[gobject-introspection: 2/3] Always close files

[Christoph Reiter <creiter src gnome org>]

commit dd378ee46082862f711629d40ed33f944d1e3259
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Sat Nov 7 08:54:50 2020 +0100

    Always close files
    
    This means flushing changes and closing the fd. Otherwise this is done
    by the GC eventually..
    
    Detected using PYTHONTRACEMALLOC=1 PYTHONDEVMODE=1

 giscanner/cachestore.py  | 20 +++++++++++---------
 giscanner/scannermain.py | 14 +++++++-------
 2 files changed, 18 insertions(+), 16 deletions(-)
---
diff --git a/giscanner/cachestore.py b/giscanner/cachestore.py
index e3b76058d..3512badc8 100644
--- a/giscanner/cachestore.py
+++ b/giscanner/cachestore.py
@@ -169,12 +169,14 @@ class CacheStore(object):
                 return None
             else:
                 raise
-        if not self._cache_is_valid(store_filename, filename):
-            return None
-        try:
-            data = pickle.load(fd)
-        except Exception:
-            # Broken cache entry, remove it
-            self._remove_filename(store_filename)
-            data = None
-        return data
+
+        with fd:
+            if not self._cache_is_valid(store_filename, filename):
+                return None
+            try:
+                data = pickle.load(fd)
+            except Exception:
+                # Broken cache entry, remove it
+                self._remove_filename(store_filename)
+                data = None
+            return data
diff --git a/giscanner/scannermain.py b/giscanner/scannermain.py
index f80b2cfe7..957ba0b7a 100644
--- a/giscanner/scannermain.py
+++ b/giscanner/scannermain.py
@@ -472,6 +472,10 @@ def write_output(data, options):
     """Write encoded XML 'data' to the filename specified in 'options'."""
     if options.output == "-":
         output = sys.stdout
+        try:
+            output.write(data)
+        except IOError as e:
+            _error("while writing output: %s" % (e.strerror, ))
     elif options.reparse_validate_gir:
         main_f, main_f_name = tempfile.mkstemp(suffix='.gir')
 
@@ -500,14 +504,10 @@ def write_output(data, options):
         return 0
     else:
         try:
-            output = open(options.output, 'wb')
+            with open(options.output, 'wb') as output:
+                output.write(data)
         except IOError as e:
-            _error("opening output for writing: %s" % (e.strerror, ))
-
-    try:
-        output.write(data)
-    except IOError as e:
-        _error("while writing output: %s" % (e.strerror, ))
+            _error("opening/writing output: %s" % (e.strerror, ))
 
 
 def get_source_root_dirs(options, filenames):