bears/general: Add FileModeBear

Closes #2370

bear-languages.yaml

@@ -146,6 +146,7 @@ ESLintBear:
   - Typescript
 ElmLintBear:
   - Elm
+FileModeBear:
 FilenameBear:
 FormatRBear:
   - R

bears/general/FileModeBear.py

@@ -0,0 +1,48 @@
+import os
+import stat
+
+from coalib.bears.LocalBear import LocalBear
+from coalib.results.Result import Result
+from coalib.results.RESULT_SEVERITY import RESULT_SEVERITY
+
+
+class FileModeBear(LocalBear):
+    LANGUAGES = {'All'}
+    AUTHORS = {'The coala developers'}
+    AUTHORS_EMAILS = {'[email protected]'}
+    LICENSE = 'AGPL-3.0'
+
+    def run(self,
+            filename,
+            file,
+            filemode: str,
+            ):
+        """
+        The bear will check if the file has required permissions provided by
+        the user.
+
+        :param filemode:
+            Filemode to check, e.g. `rw`, `rwx`, etc.
+        """
+        st = os.stat(filename)
+        permissions = {'r': stat.S_IRUSR,
+                       'w': stat.S_IWUSR,
+                       'x': stat.S_IXUSR,
+                       }
+
+        invalid_chars = [ch for ch in filemode if ch not in permissions]
+
+        if invalid_chars:
+            raise ValueError('Unable to recognize character `{}` in filemode '
+                             '`{}`.'.format(''.join(invalid_chars), filemode))
+
+        mode = st.st_mode
+        for char in filemode:
+            if not mode & permissions[char]:
+                message = ('The file permissions are not adequate. '
+                           'The permissions are set to {}'
+                           .format(stat.filemode(mode)))
+                return [Result.from_values(origin=self,
+                                           message=message,
+                                           severity=RESULT_SEVERITY.INFO,
+                                           file=filename)]

tests/general/FileModeBearTest.py

@@ -0,0 +1,219 @@
+import os
+import platform
+import stat
+
+from queue import Queue
+
+from bears.general.FileModeBear import FileModeBear
+from coalib.testing.LocalBearTestHelper import LocalBearTestHelper
+from coalib.results.Result import RESULT_SEVERITY, Result
+from coalib.settings.Section import Section
+from coalib.settings.Setting import Setting
+
+
+FILE_PATH = os.path.join(os.path.dirname(__file__),
+                         'filemode_test_files', 'test_file.txt')
+
+
+class FileModeBearTest(LocalBearTestHelper):
+
+    def setUp(self):
+        self.section = Section('')
+        self.uut = FileModeBear(self.section, Queue())
+
+    def test_r_to_r_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+        self.section.append(Setting('filemode', 'r'))
+        self.check_results(
+            self.uut,
+            [],
+            [],
+            filename=FILE_PATH,
+            )
+
+    def test_w_to_w_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IWUSR)
+        self.section.append(Setting('filemode', 'w'))
+        self.check_results(
+            self.uut,
+            [],
+            [],
+            filename=FILE_PATH,
+            )
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+
+    def test_x_to_x_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IXUSR)
+        if platform.system() != 'Windows':
+            self.section.append(Setting('filemode', 'x'))
+            self.check_results(
+                self.uut,
+                [],
+                [],
+                filename=FILE_PATH,
+                )
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+
+    def test_rw_to_rw_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IRUSR | stat.S_IWUSR)
+        self.section.append(Setting('filemode', 'rw'))
+        self.check_results(
+            self.uut,
+            [],
+            [],
+            filename=FILE_PATH,
+            )
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+
+    def test_wx_to_wx_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IWUSR | stat.S_IXUSR)
+        if platform.system() != 'Windows':
+            self.section.append(Setting('filemode', 'wx'))
+            self.check_results(
+                self.uut,
+                [],
+                [],
+                filename=FILE_PATH,
+                )
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+
+    def test_rx_to_rx_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IRUSR | stat.S_IXUSR)
+        if platform.system() != 'Windows':
+            self.section.append(Setting('filemode', 'rx'))
+            self.check_results(
+                self.uut,
+                [],
+                [],
+                filename=FILE_PATH,
+                )
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+
+    def test_rwx_to_rwx_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)
+        if platform.system() != 'Windows':
+            self.section.append(Setting('filemode', 'rwx'))
+            self.check_results(
+                self.uut,
+                [],
+                [],
+                filename=FILE_PATH,
+                settings={'filemode': 'rwx'})
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+
+    def test_r_to_rwx_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+        filemode = '-r--------'
+        if platform.system() == 'Windows':
+            filemode = '-r--r--r--'
+        message = ('The file permissions are not adequate. The '
+                   'permissions are set to {}'.format(filemode))
+        self.section.append(Setting('filemode', 'rwx'))
+        self.check_results(
+            self.uut,
+            [],
+            [Result.from_values('FileModeBear',
+                                message,
+                                file=FILE_PATH,
+                                severity=RESULT_SEVERITY.INFO)],
+            filename=FILE_PATH,
+            settings={'filemode': 'rwx'})
+
+    def test_w_to_rwx_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IWUSR)
+        filemode = '--w-------'
+        if platform.system() == 'Windows':
+            filemode = '-rw-rw-rw-'
+        message = ('The file permissions are not adequate. The '
+                   'permissions are set to {}'.format(filemode))
+        self.section.append(Setting('filemode', 'rwx'))
+        self.check_results(
+            self.uut,
+            [],
+            [Result.from_values('FileModeBear',
+                                message,
+                                file=FILE_PATH,
+                                severity=RESULT_SEVERITY.INFO)],
+            filename=FILE_PATH,
+            )
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+
+    def test_x_to_rwx_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IXUSR)
+        filemode = '---x------'
+        if platform.system() != 'Windows':
+            message = ('The file permissions are not adequate. The '
+                       'permissions are set to {}'.format(filemode))
+            self.section.append(Setting('filemode', 'rwx'))
+            self.check_results(
+                self.uut,
+                [],
+                [Result.from_values('FileModeBear',
+                                    message,
+                                    file=FILE_PATH,
+                                    severity=RESULT_SEVERITY.INFO)],
+                filename=FILE_PATH,
+                )
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+
+    def test_rx_to_rwx_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IRUSR | stat.S_IXUSR)
+        filemode = '-r-x------'
+        if platform.system() != 'Windows':
+            message = ('The file permissions are not adequate. The '
+                       'permissions are set to {}'.format(filemode))
+            self.section.append(Setting('filemode', 'rwx'))
+            self.check_results(
+                self.uut,
+                [],
+                [Result.from_values('FileModeBear',
+                                    message,
+                                    file=FILE_PATH,
+                                    severity=RESULT_SEVERITY.INFO)],
+                filename=FILE_PATH,
+                )
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+
+    def test_wx_to_rwx_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IWUSR | stat.S_IXUSR)
+        filemode = '--wx------'
+        if platform.system() != 'Windows':
+            message = ('The file permissions are not adequate. The '
+                       'permissions are set to {}'.format(filemode))
+            self.section.append(Setting('filemode', 'rwx'))
+            self.check_results(
+                self.uut,
+                [],
+                [Result.from_values('FileModeBear',
+                                    message,
+                                    file=FILE_PATH,
+                                    severity=RESULT_SEVERITY.INFO)],
+                filename=FILE_PATH,
+                )
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+
+    def test_rw_to_rwx_permissions(self):
+        os.chmod(FILE_PATH, stat.S_IRUSR | stat.S_IWUSR)
+        filemode = '-rw-------'
+        if platform.system() == 'Windows':
+            filemode = '-rw-rw-rw-'
+        message = ('The file permissions are not adequate. The '
+                   'permissions are set to {}'.format(filemode))
+        self.section.append(Setting('filemode', 'rwx'))
+        self.check_results(
+            self.uut,
+            [],
+            [Result.from_values('FileModeBear',
+                                message,
+                                file=FILE_PATH,
+                                severity=RESULT_SEVERITY.INFO)],
+            filename=FILE_PATH,
+            )
+        os.chmod(FILE_PATH, stat.S_IRUSR)
+
+    def test_invalid_char_in_filemode(self):
+        self.section.append(Setting('filemode', 'rwmc'))
+        error_msg = ('ValueError: Unable to recognize '
+                     'character `mc` in filemode `rwmc`.')
+        with self.assertRaisesRegex(AssertionError, error_msg):
+            self.check_validity(self.uut, [], filename=FILE_PATH)