diff options
| -rw-r--r-- | worktree.c | 72 | ||||
| -rw-r--r-- | worktree.h | 9 |
2 files changed, 81 insertions, 0 deletions
diff --git a/worktree.c b/worktree.c index f5da7d286d..b238d87bf1 100644 --- a/worktree.c +++ b/worktree.c @@ -254,6 +254,78 @@ const char *is_worktree_locked(struct worktree *wt) 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) +{ + 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 (!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; +} + int is_worktree_being_rebased(const struct worktree *wt, const char *target) { diff --git a/worktree.h b/worktree.h index c28a880e18..cb577de8cd 100644 --- a/worktree.h +++ b/worktree.h @@ -3,6 +3,8 @@ #include "refs.h" +struct strbuf; + struct worktree { char *path; char *id; @@ -60,6 +62,13 @@ extern int is_main_worktree(const struct worktree *wt); extern const char *is_worktree_locked(struct worktree *wt); /* + * Return zero if the worktree is in good condition. Error message is + * returned if "errmsg" is not NULL. + */ +extern int validate_worktree(const struct worktree *wt, + struct strbuf *errmsg); + +/* * Free up the memory for worktree(s) */ extern void free_worktrees(struct worktree **); |