feat: mosaic uninstall (IUH-M01) (#429)

packages/mosaic/src/runtime/install-manifest.spec.ts

@@ -0,0 +1,167 @@
+import { describe, it, expect, beforeEach, afterEach } from 'vitest';
+import { mkdtempSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+
+import {
+  createManifest,
+  readManifest,
+  writeManifest,
+  manifestPath,
+  heuristicRuntimeAssetDests,
+  DEFAULT_SCOPE_LINE,
+  MANIFEST_VERSION,
+} from './install-manifest.js';
+
+// ─── helpers ─────────────────────────────────────────────────────────────────
+
+let tmpDir: string;
+
+beforeEach(() => {
+  tmpDir = mkdtempSync(join(tmpdir(), 'mosaic-manifest-test-'));
+});
+
+afterEach(() => {
+  rmSync(tmpDir, { recursive: true, force: true });
+});
+
+// ─── createManifest ───────────────────────────────────────────────────────────
+
+describe('createManifest', () => {
+  it('creates a valid manifest with version 1', () => {
+    const m = createManifest('0.0.24', 2);
+    expect(m.version).toBe(MANIFEST_VERSION);
+    expect(m.cliVersion).toBe('0.0.24');
+    expect(m.frameworkVersion).toBe(2);
+  });
+
+  it('sets installedAt to an ISO-8601 date string', () => {
+    const before = new Date();
+    const m = createManifest('0.0.24', 2);
+    const after = new Date();
+    const ts = new Date(m.installedAt);
+    expect(ts.getTime()).toBeGreaterThanOrEqual(before.getTime());
+    expect(ts.getTime()).toBeLessThanOrEqual(after.getTime());
+  });
+
+  it('starts with empty mutation arrays', () => {
+    const m = createManifest('0.0.24', 2);
+    expect(m.mutations.directories).toHaveLength(0);
+    expect(m.mutations.npmGlobalPackages).toHaveLength(0);
+    expect(m.mutations.npmrcLines).toHaveLength(0);
+    expect(m.mutations.shellProfileEdits).toHaveLength(0);
+    expect(m.mutations.runtimeAssetCopies).toHaveLength(0);
+  });
+
+  it('merges partial mutations', () => {
+    const m = createManifest('0.0.24', 2, {
+      npmGlobalPackages: ['@mosaicstack/mosaic'],
+    });
+    expect(m.mutations.npmGlobalPackages).toEqual(['@mosaicstack/mosaic']);
+    expect(m.mutations.directories).toHaveLength(0);
+  });
+});
+
+// ─── manifestPath ─────────────────────────────────────────────────────────────
+
+describe('manifestPath', () => {
+  it('returns mosaicHome/.install-manifest.json', () => {
+    const p = manifestPath('/home/user/.config/mosaic');
+    expect(p).toBe('/home/user/.config/mosaic/.install-manifest.json');
+  });
+});
+
+// ─── writeManifest / readManifest round-trip ─────────────────────────────────
+
+describe('writeManifest + readManifest', () => {
+  it('round-trips a manifest through disk', () => {
+    const m = createManifest('0.0.24', 2, {
+      npmGlobalPackages: ['@mosaicstack/mosaic'],
+      npmrcLines: [DEFAULT_SCOPE_LINE],
+    });
+
+    writeManifest(tmpDir, m);
+    const loaded = readManifest(tmpDir);
+
+    expect(loaded).toBeDefined();
+    expect(loaded!.version).toBe(1);
+    expect(loaded!.cliVersion).toBe('0.0.24');
+    expect(loaded!.mutations.npmGlobalPackages).toEqual(['@mosaicstack/mosaic']);
+    expect(loaded!.mutations.npmrcLines).toEqual([DEFAULT_SCOPE_LINE]);
+  });
+
+  it('preserves runtimeAssetCopies with backup path', () => {
+    const m = createManifest('0.0.24', 2, {
+      runtimeAssetCopies: [
+        {
+          source: '/src/settings.json',
+          dest: '/home/user/.claude/settings.json',
+          backup: '/home/user/.claude/settings.json.mosaic-bak-20260405120000',
+        },
+      ],
+    });
+
+    writeManifest(tmpDir, m);
+    const loaded = readManifest(tmpDir);
+
+    const copies = loaded!.mutations.runtimeAssetCopies;
+    expect(copies).toHaveLength(1);
+    expect(copies[0]!.backup).toBe('/home/user/.claude/settings.json.mosaic-bak-20260405120000');
+  });
+});
+
+// ─── readManifest — missing / invalid ────────────────────────────────────────
+
+describe('readManifest error cases', () => {
+  it('returns undefined when the file does not exist', () => {
+    expect(readManifest('/nonexistent/path')).toBeUndefined();
+  });
+
+  it('returns undefined when the file contains invalid JSON', () => {
+    const { writeFileSync } = require('node:fs');
+    writeFileSync(join(tmpDir, '.install-manifest.json'), 'not json', 'utf8');
+    expect(readManifest(tmpDir)).toBeUndefined();
+  });
+
+  it('returns undefined when version field is wrong', () => {
+    const { writeFileSync } = require('node:fs');
+    writeFileSync(
+      join(tmpDir, '.install-manifest.json'),
+      JSON.stringify({
+        version: 99,
+        installedAt: new Date().toISOString(),
+        cliVersion: '1',
+        frameworkVersion: 1,
+        mutations: {},
+      }),
+      'utf8',
+    );
+    expect(readManifest(tmpDir)).toBeUndefined();
+  });
+});
+
+// ─── heuristicRuntimeAssetDests ──────────────────────────────────────────────
+
+describe('heuristicRuntimeAssetDests', () => {
+  it('returns a non-empty list of absolute paths', () => {
+    const dests = heuristicRuntimeAssetDests('/home/user');
+    expect(dests.length).toBeGreaterThan(0);
+    for (const d of dests) {
+      expect(d).toMatch(/^\/home\/user\//);
+    }
+  });
+
+  it('includes the claude settings.json path', () => {
+    const dests = heuristicRuntimeAssetDests('/home/user');
+    expect(dests).toContain('/home/user/.claude/settings.json');
+  });
+});
+
+// ─── DEFAULT_SCOPE_LINE ───────────────────────────────────────────────────────
+
+describe('DEFAULT_SCOPE_LINE', () => {
+  it('contains the mosaicstack registry URL', () => {
+    expect(DEFAULT_SCOPE_LINE).toContain('mosaicstack');
+    expect(DEFAULT_SCOPE_LINE).toContain('@mosaicstack:registry=');
+  });
+});

packages/mosaic/src/runtime/install-manifest.ts

@@ -0,0 +1,163 @@
+/**
+ * install-manifest.ts
+ *
+ * Read/write helpers for ~/.config/mosaic/.install-manifest.json
+ *
+ * The manifest is the authoritative record of what the installer mutated on the
+ * host system so that `mosaic uninstall` can precisely reverse every change.
+ * If the manifest is absent the uninstaller falls back to heuristic mode and
+ * warns the user.
+ */
+
+import { readFileSync, writeFileSync, existsSync, chmodSync } from 'node:fs';
+import { join } from 'node:path';
+
+export const MANIFEST_FILENAME = '.install-manifest.json';
+export const MANIFEST_VERSION = 1;
+
+/** A single runtime asset copy recorded during install. */
+export interface RuntimeAssetCopy {
+  /** Absolute path to the source file in MOSAIC_HOME (or the npm package). */
+  source: string;
+  /** Absolute path to the destination on the host. */
+  dest: string;
+  /**
+   * Absolute path to the backup that was created when an existing file was
+   * displaced.  Undefined when no pre-existing file was found.
+   */
+  backup?: string;
+}
+
+/** The full shape of the install manifest (version 1). */
+export interface InstallManifest {
+  version: 1;
+  /** ISO-8601 timestamp of when the install completed. */
+  installedAt: string;
+  /** Version of @mosaicstack/mosaic that was installed. */
+  cliVersion: string;
+  /** Framework schema version (integer) that was installed. */
+  frameworkVersion: number;
+  mutations: {
+    /** Directories that were created by the installer. */
+    directories: string[];
+    /** npm global packages that were installed. */
+    npmGlobalPackages: string[];
+    /**
+     * Exact lines that were appended to ~/.npmrc.
+     * Each entry is the full line text (no trailing newline).
+     */
+    npmrcLines: string[];
+    /**
+     * Shell profile edits — each entry is an object recording which file was
+     * edited and what line was appended.
+     */
+    shellProfileEdits: Array<{ file: string; line: string }>;
+    /** Runtime asset copies performed by mosaic-link-runtime-assets. */
+    runtimeAssetCopies: RuntimeAssetCopy[];
+  };
+}
+
+/** Default empty mutations block. */
+function emptyMutations(): InstallManifest['mutations'] {
+  return {
+    directories: [],
+    npmGlobalPackages: [],
+    npmrcLines: [],
+    shellProfileEdits: [],
+    runtimeAssetCopies: [],
+  };
+}
+
+/**
+ * Build a new manifest with sensible defaults.
+ * Callers fill in the mutation fields before persisting.
+ */
+export function createManifest(
+  cliVersion: string,
+  frameworkVersion: number,
+  partial?: Partial<InstallManifest['mutations']>,
+): InstallManifest {
+  return {
+    version: MANIFEST_VERSION,
+    installedAt: new Date().toISOString(),
+    cliVersion,
+    frameworkVersion,
+    mutations: { ...emptyMutations(), ...partial },
+  };
+}
+
+/**
+ * Return the absolute path to the manifest file.
+ */
+export function manifestPath(mosaicHome: string): string {
+  return join(mosaicHome, MANIFEST_FILENAME);
+}
+
+/**
+ * Read the manifest from disk.
+ * Returns `undefined` if the file does not exist or cannot be parsed.
+ * Never throws — callers decide how to handle heuristic-fallback mode.
+ */
+export function readManifest(mosaicHome: string): InstallManifest | undefined {
+  const p = manifestPath(mosaicHome);
+  if (!existsSync(p)) return undefined;
+  try {
+    const raw = readFileSync(p, 'utf8');
+    const parsed: unknown = JSON.parse(raw);
+    if (!isValidManifest(parsed)) return undefined;
+    return parsed;
+  } catch {
+    return undefined;
+  }
+}
+
+/**
+ * Persist the manifest to disk with mode 0600 (owner read/write only).
+ * Creates the mosaicHome directory if it does not exist.
+ */
+export function writeManifest(mosaicHome: string, manifest: InstallManifest): void {
+  const p = manifestPath(mosaicHome);
+  const json = JSON.stringify(manifest, null, 2) + '\n';
+  writeFileSync(p, json, { encoding: 'utf8' });
+  try {
+    chmodSync(p, 0o600);
+  } catch {
+    // chmod may fail on some systems (e.g. Windows); non-fatal
+  }
+}
+
+/**
+ * Narrow an unknown value to InstallManifest.
+ * Only checks the minimum structure; does not validate every field.
+ */
+function isValidManifest(v: unknown): v is InstallManifest {
+  if (typeof v !== 'object' || v === null) return false;
+  const m = v as Record<string, unknown>;
+  if (m['version'] !== 1) return false;
+  if (typeof m['installedAt'] !== 'string') return false;
+  if (typeof m['cliVersion'] !== 'string') return false;
+  if (typeof m['frameworkVersion'] !== 'number') return false;
+  if (typeof m['mutations'] !== 'object' || m['mutations'] === null) return false;
+  return true;
+}
+
+/**
+ * The known set of runtime asset destinations managed by
+ * mosaic-link-runtime-assets / framework/install.sh.
+ *
+ * Used by heuristic mode when no manifest is available.
+ */
+export function heuristicRuntimeAssetDests(homeDir: string): string[] {
+  return [
+    join(homeDir, '.claude', 'CLAUDE.md'),
+    join(homeDir, '.claude', 'settings.json'),
+    join(homeDir, '.claude', 'hooks-config.json'),
+    join(homeDir, '.claude', 'context7-integration.md'),
+    join(homeDir, '.config', 'opencode', 'AGENTS.md'),
+    join(homeDir, '.codex', 'instructions.md'),
+  ];
+}
+
+/** The npmrc scope line added by tools/install.sh. */
+export const DEFAULT_SCOPE_LINE =
+  '@mosaicstack:registry=https://git.mosaicstack.dev/api/packages/mosaicstack/npm/';