Merge pull request #3578 from pre-commit/store-gc-refactor

refactor gc into store

pre_commit/commands/gc.py

@@ -1,89 +1,9 @@
 from __future__ import annotations
 
-import os.path
-from typing import Any
-
-import pre_commit.constants as C
 from pre_commit import output
-from pre_commit.clientlib import InvalidConfigError
-from pre_commit.clientlib import InvalidManifestError
-from pre_commit.clientlib import load_config
-from pre_commit.clientlib import load_manifest
-from pre_commit.clientlib import LOCAL
-from pre_commit.clientlib import META
 from pre_commit.store import Store
 
 
-def _mark_used_repos(
-        store: Store,
-        all_repos: dict[tuple[str, str], str],
-        unused_repos: set[tuple[str, str]],
-        repo: dict[str, Any],
-) -> None:
-    if repo['repo'] == META:
-        return
-    elif repo['repo'] == LOCAL:
-        for hook in repo['hooks']:
-            deps = hook.get('additional_dependencies')
-            unused_repos.discard((
-                store.db_repo_name(repo['repo'], deps), C.LOCAL_REPO_VERSION,
-            ))
-    else:
-        key = (repo['repo'], repo['rev'])
-        path = all_repos.get(key)
-        # can't inspect manifest if it isn't cloned
-        if path is None:
-            return
-
-        try:
-            manifest = load_manifest(os.path.join(path, C.MANIFEST_FILE))
-        except InvalidManifestError:
-            return
-        else:
-            unused_repos.discard(key)
-            by_id = {hook['id']: hook for hook in manifest}
-
-        for hook in repo['hooks']:
-            if hook['id'] not in by_id:
-                continue
-
-            deps = hook.get(
-                'additional_dependencies',
-                by_id[hook['id']]['additional_dependencies'],
-            )
-            unused_repos.discard((
-                store.db_repo_name(repo['repo'], deps), repo['rev'],
-            ))
-
-
-def _gc_repos(store: Store) -> int:
-    configs = store.select_all_configs()
-    repos = store.select_all_repos()
-
-    # delete config paths which do not exist
-    dead_configs = [p for p in configs if not os.path.exists(p)]
-    live_configs = [p for p in configs if os.path.exists(p)]
-
-    all_repos = {(repo, ref): path for repo, ref, path in repos}
-    unused_repos = set(all_repos)
-    for config_path in live_configs:
-        try:
-            config = load_config(config_path)
-        except InvalidConfigError:
-            dead_configs.append(config_path)
-            continue
-        else:
-            for repo in config['repos']:
-                _mark_used_repos(store, all_repos, unused_repos, repo)
-
-    store.delete_configs(dead_configs)
-    for db_repo_name, ref in unused_repos:
-        store.delete_repo(db_repo_name, ref, all_repos[(db_repo_name, ref)])
-    return len(unused_repos)
-
-
 def gc(store: Store) -> int:
-    with store.exclusive_lock():
-        repos_removed = _gc_repos(store)
-    output.write_line(f'{repos_removed} repo(s) removed.')
+    output.write_line(f'{store.gc()} repo(s) removed.')
     return 0

pre_commit/store.py

@@ -8,6 +8,7 @@ import tempfile
 from collections.abc import Callable
 from collections.abc import Generator
 from collections.abc import Sequence
+from typing import Any
 
 import pre_commit.constants as C
 from pre_commit import clientlib
@@ -96,7 +97,7 @@ class Store:
                     '    PRIMARY KEY (repo, ref)'
                     ');',
                 )
-                self._create_config_table(db)
+                self._create_configs_table(db)
 
             # Atomic file move
             os.replace(tmpfile, self.db_path)
@@ -215,7 +216,7 @@ class Store:
             'local', C.LOCAL_REPO_VERSION, deps, _make_local_repo,
         )
 
-    def _create_config_table(self, db: sqlite3.Connection) -> None:
+    def _create_configs_table(self, db: sqlite3.Connection) -> None:
         db.executescript(
             'CREATE TABLE IF NOT EXISTS configs ('
             '   path TEXT NOT NULL,'
@@ -232,28 +233,83 @@ class Store:
             return
         with self.connect() as db:
             # TODO: eventually remove this and only create in _create
-            self._create_config_table(db)
+            self._create_configs_table(db)
             db.execute('INSERT OR IGNORE INTO configs VALUES (?)', (path,))
 
-    def select_all_configs(self) -> list[str]:
-        with self.connect() as db:
-            self._create_config_table(db)
-            rows = db.execute('SELECT path FROM configs').fetchall()
-            return [path for path, in rows]
+    def _mark_used_repos(
+            self,
+            all_repos: dict[tuple[str, str], str],
+            unused_repos: set[tuple[str, str]],
+            repo: dict[str, Any],
+    ) -> None:
+        if repo['repo'] == clientlib.META:
+            return
+        elif repo['repo'] == clientlib.LOCAL:
+            for hook in repo['hooks']:
+                deps = hook.get('additional_dependencies')
+                unused_repos.discard((
+                    self.db_repo_name(repo['repo'], deps),
+                    C.LOCAL_REPO_VERSION,
+                ))
+        else:
+            key = (repo['repo'], repo['rev'])
+            path = all_repos.get(key)
+            # can't inspect manifest if it isn't cloned
+            if path is None:
+                return
 
-    def delete_configs(self, configs: list[str]) -> None:
-        with self.connect() as db:
-            rows = [(path,) for path in configs]
-            db.executemany('DELETE FROM configs WHERE path = ?', rows)
+            try:
+                manifest = clientlib.load_manifest(
+                    os.path.join(path, C.MANIFEST_FILE),
+                )
+            except clientlib.InvalidManifestError:
+                return
+            else:
+                unused_repos.discard(key)
+                by_id = {hook['id']: hook for hook in manifest}
 
-    def select_all_repos(self) -> list[tuple[str, str, str]]:
-        with self.connect() as db:
-            return db.execute('SELECT repo, ref, path from repos').fetchall()
+            for hook in repo['hooks']:
+                if hook['id'] not in by_id:
+                    continue
 
-    def delete_repo(self, db_repo_name: str, ref: str, path: str) -> None:
-        with self.connect() as db:
-            db.execute(
+                deps = hook.get(
+                    'additional_dependencies',
+                    by_id[hook['id']]['additional_dependencies'],
+                )
+                unused_repos.discard((
+                    self.db_repo_name(repo['repo'], deps), repo['rev'],
+                ))
+
+    def gc(self) -> int:
+        with self.exclusive_lock(), self.connect() as db:
+            self._create_configs_table(db)
+
+            repos = db.execute('SELECT repo, ref, path FROM repos').fetchall()
+            all_repos = {(repo, ref): path for repo, ref, path in repos}
+            unused_repos = set(all_repos)
+
+            configs_rows = db.execute('SELECT path FROM configs').fetchall()
+            configs = [path for path, in configs_rows]
+
+            dead_configs = []
+            for config_path in configs:
+                try:
+                    config = clientlib.load_config(config_path)
+                except clientlib.InvalidConfigError:
+                    dead_configs.append(config_path)
+                    continue
+                else:
+                    for repo in config['repos']:
+                        self._mark_used_repos(all_repos, unused_repos, repo)
+
+            paths = [(path,) for path in dead_configs]
+            db.executemany('DELETE FROM configs WHERE path = ?', paths)
+
+            db.executemany(
                 'DELETE FROM repos WHERE repo = ? and ref = ?',
-                (db_repo_name, ref),
+                sorted(unused_repos),
             )
-        rmtree(path)
+            for k in unused_repos:
+                rmtree(all_repos[k])
+
+            return len(unused_repos)

tests/commands/gc_test.py

@@ -19,11 +19,13 @@ from testing.util import git_commit
 
 
 def _repo_count(store):
-    return len(store.select_all_repos())
+    with store.connect() as db:
+        return db.execute('SELECT COUNT(1) FROM repos').fetchone()[0]
 
 
 def _config_count(store):
-    return len(store.select_all_configs())
+    with store.connect() as db:
+        return db.execute('SELECT COUNT(1) FROM configs').fetchone()[0]
 
 
 def _remove_config_assert_cleared(store, cap_out):
@@ -153,7 +155,8 @@ def test_invalid_manifest_gcd(tempdir_factory, store, in_git_dir, cap_out):
     install_hooks(C.CONFIG_FILE, store)
 
     # we'll "break" the manifest to simulate an old version clone
-    (_, _, path), = store.select_all_repos()
+    with store.connect() as db:
+        path, = db.execute('SELECT path FROM repos').fetchone()
     os.remove(os.path.join(path, C.MANIFEST_FILE))
 
     assert _config_count(store) == 1

tests/store_test.py

@@ -22,6 +22,17 @@ from testing.util import git_commit
 from testing.util import xfailif_windows
 
 
+def _select_all_configs(store: Store) -> list[str]:
+    with store.connect() as db:
+        rows = db.execute('SELECT * FROM configs').fetchall()
+        return [path for path, in rows]
+
+
+def _select_all_repos(store: Store) -> list[tuple[str, str, str]]:
+    with store.connect() as db:
+        return db.execute('SELECT repo, ref, path FROM repos').fetchall()
+
+
 def test_our_session_fixture_works():
     """There's a session fixture which makes `Store` invariantly raise to
     prevent writing to the home directory.
@@ -91,7 +102,7 @@ def test_clone(store, tempdir_factory, caplog):
     assert git.head_rev(ret) == rev
 
     # Assert there's an entry in the sqlite db for this
-    assert store.select_all_repos() == [(path, rev, ret)]
+    assert _select_all_repos(store) == [(path, rev, ret)]
 
 
 def test_warning_for_deprecated_stages_on_init(store, tempdir_factory, caplog):
@@ -217,7 +228,7 @@ def test_clone_shallow_failure_fallback_to_complete(
     assert git.head_rev(ret) == rev
 
     # Assert there's an entry in the sqlite db for this
-    assert store.select_all_repos() == [(path, rev, ret)]
+    assert _select_all_repos(store) == [(path, rev, ret)]
 
 
 def test_clone_tag_not_on_mainline(store, tempdir_factory):
@@ -265,7 +276,7 @@ def test_mark_config_as_used(store, tmpdir):
     with tmpdir.as_cwd():
         f = tmpdir.join('f').ensure()
         store.mark_config_used('f')
-        assert store.select_all_configs() == [f.strpath]
+        assert _select_all_configs(store) == [f.strpath]
 
 
 def test_mark_config_as_used_idempotent(store, tmpdir):
@@ -275,7 +286,7 @@ def test_mark_config_as_used_idempotent(store, tmpdir):
 
 def test_mark_config_as_used_does_not_exist(store):
     store.mark_config_used('f')
-    assert store.select_all_configs() == []
+    assert _select_all_configs(store) == []
 
 
 def _simulate_pre_1_14_0(store):
@@ -283,9 +294,9 @@ def _simulate_pre_1_14_0(store):
         db.executescript('DROP TABLE configs')
 
 
-def test_select_all_configs_roll_forward(store):
+def test_gc_roll_forward(store):
     _simulate_pre_1_14_0(store)
-    assert store.select_all_configs() == []
+    assert store.gc() == 0
 
 
 def test_mark_config_as_used_roll_forward(store, tmpdir):
@@ -314,7 +325,7 @@ def test_mark_config_as_used_readonly(tmpdir):
     assert store.readonly
     # should be skipped due to readonly
     store.mark_config_used(str(cfg))
-    assert store.select_all_configs() == []
+    assert _select_all_configs(store) == []
 
 
 def test_clone_with_recursive_submodules(store, tmp_path):