Always close files in distutils code and tests (#10252).

Lib/distutils/ccompiler.py

@@ -779,6 +779,7 @@ class CCompiler:
             library_dirs = []
         fd, fname = tempfile.mkstemp(".c", funcname, text=True)
         f = os.fdopen(fd, "w")
+        try:
             for incl in includes:
                 f.write("""#include "%s"\n""" % incl)
             f.write("""\
@@ -786,6 +787,7 @@ main (int argc, char **argv) {
     %s();
 }
 """ % funcname)
+        finally:
             f.close()
         try:
             objects = self.compile([fname], include_dirs=include_dirs)

Lib/distutils/command/bdist_wininst.py

@@ -340,4 +340,8 @@ class bdist_wininst(Command):
             sfix = ''
 
         filename = os.path.join(directory, "wininst-%.1f%s.exe" % (bv, sfix))
-        return open(filename, "rb").read()
+        f = open(filename, "rb")
+        try:
+            return f.read()
+        finally:
+            f.close()

Lib/distutils/command/upload.py

@@ -76,7 +76,11 @@ class upload(PyPIRCCommand):
 
         # Fill in the data - send all the meta-data in case we need to
         # register a new release
-        content = open(filename,'rb').read()
+        f = open(filename,'rb')
+        try:
+            content = f.read()
+        finally:
+            f.close()
         meta = self.distribution.metadata
         data = {
             # action

Lib/distutils/core.py

@@ -215,7 +215,11 @@ def run_setup (script_name, script_args=None, stop_after="run"):
             sys.argv[0] = script_name
             if script_args is not None:
                 sys.argv[1:] = script_args
-            exec(open(script_name).read(), g, l)
+            f = open(script_name)
+            try:
+                exec(f.read(), g, l)
+            finally:
+                f.close()
         finally:
             sys.argv = save_argv
             _setup_stop_after = None

Lib/distutils/cygwinccompiler.py

@@ -350,11 +350,14 @@ def check_config_h():
     # let's see if __GNUC__ is mentioned in python.h
     fn = sysconfig.get_config_h_filename()
     try:
-        with open(fn) as config_h:
+        config_h = open(fn)
+        try:
             if "__GNUC__" in config_h.read():
                 return CONFIG_H_OK, "'%s' mentions '__GNUC__'" % fn
             else:
                 return CONFIG_H_NOTOK, "'%s' does not mention '__GNUC__'" % fn
+        finally:
+            config_h.close()
     except IOError as exc:
         return (CONFIG_H_UNCERTAIN,
                 "couldn't read '%s': %s" % (fn, exc.strerror))

Lib/distutils/dist.py

@@ -1013,7 +1013,9 @@ class DistributionMetadata:
         """Write the PKG-INFO file into the release tree.
         """
         pkg_info = open(os.path.join(base_dir, 'PKG-INFO'), 'w')
+        try:
             self.write_pkg_file(pkg_info)
+        finally:
             pkg_info.close()
 
     def write_pkg_file(self, file):

Lib/distutils/emxccompiler.py

@@ -270,7 +270,9 @@ def check_config_h():
         # It would probably better to read single lines to search.
         # But we do this only once, and it is fast enough
         f = open(fn)
+        try:
             s = f.read()
+        finally:
             f.close()
 
     except IOError as exc:
@@ -298,7 +300,9 @@ def get_versions():
     gcc_exe = find_executable('gcc')
     if gcc_exe:
         out = os.popen(gcc_exe + ' -dumpversion','r')
+        try:
             out_string = out.read()
+        finally:
             out.close()
         result = re.search('(\d+\.\d+\.\d+)', out_string, re.ASCII)
         if result:

Lib/distutils/extension.py

@@ -149,6 +149,7 @@ def read_setup_file(filename):
     file = TextFile(filename,
                     strip_comments=1, skip_blanks=1, join_lines=1,
                     lstrip_ws=1, rstrip_ws=1)
+    try:
         extensions = []
 
         while True:
@@ -228,5 +229,7 @@ def read_setup_file(filename):
                     file.warn("unrecognized argument '%s'" % word)
 
             extensions.append(ext)
+    finally:
+        file.close()
 
     return extensions

Lib/distutils/file_util.py

@@ -234,6 +234,8 @@ def write_file (filename, contents):
     sequence of strings without line terminators) to it.
     """
     f = open(filename, "w")
+    try:
         for line in contents:
             f.write(line + "\n")
+    finally:
         f.close()

Lib/distutils/tests/test_build_py.py

@@ -19,10 +19,14 @@ class BuildPyTestCase(support.TempdirManager,
     def test_package_data(self):
         sources = self.mkdtemp()
         f = open(os.path.join(sources, "__init__.py"), "w")
+        try:
             f.write("# Pretend this is a package.")
+        finally:
             f.close()
         f = open(os.path.join(sources, "README.txt"), "w")
+        try:
             f.write("Info about this package")
+        finally:
             f.close()
 
         destination = self.mkdtemp()

Lib/distutils/tests/test_build_scripts.py

@@ -71,7 +71,9 @@ class BuildScriptsTestCase(support.TempdirManager,
 
     def write_script(self, dir, name, text):
         f = open(os.path.join(dir, name), "w")
+        try:
             f.write(text)
+        finally:
             f.close()
 
     def test_version_int(self):

Lib/distutils/tests/test_config.py

@@ -105,8 +105,12 @@ class PyPIRCCommandTestCase(support.TempdirManager,
         self.assertTrue(not os.path.exists(rc))
         cmd._store_pypirc('tarek', 'xxx')
         self.assertTrue(os.path.exists(rc))
-        content = open(rc).read()
+        f = open(rc)
+        try:
+            content = f.read()
             self.assertEquals(content, WANTED)
+        finally:
+            f.close()
 
 def test_suite():
     return unittest.makeSuite(PyPIRCCommandTestCase)

Lib/distutils/tests/test_core.py

@@ -52,7 +52,11 @@ class CoreTestCase(support.EnvironGuard, unittest.TestCase):
             shutil.rmtree(path)
 
     def write_setup(self, text, path=test.support.TESTFN):
-        open(path, "w").write(text)
+        f = open(path, "w")
+        try:
+            f.write(text)
+        finally:
+            f.close()
         return path
 
     def test_run_setup_provides_file(self):

Lib/distutils/tests/test_dir_util.py

@@ -88,7 +88,9 @@ class DirUtilTestCase(support.TempdirManager, unittest.TestCase):
         mkpath(self.target, verbose=0)
         a_file = os.path.join(self.target, 'ok.txt')
         f = open(a_file, 'w')
+        try:
             f.write('some content')
+        finally:
             f.close()
 
         wanted = ['copying %s -> %s' % (a_file, self.target2)]

Lib/distutils/tests/test_dist.py

@@ -79,11 +79,14 @@ class DistributionTestCase(support.LoggingSilencer,
 
     def test_command_packages_configfile(self):
         sys.argv.append("build")
+        self.addCleanup(os.unlink, TESTFN)
         f = open(TESTFN, "w")
         try:
             print("[global]", file=f)
             print("command_packages = foo.bar, splat", file=f)
+        finally:
             f.close()
+
         d = self.create_distribution([TESTFN])
         self.assertEqual(d.get_command_packages(),
                          ["distutils.command", "foo.bar", "splat"])
@@ -100,9 +103,6 @@ class DistributionTestCase(support.LoggingSilencer,
         d = self.create_distribution([TESTFN])
         self.assertEqual(d.get_command_packages(), ["distutils.command"])
 
-        finally:
-            os.unlink(TESTFN)
-
     def test_empty_options(self):
         # an empty options dictionary should not stay in the
         # list of attributes
@@ -260,7 +260,9 @@ class MetadataTestCase(support.TempdirManager, support.EnvironGuard,
         temp_dir = self.mkdtemp()
         user_filename = os.path.join(temp_dir, user_filename)
         f = open(user_filename, 'w')
+        try:
             f.write('.')
+        finally:
             f.close()
 
         try:

Lib/distutils/tests/test_file_util.py

@@ -31,7 +31,9 @@ class FileUtilTestCase(support.TempdirManager, unittest.TestCase):
 
     def test_move_file_verbosity(self):
         f = open(self.source, 'w')
+        try:
             f.write('some content')
+        finally:
             f.close()
 
         move_file(self.source, self.target, verbose=0)

Lib/distutils/tests/test_install.py

@@ -182,8 +182,11 @@ class InstallTestCase(support.TempdirManager,
 
         # let's check the RECORD file was created with one
         # line (the egg info file)
-        with open(cmd.record) as f:
+        f = open(cmd.record)
+        try:
             self.assertEquals(len(f.readlines()), 1)
+        finally:
+            f.close()
 
     def test_debug_mode(self):
         # this covers the code called when DEBUG is set

Lib/distutils/tests/test_msvc9compiler.py

@@ -113,7 +113,9 @@ class msvc9compilerTestCase(support.TempdirManager,
         tempdir = self.mkdtemp()
         manifest = os.path.join(tempdir, 'manifest')
         f = open(manifest, 'w')
+        try:
             f.write(_MANIFEST)
+        finally:
             f.close()
 
         compiler = MSVCCompiler()
@@ -121,8 +123,10 @@ class msvc9compilerTestCase(support.TempdirManager,
 
         # see what we got
         f = open(manifest)
+        try:
             # removing trailing spaces
             content = '\n'.join([line.rstrip() for line in f.readlines()])
+        finally:
             f.close()
 
         # makes sure the manifest was properly cleaned

Lib/distutils/tests/test_register.py

@@ -118,8 +118,12 @@ class RegisterTestCase(PyPIRCCommandTestCase):
         self.assertTrue(os.path.exists(self.rc))
 
         # with the content similar to WANTED_PYPIRC
-        content = open(self.rc).read()
+        f = open(self.rc)
+        try:
+            content = f.read()
             self.assertEquals(content, WANTED_PYPIRC)
+        finally:
+            f.close()
 
         # now let's make sure the .pypirc file generated
         # really works : we shouldn't be asked anything

Lib/distutils/tests/test_sdist.py

@@ -215,8 +215,12 @@ class SDistTestCase(PyPIRCCommandTestCase):
         self.assertEquals(len(content), 11)
 
         # checking the MANIFEST
-        manifest = open(join(self.tmp_dir, 'MANIFEST')).read()
+        f = open(join(self.tmp_dir, 'MANIFEST'))
+        try:
+            manifest = f.read()
             self.assertEquals(manifest, MANIFEST % {'sep': os.sep})
+        finally:
+            f.close()
 
     def test_metadata_check_option(self):
         # testing the `medata-check` option

Lib/distutils/tests/test_sysconfig.py

@@ -75,8 +75,10 @@ class SysconfigTestCase(support.EnvironGuard,
     def test_parse_makefile_base(self):
         self.makefile = TESTFN
         fd = open(self.makefile, 'w')
+        try:
             fd.write(r"CONFIG_ARGS=  '--arg1=optarg1' 'ENV=LIB'" '\n')
             fd.write('VAR=$OTHER\nOTHER=foo')
+        finally:
             fd.close()
         d = sysconfig.parse_makefile(self.makefile)
         self.assertEquals(d, {'CONFIG_ARGS': "'--arg1=optarg1' 'ENV=LIB'",
@@ -85,8 +87,10 @@ class SysconfigTestCase(support.EnvironGuard,
     def test_parse_makefile_literal_dollar(self):
         self.makefile = TESTFN
         fd = open(self.makefile, 'w')
+        try:
             fd.write(r"CONFIG_ARGS=  '--arg1=optarg1' 'ENV=\$$LIB'" '\n')
             fd.write('VAR=$OTHER\nOTHER=foo')
+        finally:
             fd.close()
         d = sysconfig.parse_makefile(self.makefile)
         self.assertEquals(d, {'CONFIG_ARGS': r"'--arg1=optarg1' 'ENV=\$LIB'",

Lib/distutils/tests/test_text_file.py

@@ -60,26 +60,44 @@ class TextFileTestCase(support.TempdirManager, unittest.TestCase):
 
         in_file = TextFile(filename, strip_comments=0, skip_blanks=0,
                            lstrip_ws=0, rstrip_ws=0)
+        try:
             test_input(1, "no processing", in_file, result1)
+        finally:
+            in_file.close()
 
         in_file = TextFile(filename, strip_comments=1, skip_blanks=0,
                            lstrip_ws=0, rstrip_ws=0)
+        try:
             test_input(2, "strip comments", in_file, result2)
+        finally:
+            in_file.close()
 
         in_file = TextFile(filename, strip_comments=0, skip_blanks=1,
                            lstrip_ws=0, rstrip_ws=0)
+        try:
             test_input(3, "strip blanks", in_file, result3)
+        finally:
+            in_file.close()
 
         in_file = TextFile(filename)
+        try:
             test_input(4, "default processing", in_file, result4)
+        finally:
+            in_file.close()
 
         in_file = TextFile(filename, strip_comments=1, skip_blanks=1,
                            join_lines=1, rstrip_ws=1)
+        try:
             test_input(5, "join lines without collapsing", in_file, result5)
+        finally:
+            in_file.close()
 
         in_file = TextFile(filename, strip_comments=1, skip_blanks=1,
                            join_lines=1, rstrip_ws=1, collapse_join=1)
+        try:
             test_input(6, "join lines with collapsing", in_file, result6)
+        finally:
+            in_file.close()
 
 def test_suite():
     return unittest.makeSuite(TextFileTestCase)

Lib/distutils/util.py

@@ -115,13 +115,15 @@ def get_platform ():
                 # behaviour.
                 pass
             else:
+                try:
                     m = re.search(
                             r'<key>ProductUserVisibleVersion</key>\s*' +
                             r'<string>(.*?)</string>', f.read())
-                f.close()
                     if m is not None:
                         macrelease = '.'.join(m.group(1).split('.')[:2])
                     # else: fall back to the default behaviour
+                finally:
+                    f.close()
 
         if not macver:
             macver = macrelease

Lib/sysconfig.py

@@ -680,6 +680,7 @@ def get_platform():
                 # behaviour.
                 pass
             else:
+                try:
                     m = re.search(
                             r'<key>ProductUserVisibleVersion</key>\s*' +
                             r'<string>(.*?)</string>', f.read())
@@ -687,6 +688,8 @@ def get_platform():
                     if m is not None:
                         macrelease = '.'.join(m.group(1).split('.')[:2])
                     # else: fall back to the default behaviour
+                finally:
+                    f.close()
 
         if not macver:
             macver = macrelease