Initial commit
Got map building and print_heat_map working
Added CONTRIBUTING, LICENSE, and README
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bec372b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.swp
+__pycache__
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..e635be7
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,32 @@
+# How to Contribute
+
+We would love to accept your patches and contributions to this project.
+
+## Before you begin
+
+### Sign our Contributor License Agreement
+
+Contributions to this project must be accompanied by a
+[Contributor License Agreement](https://cla.developers.google.com/about) (CLA).
+You (or your employer) retain the copyright to your contribution; this simply
+gives us permission to use and redistribute your contributions as part of the
+project.
+
+If you or your current employer have already signed the Google CLA (even if it
+was for a different project), you probably don't need to do it again.
+
+Visit <https://cla.developers.google.com/> to see your current agreements or to
+sign a new one.
+
+### Review our Community Guidelines
+
+This project follows [Google's Open Source Community
+Guidelines](https://opensource.google/conduct/).
+
+## Contribution process
+
+### Code Reviews
+
+All submissions, including submissions by project members, require review. We
+use [GitHub pull requests](https://docs.github.com/articles/about-pull-requests)
+for this purpose.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
+
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..781401e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,44 @@
+# Kernel Bug Heat Map Builder
+
+This is a tool that scans git repos, extracts bug fix information from git
+commits, and aids in the analysis and visualization of that bug fix information.
+
+This tool was orginally created for doing analysis on the Linux kernel; however,
+this tool can likely be adapted to do analysis on any git repo that includes bug
+fix information in commit messages in a sufficiently structured way.
+
+## How to use this tool
+
+1. Set your current working directory to the root of the git repo to be
+ analyzed.
+2. Build the file to bug mapping:
+ ```
+ $PATH_TO_BUG_HEAT_MAP_BUILDER/heat_map_builder.py build_map $BUG_MAP_FILE_NAME
+ ```
+ This builds the mapping between bugs and source files that subsequent
+ analysis will be based on.
+3. Analyze the information, and vizualize the results: The `heat_map_builder.py`
+ supplies additional commands to do analysis on the file to bug mapping.
+
+## Source Code Headers
+
+Every file containing source code must include copyright and license
+information. This includes any JS/CSS files that you might be serving out to
+browsers. (This is to help well-intentioned people avoid accidental copying that
+doesn't comply with the license.)
+
+Apache header:
+
+ Copyright 2022 Google LLC
+
+ 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
+
+ https://www.apache.org/licenses/LICENSE-2.0
+
+ 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.
diff --git a/git.py b/git.py
new file mode 100644
index 0000000..3fe5137
--- /dev/null
+++ b/git.py
@@ -0,0 +1,256 @@
+# Copyright 2023 Google LLC
+#
+# 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
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# 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.
+
+import hashlib
+import os
+import re
+import shutil
+import subprocess
+import tempfile
+import pathlib
+from typing import TextIO, List, Dict, Generator
+
+from absl import logging
+
+def _git_long(verb: str, *args, git_flag: str = None, cwd=None, input=None) -> TextIO:
+ logging.debug('Running\ngit %s %s\n with input: %s', verb, ' '.join(args), input)
+ command = ['git']
+ if git_flag:
+ command += [git_flag]
+ command += [verb]
+ command += list(args)
+ print(' '.join(command))
+ result = subprocess.run(command,
+ cwd=cwd, input=input,
+ text=True,
+ check = True,
+ stderr=subprocess.STDOUT,
+ stdout=subprocess.PIPE)
+ return result.stdout
+
+def _git(verb: str, *args, git_flag: str = None, cwd=None, input=None) -> str:
+ result = _git_long(verb, *args, git_flag=git_flag, cwd=cwd, input=input)
+ stdout = str(result)
+ logging.info('git %s stdout: %s', verb, stdout)
+ return stdout
+
+class CommitMessage(object):
+ def __init__(self, commit_message: str) -> None:
+ self.commit_message = commit_message
+
+class Commit(object):
+ def __init__(self, raw_commit: str) -> None:
+ self.raw_commit = raw_commit
+
+class Git(object):
+ def __init__(self, git_dir: str) -> None:
+ self._git_dir = git_dir
+
+ def __call__(self, verb: str, *args) -> str:
+ return _git(verb, *args, cwd=self._git_dir)
+
+ def clone(self, remote, *args) -> str:
+ return _git('clone', *args, '--', remote, self._git_dir)
+
+ def am(self, patch_contents: str) -> str:
+ return _git('am', cwd=self._git_dir, input=patch_contents)
+
+ def push(self, remote_branch: str) -> str:
+ return _git('push', '-u', 'origin', remote_branch, cwd=self._git_dir)
+
+ def config(self, config: str, option: str) -> str:
+ return _git('config', '--local', config, option, cwd=self._git_dir)
+
+ def commit(self, *args) -> str:
+ return _git('commit', *args, cwd=self._git_dir)
+
+ def log(self, *args) -> TextIO:
+ return _git_long('log', *args, git_flag='--no-pager', cwd=self._git_dir)
+
+ def log_no_page(self, commit_hash: str) -> CommitMessage:
+ return CommitMessage(_git('log', '-n 1', commit_hash, git_flag='--no-pager', cwd=self._git_dir))
+
+ def show(self, *args) -> Commit:
+ return Commit(_git('show', *args, git_flag='--no-pager', cwd=self._git_dir))
+
+class BugFixChecker(object):
+ def bug_fix_log_grep(self) -> str:
+ pass
+
+ def is_bug_fix(self, commit_message: CommitMessage) -> bool:
+ pass
+
+class UpstreamKernelBugFixChecker(BugFixChecker):
+ def bug_fix_log_grep(self) -> str:
+ return 'Fixes:'
+
+ def is_bug_fix(self, commit_message: CommitMessage) -> bool:
+ match = re.search('^\s*Fixes: ([0-9a-fA-F]+) \(', commit_message.commit_message, re.MULTILINE)
+ return bool(match)
+
+def find_bug_fixes(git: Git, bug_fix_checker: BugFixChecker) -> Generator[str, None, None]:
+ git_grep = '--grep=' + bug_fix_checker.bug_fix_log_grep()
+ for commit_hash in git.log(git_grep, '--pretty=format:%h').splitlines():
+ commit_message = git.log_no_page(commit_hash)
+ if bug_fix_checker.is_bug_fix(commit_message):
+ print('Found bug: ', commit_hash)
+ yield commit_hash
+
+class PathToBugListMap(object):
+ def __init__(self) -> None:
+ self._path_to_bug_list_map = {}
+
+ def add_bug_to_path(self, path: str, bug_fix_hash: str) -> None:
+ self._path_to_bug_list_map.setdefault(path, []).append(bug_fix_hash)
+
+ def add_bug_to_paths(self, path_list: List[str], bug_fix_hash: str) -> None:
+ for path in path_list:
+ self.add_bug_to_path(path, bug_fix_hash)
+
+ def serialize(self, file_name) -> None:
+ with open(file_name, 'w') as file:
+ for path, bug_fix_hash_list in self._path_to_bug_list_map.items():
+ for bug_fix_hash in bug_fix_hash_list:
+ file.write(' '.join([path, bug_fix_hash, '\n']))
+
+def path_to_bug_list_map_from_file(file_name: str) -> PathToBugListMap:
+ path_to_bug_list_map = PathToBugListMap()
+ with open(file_name, 'r') as file:
+ for line in file:
+ path, bug_fix_hash = line.split()
+ path_to_bug_list_map.add_bug_to_path(path, bug_fix_hash)
+ return path_to_bug_list_map
+
+def find_affected_files_in_commit(commit: Commit) -> List[str]:
+ results = []
+ for match in re.finditer('^diff --git a\/\S+ b\/(\S+)$', commit.raw_commit, re.MULTILINE):
+ affected_file = match.group(1)
+ print('Found file: ', affected_file)
+ if os.path.isfile(affected_file):
+ results.append(affected_file)
+ return results
+
+def build_path_to_bug_list_map(git: Git, bug_fix_checker: BugFixChecker) -> PathToBugListMap:
+ path_to_bug_lists = PathToBugListMap()
+ for commit_hash in find_bug_fixes(git, bug_fix_checker):
+ commit = git.show(commit_hash)
+ paths = find_affected_files_in_commit(commit)
+ path_to_bug_lists.add_bug_to_paths(paths, commit_hash)
+ return path_to_bug_lists
+
+def generate_path_to_bug_list(git: Git, path_to_bug_list_file: str, bug_fix_checker=UpstreamKernelBugFixChecker()) -> None:
+ path_to_bug_list_map = build_path_to_bug_list_map(git, bug_fix_checker)
+ path_to_bug_list_map.serialize(path_to_bug_list_file)
+
+class BugFixFileTreeNode(object):
+ def get_bugs_of_children(self) -> List[str]:
+ pass
+
+ def get_number_of_child_bugs(self) -> int:
+ return len(self.get_bugs_of_children())
+
+ def sort(self) -> None:
+ pass
+
+ def print(self, indent: str = '') -> None:
+ pass
+
+ def add_path_to_bug_mapping(self, path: pathlib.Path, bug_hash: str) -> None:
+ pass
+
+class BugFixFileNode(BugFixFileTreeNode):
+ def __init__(self, file_name: str, bug_list: List[str] = None) -> None:
+ self.file_name = file_name
+ self._bug_list = bug_list or []
+
+ def get_bugs_of_children(self) -> List[str]:
+ return self._bug_list
+
+ def add_path_to_bug_mapping(self, path: pathlib.Path, bug_hash: str) -> None:
+ assert os.path.basename(path) == path and path == self.file_name
+ self._bug_list.append(bug_hash)
+
+ def sort(self) -> None:
+ self._bug_list.sort()
+
+ def print(self, indent: str = '') -> None:
+ print(indent, self.file_name, ': ', str(len(self._bug_list)))
+ #indent += '\t'
+ #for bug_hash in self._bug_list:
+ # print(indent, bug_hash)
+
+class BugFixDirectoryNode(BugFixFileTreeNode):
+ def __init__(self, directory_name: str, child_directory_nodes: Dict[str, 'BugFixDirectoryNode'] = None, child_file_nodes: Dict[str, BugFixFileNode] = None) -> None:
+ self.directory_name = directory_name
+ self._child_directory_nodes = child_directory_nodes or {}
+ self._child_file_nodes = child_file_nodes or {}
+ self._child_nodes_sorted = []
+ self._number_of_child_bugs = 0
+
+ def get_bugs_of_children(self) -> List[str]:
+ results = []
+ for _, child in self._child_directory_nodes:
+ results += child.get_bugs_of_children
+ for _, child in self._child_file_nodes:
+ results += child.get_bugs_of_children
+ return results
+
+ def get_number_of_child_bugs(self) -> int:
+ return self._number_of_child_bugs
+
+ def add_path_to_bug_mapping(self, path: pathlib.Path, bug_hash: str) -> None:
+ child_name = path.parts[0]
+ if len(path.parts) > 1:
+ remaining_path = pathlib.Path(*path.parts[1:])
+ # print('Adding path: ' + str(path), ', Child name: ', child_name, ', Remaining path: ', remaining_path)
+ self._child_directory_nodes.setdefault(child_name, BugFixDirectoryNode(child_name)).add_path_to_bug_mapping(remaining_path, bug_hash)
+ # print(self._child_directory_nodes)
+ else:
+ self._child_file_nodes.setdefault(child_name, BugFixFileNode(child_name)).add_path_to_bug_mapping(child_name, bug_hash)
+
+ def sort(self) -> None:
+ #print('Keys for ', self.directory_name, ':')
+ #for part in list(self._child_directory_nodes.keys()) + list(self._child_file_nodes.keys()):
+ # print('\t', part)
+ self._child_nodes_sorted = [] + list(self._child_directory_nodes.values()) + list(self._child_file_nodes.values())
+ self._number_of_child_bugs = 0
+ for child in self._child_nodes_sorted:
+ child.sort()
+ self._number_of_child_bugs += child.get_number_of_child_bugs()
+ self._child_nodes_sorted.sort(key=lambda child: child.get_number_of_child_bugs(), reverse=True)
+
+ def print(self, indent: str = '') -> None:
+ print(indent, self.directory_name, ': ', str(self._number_of_child_bugs))
+ indent += '\t'
+ for child in self._child_nodes_sorted:
+ child.print(indent)
+
+class BugFixFileTree(object):
+ def __init__(self) -> None:
+ self._root_directory_node = BugFixDirectoryNode('')
+
+ def build_from_path_to_bug_list_map(self, path_to_bug_list_map: PathToBugListMap) -> None:
+ for path, bug_list in path_to_bug_list_map._path_to_bug_list_map.items():
+ for bug_hash in bug_list:
+ self._root_directory_node.add_path_to_bug_mapping(pathlib.Path(path), bug_hash)
+
+ def print(self) -> None:
+ self._root_directory_node.sort()
+ self._root_directory_node.print()
+
+def print_heat_map(git: Git, path_to_bug_list_file: str) -> None:
+ path_to_bug_list_map = path_to_bug_list_map_from_file(path_to_bug_list_file)
+ bug_fix_file_tree = BugFixFileTree()
+ bug_fix_file_tree.build_from_path_to_bug_list_map(path_to_bug_list_map)
+ bug_fix_file_tree.print()
diff --git a/heat_map_builder.py b/heat_map_builder.py
new file mode 100755
index 0000000..dbafe44
--- /dev/null
+++ b/heat_map_builder.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+# Copyright 2023 Google LLC
+#
+# 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
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# 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.
+
+import os.path
+import sys
+
+import git
+
+def main(argv):
+ assert os.path.exists('.git')
+ git_obj = git.Git('.git')
+ if argv[0] == 'build_map':
+ assert len(argv) > 1
+ git.generate_path_to_bug_list(git_obj, argv[1])
+ elif argv[0] == 'print_heat_map':
+ assert len(argv) > 1
+ git.print_heat_map(git_obj, argv[1])
+ else:
+ assert False
+
+if __name__ == '__main__':
+ main(sys.argv[1:])
