlink(ref, path_to_ref, 0)) {
|
|
|
|
/* HEAD is symbolic link */
|
|
|
|
if (!starts_with(ref->buf, "refs/") ||
|
|
|
|
check_refname_format(ref->buf, 0))
|
|
|
|
return -1;
|
|
|
|
} else if (strbuf_read_file(ref, path_to_ref, 0) >= 0) {
|
|
|
|
/* textual symref or detached */
|
|
|
|
if (!starts_with(ref->buf, "ref:")) {
|
|
|
|
if (is_detached)
|
|
|
|
*is_detached = 1;
|
|
|
|
} else {
|
|
|
|
strbuf_remove(ref, 0, strlen("ref:"));
|
|
|
|
strbuf_trim(ref);
|
|
|
|
if (check_refname_format(ref->buf, 0))
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
return -1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static char *find_main_symref(const char *symref, const char *branch)
|
|
|
|
{
|
|
|
|
struct strbuf sb = STRBUF_INIT;
|
|
|
|
struct strbuf path = STRBUF_INIT;
|
|
|
|
struct strbuf gitdir = STRBUF_INIT;
|
|
|
|
char *existing = NULL;
|
|
|
|
|
|
|
|
strbuf_addf(&path, "%s/%s", get_git_common_dir(), symref);
|
|
|
|
if (parse_ref(path.buf, &sb, NULL) < 0)
|
|
|
|
goto done;
|
|
|
|
if (strcmp(sb.buf, branch))
|
|
|
|
goto done;
|
|
|
|
strbuf_addstr(&gitdir, get_git_common_dir());
|
|
|
|
strbuf_strip_suffix(&gitdir, ".git");
|
|
|
|
existing = strbuf_detach(&gitdir, NULL);
|
|
|
|
done:
|
|
|
|
strbuf_release(&path);
|
|
|
|
strbuf_release(&sb);
|
|
|
|
strbuf_release(&gitdir);
|
|
|
|
|
|
|
|
return existing;
|
|
|
|
}
|
|
|
|
|
2015-10-02 13:55:31 +02:00
|
|
|
static char *find_linked_symref(const char *symref, const char *branch,
|
|
|
|
const char *id)
|
|
|
|
{
|
|
|
|
struct strbuf sb = STRBUF_INIT;
|
|
|
|
struct strbuf path = STRBUF_INIT;
|
|
|
|
struct strbuf gitdir = STRBUF_INIT;
|
|
|
|
char *existing = NULL;
|
|
|
|
|
2015-10-08 19:01:02 +02:00
|
|
|
if (!id)
|
|
|
|
die("Missing linked worktree name");
|
2015-10-02 13:55:31 +02:00
|
|
|
|
2015-10-08 19:01:02 +02:00
|
|
|
strbuf_addf(&path, "%s/worktrees/%s/%s", get_git_common_dir(), id, symref);
|
|
|
|
|
|
|
|
if (parse_ref(path.buf, &sb, NULL) < 0)
|
2015-10-02 13:55:31 +02:00
|
|
|
goto done;
|
|
|
|
if (strcmp(sb.buf, branch))
|
|
|
|
goto done;
|
2015-10-08 19:01:02 +02:00
|
|
|
strbuf_reset(&path);
|
|
|
|
strbuf_addf(&path, "%s/worktrees/%s/gitdir", get_git_common_dir(), id);
|
|
|
|
if (strbuf_read_file(&gitdir, path.buf, 0) <= 0)
|
|
|
|
goto done;
|
|
|
|
strbuf_rtrim(&gitdir);
|
2015-10-02 13:55:31 +02:00
|
|
|
strbuf_strip_suffix(&gitdir, ".git");
|
|
|
|
|
|
|
|
existing = strbuf_detach(&gitdir, NULL);
|
|
|
|
done:
|
|
|
|
strbuf_release(&path);
|
|
|
|
strbuf_release(&sb);
|
|
|
|
strbuf_release(&gitdir);
|
|
|
|
|
|
|
|
return existing;
|
|
|
|
}
|
|
|
|
|
|
|
|
char *find_shared_symref(const char *symref, const char *target)
|
|
|
|
{
|
|
|
|
struct strbuf path = STRBUF_INIT;
|
|
|
|
DIR *dir;
|
|
|
|
struct dirent *d;
|
|
|
|
char *existing;
|
|
|
|
|
2015-10-08 19:01:02 +02:00
|
|
|
if ((existing = find_main_symref(symref, target)))
|
2015-10-02 13:55:31 +02:00
|
|
|
return existing;
|
|
|
|
|
|
|
|
strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
|
|
|
|
dir = opendir(path.buf);
|
|
|
|
strbuf_release(&path);
|
|
|
|
if (!dir)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
while ((d = readdir(dir)) != NULL) {
|
|
|
|
if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
|
|
|
|
continue;
|
|
|
|
existing = find_linked_symref(symref, target, d->d_name);
|
|
|
|
if (existing)
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
done:
|
|
|
|
closedir(dir);
|
|
|
|
|
|
|
|
return existing;
|
|
|
|
}
|