Add worktree init CLI for isolated development instances

cli/src/__tests__/worktree.test.ts

@@ -0,0 +1,110 @@
+import path from "node:path";
+import { describe, expect, it } from "vitest";
+import {
+  buildWorktreeConfig,
+  buildWorktreeEnvEntries,
+  formatShellExports,
+  resolveWorktreeLocalPaths,
+  rewriteLocalUrlPort,
+  sanitizeWorktreeInstanceId,
+} from "../commands/worktree-lib.js";
+import type { PaperclipConfig } from "../config/schema.js";
+
+function buildSourceConfig(): PaperclipConfig {
+  return {
+    $meta: {
+      version: 1,
+      updatedAt: "2026-03-09T00:00:00.000Z",
+      source: "configure",
+    },
+    database: {
+      mode: "embedded-postgres",
+      embeddedPostgresDataDir: "/tmp/main/db",
+      embeddedPostgresPort: 54329,
+      backup: {
+        enabled: true,
+        intervalMinutes: 60,
+        retentionDays: 30,
+        dir: "/tmp/main/backups",
+      },
+    },
+    logging: {
+      mode: "file",
+      logDir: "/tmp/main/logs",
+    },
+    server: {
+      deploymentMode: "authenticated",
+      exposure: "private",
+      host: "127.0.0.1",
+      port: 3100,
+      allowedHostnames: ["localhost"],
+      serveUi: true,
+    },
+    auth: {
+      baseUrlMode: "explicit",
+      publicBaseUrl: "http://127.0.0.1:3100",
+      disableSignUp: false,
+    },
+    storage: {
+      provider: "local_disk",
+      localDisk: {
+        baseDir: "/tmp/main/storage",
+      },
+      s3: {
+        bucket: "paperclip",
+        region: "us-east-1",
+        prefix: "",
+        forcePathStyle: false,
+      },
+    },
+    secrets: {
+      provider: "local_encrypted",
+      strictMode: false,
+      localEncrypted: {
+        keyFilePath: "/tmp/main/secrets/master.key",
+      },
+    },
+  };
+}
+
+describe("worktree helpers", () => {
+  it("sanitizes instance ids", () => {
+    expect(sanitizeWorktreeInstanceId("feature/worktree-support")).toBe("feature-worktree-support");
+    expect(sanitizeWorktreeInstanceId("  ")).toBe("worktree");
+  });
+
+  it("rewrites loopback auth URLs to the new port only", () => {
+    expect(rewriteLocalUrlPort("http://127.0.0.1:3100", 3110)).toBe("http://127.0.0.1:3110/");
+    expect(rewriteLocalUrlPort("https://paperclip.example", 3110)).toBe("https://paperclip.example");
+  });
+
+  it("builds isolated config and env paths for a worktree", () => {
+    const paths = resolveWorktreeLocalPaths({
+      cwd: "/tmp/paperclip-feature",
+      homeDir: "/tmp/paperclip-worktrees",
+      instanceId: "feature-worktree-support",
+    });
+    const config = buildWorktreeConfig({
+      sourceConfig: buildSourceConfig(),
+      paths,
+      serverPort: 3110,
+      databasePort: 54339,
+      now: new Date("2026-03-09T12:00:00.000Z"),
+    });
+
+    expect(config.database.embeddedPostgresDataDir).toBe(
+      path.resolve("/tmp/paperclip-worktrees", "instances", "feature-worktree-support", "db"),
+    );
+    expect(config.database.embeddedPostgresPort).toBe(54339);
+    expect(config.server.port).toBe(3110);
+    expect(config.auth.publicBaseUrl).toBe("http://127.0.0.1:3110/");
+    expect(config.storage.localDisk.baseDir).toBe(
+      path.resolve("/tmp/paperclip-worktrees", "instances", "feature-worktree-support", "data", "storage"),
+    );
+
+    const env = buildWorktreeEnvEntries(paths);
+    expect(env.PAPERCLIP_HOME).toBe(path.resolve("/tmp/paperclip-worktrees"));
+    expect(env.PAPERCLIP_INSTANCE_ID).toBe("feature-worktree-support");
+    expect(formatShellExports(env)).toContain("export PAPERCLIP_INSTANCE_ID='feature-worktree-support'");
+  });
+});