1 files changed, 146 insertions, 0 deletions
diff --git a/testing/fixtures.py b/testing/fixtures.py
new file mode 100644
index 0000000..f7def08
--- /dev/null
+++ b/testing/fixtures.py
@@ -0,0 +1,146 @@
+import contextlib
+import os.path
+import shutil
+
+from cfgv import apply_defaults
+from cfgv import validate
+
+import pre_commit.constants as C
+from pre_commit import git
+from pre_commit.clientlib import CONFIG_SCHEMA
+from pre_commit.clientlib import load_manifest
+from pre_commit.util import cmd_output
+from pre_commit.util import yaml_dump
+from pre_commit.util import yaml_load
+from testing.util import get_resource_path
+from testing.util import git_commit
+
+
+def copy_tree_to_path(src_dir, dest_dir):
+    """Copies all of the things inside src_dir to an already existing dest_dir.
+
+    This looks eerily similar to shutil.copytree, but copytree has no option
+    for not creating dest_dir.
+    """
+    names = os.listdir(src_dir)
+
+    for name in names:
+        srcname = os.path.join(src_dir, name)
+        destname = os.path.join(dest_dir, name)
+
+        if os.path.isdir(srcname):
+            shutil.copytree(srcname, destname)
+        else:
+            shutil.copy(srcname, destname)
+
+
+def git_dir(tempdir_factory):
+    path = tempdir_factory.get()
+    cmd_output('git', 'init', path)
+    return path
+
+
+def make_repo(tempdir_factory, repo_source):
+    path = git_dir(tempdir_factory)
+    copy_tree_to_path(get_resource_path(repo_source), path)
+    cmd_output('git', 'add', '.', cwd=path)
+    git_commit(msg=make_repo.__name__, cwd=path)
+    return path
+
+
+@contextlib.contextmanager
+def modify_manifest(path, commit=True):
+    """Modify the manifest yielded by this context to write to
+    .pre-commit-hooks.yaml.
+    """
+    manifest_path = os.path.join(path, C.MANIFEST_FILE)
+    with open(manifest_path) as f:
+        manifest = yaml_load(f.read())
+    yield manifest
+    with open(manifest_path, 'w') as manifest_file:
+        manifest_file.write(yaml_dump(manifest))
+    if commit:
+        git_commit(msg=modify_manifest.__name__, cwd=path)
+
+
+@contextlib.contextmanager
+def modify_config(path='.', commit=True):
+    """Modify the config yielded by this context to write to
+    .pre-commit-config.yaml
+    """
+    config_path = os.path.join(path, C.CONFIG_FILE)
+    with open(config_path) as f:
+        config = yaml_load(f.read())
+    yield config
+    with open(config_path, 'w', encoding='UTF-8') as config_file:
+        config_file.write(yaml_dump(config))
+    if commit:
+        git_commit(msg=modify_config.__name__, cwd=path)
+
+
+def sample_local_config():
+    return {
+        'repo': 'local',
+        'hooks': [{
+            'id': 'do_not_commit',
+            'name': 'Block if "DO NOT COMMIT" is found',
+            'entry': 'DO NOT COMMIT',
+            'language': 'pygrep',
+        }],
+    }
+
+
+def sample_meta_config():
+    return {'repo': 'meta', 'hooks': [{'id': 'check-useless-excludes'}]}
+
+
+def make_config_from_repo(repo_path, rev=None, hooks=None, check=True):
+    manifest = load_manifest(os.path.join(repo_path, C.MANIFEST_FILE))
+    config = {
+        'repo': f'file://{repo_path}',
+        'rev': rev or git.head_rev(repo_path),
+        'hooks': hooks or [{'id': hook['id']} for hook in manifest],
+    }
+
+    if check:
+        wrapped = validate({'repos': [config]}, CONFIG_SCHEMA)
+        wrapped = apply_defaults(wrapped, CONFIG_SCHEMA)
+        config, = wrapped['repos']
+        return config
+    else:
+        return config
+
+
+def read_config(directory, config_file=C.CONFIG_FILE):
+    config_path = os.path.join(directory, config_file)
+    with open(config_path) as f:
+        config = yaml_load(f.read())
+    return config
+
+
+def write_config(directory, config, config_file=C.CONFIG_FILE):
+    if type(config) is not list and 'repos' not in config:
+        assert isinstance(config, dict), config
+        config = {'repos': [config]}
+    with open(os.path.join(directory, config_file), 'w') as outfile:
+        outfile.write(yaml_dump(config))
+
+
+def add_config_to_repo(git_path, config, config_file=C.CONFIG_FILE):
+    write_config(git_path, config, config_file=config_file)
+    cmd_output('git', 'add', config_file, cwd=git_path)
+    git_commit(msg=add_config_to_repo.__name__, cwd=git_path)
+    return git_path
+
+
+def remove_config_from_repo(git_path, config_file=C.CONFIG_FILE):
+    cmd_output('git', 'rm', config_file, cwd=git_path)
+    git_commit(msg=remove_config_from_repo.__name__, cwd=git_path)
+    return git_path
+
+
+def make_consuming_repo(tempdir_factory, repo_source):
+    path = make_repo(tempdir_factory, repo_source)
+    config = make_config_from_repo(path)
+    git_path = git_dir(tempdir_factory)
+    return add_config_to_repo(git_path, config)