Function cbm_artifact_exists

src/pipeline/artifact.c:787–803

/* ── Existence check ─────────────────────────────────────────────── */

bool cbm_artifact_exists(const char *repo_path) {
    if (!repo_path) {
        return false;
    }

    char zst_path[CBM_SZ_4K];
    artifact_path(zst_path, sizeof(zst_path), repo_path, CBM_ARTIFACT_FILENAME);

    struct stat st;
    if (stat(zst_path, &st) != 0 || st.st_size == 0) {
        return false;
    }

    /* Check schema version is compatible */
    int version = read_metadata_version(repo_path);
    return version >= 0 && version <= CBM_ARTIFACT_SCHEMA_VERSION;
}

/* ── Commit hash extraction ──────────────────────────────────────── */