Function git_tracks_anything_here

src/watcher/watcher.c:478–494

Does the ancestor repository actually track anything inside this directory? * Emptiness distinguishes "a scratch folder that merely sits under a repo" from * "a genuine subdirectory of one". Output is capped: we only care whether the * first byte exists, never what it is. */

 * "a genuine subdirectory of one". Output is capped: we only care whether the
 * first byte exists, never what it is. */
static watcher_git_status_t git_tracks_anything_here(cbm_watcher_t *w, project_state_t *state,
                                                     bool *tracked_out) {
    *tracked_out = false;
    const char *argv[] = {"git", "-C", state->root_path, "ls-files", "-z", "--", ".", NULL};
    watcher_git_output_t output;
    watcher_git_status_t status = watcher_git_run(w, state, argv, WATCHER_GIT_HEAD_MAX, &output);
    if (status != WATCHER_GIT_OK) {
        return status;
    }
    FILE *fp = cbm_fopen(output.path, "rb");
    if (fp) {
        *tracked_out = fgetc(fp) != EOF;
        (void)fclose(fp);
    }
    watcher_git_output_cleanup(&output);
    return fp ? WATCHER_GIT_OK : WATCHER_GIT_SUPERVISION_FAILED;
}

/* Relative hop from root_path up to the repository root, as `git rev-parse
 * --show-cdup` reports it ("" at the root, "../" one level down, and so on).