Function git_head_hash

src/pipeline/artifact.c:228–256

Get current git HEAD hash. buf must be >= CBM_SZ_64. Returns false on error. */

/* Get current git HEAD hash. buf must be >= CBM_SZ_64. Returns false on error. */
static bool git_head_hash(const char *repo_path, char *buf, size_t bufsz) {
    char cmd[CBM_SZ_1K];
    if (!cbm_artifact_repo_path_is_shell_safe(repo_path)) {
        buf[0] = '\0';
        return false;
    }
    int n =
        snprintf(cmd, sizeof(cmd), "git -C \"%s\" rev-parse HEAD 2>" ARTIFACT_NULL_DEV, repo_path);
    if (n < 0 || (size_t)n >= sizeof(cmd)) {
        buf[0] = '\0'; /* truncated command → don't run a malformed shell string (parity with
                          git_context.c) */
        return false;
    }
    FILE *fp = cbm_popen(cmd, "r");
    if (!fp) {
        buf[0] = '\0';
        return false;
    }
    buf[0] = '\0';
    if (fgets(buf, (int)bufsz, fp)) {
        /* Strip trailing newline */
        size_t len = strlen(buf);
        while (len > 0 && (buf[len - ART_NUL] == '\n' || buf[len - ART_NUL] == '\r')) {
            buf[--len] = '\0';
        }
    }
    (void)cbm_pclose(fp);
    return buf[0] != '\0';
}

/* Generate ISO 8601 timestamp into buf. */
static void iso_timestamp(char *buf, size_t bufsz) {