| #include "cache.h" |
| #include "repository.h" |
| #include "refs.h" |
| #include "strbuf.h" |
| #include "worktree.h" |
| #include "dir.h" |
| #include "wt-status.h" |
| #include "config.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]->prune_reason); |
| free(worktrees[i]); |
| } |
| free (worktrees); |
| } |
| |
| /** |
| * Update head_oid, 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 worktree_path = STRBUF_INIT; |
| |
| strbuf_add_real_path(&worktree_path, get_git_common_dir()); |
| strbuf_strip_suffix(&worktree_path, "/.git"); |
| |
| CALLOC_ARRAY(worktree, 1); |
| worktree->path = strbuf_detach(&worktree_path, NULL); |
| /* |
| * NEEDSWORK: If this function is called from a secondary worktree and |
| * config.worktree is present, is_bare_repository_cfg will reflect the |
| * contents of config.worktree, not the contents of the main worktree. |
| * This means that worktree->is_bare may be set to 0 even if the main |
| * worktree is configured to be bare. |
| */ |
| worktree->is_bare = (is_bare_repository_cfg == 1) || |
| is_bare_repository(); |
| add_head_info(worktree); |
| 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); |
| strbuf_strip_suffix(&worktree_path, "/.git"); |
| |
| CALLOC_ARRAY(worktree, 1); |
| 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); |
| } |
| |
| struct worktree **get_worktrees(void) |
| { |
| 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_skip_dot_and_dotdot(dir)) != NULL) { |
| struct worktree *linked = NULL; |
| |
| 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; |
| |
| 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 *to_free = NULL; |
| |
| if ((wt = find_worktree_by_suffix(list, arg))) |
| return wt; |
| |
| if (prefix) |
| arg = to_free = prefix_filename(prefix, arg); |
| wt = find_worktree_by_path(list, arg); |
| free(to_free); |
| return wt; |
| } |
| |
| struct worktree *find_worktree_by_path(struct worktree **list, const char *p) |
| { |
| struct strbuf wt_path = STRBUF_INIT; |
| char *path = real_pathdup(p, 0); |
| |
| if (!path) |
| return NULL; |
| for (; *list; list++) { |
| if (!strbuf_realpath(&wt_path, (*list)->path, 0)) |
| continue; |
| |
| if (!fspathcmp(path, wt_path.buf)) |
| break; |
| } |
| free(path); |
| strbuf_release(&wt_path); |
| return *list; |
| } |
| |
| int is_main_worktree(const struct worktree *wt) |
| { |
| return !wt->id; |
| } |
| |
| const char *worktree_lock_reason(struct worktree *wt) |
| { |
| if (is_main_worktree(wt)) |
| return NULL; |
| |
| 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; |
| } |
| |
| const char *worktree_prune_reason(struct worktree *wt, timestamp_t expire) |
| { |
| struct strbuf reason = STRBUF_INIT; |
| char *path = NULL; |
| |
| if (is_main_worktree(wt)) |
| return NULL; |
| if (wt->prune_reason_valid) |
| return wt->prune_reason; |
| |
| if (should_prune_worktree(wt->id, &reason, &path, expire)) |
| wt->prune_reason = strbuf_detach(&reason, NULL); |
| wt->prune_reason_valid = 1; |
| |
| strbuf_release(&reason); |
| free(path); |
| return wt->prune_reason; |
| } |
| |
| /* convenient wrapper to deal with NULL strbuf */ |
| __attribute__((format (printf, 2, 3))) |
| 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; |
| struct strbuf realpath = 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; |
| } |
| |
| strbuf_realpath(&realpath, git_common_path("worktrees/%s", wt->id), 1); |
| ret = fspathcmp(path, realpath.buf); |
| |
| 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); |
| strbuf_release(&realpath); |
| return ret; |
| } |
| |
| void update_worktree_location(struct worktree *wt, const char *path_) |
| { |
| struct strbuf path = STRBUF_INIT; |
| |
| if (is_main_worktree(wt)) |
| 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 && |
| skip_prefix(target, "refs/heads/", &target) && |
| !strcmp(state.branch, target); |
| wt_status_state_free_buffers(&state); |
| return found_rebase; |
| } |
| |
| int is_worktree_being_bisected(const struct worktree *wt, |
| const char *target) |
| { |
| struct wt_status_state state; |
| int found_bisect; |
| |
| memset(&state, 0, sizeof(state)); |
| found_bisect = wt_status_check_bisect(wt, &state) && |
| state.branch && |
| skip_prefix(target, "refs/heads/", &target) && |
| !strcmp(state.branch, target); |
| wt_status_state_free_buffers(&state); |
| return found_bisect; |
| } |
| |
| /* |
| * 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(struct worktree **worktrees, |
| const char *symref, |
| const char *target) |
| { |
| const struct worktree *existing = NULL; |
| int i = 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, err = STRBUF_INIT; |
| DIR *dir; |
| struct dirent *d; |
| int ret = 0; |
| struct repository_format format = REPOSITORY_FORMAT_INIT; |
| |
| 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); |
| |
| strbuf_addstr(&sb, "/config"); |
| read_repository_format(&format, sb.buf); |
| if (verify_repository_format(&format, &err)) { |
| strbuf_release(&err); |
| strbuf_release(&sb); |
| clear_repository_format(&format); |
| return 1; |
| } |
| clear_repository_format(&format); |
| strbuf_release(&err); |
| |
| /* 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; |
| |
| d = readdir_skip_dot_and_dotdot(dir); |
| if (d != NULL) |
| ret = 1; |
| closedir(dir); |
| return ret; |
| } |
| |
| int parse_worktree_ref(const char *worktree_ref, const char **name, |
| int *name_length, const char **ref) |
| { |
| if (skip_prefix(worktree_ref, "main-worktree/", &worktree_ref)) { |
| if (!*worktree_ref) |
| return -1; |
| if (name) |
| *name = NULL; |
| if (name_length) |
| *name_length = 0; |
| if (ref) |
| *ref = worktree_ref; |
| return 0; |
| } |
| if (skip_prefix(worktree_ref, "worktrees/", &worktree_ref)) { |
| const char *slash = strchr(worktree_ref, '/'); |
| |
| if (!slash || slash == worktree_ref || !slash[1]) |
| return -1; |
| if (name) |
| *name = worktree_ref; |
| if (name_length) |
| *name_length = slash - worktree_ref; |
| if (ref) |
| *ref = slash + 1; |
| return 0; |
| } |
| return -1; |
| } |
| |
| void strbuf_worktree_ref(const struct worktree *wt, |
| struct strbuf *sb, |
| const char *refname) |
| { |
| switch (ref_type(refname)) { |
| case REF_TYPE_PSEUDOREF: |
| case REF_TYPE_PER_WORKTREE: |
| if (wt && !wt->is_current) { |
| if (is_main_worktree(wt)) |
| strbuf_addstr(sb, "main-worktree/"); |
| else |
| strbuf_addf(sb, "worktrees/%s/", wt->id); |
| } |
| break; |
| |
| case REF_TYPE_MAIN_PSEUDOREF: |
| case REF_TYPE_OTHER_PSEUDOREF: |
| break; |
| |
| case REF_TYPE_NORMAL: |
| /* |
| * For shared refs, don't prefix worktrees/ or |
| * main-worktree/. It's not necessary and |
| * files-backend.c can't handle it anyway. |
| */ |
| break; |
| } |
| strbuf_addstr(sb, refname); |
| } |
| |
| int other_head_refs(each_ref_fn fn, void *cb_data) |
| { |
| struct worktree **worktrees, **p; |
| struct strbuf refname = STRBUF_INIT; |
| int ret = 0; |
| |
| worktrees = get_worktrees(); |
| for (p = worktrees; *p; p++) { |
| struct worktree *wt = *p; |
| struct object_id oid; |
| int flag; |
| |
| if (wt->is_current) |
| continue; |
| |
| strbuf_reset(&refname); |
| strbuf_worktree_ref(wt, &refname, "HEAD"); |
| if (refs_resolve_ref_unsafe(get_main_ref_store(the_repository), |
| refname.buf, |
| RESOLVE_REF_READING, |
| &oid, &flag)) |
| ret = fn(refname.buf, &oid, flag, cb_data); |
| if (ret) |
| break; |
| } |
| free_worktrees(worktrees); |
| strbuf_release(&refname); |
| return ret; |
| } |
| |
| /* |
| * Repair worktree's /path/to/worktree/.git file if missing, corrupt, or not |
| * pointing at <repo>/worktrees/<id>. |
| */ |
| static void repair_gitfile(struct worktree *wt, |
| worktree_repair_fn fn, void *cb_data) |
| { |
| struct strbuf dotgit = STRBUF_INIT; |
| struct strbuf repo = STRBUF_INIT; |
| char *backlink; |
| const char *repair = NULL; |
| int err; |
| |
| /* missing worktree can't be repaired */ |
| if (!file_exists(wt->path)) |
| return; |
| |
| if (!is_directory(wt->path)) { |
| fn(1, wt->path, _("not a directory"), cb_data); |
| return; |
| } |
| |
| strbuf_realpath(&repo, git_common_path("worktrees/%s", wt->id), 1); |
| strbuf_addf(&dotgit, "%s/.git", wt->path); |
| backlink = xstrdup_or_null(read_gitfile_gently(dotgit.buf, &err)); |
| |
| if (err == READ_GITFILE_ERR_NOT_A_FILE) |
| fn(1, wt->path, _(".git is not a file"), cb_data); |
| else if (err) |
| repair = _(".git file broken"); |
| else if (fspathcmp(backlink, repo.buf)) |
| repair = _(".git file incorrect"); |
| |
| if (repair) { |
| fn(0, wt->path, repair, cb_data); |
| write_file(dotgit.buf, "gitdir: %s", repo.buf); |
| } |
| |
| free(backlink); |
| strbuf_release(&repo); |
| strbuf_release(&dotgit); |
| } |
| |
| static void repair_noop(int iserr, const char *path, const char *msg, |
| void *cb_data) |
| { |
| /* nothing */ |
| } |
| |
| void repair_worktrees(worktree_repair_fn fn, void *cb_data) |
| { |
| struct worktree **worktrees = get_worktrees(); |
| struct worktree **wt = worktrees + 1; /* +1 skips main worktree */ |
| |
| if (!fn) |
| fn = repair_noop; |
| for (; *wt; wt++) |
| repair_gitfile(*wt, fn, cb_data); |
| free_worktrees(worktrees); |
| } |
| |
| static int is_main_worktree_path(const char *path) |
| { |
| struct strbuf target = STRBUF_INIT; |
| struct strbuf maindir = STRBUF_INIT; |
| int cmp; |
| |
| strbuf_add_real_path(&target, path); |
| strbuf_strip_suffix(&target, "/.git"); |
| strbuf_add_real_path(&maindir, get_git_common_dir()); |
| strbuf_strip_suffix(&maindir, "/.git"); |
| cmp = fspathcmp(maindir.buf, target.buf); |
| |
| strbuf_release(&maindir); |
| strbuf_release(&target); |
| return !cmp; |
| } |
| |
| /* |
| * If both the main worktree and linked worktree have been moved, then the |
| * gitfile /path/to/worktree/.git won't point into the repository, thus we |
| * won't know which <repo>/worktrees/<id>/gitdir to repair. However, we may |
| * be able to infer the gitdir by manually reading /path/to/worktree/.git, |
| * extracting the <id>, and checking if <repo>/worktrees/<id> exists. |
| */ |
| static char *infer_backlink(const char *gitfile) |
| { |
| struct strbuf actual = STRBUF_INIT; |
| struct strbuf inferred = STRBUF_INIT; |
| const char *id; |
| |
| if (strbuf_read_file(&actual, gitfile, 0) < 0) |
| goto error; |
| if (!starts_with(actual.buf, "gitdir:")) |
| goto error; |
| if (!(id = find_last_dir_sep(actual.buf))) |
| goto error; |
| strbuf_trim(&actual); |
| id++; /* advance past '/' to point at <id> */ |
| if (!*id) |
| goto error; |
| strbuf_git_common_path(&inferred, the_repository, "worktrees/%s", id); |
| if (!is_directory(inferred.buf)) |
| goto error; |
| |
| strbuf_release(&actual); |
| return strbuf_detach(&inferred, NULL); |
| |
| error: |
| strbuf_release(&actual); |
| strbuf_release(&inferred); |
| return NULL; |
| } |
| |
| /* |
| * Repair <repo>/worktrees/<id>/gitdir if missing, corrupt, or not pointing at |
| * the worktree's path. |
| */ |
| void repair_worktree_at_path(const char *path, |
| worktree_repair_fn fn, void *cb_data) |
| { |
| struct strbuf dotgit = STRBUF_INIT; |
| struct strbuf realdotgit = STRBUF_INIT; |
| struct strbuf gitdir = STRBUF_INIT; |
| struct strbuf olddotgit = STRBUF_INIT; |
| char *backlink = NULL; |
| const char *repair = NULL; |
| int err; |
| |
| if (!fn) |
| fn = repair_noop; |
| |
| if (is_main_worktree_path(path)) |
| goto done; |
| |
| strbuf_addf(&dotgit, "%s/.git", path); |
| if (!strbuf_realpath(&realdotgit, dotgit.buf, 0)) { |
| fn(1, path, _("not a valid path"), cb_data); |
| goto done; |
| } |
| |
| backlink = xstrdup_or_null(read_gitfile_gently(realdotgit.buf, &err)); |
| if (err == READ_GITFILE_ERR_NOT_A_FILE) { |
| fn(1, realdotgit.buf, _("unable to locate repository; .git is not a file"), cb_data); |
| goto done; |
| } else if (err == READ_GITFILE_ERR_NOT_A_REPO) { |
| if (!(backlink = infer_backlink(realdotgit.buf))) { |
| fn(1, realdotgit.buf, _("unable to locate repository; .git file does not reference a repository"), cb_data); |
| goto done; |
| } |
| } else if (err) { |
| fn(1, realdotgit.buf, _("unable to locate repository; .git file broken"), cb_data); |
| goto done; |
| } |
| |
| strbuf_addf(&gitdir, "%s/gitdir", backlink); |
| if (strbuf_read_file(&olddotgit, gitdir.buf, 0) < 0) |
| repair = _("gitdir unreadable"); |
| else { |
| strbuf_rtrim(&olddotgit); |
| if (fspathcmp(olddotgit.buf, realdotgit.buf)) |
| repair = _("gitdir incorrect"); |
| } |
| |
| if (repair) { |
| fn(0, gitdir.buf, repair, cb_data); |
| write_file(gitdir.buf, "%s", realdotgit.buf); |
| } |
| done: |
| free(backlink); |
| strbuf_release(&olddotgit); |
| strbuf_release(&gitdir); |
| strbuf_release(&realdotgit); |
| strbuf_release(&dotgit); |
| } |
| |
| int should_prune_worktree(const char *id, struct strbuf *reason, char **wtpath, timestamp_t expire) |
| { |
| struct stat st; |
| char *path; |
| int fd; |
| size_t len; |
| ssize_t read_result; |
| |
| *wtpath = NULL; |
| if (!is_directory(git_path("worktrees/%s", id))) { |
| strbuf_addstr(reason, _("not a valid directory")); |
| return 1; |
| } |
| if (file_exists(git_path("worktrees/%s/locked", id))) |
| return 0; |
| if (stat(git_path("worktrees/%s/gitdir", id), &st)) { |
| strbuf_addstr(reason, _("gitdir file does not exist")); |
| return 1; |
| } |
| fd = open(git_path("worktrees/%s/gitdir", id), O_RDONLY); |
| if (fd < 0) { |
| strbuf_addf(reason, _("unable to read gitdir file (%s)"), |
| strerror(errno)); |
| return 1; |
| } |
| len = xsize_t(st.st_size); |
| path = xmallocz(len); |
| |
| read_result = read_in_full(fd, path, len); |
| if (read_result < 0) { |
| strbuf_addf(reason, _("unable to read gitdir file (%s)"), |
| strerror(errno)); |
| close(fd); |
| free(path); |
| return 1; |
| } |
| close(fd); |
| |
| if (read_result != len) { |
| strbuf_addf(reason, |
| _("short read (expected %"PRIuMAX" bytes, read %"PRIuMAX")"), |
| (uintmax_t)len, (uintmax_t)read_result); |
| free(path); |
| return 1; |
| } |
| while (len && (path[len - 1] == '\n' || path[len - 1] == '\r')) |
| len--; |
| if (!len) { |
| strbuf_addstr(reason, _("invalid gitdir file")); |
| free(path); |
| return 1; |
| } |
| path[len] = '\0'; |
| if (!file_exists(path)) { |
| if (stat(git_path("worktrees/%s/index", id), &st) || |
| st.st_mtime <= expire) { |
| strbuf_addstr(reason, _("gitdir file points to non-existent location")); |
| free(path); |
| return 1; |
| } else { |
| *wtpath = path; |
| return 0; |
| } |
| } |
| *wtpath = path; |
| return 0; |
| } |
| |
| static int move_config_setting(const char *key, const char *value, |
| const char *from_file, const char *to_file) |
| { |
| if (git_config_set_in_file_gently(to_file, key, value)) |
| return error(_("unable to set %s in '%s'"), key, to_file); |
| if (git_config_set_in_file_gently(from_file, key, NULL)) |
| return error(_("unable to unset %s in '%s'"), key, from_file); |
| return 0; |
| } |
| |
| int init_worktree_config(struct repository *r) |
| { |
| int res = 0; |
| int bare = 0; |
| struct config_set cs = { { 0 } }; |
| const char *core_worktree; |
| char *common_config_file; |
| char *main_worktree_file; |
| |
| /* |
| * If the extension is already enabled, then we can skip the |
| * upgrade process. |
| */ |
| if (repository_format_worktree_config) |
| return 0; |
| if ((res = git_config_set_gently("extensions.worktreeConfig", "true"))) |
| return error(_("failed to set extensions.worktreeConfig setting")); |
| |
| common_config_file = xstrfmt("%s/config", r->commondir); |
| main_worktree_file = xstrfmt("%s/config.worktree", r->commondir); |
| |
| git_configset_init(&cs); |
| git_configset_add_file(&cs, common_config_file); |
| |
| /* |
| * If core.bare is true in the common config file, then we need to |
| * move it to the main worktree's config file or it will break all |
| * worktrees. If it is false, then leave it in place because it |
| * _could_ be negating a global core.bare=true. |
| */ |
| if (!git_configset_get_bool(&cs, "core.bare", &bare) && bare) { |
| if ((res = move_config_setting("core.bare", "true", |
| common_config_file, |
| main_worktree_file))) |
| goto cleanup; |
| } |
| /* |
| * If core.worktree is set, then the main worktree is located |
| * somewhere different than the parent of the common Git dir. |
| * Relocate that value to avoid breaking all worktrees with this |
| * upgrade to worktree config. |
| */ |
| if (!git_configset_get_value(&cs, "core.worktree", &core_worktree)) { |
| if ((res = move_config_setting("core.worktree", core_worktree, |
| common_config_file, |
| main_worktree_file))) |
| goto cleanup; |
| } |
| |
| /* |
| * Ensure that we use worktree config for the remaining lifetime |
| * of the current process. |
| */ |
| repository_format_worktree_config = 1; |
| |
| cleanup: |
| git_configset_clear(&cs); |
| free(common_config_file); |
| free(main_worktree_file); |
| return res; |
| } |