use open() as context manager

changelogs/fragments/9579-with-open.yml

@@ -0,0 +1,11 @@
+minor_changes:
+  - known_hosts - open file using ``open()`` as a context manager (https://github.com/ansible-collections/community.general/pull/9579).
+  - cloud_init_data_facts - open file using ``open()`` as a context manager (https://github.com/ansible-collections/community.general/pull/9579).
+  - cronvar - open file using ``open()`` as a context manager (https://github.com/ansible-collections/community.general/pull/9579).
+  - crypttab - open file using ``open()`` as a context manager (https://github.com/ansible-collections/community.general/pull/9579).
+  - parted - open file using ``open()`` as a context manager (https://github.com/ansible-collections/community.general/pull/9579).
+  - pulp_repo - open file using ``open()`` as a context manager (https://github.com/ansible-collections/community.general/pull/9579).
+  - redhat_subscription - open file using ``open()`` as a context manager (https://github.com/ansible-collections/community.general/pull/9579).
+  - solaris_zone - open file using ``open()`` as a context manager (https://github.com/ansible-collections/community.general/pull/9579).
+  - sorcery - open file using ``open()`` as a context manager (https://github.com/ansible-collections/community.general/pull/9579).
+  - timezone - open file using ``open()`` as a context manager (https://github.com/ansible-collections/community.general/pull/9579).

plugins/module_utils/known_hosts.py

@@ -103,13 +103,11 @@ def not_in_host_file(self, host):
             continue
 
         try:
-            host_fh = open(hf)
+            with open(hf) as host_fh:
+                data = host_fh.read()
         except IOError:
             hfiles_not_found += 1
             continue
-        else:
-            data = host_fh.read()
-            host_fh.close()
 
         for line in data.split("\n"):
             if line is None or " " not in line:

plugins/modules/cloud_init_data_facts.py

@@ -105,9 +105,8 @@ def gather_cloud_init_data_facts(module):
             json_file = os.path.join(CLOUD_INIT_PATH, i + '.json')
 
             if os.path.exists(json_file):
-                f = open(json_file, 'rb')
-                contents = to_text(f.read(), errors='surrogate_or_strict')
-                f.close()
+                with open(json_file, 'rb') as f:
+                    contents = to_text(f.read(), errors='surrogate_or_strict')
 
                 if contents:
                     res['cloud_init_data_facts'][i] = module.from_json(contents)

plugins/modules/cronvar.py

@@ -146,9 +146,8 @@ def read(self):
         if self.cron_file:
             # read the cronfile
             try:
-                f = open(self.cron_file, 'r')
-                self.lines = f.read().splitlines()
-                f.close()
+                with open(self.cron_file, 'r') as f:
+                    self.lines = f.read().splitlines()
             except IOError:
                 # cron file does not exist
                 return

plugins/modules/crypttab.py

@@ -154,11 +154,8 @@ def main():
             changed, reason = existing_line.opts.remove(opts)
 
     if changed and not module.check_mode:
-        try:
-            f = open(path, 'wb')
+        with open(path, 'wb') as f:
             f.write(to_bytes(crypttab, errors='surrogate_or_strict'))
-        finally:
-            f.close()
 
     module.exit_json(changed=changed, msg=reason, **module.params)
 
@@ -173,12 +170,9 @@ def __init__(self, path):
                 os.makedirs(os.path.dirname(path))
             open(path, 'a').close()
 
-        try:
-            f = open(path, 'r')
+        with open(path, 'r') as f:
             for line in f.readlines():
                 self._lines.append(Line(line))
-        finally:
-            f.close()
 
     def add(self, line):
         self._lines.append(line)

plugins/modules/parted.py

@@ -588,11 +588,8 @@ def read_record(file_path, default=None):
     Reads the first line of a file and returns it.
     """
     try:
-        f = open(file_path, 'r')
-        try:
+        with open(file_path, 'r') as f:
             return f.readline().strip()
-        finally:
-            f.close()
     except IOError:
         return default
 

plugins/modules/pulp_repo.py

@@ -583,29 +583,20 @@ def main():
     if importer_ssl_ca_cert is not None:
         importer_ssl_ca_cert_file_path = os.path.abspath(importer_ssl_ca_cert)
         if os.path.isfile(importer_ssl_ca_cert_file_path):
-            importer_ssl_ca_cert_file_object = open(importer_ssl_ca_cert_file_path, 'r')
-            try:
+            with open(importer_ssl_ca_cert_file_path, 'r') as importer_ssl_ca_cert_file_object:
                 importer_ssl_ca_cert = importer_ssl_ca_cert_file_object.read()
-            finally:
-                importer_ssl_ca_cert_file_object.close()
 
     if importer_ssl_client_cert is not None:
         importer_ssl_client_cert_file_path = os.path.abspath(importer_ssl_client_cert)
         if os.path.isfile(importer_ssl_client_cert_file_path):
-            importer_ssl_client_cert_file_object = open(importer_ssl_client_cert_file_path, 'r')
-            try:
+            with open(importer_ssl_client_cert_file_path, 'r') as importer_ssl_client_cert_file_object:
                 importer_ssl_client_cert = importer_ssl_client_cert_file_object.read()
-            finally:
-                importer_ssl_client_cert_file_object.close()
 
     if importer_ssl_client_key is not None:
         importer_ssl_client_key_file_path = os.path.abspath(importer_ssl_client_key)
         if os.path.isfile(importer_ssl_client_key_file_path):
-            importer_ssl_client_key_file_object = open(importer_ssl_client_key_file_path, 'r')
-            try:
+            with open(importer_ssl_client_key_file_path, 'r') as importer_ssl_client_key_file_object:
                 importer_ssl_client_key = importer_ssl_client_key_file_object.read()
-            finally:
-                importer_ssl_client_key_file_object.close()
 
     server = pulp_server(module, pulp_host, repo_type, wait_for_completion=wait_for_completion)
     server.set_repo_list()

plugins/modules/redhat_subscription.py

@@ -308,9 +308,8 @@ def update_plugin_conf(self, plugin, enabled=True):
             else:
                 cfg.set('main', 'enabled', '0')
 
-            fd = open(tmpfile, 'w+')
-            cfg.write(fd)
-            fd.close()
+            with open(tmpfile, 'w+') as fd:
+                cfg.write(fd)
             self.module.atomic_move(tmpfile, plugin_conf)
 
     def enable(self):

plugins/modules/solaris_zone.py

@@ -246,24 +246,22 @@ def configure_sysid(self):
 
         open('%s/root/noautoshutdown' % self.path, 'w').close()
 
-        node = open('%s/root/etc/nodename' % self.path, 'w')
-        node.write(self.name)
-        node.close()
-
-        id = open('%s/root/etc/.sysIDtool.state' % self.path, 'w')
-        id.write('1       # System previously configured?\n')
-        id.write('1       # Bootparams succeeded?\n')
-        id.write('1       # System is on a network?\n')
-        id.write('1       # Extended network information gathered?\n')
-        id.write('0       # Autobinder succeeded?\n')
-        id.write('1       # Network has subnets?\n')
-        id.write('1       # root password prompted for?\n')
-        id.write('1       # locale and term prompted for?\n')
-        id.write('1       # security policy in place\n')
-        id.write('1       # NFSv4 domain configured\n')
-        id.write('0       # Auto Registration Configured\n')
-        id.write('vt100')
-        id.close()
+        with open('%s/root/etc/nodename' % self.path, 'w') as node:
+            node.write(self.name)
+
+        with open('%s/root/etc/.sysIDtool.state' % self.path, 'w') as id:
+            id.write('1       # System previously configured?\n')
+            id.write('1       # Bootparams succeeded?\n')
+            id.write('1       # System is on a network?\n')
+            id.write('1       # Extended network information gathered?\n')
+            id.write('0       # Autobinder succeeded?\n')
+            id.write('1       # Network has subnets?\n')
+            id.write('1       # root password prompted for?\n')
+            id.write('1       # locale and term prompted for?\n')
+            id.write('1       # security policy in place\n')
+            id.write('1       # NFSv4 domain configured\n')
+            id.write('0       # Auto Registration Configured\n')
+            id.write('vt100')
 
     def configure_ssh_keys(self):
         rsa_key_file = '%s/root/etc/ssh/ssh_host_rsa_key' % self.path
@@ -284,20 +282,18 @@ def configure_ssh_keys(self):
     def configure_password(self):
         shadow = '%s/root/etc/shadow' % self.path
         if self.root_password:
-            f = open(shadow, 'r')
-            lines = f.readlines()
-            f.close()
+            with open(shadow, 'r') as f:
+                lines = f.readlines()
 
             for i in range(0, len(lines)):
                 fields = lines[i].split(':')
                 if fields[0] == 'root':
                     fields[1] = self.root_password
                     lines[i] = ':'.join(fields)
 
-            f = open(shadow, 'w')
-            for line in lines:
-                f.write(line)
-            f.close()
+            with open(shadow, 'w') as f:
+                for line in lines:
+                    f.write(line)
 
     def boot(self):
         if not self.module.check_mode:

plugins/modules/sorcery.py

@@ -460,15 +460,11 @@ def match_depends(module):
 
     if depends_new:
         try:
-            try:
-                fl = open(sorcery_depends, 'a')
-
+            with open(sorcery_depends, 'a') as fl:
                 for k in depends_new:
                     fl.write("%s:%s:%s:optional::\n" % (spell, k, depends[k]))
-            except IOError:
-                module.fail_json(msg="I/O error on the depends file")
-        finally:
-            fl.close()
+        except IOError:
+            module.fail_json(msg="I/O error on the depends file")
 
         depends_ok = False
 

plugins/modules/timezone.py

@@ -396,7 +396,8 @@ def __init__(self, module):
             self.conf_files['name'] = '/etc/sysconfig/clock'
             self.conf_files['hwclock'] = '/etc/sysconfig/clock'
             try:
-                f = open(self.conf_files['name'], 'r')
+                with open(self.conf_files['name'], 'r') as f:
+                    sysconfig_clock = f.read()
             except IOError as err:
                 if self._allow_ioerror(err, 'name'):
                     # If the config file doesn't exist detect the distribution and set regexps.
@@ -414,8 +415,6 @@ def __init__(self, module):
                 # The key for timezone might be `ZONE` or `TIMEZONE`
                 # (the former is used in RHEL/CentOS and the latter is used in SUSE linux).
                 # So check the content of /etc/sysconfig/clock and decide which key to use.
-                sysconfig_clock = f.read()
-                f.close()
                 if re.search(r'^TIMEZONE\s*=', sysconfig_clock, re.MULTILINE):
                     # For SUSE
                     self.regexps['name'] = self.dist_regexps['SuSE']
@@ -448,15 +447,13 @@ def _edit_file(self, filename, regexp, value, key):
         """
         # Read the file
         try:
-            file = open(filename, 'r')
+            with open(filename, 'r') as file:
+                lines = file.readlines()
         except IOError as err:
             if self._allow_ioerror(err, key):
                 lines = []
             else:
                 self.abort('tried to configure %s using a file "%s", but could not read it' % (key, filename))
-        else:
-            lines = file.readlines()
-            file.close()
         # Find the all matched lines
         matched_indices = []
         for i, line in enumerate(lines):
@@ -473,18 +470,17 @@ def _edit_file(self, filename, regexp, value, key):
         lines.insert(insert_line, value)
         # Write the changes
         try:
-            file = open(filename, 'w')
+            with open(filename, 'w') as file:
+                file.writelines(lines)
         except IOError:
             self.abort('tried to configure %s using a file "%s", but could not write to it' % (key, filename))
-        else:
-            file.writelines(lines)
-            file.close()
         self.msg.append('Added 1 line and deleted %s line(s) on %s' % (len(matched_indices), filename))
 
     def _get_value_from_config(self, key, phase):
         filename = self.conf_files[key]
         try:
-            file = open(filename, mode='r')
+            with open(filename, mode='r') as file:
+                status = file.read()
         except IOError as err:
             if self._allow_ioerror(err, key):
                 if key == 'hwclock':
@@ -496,8 +492,6 @@ def _get_value_from_config(self, key, phase):
             else:
                 self.abort('tried to configure %s using a file "%s", but could not read it' % (key, filename))
         else:
-            status = file.read()
-            file.close()
             try:
                 value = self.regexps[key].search(status).group(1)
             except AttributeError:
@@ -628,11 +622,11 @@ def get(self, key, phase):
         """
         if key == 'name':
             try:
-                f = open('/etc/default/init', 'r')
-                for line in f:
-                    m = re.match('^TZ=(.*)$', line.strip())
-                    if m:
-                        return m.groups()[0]
+                with open('/etc/default/init', 'r') as f:
+                    for line in f:
+                        m = re.match('^TZ=(.*)$', line.strip())
+                        if m:
+                            return m.groups()[0]
             except Exception:
                 self.module.fail_json(msg='Failed to read /etc/default/init')
         else:
@@ -811,9 +805,8 @@ def __init__(self, module):
     def __get_timezone(self):
         """ Return the current value of TZ= in /etc/environment """
         try:
-            f = open('/etc/environment', 'r')
-            etcenvironment = f.read()
-            f.close()
+            with open('/etc/environment', 'r') as f:
+                etcenvironment = f.read()
         except Exception:
             self.module.fail_json(msg='Issue reading contents of /etc/environment')
 

tests/unit/plugins/inventory/test_iocage.py

@@ -36,16 +36,14 @@ def inventory():
 
 
 def load_txt_data(path):
-    f = open(path, 'r')
-    s = f.read()
-    f.close()
+    with open(path, 'r') as f:
+        s = f.read()
     return s
 
 
 def load_yml_data(path):
-    f = open(path, 'r')
-    d = yaml.safe_load(f)
-    f.close()
+    with open(path, 'r') as f:
+        d = yaml.safe_load(f)
     return d
 
 

tests/unit/plugins/modules/test_wdc_redfish_command.py

@@ -896,15 +896,14 @@ def generate_temp_bundlefile(self,
         bundle_tarfile = tarfile.open(os.path.join(self.tempdir, tar_name), "w")
         package_filename = "oobm-{0}.pkg".format(mock_firmware_version)
         package_filename_path = os.path.join(self.tempdir, package_filename)
-        package_file = open(package_filename_path, "w")
-        package_file.close()
+        with open(package_filename_path, "w"):
+            pass
         bundle_tarfile.add(os.path.join(self.tempdir, package_filename), arcname=package_filename)
         bin_filename = "firmware.bin"
         bin_filename_path = os.path.join(self.tempdir, bin_filename)
-        bin_file = open(bin_filename_path, "wb")
-        byte_to_write = b'\x80' if is_multi_tenant else b'\xFF'
-        bin_file.write(byte_to_write * 12)
-        bin_file.close()
+        with open(bin_filename_path, "wb") as bin_file:
+            byte_to_write = b'\x80' if is_multi_tenant else b'\xFF'
+            bin_file.write(byte_to_write * 12)
         for filename in [package_filename, bin_filename]:
             bundle_tarfile.add(os.path.join(self.tempdir, filename), arcname=filename)
         bundle_tarfile.close()