| #include "cache.h" |
| #include "repository.h" |
| #include "refs.h" |
| #include "strbuf.h" |
| #include "worktree.h" |
| #include "dir.h" |
| #include "wt-status.h" |
| |
| void free_worktrees(struct worktree **worktrees) |
| { |
| int i = 0; |
| |
| for (i = 0; worktrees[i]; i++) { |
| free(worktrees[i]->path); |
| free(worktrees[i]->id); |
| free(worktrees[i]->head_ref); |
| free(worktrees[i]->lock_reason); |
| free(worktrees[i]); |
| } |
| free (worktrees); |
| } |
| |
| /** |
| * Update head_sha1, head_ref and is_detached of the given worktree |
| */ |
| static void add_head_info(struct worktree *wt) |
| { |
| int flags; |
| const char *target; |
| |
| target = refs_resolve_ref_unsafe(get_worktree_ref_store(wt), |
| "HEAD", |
| 0, |
| &wt->head_oid, &flags); |
| if (!target) |
| return; |
| |
| if (flags & REF_ISSYMREF) |
| wt->head_ref = xstrdup(target); |
| else |
| wt->is_detached = 1; |
| } |
| |
| /** |
| * get the main worktree |
| */ |
| static struct worktree *get_main_worktree(void) |
| { |
| struct worktree *worktree = NULL; |
| struct strbuf path = STRBUF_INIT; |
| struct strbuf worktree_path = STRBUF_INIT; |
| int is_bare = 0; |
| |
| strbuf_add_absolute_path(&worktree_path, get_git_common_dir()); |
| is_bare = !strbuf_strip_suffix(&worktree_path, "/.git"); |
| if (is_bare) |
| strbuf_strip_suffix(&worktree_path, "/."); |
| |
| strbuf_addf(&path, "%s/HEAD", get_git_common_dir()); |
| |
| worktree = xcalloc(1, sizeof(*worktree)); |
| worktree->path = strbuf_detach(&worktree_path, NULL); |
| worktree->is_bare = is_bare; |
| add_head_info(worktree); |
| |
| strbuf_release(&path); |
| strbuf_release(&worktree_path); |
| return worktree; |
| } |
| |
| static struct worktree *get_linked_worktree(const char *id) |
| { |
| struct worktree *worktree = NULL; |
| struct strbuf path = STRBUF_INIT; |
| struct strbuf worktree_path = STRBUF_INIT; |
| |
| if (!id) |
| die("Missing linked worktree name"); |
| |
| strbuf_git_common_path(&path, the_repository, "worktrees/%s/gitdir", id); |
| if (strbuf_read_file(&worktree_path, path.buf, 0) <= 0) |
| /* invalid gitdir file */ |
| goto done; |
| |
| strbuf_rtrim(&worktree_path); |
| if (!strbuf_strip_suffix(&worktree_path, "/.git")) { |
| strbuf_reset(&worktree_path); |
| strbuf_add_absolute_path(&worktree_path, "."); |
| strbuf_strip_suffix(&worktree_path, "/."); |
| } |
| |
| strbuf_reset(&path); |
| strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id); |
| |
| worktree = xcalloc(1, sizeof(*worktree)); |
| worktree->path = strbuf_detach(&worktree_path, NULL); |
| worktree->id = xstrdup(id); |
| add_head_info(worktree); |
| |
| done: |
| strbuf_release(&path); |
| strbuf_release(&worktree_path); |
| return worktree; |
| } |
| |
| static void mark_current_worktree(struct worktree **worktrees) |
| { |
| char *git_dir = absolute_pathdup(get_git_dir()); |
| int i; |
| |
| for (i = 0; worktrees[i]; i++) { |
| struct worktree *wt = worktrees[i]; |
| const char *wt_git_dir = get_worktree_git_dir(wt); |
| |
| if (!fspathcmp(git_dir, absolute_path(wt_git_dir))) { |
| wt->is_current = 1; |
| break; |
| } |
| } |
| free(git_dir); |
| } |
| |
| static int compare_worktree(const void *a_, const void *b_) |
| { |
| const struct worktree *const *a = a_; |
| const struct worktree *const *b = b_; |
| return fspathcmp((*a)->path, (*b)->path); |
| } |
| |
| struct worktree **get_worktrees(unsigned flags) |
| { |
| struct worktree **list = NULL; |
| struct strbuf path = STRBUF_INIT; |
| DIR *dir; |
| struct dirent *d; |
| int counter = 0, alloc = 2; |
| |
| ALLOC_ARRAY(list, alloc); |
| |
| list[counter++] = get_main_worktree(); |
| |
| strbuf_addf(&path, "%s/worktrees", get_git_common_dir()); |
| dir = opendir(path.buf); |
| strbuf_release(&path); |
| if (dir) { |
| while ((d = readdir(dir)) != NULL) { |
| struct worktree *linked = NULL; |
| if (is_dot_or_dotdot(d->d_name)) |
| continue; |
| |
| if ((linked = get_linked_worktree(d->d_name))) { |
| ALLOC_GROW(list, counter + 1, alloc); |
| list[counter++] = linked; |
| } |
| } |
| closedir(dir); |
| } |
| ALLOC_GROW(list, counter + 1, alloc); |
| list[counter] = NULL; |
| |
| if (flags & GWT_SORT_LINKED) |
| /* |
| * don't sort the first item (main worktree), which will |
| * always be the first |
| */ |
| QSORT(list + 1, counter - 1, compare_worktree); |
| |
| mark_current_worktree(list); |
| return list; |
| } |
| |
| const char *get_worktree_git_dir(const struct worktree *wt) |
| { |
| if (!wt) |
| return get_git_dir(); |
| else if (!wt->id) |
| return get_git_common_dir(); |
| else |
| return git_common_path("worktrees/%s", wt->id); |
| } |
| |
| static struct worktree *find_worktree_by_suffix(struct worktree **list, |
| const char *suffix) |
| { |
| struct worktree *found = NULL; |
| int nr_found = 0, suffixlen; |
| |
| suffixlen = strlen(suffix); |
| if (!suffixlen) |
| return NULL; |
| |
| for (; *list && nr_found < 2; list++) { |
| const char *path = (*list)->path; |
| int pathlen = strlen(path); |
| int start = pathlen - suffixlen; |
| |
| /* suffix must start at directory boundary */ |
| if ((!start || (start > 0 && is_dir_sep(path[start - 1]))) && |
| !fspathcmp(suffix, path + start)) { |
| found = *list; |
| nr_found++; |
| } |
| } |
| return nr_found == 1 ? found : NULL; |
| } |
| |
| struct worktree *find_worktree(struct worktree **list, |
| const char *prefix, |
| const char *arg) |
| { |
| struct worktree *wt; |
| char *path; |
| char *to_free = NULL; |
| |
| if ((wt = find_worktree_by_suffix(list, arg))) |
| return wt; |
| |
| if (prefix) |
| arg = to_free = prefix_filename(prefix, arg); |
| path = real_pathdup(arg, 1); |
| for (; *list; list++) |
| if (!fspathcmp(path, real_path((*list)->path))) |
| break; |
| free(path); |
| free(to_free); |
| return *list; |
| } |
| |
| int is_main_worktree(const struct worktree *wt) |
| { |
| return !wt->id; |
| } |
| |
| const char *is_worktree_locked(struct worktree *wt) |
| { |
| assert(!is_main_worktree(wt)); |
| |
| if (!wt->lock_reason_valid) { |
| struct strbuf path = STRBUF_INIT; |
| |
| strbuf_addstr(&path, worktree_git_path(wt, "locked")); |
| if (file_exists(path.buf)) { |
| struct strbuf lock_reason = STRBUF_INIT; |
| if (strbuf_read_file(&lock_reason, path.buf, 0) < 0) |
| die_errno(_("failed to read '%s'"), path.buf); |
| strbuf_trim(&lock_reason); |
| wt->lock_reason = strbuf_detach(&lock_reason, NULL); |
| } else |
| wt->lock_reason = NULL; |
| wt->lock_reason_valid = 1; |
| strbuf_release(&path); |
| } |
| |
| return wt->lock_reason; |
| } |
| |
| /* convenient wrapper to deal with NULL strbuf */ |
| static void strbuf_addf_gently(struct strbuf *buf, const char *fmt, ...) |
| { |
| va_list params; |
| |
| if (!buf) |
| return; |
| |
| va_start(params, fmt); |
| strbuf_vaddf(buf, fmt, params); |
| va_end(params); |
| } |
| |
| int validate_worktree(const struct worktree *wt, struct strbuf *errmsg, |
| unsigned flags) |
| { |
| struct strbuf wt_path = STRBUF_INIT; |
| char *path = NULL; |
| int err, ret = -1; |
| |
| strbuf_addf(&wt_path, "%s/.git", wt->path); |
| |
| if (is_main_worktree(wt)) { |
| if (is_directory(wt_path.buf)) { |
| ret = 0; |
| goto done; |
| } |
| /* |
| * Main worktree using .git file to point to the |
| * repository would make it impossible to know where |
| * the actual worktree is if this function is executed |
| * from another worktree. No .git file support for now. |
| */ |
| strbuf_addf_gently(errmsg, |
| _("'%s' at main working tree is not the repository directory"), |
| wt_path.buf); |
| goto done; |
| } |
| |
| /* |
| * Make sure "gitdir" file points to a real .git file and that |
| * file points back here. |
| */ |
| if (!is_absolute_path(wt->path)) { |
| strbuf_addf_gently(errmsg, |
| _("'%s' file does not contain absolute path to the working tree location"), |
| git_common_path("worktrees/%s/gitdir", wt->id)); |
| goto done; |
| } |
| |
| if (flags & WT_VALIDATE_WORKTREE_MISSING_OK && |
| !file_exists(wt->path)) { |
| ret = 0; |
| goto done; |
| } |
| |
| if (!file_exists(wt_path.buf)) { |
| strbuf_addf_gently(errmsg, _("'%s' does not exist"), wt_path.buf); |
| goto done; |
| } |
| |
| path = xstrdup_or_null(read_gitfile_gently(wt_path.buf, &err)); |
| if (!path) { |
| strbuf_addf_gently(errmsg, _("'%s' is not a .git file, error code %d"), |
| wt_path.buf, err); |
| goto done; |
| } |
| |
| ret = fspathcmp(path, real_path(git_common_path("worktrees/%s", wt->id))); |
| |
| if (ret) |
| strbuf_addf_gently(errmsg, _("'%s' does not point back to '%s'"), |
| wt->path, git_common_path("worktrees/%s", wt->id)); |
| done: |
| free(path); |
| strbuf_release(&wt_path); |
| return ret; |
| } |
| |
| void update_worktree_location(struct worktree *wt, const char *path_) |
| { |
| struct strbuf path = STRBUF_INIT; |
| |
| if (is_main_worktree(wt)) |
| die("BUG: can't relocate main worktree"); |
| |
| strbuf_realpath(&path, path_, 1); |
| if (fspathcmp(wt->path, path.buf)) { |
| write_file(git_common_path("worktrees/%s/gitdir", wt->id), |
| "%s/.git", path.buf); |
| free(wt->path); |
| wt->path = strbuf_detach(&path, NULL); |
| } |
| strbuf_release(&path); |
| } |
| |
| int is_worktree_being_rebased(const struct worktree *wt, |
| const char *target) |
| { |
| struct wt_status_state state; |
| int found_rebase; |
| |
| memset(&state, 0, sizeof(state)); |
| found_rebase = wt_status_check_rebase(wt, &state) && |
| ((state.rebase_in_progress || |
| state.rebase_interactive_in_progress) && |
| state.branch && |
| starts_with(target, "refs/heads/") && |
| !strcmp(state.branch, target + strlen("refs/heads/"))); |
| free(state.branch); |
| free(state.onto); |
| return found_rebase; |
| } |
| |
| int is_worktree_being_bisected(const struct worktree *wt, |
| const char *target) |
| { |
| struct wt_status_state state; |
| int found_rebase; |
| |
| memset(&state, 0, sizeof(state)); |
| found_rebase = wt_status_check_bisect(wt, &state) && |
| state.branch && |
| starts_with(target, "refs/heads/") && |
| !strcmp(state.branch, target + strlen("refs/heads/")); |
| free(state.branch); |
| return found_rebase; |
| } |
| |
| /* |
| * note: this function should be able to detect shared symref even if |
| * HEAD is temporarily detached (e.g. in the middle of rebase or |
| * bisect). New commands that do similar things should update this |
| * function as well. |
| */ |
| const struct worktree *find_shared_symref(const char *symref, |
| const char *target) |
| { |
| const struct worktree *existing = NULL; |
| static struct worktree **worktrees; |
| int i = 0; |
| |
| if (worktrees) |
| free_worktrees(worktrees); |
| worktrees = get_worktrees(0); |
| |
| for (i = 0; worktrees[i]; i++) { |
| struct worktree *wt = worktrees[i]; |
| const char *symref_target; |
| struct ref_store *refs; |
| int flags; |
| |
| if (wt->is_bare) |
| continue; |
| |
| if (wt->is_detached && !strcmp(symref, "HEAD")) { |
| if (is_worktree_being_rebased(wt, target)) { |
| existing = wt; |
| break; |
| } |
| if (is_worktree_being_bisected(wt, target)) { |
| existing = wt; |
| break; |
| } |
| } |
| |
| refs = get_worktree_ref_store(wt); |
| symref_target = refs_resolve_ref_unsafe(refs, symref, 0, |
| NULL, &flags); |
| if ((flags & REF_ISSYMREF) && |
| symref_target && !strcmp(symref_target, target)) { |
| existing = wt; |
| break; |
| } |
| } |
| |
| return existing; |
| } |
| |
| int submodule_uses_worktrees(const char *path) |
| { |
| char *submodule_gitdir; |
| struct strbuf sb = STRBUF_INIT; |
| DIR *dir; |
| struct dirent *d; |
| int ret = 0; |
| struct repository_format format; |
| |
| submodule_gitdir = git_pathdup_submodule(path, "%s", ""); |
| if (!submodule_gitdir) |
| return 0; |
| |
| /* The env would be set for the superproject. */ |
| get_common_dir_noenv(&sb, submodule_gitdir); |
| free(submodule_gitdir); |
| |
| /* |
| * The check below is only known to be good for repository format |
| * version 0 at the time of writing this code. |
| */ |
| strbuf_addstr(&sb, "/config"); |
| read_repository_format(&format, sb.buf); |
| if (format.version != 0) { |
| strbuf_release(&sb); |
| return 1; |
| } |
| |
| /* Replace config by worktrees. */ |
| strbuf_setlen(&sb, sb.len - strlen("config")); |
| strbuf_addstr(&sb, "worktrees"); |
| |
| /* See if there is any file inside the worktrees directory. */ |
| dir = opendir(sb.buf); |
| strbuf_release(&sb); |
| |
| if (!dir) |
| return 0; |
| |
| while ((d = readdir(dir)) != NULL) { |
| if (is_dot_or_dotdot(d->d_name)) |
| continue; |
| |
| ret = 1; |
| break; |
| } |
| closedir(dir); |
| return ret; |
| } |
| |
| int other_head_refs(each_ref_fn fn, void *cb_data) |
| { |
| struct worktree **worktrees, **p; |
| int ret = 0; |
| |
| worktrees = get_worktrees(0); |
| for (p = worktrees; *p; p++) { |
| struct worktree *wt = *p; |
| struct ref_store *refs; |
| |
| if (wt->is_current) |
| continue; |
| |
| refs = get_worktree_ref_store(wt); |
| ret = refs_head_ref(refs, fn, cb_data); |
| if (ret) |
| break; |
| } |
| free_worktrees(worktrees); |
| return ret; |
| } |