blob: 8857e0021379f84e425932c803296393b112a479 [file] [log] [blame]
#!/usr/bin/env python3
# Copyright The Mbed TLS Contributors
# SPDX-License-Identifier: Apache-2.0
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
This script checks the current state of the source code for minor issues,
including incorrect file permissions, presence of tabs, non-Unix line endings,
trailing whitespace, and presence of UTF-8 BOM.
Note: requires python 3, must be run from Mbed TLS root.
import os
import argparse
import logging
import codecs
import re
import subprocess
import sys
from typing import FrozenSet, Optional, Pattern # pylint: disable=unused-import
except ImportError:
class FileIssueTracker:
"""Base class for file-wide issue tracking.
To implement a checker that processes a file as a whole, inherit from
this class and implement `check_file_for_issue` and define ``heading``.
``suffix_exemptions``: files whose name ends with a string in this set
will not be checked.
``path_exemptions``: files whose path (relative to the root of the source
tree) matches this regular expression will not be checked. This can be
``None`` to match no path. Paths are normalized and converted to ``/``
separators before matching.
``heading``: human-readable description of the issue
suffix_exemptions = frozenset() #type: FrozenSet[str]
path_exemptions = None #type: Optional[Pattern[str]]
# heading must be defined in derived classes.
# pylint: disable=no-member
def __init__(self):
self.files_with_issues = {}
def normalize_path(filepath):
"""Normalize ``filepath`` with / as the directory separator."""
filepath = os.path.normpath(filepath)
# On Windows, we may have backslashes to separate directories.
# We need slashes to match exemption lists.
seps = os.path.sep
if os.path.altsep is not None:
seps += os.path.altsep
return '/'.join(filepath.split(seps))
def should_check_file(self, filepath):
"""Whether the given file name should be checked.
Files whose name ends with a string listed in ``self.suffix_exemptions``
or whose path matches ``self.path_exemptions`` will not be checked.
for files_exemption in self.suffix_exemptions:
if filepath.endswith(files_exemption):
return False
if self.path_exemptions and \
re.match(self.path_exemptions, self.normalize_path(filepath)):
return False
return True
def check_file_for_issue(self, filepath):
"""Check the specified file for the issue that this class is for.
Subclasses must implement this method.
raise NotImplementedError
def record_issue(self, filepath, line_number):
"""Record that an issue was found at the specified location."""
if filepath not in self.files_with_issues.keys():
self.files_with_issues[filepath] = []
def output_file_issues(self, logger):
"""Log all the locations where the issue was found."""
if self.files_with_issues.values():
for filename, lines in sorted(self.files_with_issues.items()):
if lines:"{}: {}".format(
filename, ", ".join(str(x) for x in lines)
class LineIssueTracker(FileIssueTracker):
"""Base class for line-by-line issue tracking.
To implement a checker that processes files line by line, inherit from
this class and implement `line_with_issue`.
# Exclude binary files.
path_exemptions = BINARY_FILE_PATH_RE
def issue_with_line(self, line, filepath):
"""Check the specified line for the issue that this class is for.
Subclasses must implement this method.
raise NotImplementedError
def check_file_line(self, filepath, line, line_number):
if self.issue_with_line(line, filepath):
self.record_issue(filepath, line_number)
def check_file_for_issue(self, filepath):
"""Check the lines of the specified file.
Subclasses must implement the ``issue_with_line`` method.
with open(filepath, "rb") as f:
for i, line in enumerate(iter(f.readline, b"")):
self.check_file_line(filepath, line, i + 1)
def is_windows_file(filepath):
_root, ext = os.path.splitext(filepath)
return ext in ('.bat', '.dsp', '.dsw', '.sln', '.vcxproj')
class PermissionIssueTracker(FileIssueTracker):
"""Track files with bad permissions.
Files that are not executable scripts must not be executable."""
heading = "Incorrect permissions:"
# .py files can be either full scripts or modules, so they may or may
# not be executable.
suffix_exemptions = frozenset({".py"})
def check_file_for_issue(self, filepath):
is_executable = os.access(filepath, os.X_OK)
should_be_executable = filepath.endswith((".sh", ".pl"))
if is_executable != should_be_executable:
self.files_with_issues[filepath] = None
class ShebangIssueTracker(FileIssueTracker):
"""Track files with a bad, missing or extraneous shebang line.
Executable scripts must start with a valid shebang (#!) line.
heading = "Invalid shebang line:"
# Allow either /bin/sh, /bin/bash, or /usr/bin/env.
# Allow at most one argument (this is a Linux limitation).
# For sh and bash, the argument if present must be options.
# For env, the argument must be the base name of the interpeter.
_shebang_re = re.compile(rb'^#! ?(?:/bin/(bash|sh)(?: -[^\n ]*)?'
rb'|/usr/bin/env ([^\n /]+))$')
_extensions = {
b'bash': 'sh',
b'perl': 'pl',
b'python3': 'py',
b'sh': 'sh',
def is_valid_shebang(self, first_line, filepath):
m = re.match(self._shebang_re, first_line)
if not m:
return False
interpreter = or
if interpreter not in self._extensions:
return False
if not filepath.endswith('.' + self._extensions[interpreter]):
return False
return True
def check_file_for_issue(self, filepath):
is_executable = os.access(filepath, os.X_OK)
with open(filepath, "rb") as f:
first_line = f.readline()
if first_line.startswith(b'#!'):
if not is_executable:
# Shebang on a non-executable file
self.files_with_issues[filepath] = None
elif not self.is_valid_shebang(first_line, filepath):
self.files_with_issues[filepath] = [1]
elif is_executable:
# Executable without a shebang
self.files_with_issues[filepath] = None
class EndOfFileNewlineIssueTracker(FileIssueTracker):
"""Track files that end with an incomplete line
(no newline character at the end of the last line)."""
heading = "Missing newline at end of file:"
path_exemptions = BINARY_FILE_PATH_RE
def check_file_for_issue(self, filepath):
with open(filepath, "rb") as f:
try:, 2)
except OSError:
# This script only works on regular files. If we can't seek
# 1 before the end, it means that this position is before
# the beginning of the file, i.e. that the file is empty.
if != b"\n":
self.files_with_issues[filepath] = None
class Utf8BomIssueTracker(FileIssueTracker):
"""Track files that start with a UTF-8 BOM.
Files should be ASCII or UTF-8. Valid UTF-8 does not start with a BOM."""
heading = "UTF-8 BOM present:"
suffix_exemptions = frozenset([".vcxproj", ".sln"])
path_exemptions = BINARY_FILE_PATH_RE
def check_file_for_issue(self, filepath):
with open(filepath, "rb") as f:
self.files_with_issues[filepath] = None
class UnixLineEndingIssueTracker(LineIssueTracker):
"""Track files with non-Unix line endings (i.e. files with CR)."""
heading = "Non-Unix line endings:"
def should_check_file(self, filepath):
if not super().should_check_file(filepath):
return False
return not is_windows_file(filepath)
def issue_with_line(self, line, _filepath):
return b"\r" in line
class WindowsLineEndingIssueTracker(LineIssueTracker):
"""Track files with non-Windows line endings (i.e. CR or LF not in CRLF)."""
heading = "Non-Windows line endings:"
def should_check_file(self, filepath):
if not super().should_check_file(filepath):
return False
return is_windows_file(filepath)
def issue_with_line(self, line, _filepath):
return not line.endswith(b"\r\n") or b"\r" in line[:-2]
class TrailingWhitespaceIssueTracker(LineIssueTracker):
"""Track lines with trailing whitespace."""
heading = "Trailing whitespace:"
suffix_exemptions = frozenset([".dsp", ".md"])
def issue_with_line(self, line, _filepath):
return line.rstrip(b"\r\n") != line.rstrip()
class TabIssueTracker(LineIssueTracker):
"""Track lines with tabs."""
heading = "Tabs present:"
suffix_exemptions = frozenset([
".pem", # some openssl dumps have tabs
def issue_with_line(self, line, _filepath):
return b"\t" in line
class MergeArtifactIssueTracker(LineIssueTracker):
"""Track lines with merge artifacts.
These are leftovers from a ``git merge`` that wasn't fully edited."""
heading = "Merge artifact:"
def issue_with_line(self, line, _filepath):
# Detect leftover git conflict markers.
if line.startswith(b'<<<<<<< ') or line.startswith(b'>>>>>>> '):
return True
if line.startswith(b'||||||| '): # from merge.conflictStyle=diff3
return True
if line.rstrip(b'\r\n') == b'=======' and \
not _filepath.endswith('.md'):
return True
return False
class IntegrityChecker:
"""Sanity-check files under the current directory."""
def __init__(self, log_file):
"""Instantiate the sanity checker.
Check files under the current directory.
Write a report of issues to log_file."""
self.logger = None
self.issues_to_check = [
def check_repo_path():
if not all(os.path.isdir(d) for d in ["include", "library", "tests"]):
raise Exception("Must be run from Mbed TLS root")
def setup_logger(self, log_file, level=logging.INFO):
self.logger = logging.getLogger()
if log_file:
handler = logging.FileHandler(log_file)
console = logging.StreamHandler()
def collect_files():
bytes_output = subprocess.check_output(['git', 'ls-files', '-z'])
bytes_filepaths = bytes_output.split(b'\0')[:-1]
ascii_filepaths = map(lambda fp: fp.decode('ascii'), bytes_filepaths)
# Prepend './' to files in the top-level directory so that
# something like `'/Makefile' in fp` matches in the top-level
# directory as well as in subdirectories.
return [fp if os.path.dirname(fp) else os.path.join(os.curdir, fp)
for fp in ascii_filepaths]
def check_files(self):
for issue_to_check in self.issues_to_check:
for filepath in self.collect_files():
if issue_to_check.should_check_file(filepath):
def output_issues(self):
integrity_return_code = 0
for issue_to_check in self.issues_to_check:
if issue_to_check.files_with_issues:
integrity_return_code = 1
return integrity_return_code
def run_main():
parser = argparse.ArgumentParser(description=__doc__)
"-l", "--log_file", type=str, help="path to optional output log",
check_args = parser.parse_args()
integrity_check = IntegrityChecker(check_args.log_file)
return_code = integrity_check.output_issues()
if __name__ == "__main__":