pre-commit · asottile · Jan 17, 2023 · Jan 16, 2023
diff --git a/.github/actions/pre-test/action.yml b/.github/actions/pre-test/action.yml
@@ -19,6 +19,7 @@ runs:
       echo 'C:\Strawberry\perl\site\bin' >> "$GITHUB_PATH"
       echo 'C:\Strawberry\c\bin' >> "$GITHUB_PATH"
 
+      testing/get-coursier.sh
       testing/get-dart.sh
   - name: setup (linux)
     shell: bash

diff --git a/pre_commit/languages/coursier.py b/pre_commit/languages/coursier.py
@@ -1,13 +1,14 @@
 from __future__ import annotations
 
 import contextlib
-import os
+import os.path
 from typing import Generator
 from typing import Sequence
 
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import Var
+from pre_commit.errors import FatalError
 from pre_commit.languages import helpers
 from pre_commit.parse_shebang import find_executable
 from pre_commit.prefix import Prefix
@@ -23,9 +24,8 @@ def install_environment(
         prefix: Prefix,
         version: str,
         additional_dependencies: Sequence[str],
-) -> None:   # pragma: win32 no cover
+) -> None:
     helpers.assert_version_default('coursier', version)
-    helpers.assert_no_additional_deps('coursier', additional_dependencies)
 
     # Support both possible executable names (either "cs" or "coursier")
     executable = find_executable('cs') or find_executable('coursier')
@@ -37,29 +37,40 @@ def install_environment(
 
     envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
     channel = prefix.path('.pre-commit-channel')
-    for app_descriptor in os.listdir(channel):
-        _, app_file = os.path.split(app_descriptor)
-        app, _ = os.path.splitext(app_file)
-        helpers.run_setup_cmd(
-            prefix,
-            (
-                executable,
-                'install',
-                '--default-channels=false',
-                f'--channel={channel}',
-                app,
-                f'--dir={envdir}',
-            ),
+    if os.path.isdir(channel):
+        for app_descriptor in os.listdir(channel):
+            _, app_file = os.path.split(app_descriptor)
+            app, _ = os.path.splitext(app_file)
+            helpers.run_setup_cmd(
+                prefix,
+                (
+                    executable,
+                    'install',
+                    '--default-channels=false',
+                    '--channel', channel,
+                    '--dir', envdir,
+                    app,
+                ),
+            )
+    elif not additional_dependencies:
+        raise FatalError(
+            'expected .pre-commit-channel dir or additional_dependencies',
         )
 
+    if additional_dependencies:
+        install_cmd = (
+            executable, 'install', '--dir', envdir, *additional_dependencies,
+        )
+        helpers.run_setup_cmd(prefix, install_cmd)
+
 
-def get_env_patch(target_dir: str) -> PatchesT:   # pragma: win32 no cover
+def get_env_patch(target_dir: str) -> PatchesT:
     return (
         ('PATH', (target_dir, os.pathsep, Var('PATH'))),
     )
 
 
-@contextlib.contextmanager  # pragma: win32 no cover
+@contextlib.contextmanager
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
     envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir)):

diff --git a/testing/get-coursier.ps1 b/testing/get-coursier.ps1
diff --git a/testing/get-coursier.sh b/testing/get-coursier.sh
@@ -1,15 +1,29 @@
 #!/usr/bin/env bash
-# This is a script used in CI to install coursier
 set -euo pipefail
 
-COURSIER_URL="https://github.com/coursier/coursier/releases/download/v2.0.0/cs-x86_64-pc-linux"
-COURSIER_HASH="e2e838b75bc71b16bcb77ce951ad65660c89bda7957c79a0628ec7146d35122f"
-ARTIFACT="/tmp/coursier/cs"
+if [ "$OSTYPE" = msys ]; then
+    URL='https://github.com/coursier/coursier/releases/download/v2.1.0-RC4/cs-x86_64-pc-win32.zip'
+    SHA256='0d07386ff0f337e3e6264f7dde29d137dda6eaa2385f29741435e0b93ccdb49d'
+    TARGET='/tmp/coursier/cs.zip'
 
-mkdir -p /tmp/coursier
-rm -f "$ARTIFACT"
-curl --location --silent --output "$ARTIFACT" "$COURSIER_URL"
-echo "$COURSIER_HASH  $ARTIFACT" | sha256sum --check
-chmod ugo+x /tmp/coursier/cs
+    unpack() {
+        unzip "$TARGET" -d /tmp/coursier
+        mv /tmp/coursier/cs-*.exe /tmp/coursier/cs.exe
+        cygpath -w /tmp/coursier >> "$GITHUB_PATH"
+    }
+else
+    URL='https://github.com/coursier/coursier/releases/download/v2.1.0-RC4/cs-x86_64-pc-linux.gz'
+    SHA256='176e92e08ab292531aa0c4993dbc9f2c99dec79578752f3b9285f54f306db572'
+    TARGET=/tmp/coursier/cs.gz
+
+    unpack() {
+        gunzip "$TARGET"
+        chmod +x /tmp/coursier/cs
+        echo /tmp/coursier >> "$GITHUB_PATH"
+    }
+fi
 
-echo '/tmp/coursier' >> "$GITHUB_PATH"
+mkdir -p /tmp/coursier
+curl --location --silent --output "$TARGET" "$URL"
+echo "$SHA256 $TARGET" | sha256sum --check
+unpack
diff --git a/testing/language_helpers.py b/testing/language_helpers.py
@@ -0,0 +1,33 @@
+from __future__ import annotations
+
+import os
+from typing import Sequence
+
+import pre_commit.constants as C
+from pre_commit.languages.all import Language
+from pre_commit.prefix import Prefix
+
+
+def run_language(
+        path: os.PathLike[str],
+        language: Language,
+        exe: str,
+        args: Sequence[str] = (),
+        file_args: Sequence[str] = (),
+        version: str = C.DEFAULT,
+        deps: Sequence[str] = (),
+) -> tuple[int, bytes]:
+    prefix = Prefix(str(path))
+
+    language.install_environment(prefix, version, deps)
+    with language.in_env(prefix, version):
+        ret, out = language.run_hook(
+            prefix,
+            exe,
+            args,
+            file_args,
+            require_serial=True,
+            color=False,
+        )
+        out = out.replace(b'\r\n', b'\n')
+        return ret, out
diff --git a/testing/resources/coursier_hooks_repo/.pre-commit-channel/echo-java.json b/testing/resources/coursier_hooks_repo/.pre-commit-channel/echo-java.json
diff --git a/testing/resources/coursier_hooks_repo/.pre-commit-hooks.yaml b/testing/resources/coursier_hooks_repo/.pre-commit-hooks.yaml
diff --git a/testing/util.py b/testing/util.py
@@ -42,10 +42,6 @@ def cmd_output_mocked_pre_commit_home(
     return ret, out.replace('\r\n', '\n'), None
 
 
-skipif_cant_run_coursier = pytest.mark.skipif(
-    os.name == 'nt' or parse_shebang.find_executable('cs') is None,
-    reason="coursier isn't installed or can't be found",
-)
 skipif_cant_run_docker = pytest.mark.skipif(
     os.name == 'nt' or not docker_is_running(),
     reason="Docker isn't running or can't be accessed",

diff --git a/tests/languages/coursier_test.py b/tests/languages/coursier_test.py
@@ -0,0 +1,45 @@
+from __future__ import annotations
+
+import pytest
+
+from pre_commit.errors import FatalError
+from pre_commit.languages import coursier
+from testing.language_helpers import run_language
+
+
+def test_coursier_hook(tmp_path):
+    echo_java_json = '''\
+{
+  "repositories": ["central"],
+  "dependencies": ["io.get-coursier:echo:latest.stable"]
+}
+'''
+
+    channel_dir = tmp_path.joinpath('.pre-commit-channel')
+    channel_dir.mkdir()
+    channel_dir.joinpath('echo-java.json').write_text(echo_java_json)
+
+    ret = run_language(
+        tmp_path,
+        coursier,
+        'echo-java',
+        args=('Hello', 'World', 'from', 'coursier'),
+    )
+    assert ret == (0, b'Hello World from coursier\n')
+
+
+def test_coursier_hook_additional_dependencies(tmp_path):
+    ret = run_language(
+        tmp_path,
+        coursier,
+        'scalafmt --version',
+        deps=('scalafmt:3.6.1',),
+    )
+    assert ret == (0, b'scalafmt 3.6.1\n')
+
+
+def test_error_if_no_deps_or_channel(tmp_path):
+    with pytest.raises(FatalError) as excinfo:
+        run_language(tmp_path, coursier, 'dne')
+    msg, = excinfo.value.args
+    assert msg == 'expected .pre-commit-channel dir or additional_dependencies'
diff --git a/tests/repository_test.py b/tests/repository_test.py
@@ -32,7 +32,6 @@
 from testing.fixtures import modify_manifest
 from testing.util import cwd
 from testing.util import get_resource_path
-from testing.util import skipif_cant_run_coursier
 from testing.util import skipif_cant_run_docker
 from testing.util import skipif_cant_run_lua
 from testing.util import skipif_cant_run_swift
@@ -199,15 +198,6 @@ def test_language_versioned_python_hook(tempdir_factory, store):
         )
 
 
-@skipif_cant_run_coursier  # pragma: win32 no cover
-def test_run_a_coursier_hook(tempdir_factory, store):
-    _test_hook_repo(
-        tempdir_factory, store, 'coursier_hooks_repo',
-        'echo-java',
-        ['Hello World from coursier'], b'Hello World from coursier\n',
-    )
-
-
 @skipif_cant_run_docker  # pragma: win32 no cover
 def test_run_a_docker_hook(tempdir_factory, store):
     _test_hook_repo(