563 lines
22 KiB
TypeScript
563 lines
22 KiB
TypeScript
import { execFile, spawn, type ChildProcessWithoutNullStreams } from "node:child_process";
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import { lstatSync, mkdirSync } from "node:fs";
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import { mkdir, rm, writeFile } from "node:fs/promises";
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import { basename, dirname, isAbsolute, join } from "node:path";
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import { promisify, TextDecoder } from "node:util";
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import type { WorkspaceErrorCode, WorkspaceRegistryConfig } from "./types.js";
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const execFileAsync = promisify(execFile);
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export interface GitStatus {
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branch: string;
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head?: string;
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ahead: number;
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behind: number;
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degraded: boolean;
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lastError?: WorkspaceErrorCode;
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}
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export class WorkspaceRegistryError extends Error {
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constructor(readonly code: WorkspaceErrorCode, message: string) {
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super(message);
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this.name = "WorkspaceRegistryError";
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}
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}
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function isMissing(path: string): boolean {
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try {
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lstatSync(path);
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return false;
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} catch {
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return true;
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}
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}
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function assertDirectory(path: string): void {
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const entry = lstatSync(path);
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if (!entry.isDirectory() || entry.isSymbolicLink()) {
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throw new WorkspaceRegistryError("git_unavailable", "Workspace registry path is unavailable");
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}
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}
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function isValidUtf8(buffer: Buffer): boolean {
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try {
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new TextDecoder("utf-8", { fatal: true }).decode(buffer);
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return true;
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} catch {
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return false;
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}
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}
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function gitErrorCode(error: unknown): WorkspaceErrorCode {
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const detail = [
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error instanceof Error ? error.message : "",
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typeof error === "object" && error !== null && "stderr" in error
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? String((error as { stderr?: unknown }).stderr ?? "")
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: "",
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].join("\n").toLowerCase();
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if (/authentication failed|could not read username|permission denied|publickey/.test(detail)) {
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return "git_auth_failed";
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}
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if (/non-fast-forward|not possible to fast-forward|fast-forward/.test(detail)) {
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return "git_non_fast_forward";
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}
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if (/remote rejected|pre-receive hook declined|push.*rejected/.test(detail)) {
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return "git_push_rejected";
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}
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return "git_unavailable";
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}
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/**
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* A persistent checkout that executes Git only through fixed argument vectors. Git's stdout and
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* stderr are intentionally never exposed: they can contain remote URLs or credential hints.
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*/
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export class GitWorkspaceRepository {
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readonly root: string;
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readonly repoPath: string;
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readonly snapshotsPath: string;
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readonly statePath: string;
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readonly locksPath: string;
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private readonly hooksPath: string;
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constructor(private readonly config: WorkspaceRegistryConfig) {
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if (!isAbsolute(config.root)) {
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throw new WorkspaceRegistryError("git_unavailable", "Workspace registry root is unavailable");
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}
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this.root = config.root;
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this.repoPath = join(this.root, "repo");
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this.snapshotsPath = join(this.root, "snapshots");
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this.statePath = join(this.root, "state");
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this.locksPath = join(this.root, "locks");
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this.hooksPath = join(this.locksPath, "empty-hooks");
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}
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async ensureLayout(): Promise<void> {
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try {
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for (const path of [this.root, this.snapshotsPath, this.statePath, this.locksPath, this.hooksPath]) {
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await mkdir(path, { recursive: true, mode: 0o700 });
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assertDirectory(path);
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}
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} catch (error) {
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if (error instanceof WorkspaceRegistryError) throw error;
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throw new WorkspaceRegistryError("git_unavailable", "Workspace registry storage is unavailable");
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}
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}
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async bootstrap(): Promise<GitStatus> {
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await this.ensureLayout();
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if (isMissing(this.repoPath)) {
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if (!this.config.remoteUrl) {
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throw new WorkspaceRegistryError("git_unavailable", "Workspace registry remote is unavailable");
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}
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await this.clone();
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} else {
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assertDirectory(this.repoPath);
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await this.refresh();
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}
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return await this.status();
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}
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async pull(): Promise<GitStatus> {
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await this.ensureLayout();
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if (isMissing(this.repoPath)) return await this.bootstrap();
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assertDirectory(this.repoPath);
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await this.refresh();
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return await this.status();
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}
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async status(): Promise<GitStatus> {
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const head = (await this.git(["rev-parse", "HEAD"])).trim();
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const tracking = await this.gitOptional(["rev-list", "--left-right", "--count", "HEAD...@{upstream}"]);
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const [ahead = "0", behind = "0"] = tracking ? tracking.trim().split(/\s+/) : [];
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return {
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branch: this.config.branch,
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head,
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ahead: Number(ahead),
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behind: Number(behind),
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degraded: false,
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};
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}
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async workspaceDirectories(): Promise<string[]> {
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const output = await this.git(["ls-tree", "-d", "--name-only", "HEAD"]);
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const directories = output.trim() === "" ? [] : output.trim().split("\n");
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for (const id of directories) {
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if (id === "workspace-docs") continue;
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if (!/^[a-z][a-z0-9-]{2,62}$/.test(id)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace repository contains an invalid path");
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}
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}
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return directories.filter((id) => id !== "workspace-docs").sort();
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}
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async workspacePaths(): Promise<string[]> {
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const paths: string[] = [];
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for (const id of await this.workspaceDirectories()) {
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const path = `${id}/workspace.yaml`;
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const type = await this.gitOptional(["cat-file", "-t", `HEAD:${path}`]);
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if (type === undefined) continue;
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if (type.trim() !== "blob") {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace descriptor is invalid");
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}
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paths.push(path);
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}
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return paths.sort();
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}
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async readCatalog(revision = "HEAD"): Promise<string> {
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return await this.git(["show", `${revision}:thoth-workspaces.yaml`], {}, "Workspace catalog is invalid");
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}
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async catalogBlob(revision = "HEAD"): Promise<string> {
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return (await this.git(["rev-parse", `${revision}:thoth-workspaces.yaml`], {},
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"Workspace catalog is invalid")).trim();
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}
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async readWorkspace(path: string, revision = "HEAD"): Promise<string> {
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if (!/^(?!workspace-docs\/)[a-z][a-z0-9-]{2,62}\/workspace\.yaml$/.test(path)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace repository path is invalid");
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}
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return await this.git(["show", `${revision}:${path}`]);
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}
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async blob(path: string, revision = "HEAD"): Promise<string> {
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if (!/^(?!workspace-docs\/)[a-z][a-z0-9-]{2,62}\/workspace\.yaml$/.test(path)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace repository path is invalid");
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}
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return (await this.git(["rev-parse", `${revision}:${path}`])).trim();
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}
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/** Read-only object type at an exact revision, or undefined when absent. */
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async gitObjectType(revision: string, path: string): Promise<string | undefined> {
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if (!/^[0-9a-f]{40}$/.test(revision)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace revision is invalid");
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}
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if (!/^[a-z][a-z0-9-]{2,62}\/workspace\.yaml$/.test(path)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace repository path is invalid");
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}
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return await this.gitOptional(["cat-file", "-t", `${revision}:${path}`]);
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}
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/** Read a generated-doc blob at an exact revision, or undefined when absent. */
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async readObjectOrAbsent(revision: string, path: string): Promise<string | undefined> {
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if (!/^[0-9a-f]{40}$/.test(revision)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace revision is invalid");
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}
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if (!/^workspace-docs\/[a-z][a-z0-9-]{2,62}\/(?:contract\.env\.example|README\.md)$/.test(path)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace repository path is invalid");
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}
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const output = await this.gitOptional(["show", `${revision}:${path}`]);
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return output === undefined ? undefined : output;
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}
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/** List committed generated-doc paths at an exact revision. */
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async workspaceDocsPaths(revision: string): Promise<string[]> {
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if (!/^[0-9a-f]{40}$/.test(revision)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace revision is invalid");
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}
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const output = await this.git(["ls-tree", "-r", "--name-only", revision, "--", "workspace-docs"]);
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if (output.trim() === "") return [];
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const paths = output.trim().split("\n");
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for (const path of paths) {
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if (!/^workspace-docs\/[a-z][a-z0-9-]{2,62}\/(?:contract\.env\.example|README\.md)$/.test(path)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace repository contains an invalid docs path");
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}
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}
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return paths;
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}
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/** Assert that a canonical Evidence root is a Git tree at an exact commit. */
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async assertTreeAtRevision(revision: string, repoRelativePath: string): Promise<void> {
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if (!/^[0-9a-f]{40}$/.test(revision)
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|| !/^[a-z][a-z0-9-]{2,62}\/evidence$/.test(repoRelativePath)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace Evidence revision is invalid");
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}
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const type = (await this.git(
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["cat-file", "-t", `${revision}:${repoRelativePath}`],
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{},
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"Workspace Evidence root is invalid",
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)).trim();
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if (type !== "tree") {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace Evidence root is invalid");
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}
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}
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/** Read the curated FK annotations object at an exact commit, or undefined when absent. */
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async annotationsObject(revision: string, id: string): Promise<{ blobId: string; contents: Buffer } | undefined> {
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if (!/^[0-9a-f]{40}$/.test(revision)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace annotations revision is invalid");
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}
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if (!/^[a-z][a-z0-9-]{2,62}$/.test(id) || id === "workspace-docs") {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace annotations path is invalid");
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}
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const path = `${id}/schema/annotations.yaml`;
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// ls-tree -z reports the exact object at the path (or its children when the path is a tree).
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const listing = await this.git(["ls-tree", "-z", "--full-tree", revision, "--", path]);
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const entries = listing.split("\0").filter((entry) => entry.length > 0);
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if (entries.length === 0) return undefined;
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const exact = entries.find((entry) => entry.slice(entry.lastIndexOf("\t") + 1) === path);
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if (exact === undefined) {
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// The path resolves to a tree (its children are listed) or another non-blob object.
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace annotations object is invalid");
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}
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const match = /^([0-9]{6})\s+(blob|tree|commit)\s+([0-9a-f]{40})\t/.exec(exact);
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// Only regular Git blobs are accepted: symlinks (120000) and gitlinks (160000) are refused.
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if (match === null || match[2] !== "blob" || (match[1] !== "100644" && match[1] !== "100755")) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace annotations object is invalid");
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}
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const blobId = match[3];
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const contents = await this.gitBlobBuffer(blobId, 16 * 1024 * 1024);
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if (!isValidUtf8(contents)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace annotations object is not valid UTF-8");
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}
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return { blobId, contents };
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}
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private async gitBlobBuffer(objectId: string, maxBytes: number): Promise<Buffer> {
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if (!/^[0-9a-f]{40}$/.test(objectId)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace annotations object is invalid");
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}
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try {
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const { stdout } = await execFileAsync(
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"git",
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["-c", `core.hooksPath=${this.hooksPath}`, "cat-file", "blob", objectId],
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{
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cwd: this.repoPath,
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env: { ...process.env, GIT_TERMINAL_PROMPT: "0" },
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encoding: "buffer",
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maxBuffer: maxBytes + 1024 * 1024,
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},
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);
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if (stdout.length > maxBytes) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace annotations object is too large");
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}
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return stdout;
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} catch (error) {
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if (error instanceof WorkspaceRegistryError) throw error;
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const detail = error instanceof Error ? error.message : "";
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if (/maxBuffer|stdout maxBuffer/i.test(detail)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace annotations object is too large");
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}
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throw this.sanitizeGitError(error);
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}
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}
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/** Write only a validated API-owned artifact below the checked-out repository. */
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async writeRegistryFile(path: string, source: string): Promise<void> {
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this.assertRegistryArtifactPath(path);
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const target = join(this.repoPath, path);
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await mkdir(dirname(target), { recursive: true, mode: 0o700 });
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await writeFile(target, source, { encoding: "utf8", mode: 0o600 });
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}
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/** Create a descriptor only when no filesystem entry exists at its exact path. */
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async createRegistryFile(path: string, source: string): Promise<void> {
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this.assertRegistryArtifactPath(path);
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if (!/^(?!workspace-docs\/)[a-z][a-z0-9-]{2,62}\/workspace\.yaml$/.test(path)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace descriptor path is invalid");
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}
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const target = join(this.repoPath, path);
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await mkdir(dirname(target), { recursive: true, mode: 0o700 });
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try {
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await writeFile(target, source, { encoding: "utf8", mode: 0o600, flag: "wx" });
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} catch {
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throw new WorkspaceRegistryError("workspace_curator_owned", "Workspace descriptor is curator-owned");
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}
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}
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async removeRegistryFile(path: string): Promise<void> {
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this.assertRegistryArtifactPath(path);
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await rm(join(this.repoPath, path), { force: true });
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}
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private pendingPublicationPaths: string[] = [];
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/** Commit and push a fixed set of validated artifact paths without exposing Git output. */
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async commitAndPush(paths: readonly string[], message: string): Promise<GitStatus> {
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if (paths.length === 0 || paths.some((path) => !this.isRegistryArtifactPath(path))) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace repository path is invalid");
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}
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this.pendingPublicationPaths = [...paths];
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try {
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await this.git(["add", "--", ...paths]);
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await this.git(["commit", "-m", message], this.publicationIdentity());
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await this.git(["push", "origin", `HEAD:${this.config.branch}`]);
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return await this.status();
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} catch (error) {
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// A failed commit leaves staged/working changes; a failed push leaves an ahead commit.
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// Restore the last fetched remote revision so the next refresh or explicit retry starts clean.
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await this.restoreFailedPublication();
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throw error;
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}
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}
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private async clone(): Promise<void> {
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try {
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await execFileAsync("git", [
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"-c", `core.hooksPath=${this.hooksPath}`,
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"clone", "--branch", this.config.branch, "--single-branch", "--", this.config.remoteUrl!, this.repoPath,
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], { cwd: this.root, env: { ...process.env, GIT_TERMINAL_PROMPT: "0" } });
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assertDirectory(this.repoPath);
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} catch (error) {
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throw this.sanitizeGitError(error);
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}
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}
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private isRegistryArtifactPath(path: string): boolean {
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return /^(?!workspace-docs\/)[a-z][a-z0-9-]{2,62}\/workspace\.yaml$/.test(path)
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|| /^workspace-docs\/[a-z][a-z0-9-]{2,62}\/(?:contract\.env\.example|README\.md)$/.test(path);
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}
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private assertRegistryArtifactPath(path: string): void {
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if (!this.isRegistryArtifactPath(path)) {
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throw new WorkspaceRegistryError("workspace_invalid", "Workspace repository path is invalid");
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}
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}
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private async refresh(): Promise<void> {
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if ((await this.git(["status", "--porcelain"])).trim() !== "") {
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throw new WorkspaceRegistryError("workspace_stale", "Workspace checkout has local changes");
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}
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if (this.config.remoteUrl) {
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await this.git(["remote", "set-url", "origin", "--", this.config.remoteUrl]);
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}
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await this.git(["fetch", "--no-tags", "origin", this.config.branch]);
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const remoteHead = (await this.git(["rev-parse", "FETCH_HEAD"])).trim();
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const localHead = (await this.git(["rev-parse", "HEAD"])).trim();
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if (localHead !== remoteHead) {
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const commonAncestor = (await this.git(["merge-base", "HEAD", "FETCH_HEAD"])).trim();
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if (commonAncestor !== localHead) {
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throw new WorkspaceRegistryError("git_non_fast_forward", "Workspace checkout diverged from remote");
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}
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await this.git(["merge", "--ff-only", "FETCH_HEAD"]);
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}
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if ((await this.git(["rev-parse", "HEAD"])).trim() !== remoteHead) {
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throw new WorkspaceRegistryError("git_non_fast_forward", "Workspace checkout does not match remote");
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}
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}
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private publicationIdentity(): NodeJS.ProcessEnv {
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return {
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GIT_AUTHOR_NAME: this.config.gitAuthorName,
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GIT_AUTHOR_EMAIL: this.config.gitAuthorEmail,
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GIT_COMMITTER_NAME: this.config.gitAuthorName,
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GIT_COMMITTER_EMAIL: this.config.gitAuthorEmail,
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};
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}
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private async restoreFailedPublication(): Promise<void> {
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try {
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await this.git(["reset", "--hard", `refs/remotes/origin/${this.config.branch}`]);
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// Remove only the exact untracked files this publication created, never curated content.
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const untracked = this.pendingPublicationPaths.filter((path) => {
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try {
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lstatSync(join(this.repoPath, path));
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return true;
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} catch {
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return false;
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}
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});
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if (untracked.length > 0) {
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await this.git(["clean", "-fd", "--", ...untracked]);
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}
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this.pendingPublicationPaths = [];
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} catch {
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// Keep the original sanitized publish failure. A future refresh will surface any recovery
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// problem without leaking the Git failure details through the API.
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}
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}
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private async git(
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args: string[],
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env: NodeJS.ProcessEnv = {},
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invalidObjectMessage?: string,
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): Promise<string> {
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try {
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const { stdout } = await execFileAsync(
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"git",
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["-c", `core.hooksPath=${this.hooksPath}`, ...args],
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{ cwd: this.repoPath, env: { ...process.env, GIT_TERMINAL_PROMPT: "0", ...env } },
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);
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return stdout;
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} catch (error) {
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const stderr = typeof error === "object" && error !== null && "stderr" in error
|
|
&& typeof error.stderr === "string" ? error.stderr : "";
|
|
if (invalidObjectMessage
|
|
&& /^fatal: path '[^']+' does not exist in '[0-9a-f]{40}'\s*$/u.test(stderr)) {
|
|
throw new WorkspaceRegistryError("workspace_invalid", invalidObjectMessage);
|
|
}
|
|
throw this.sanitizeGitError(error);
|
|
}
|
|
}
|
|
|
|
private async gitOptional(args: string[]): Promise<string | undefined> {
|
|
try {
|
|
return await this.git(args);
|
|
} catch (error) {
|
|
if (error instanceof WorkspaceRegistryError && error.code === "git_unavailable") return undefined;
|
|
throw error;
|
|
}
|
|
}
|
|
|
|
private sanitizeGitError(error: unknown): WorkspaceRegistryError {
|
|
return new WorkspaceRegistryError(gitErrorCode(error), "Workspace Git operation failed");
|
|
}
|
|
}
|
|
|
|
export class WorkspaceRepositoryLock {
|
|
private queue = Promise.resolve();
|
|
|
|
constructor(private readonly locksPath: string) {}
|
|
|
|
async run<T>(operation: () => Promise<T>): Promise<T> {
|
|
const previous = this.queue;
|
|
let releaseQueue!: () => void;
|
|
this.queue = new Promise<void>((resolve) => { releaseQueue = resolve; });
|
|
await previous;
|
|
|
|
let holder: ChildProcessWithoutNullStreams | undefined;
|
|
const lockPath = join(this.locksPath, "repository.lock");
|
|
try {
|
|
try {
|
|
mkdirSync(this.locksPath, { recursive: true, mode: 0o700 });
|
|
assertDirectory(this.locksPath);
|
|
} catch (error) {
|
|
throw new WorkspaceRegistryError("git_unavailable", "Workspace registry lock is unavailable");
|
|
}
|
|
try {
|
|
holder = await this.acquire(lockPath);
|
|
} catch (error) {
|
|
throw this.lockError(error);
|
|
}
|
|
return await operation();
|
|
} finally {
|
|
try {
|
|
if (holder !== undefined) await this.release(holder);
|
|
} finally {
|
|
releaseQueue();
|
|
}
|
|
}
|
|
}
|
|
|
|
private async acquire(lockPath: string): Promise<ChildProcessWithoutNullStreams> {
|
|
try {
|
|
const entry = lstatSync(lockPath);
|
|
if (!entry.isFile() || entry.isSymbolicLink()) throw new Error("invalid lock path");
|
|
} catch (error) {
|
|
if (!(typeof error === "object" && error !== null && "code" in error && error.code === "ENOENT")) {
|
|
throw error;
|
|
}
|
|
}
|
|
const holder = spawn("python3", ["-c", WorkspaceRepositoryLock.HOLDER_PROGRAM, lockPath], {
|
|
stdio: ["pipe", "pipe", "pipe"],
|
|
});
|
|
await new Promise<void>((resolve, reject) => {
|
|
let output = "";
|
|
const fail = (error: WorkspaceRegistryError) => {
|
|
holder.stdout.removeAllListeners("data");
|
|
reject(error);
|
|
};
|
|
holder.once("error", () => fail(new WorkspaceRegistryError("git_unavailable", "Workspace registry lock is unavailable")));
|
|
holder.once("exit", (code) => {
|
|
fail(new WorkspaceRegistryError(
|
|
code === 73 ? "workspace_stale" : "git_unavailable",
|
|
code === 73 ? "Workspace registry is busy" : "Workspace registry lock is unavailable",
|
|
));
|
|
});
|
|
holder.stdout.on("data", (chunk: Buffer) => {
|
|
output += chunk.toString("utf8");
|
|
if (output === "locked\n") {
|
|
holder.stdout.removeAllListeners("data");
|
|
resolve();
|
|
}
|
|
});
|
|
});
|
|
return holder;
|
|
}
|
|
|
|
private async release(holder: ChildProcessWithoutNullStreams): Promise<void> {
|
|
if (!holder.stdin.destroyed) holder.stdin.end();
|
|
await new Promise<void>((resolve) => holder.once("exit", () => resolve()));
|
|
}
|
|
|
|
private lockError(error: unknown): WorkspaceRegistryError {
|
|
if (error instanceof WorkspaceRegistryError) return error;
|
|
if (typeof error === "object" && error !== null && "code" in error && error.code === "EEXIST") {
|
|
return new WorkspaceRegistryError("workspace_stale", "Workspace registry is busy");
|
|
}
|
|
return new WorkspaceRegistryError("git_unavailable", "Workspace registry lock is unavailable");
|
|
}
|
|
|
|
private static readonly HOLDER_PROGRAM = [
|
|
"import fcntl, os, sys",
|
|
"fd = os.open(sys.argv[1], os.O_RDWR | os.O_CREAT | getattr(os, 'O_NOFOLLOW', 0), 0o600)",
|
|
"try:",
|
|
" fcntl.flock(fd, fcntl.LOCK_EX | fcntl.LOCK_NB)",
|
|
"except BlockingIOError:",
|
|
" sys.exit(73)",
|
|
"sys.stdout.write('locked\\n')",
|
|
"sys.stdout.flush()",
|
|
"sys.stdin.buffer.read()",
|
|
].join("\n");
|
|
}
|