ruff: Fix SIM115 Use a context manager for opening files.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

scripts/zulip-puppet-apply

@@ -66,25 +66,24 @@ puppet_env["FACTER_zulip_scripts_path"] = scripts_path
 def noop_would_change(puppet_cmd: list[str]) -> bool:
     # --noop does not work with --detailed-exitcodes; see
     # https://tickets.puppetlabs.com/browse/PUP-686
+    with tempfile.NamedTemporaryFile() as lastrun_file:
         try:
-        lastrun_file = tempfile.NamedTemporaryFile()
             subprocess.check_call(
                 # puppet_cmd may already contain --noop, but it is safe to
                 # supply twice
                 [*puppet_cmd, "--noop", "--lastrunfile", lastrun_file.name],
                 env=puppet_env,
             )
+        except subprocess.CalledProcessError:
+            sys.exit(2)
 
+        # Reopen the file since Puppet rewrote it with a new inode
         with open(lastrun_file.name) as lastrun:
             lastrun_data = yaml.safe_load(lastrun)
             resources = lastrun_data.get("resources", {})
             if resources.get("failed", 0) != 0:
                 sys.exit(2)
             return resources.get("out_of_sync", 0) != 0
-    except subprocess.CalledProcessError:
-        sys.exit(2)
-    finally:
-        lastrun_file.close()
 
 
 if not args.noop and not args.force:

tools/renumber-migrations

@@ -24,7 +24,7 @@ def renumber_migration(conflicts: list[str], order: list[int], last_correct_migr
             stack.append(conflicts[i - 1][0:4])
         else:
             # Replace dependencies with the last correct migration
-            file = fileinput.FileInput("zerver/migrations/" + conflicts[i - 1], inplace=True)
+            with fileinput.FileInput("zerver/migrations/" + conflicts[i - 1], inplace=True) as file:
                 for line in file:
                     print(re.sub(r"[\d]+(_[a-z0-9]+)+", last_correct_migration, line), end="")
 

zerver/management/commands/backup.py

@@ -2,6 +2,7 @@ import os
 import re
 import tempfile
 from argparse import ArgumentParser, RawTextHelpFormatter
+from contextlib import ExitStack
 from typing import Any
 
 from django.conf import settings
@@ -33,9 +34,10 @@ class Command(ZulipBaseCommand):
     @override
     def handle(self, *args: Any, **options: Any) -> None:
         timestamp = timezone_now().strftime(TIMESTAMP_FORMAT)
-        with tempfile.TemporaryDirectory(
-            prefix=f"zulip-backup-{timestamp}-",
-        ) as tmp:
+        with ExitStack() as stack:
+            tmp = stack.enter_context(
+                tempfile.TemporaryDirectory(prefix=f"zulip-backup-{timestamp}-")
+            )
             os.mkdir(os.path.join(tmp, "zulip-backup"))
             members = []
             paths = []
@@ -121,10 +123,12 @@ class Command(ZulipBaseCommand):
 
             try:
                 if options["output"] is None:
-                    tarball_path = tempfile.NamedTemporaryFile(
+                    tarball_path = stack.enter_context(
+                        tempfile.NamedTemporaryFile(
                             prefix=f"zulip-backup-{timestamp}-",
                             suffix=".tar.gz",
                             delete=False,
+                        )
                     ).name
                 else:
                     tarball_path = options["output"]