Fix Windows absolute path detection and .zip example in docstring

Agent-Logs-Url: https://github.com/github/spec-kit/sessions/ddeae546-8287-421f-bc5d-1636515bf99a

Co-authored-by: mnriem <15701806+mnriem@users.noreply.github.com>

src/specify_cli/__init__.py

@@ -961,6 +961,99 @@ SKILL_DESCRIPTIONS = {
 }
 
 
+def _install_extension_during_init(project_path: Path, ext_spec: str, speckit_version: str) -> str:
+    """Install a single extension during ``specify init``.
+
+    Handles bundled extension names, local directory paths, and HTTPS URLs.
+    Returns a short status message on success.
+    Raises ``ValueError`` on failure so the caller can convert it to a
+    tracker error without aborting the entire init.
+    """
+    from urllib.parse import urlparse
+    from .extensions import ExtensionManager, ExtensionCatalog, ExtensionError, ValidationError, CompatibilityError
+
+    manager = ExtensionManager(project_path)
+
+    # --- URL ---
+    parsed = urlparse(ext_spec)
+    if parsed.scheme in ("http", "https"):
+        is_localhost = parsed.hostname in ("localhost", "127.0.0.1", "::1")
+        if parsed.scheme != "https" and not (parsed.scheme == "http" and is_localhost):
+            raise ValueError("URL must use HTTPS (HTTP is only allowed for localhost)")
+
+        import urllib.request
+        import urllib.error as _urllib_error
+        download_dir = project_path / ".specify" / "extensions" / ".cache" / "downloads"
+        download_dir.mkdir(parents=True, exist_ok=True)
+        import re as _re
+        safe_name = _re.sub(r"[^a-z0-9-]", "-", (parsed.path.split("/")[-1] or "download").lower())[:64]
+        zip_path = download_dir / f"{safe_name}-init-download.zip"
+        try:
+            with urllib.request.urlopen(ext_spec, timeout=60) as _resp:
+                zip_path.write_bytes(_resp.read())
+            manifest = manager.install_from_zip(zip_path, speckit_version)
+        except _urllib_error.URLError as exc:
+            raise ValueError(f"Failed to download from {ext_spec}: {exc}") from exc
+        finally:
+            zip_path.unlink(missing_ok=True)
+        return f"{manifest.name} v{manifest.version} installed"
+
+    # --- Local path ---
+    if ext_spec.startswith(("./", "../", "/", "~/", ".\\", "..\\")) or Path(ext_spec).is_absolute():
+        source_path = Path(ext_spec).expanduser().resolve()
+        if not source_path.exists():
+            raise ValueError(f"Directory not found: {source_path}")
+        if not (source_path / "extension.yml").exists():
+            raise ValueError(f"No extension.yml found in {source_path}")
+        manifest = manager.install_from_directory(source_path, speckit_version)
+        return f"{manifest.name} v{manifest.version} installed"
+
+    # --- Bundled extension name or catalog ID ---
+    bundled_path = _locate_bundled_extension(ext_spec)
+    if bundled_path is not None:
+        if manager.registry.is_installed(ext_spec):
+            return "already installed"
+        manifest = manager.install_from_directory(bundled_path, speckit_version)
+        return f"{manifest.name} v{manifest.version} installed"
+
+    # Fall back to catalog
+    catalog = ExtensionCatalog(project_path)
+    ext_info, catalog_error = _resolve_catalog_extension(ext_spec, catalog, "add")
+    if catalog_error:
+        raise ValueError(f"Could not query extension catalog: {catalog_error}")
+    if not ext_info:
+        raise ValueError(f"Extension '{ext_spec}' not found in bundled extensions or catalog")
+
+    resolved_id = ext_info["id"]
+    if resolved_id != ext_spec:
+        bundled_path = _locate_bundled_extension(resolved_id)
+        if bundled_path is not None:
+            if manager.registry.is_installed(resolved_id):
+                return "already installed"
+            manifest = manager.install_from_directory(bundled_path, speckit_version)
+            return f"{manifest.name} v{manifest.version} installed"
+
+    if ext_info.get("bundled") and not ext_info.get("download_url"):
+        from .extensions import REINSTALL_COMMAND
+        raise ValueError(
+            f"Extension '{resolved_id}' is bundled with spec-kit but not found in the installed package. "
+            f"Try reinstalling spec-kit: {REINSTALL_COMMAND}"
+        )
+
+    if not ext_info.get("_install_allowed", True):
+        catalog_name = ext_info.get("_catalog_name", "community")
+        raise ValueError(
+            f"Extension '{ext_spec}' is in the '{catalog_name}' catalog but installation is not allowed from that catalog"
+        )
+
+    zip_path = catalog.download_extension(resolved_id)
+    try:
+        manifest = manager.install_from_zip(zip_path, speckit_version)
+    finally:
+        zip_path.unlink(missing_ok=True)
+    return f"{manifest.name} v{manifest.version} installed"
+
+
 @app.command()
 def init(
     project_name: str = typer.Argument(None, help="Name for your new project directory (optional if using --here, or use '.' for current directory)"),
@@ -980,6 +1073,7 @@ def init(
     branch_numbering: str = typer.Option(None, "--branch-numbering", help="Branch numbering strategy: 'sequential' (001, 002, …, 1000, … — expands past 999 automatically) or 'timestamp' (YYYYMMDD-HHMMSS)"),
     integration: str = typer.Option(None, "--integration", help="Use the new integration system (e.g. --integration copilot). Mutually exclusive with --ai."),
     integration_options: str = typer.Option(None, "--integration-options", help='Options for the integration (e.g. --integration-options="--commands-dir .myagent/cmds")'),
+    extensions: list[str] | None = typer.Option(None, "--extension", help="Install an extension during initialization (bundled name, local path, or HTTPS URL). Repeatable."),
 ):
     """
     Initialize a new Specify project.
@@ -1019,6 +1113,10 @@ def init(
         specify init --here --integration gemini
         specify init my-project --integration generic --integration-options="--commands-dir .myagent/commands/"  # Bring your own agent; requires --commands-dir
         specify init my-project --integration claude --preset healthcare-compliance  # With preset
+        specify init my-project --integration copilot --extension git  # With bundled extension
+        specify init my-project --extension git --extension selftest  # Multiple extensions
+        specify init my-project --extension ./my-extensions/custom-ext  # Local path extension
+        specify init my-project --extension https://example.com/extensions/my-ext.zip  # URL extension
     """
 
     show_banner()
@@ -1262,10 +1360,15 @@ def init(
         ("constitution", "Constitution setup"),
         ("git", "Install git extension"),
         ("workflow", "Install bundled workflow"),
-        ("final", "Finalize"),
     ]:
         tracker.add(key, label)
 
+    if extensions:
+        for i, ext_spec in enumerate(extensions):
+            tracker.add(f"extension-{i}", f"Install extension: {ext_spec}")
+
+    tracker.add("final", "Finalize")
+
     with Live(tracker.render(), console=console, refresh_per_second=8, transient=True) as live:
         tracker.attach_refresh(lambda: live.update(tracker.render()))
         try:
@@ -1470,6 +1573,18 @@ def init(
                 except Exception as preset_err:
                     console.print(f"[yellow]Warning:[/yellow] Failed to install preset: {preset_err}")
 
+            # Install extensions specified via --extension
+            if extensions:
+                speckit_ver = get_speckit_version()
+                for i, ext_spec in enumerate(extensions):
+                    tracker.start(f"extension-{i}")
+                    try:
+                        status_msg = _install_extension_during_init(project_path, ext_spec, speckit_ver)
+                        tracker.complete(f"extension-{i}", status_msg)
+                    except Exception as ext_err:
+                        sanitized_ext = str(ext_err).replace('\n', ' ').strip()
+                        tracker.error(f"extension-{i}", f"failed: {sanitized_ext[:120]}")
+
             tracker.complete("final", "project ready")
         except (typer.Exit, SystemExit):
             raise

tests/integrations/test_cli.py

@@ -628,3 +628,106 @@ class TestSharedInfraCommandRefs:
         assert "/speckit-plan" in content, "Copilot --skills should use /speckit-plan"
         assert "/speckit.plan" not in content, "dot-notation leaked into Copilot skills page template"
         assert "__SPECKIT_COMMAND_" not in content
+
+
+class TestExtensionFlag:
+    """Tests for the --extension flag on specify init."""
+
+    def _run_init(self, tmp_path, args, project_name="ext-test"):
+        from unittest.mock import patch
+        from typer.testing import CliRunner
+        from specify_cli import app
+
+        project = tmp_path / project_name
+        project.mkdir(exist_ok=True)
+        old_cwd = os.getcwd()
+        try:
+            os.chdir(project)
+            runner = CliRunner()
+            # Patch get_speckit_version to return a stable (non-dev) version so that
+            # the extension compatibility check (SpecifierSet(">=0.2.0")) passes.
+            with patch("specify_cli.get_speckit_version", return_value="0.8.2"):
+                result = runner.invoke(app, [
+                    "init", "--here",
+                    "--integration", "copilot",
+                    "--script", "sh",
+                    "--no-git",
+                    "--ignore-agent-tools",
+                ] + args, catch_exceptions=False)
+        finally:
+            os.chdir(old_cwd)
+        return project, result
+
+    def test_bundled_extension_installed(self, tmp_path):
+        """--extension git installs the bundled git extension."""
+        project, result = self._run_init(tmp_path, ["--extension", "git"], project_name="ext-bundled")
+
+        assert result.exit_code == 0, f"init failed:\n{result.output}"
+
+        ext_dir = project / ".specify" / "extensions" / "git"
+        assert ext_dir.exists(), "git extension directory not found"
+        assert (ext_dir / "extension.yml").exists(), "extension.yml not found"
+
+        # Tracker should show extension step as done
+        normalized = _normalize_cli_output(result.output)
+        assert "Install extension: git" in normalized
+
+    def test_multiple_extensions_installed(self, tmp_path):
+        """--extension can be specified multiple times."""
+        project, result = self._run_init(
+            tmp_path,
+            ["--extension", "git", "--extension", "selftest"],
+            project_name="ext-multi",
+        )
+
+        assert result.exit_code == 0, f"init failed:\n{result.output}"
+
+        ext_dir_git = project / ".specify" / "extensions" / "git"
+        ext_dir_selftest = project / ".specify" / "extensions" / "selftest"
+        assert ext_dir_git.exists(), "git extension not installed"
+        assert ext_dir_selftest.exists(), "selftest extension not installed"
+
+    def test_local_path_extension_installed(self, tmp_path):
+        """--extension /abs/path installs from a local absolute directory path."""
+        from specify_cli import _locate_bundled_extension
+
+        # Use the bundled git extension directory as our "local" extension source
+        bundled_git = _locate_bundled_extension("git")
+        assert bundled_git is not None, "bundled git extension not found; cannot run test"
+
+        # Pass the absolute path directly (starts with "/")
+        project, result = self._run_init(
+            tmp_path,
+            ["--extension", str(bundled_git)],
+            project_name="ext-local",
+        )
+
+        assert result.exit_code == 0, f"init failed:\n{result.output}"
+
+        ext_dir = project / ".specify" / "extensions" / "git"
+        assert ext_dir.exists(), "extension from local path not installed"
+
+    def test_unknown_extension_shows_error_in_tracker(self, tmp_path):
+        """An unknown extension name records a tracker error but does not abort init."""
+        project, result = self._run_init(
+            tmp_path,
+            ["--extension", "nonexistent-xyz-ext"],
+            project_name="ext-unknown",
+        )
+
+        assert result.exit_code == 0, "init should not abort on unknown extension"
+        normalized = _normalize_cli_output(result.output)
+        assert "failed" in normalized.lower(), "expected 'failed' for unknown extension"
+
+    def test_extension_flag_works_with_preset(self, tmp_path):
+        """--extension and --preset can be combined."""
+        project, result = self._run_init(
+            tmp_path,
+            ["--extension", "git", "--preset", "lean"],
+            project_name="ext-preset",
+        )
+
+        assert result.exit_code == 0, f"init failed:\n{result.output}"
+
+        ext_dir = project / ".specify" / "extensions" / "git"
+        assert ext_dir.exists(), "git extension not installed alongside preset"