Fix uncaught exception on unreadable files (codespell-project#2196)

* Avoid bailing out with uncaught `PermissionError`

* Update codespell_lib/tests/test_basic.py

* FIX: Coverage

* FIX: Already short-circuited

Co-authored-by: Eric Larson <[email protected]>

Author: DimitriPapadopoulos

.github/workflows/codespell-private.yml

@@ -33,16 +33,16 @@ jobs:
         run: |
           python --version  # just to check
           pip install -U pip wheel # upgrade to latest pip find 3.5 wheels; wheel to avoid errors
-          pip install --upgrade codecov chardet "setuptools!=47.2.0" docutils setuptools_scm[toml]
+          pip install --upgrade chardet "setuptools!=47.2.0" docutils setuptools_scm[toml]
           pip install aspell-python-py3
           pip install -e ".[dev]" # install the codespell dev packages
       - run: codespell --help
       - run: codespell --version
       - run: make check
+      - uses: codecov/codecov-action@v3
       - run: codespell --check-filenames --skip="./.git/*,*.pyc,./codespell_lib/tests/test_basic.py,./codespell_lib/data/*,./example/code.c,./build/lib/codespell_lib/tests/test_basic.py,./build/lib/codespell_lib/data/*,README.rst,*.egg-info/*"
       # this file has an error
       - run: "! codespell codespell_lib/tests/test_basic.py"
-      - run: codecov
 
   make-check-dictionaries:
     runs-on: ubuntu-latest

.gitignore

@@ -9,3 +9,5 @@ codespell.egg-info
 .mypy_cache/
 .pytest_cache/
 codespell_lib/_version.py
+junit-results.xml
+*.egg-info/

codespell_lib/_codespell.py

@@ -647,14 +647,22 @@ def parse_file(filename, colors, summary, misspellings, exclude_lines,
         if not os.path.isfile(filename):
             return bad_count
 
-        text = is_text_file(filename)
+        try:
+            text = is_text_file(filename)
+        except PermissionError as e:
+            print("WARNING: %s: %s" % (e.strerror, filename),
+                  file=sys.stderr)
+            return bad_count
+        except OSError:
+            return bad_count
+
         if not text:
             if not options.quiet_level & QuietLevels.BINARY_FILE:
                 print("WARNING: Binary file: %s" % filename, file=sys.stderr)
             return bad_count
         try:
             lines, encoding = file_opener.open(filename)
-        except Exception:
+        except OSError:
             return bad_count
 
     for i, line in enumerate(lines):

codespell_lib/tests/test_basic.py

@@ -122,6 +122,20 @@ def test_basic(tmpdir, capsys):
     assert cs.main(d) == 0
 
 
+@pytest.mark.skipif(
+    not sys.platform == 'linux', reason='Only supported on Linux')
+def test_permission_error(tmp_path, capsys):
+    """Test permission error handling."""
+    d = tmp_path
+    with open(d / 'unreadable.txt', 'w') as f:
+        f.write('abandonned\n')
+    code, _, stderr = cs.main(f.name, std=True)
+    assert 'WARNING:' not in stderr
+    os.chmod(f.name, 0o000)
+    code, _, stderr = cs.main(f.name, std=True)
+    assert 'WARNING:' in stderr
+
+
 def test_interactivity(tmpdir, capsys):
     """Test interaction"""
     # Windows can't read a currently-opened file, so here we use

setup.cfg

@@ -1,5 +1,5 @@
 [tool:pytest]
-addopts = --cov=codespell_lib -rs --cov-report= --tb=short
+addopts = --cov=codespell_lib -rs --cov-report= --tb=short --junit-xml=junit-results.xml
 
 [flake8]
 exclude = build, ci-helpers