Function git_head

src/watcher/watcher.c:455–483

}

static watcher_git_status_t git_head(cbm_watcher_t *w, project_state_t *state, char *out,
                                     size_t out_size) {
    if (!out || out_size < 2) {
        return WATCHER_GIT_SUPERVISION_FAILED;
    }
    out[0] = '\0';
    const char *argv[] = {"git", "-C", state->root_path, "rev-parse", "HEAD", 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 *file = cbm_fopen(output.path, "rb");
    bool read = file && fgets(out, (int)out_size, file) != NULL;
    int extra = file ? fgetc(file) : EOF;
    if (file) {
        read = fclose(file) == 0 && read;
    }
    watcher_git_output_cleanup(&output);
    if (!read || extra != EOF) {
        out[0] = '\0';
        return WATCHER_GIT_SUPERVISION_FAILED;
    }
    size_t len = strlen(out);
    while (len > 0 && (out[len - SKIP_ONE] == '\n' || out[len - SKIP_ONE] == '\r')) {
        out[--len] = '\0';
    }
    return len > 0 ? WATCHER_GIT_OK : WATCHER_GIT_COMMAND_FAILED;
}

/* ── Dirty-state signature (#937) ───────────────────────────────── */