Merge remote-tracking branch 'origin/main' into pg/pip_package

Handling GitHub API Rate Limit Exceeded Exception

.gitignore

@@ -1,4 +1,6 @@
 .idea/
 venv/
 pr_agent/settings/.secrets.toml
-__pycache__
+__pycache__
+dist/
+*.egg-info/

.gitlab-ci.yml

@@ -1,11 +0,0 @@
-bot-review:
-  stage: test
-  variables:
-    MR_URL: ${CI_MERGE_REQUEST_PROJECT_URL}/-/merge_requests/${CI_MERGE_REQUEST_IID}
-  image: docker:latest
-  services:
-    - docker:19-dind
-  script:
-    - docker run --rm -e OPENAI.KEY=${OPEN_API_KEY} -e OPENAI.ORG=${OPEN_API_ORG} -e GITLAB.PERSONAL_ACCESS_TOKEN=${GITLAB_PAT} -e CONFIG.GIT_PROVIDER=gitlab codiumai/pr-agent --pr_url ${MR_URL} describe
-  rules:
-    - if: $CI_COMMIT_BRANCH != $CI_DEFAULT_BRANCH

CHANGELOG.md

@@ -0,0 +1,6 @@
+## 2023-07-26
+
+### Added
+- New feature for updating the CHANGELOG.md based on the contents of a PR.
+- Added support for this feature for the Github provider.
+- New configuration settings and prompts for the changelog update feature.

Dockerfile.github_action

@@ -1,8 +1,8 @@
 FROM python:3.10 as base
 
 WORKDIR /app
-ADD requirements.txt .
-RUN pip install -r requirements.txt && rm requirements.txt
+ADD pyproject.toml .
+RUN pip install . && rm pyproject.toml
 ENV PYTHONPATH=/app
 ADD pr_agent pr_agent
 ADD github_action/entrypoint.sh /

README.md

@@ -66,6 +66,7 @@ CodiumAI `PR-Agent` is an open-source tool aiming to help developers review pull
 - [Usage and tools](#usage-and-tools)
 - [Configuration](./CONFIGURATION.md)
 - [How it works](#how-it-works)
+- [Why use PR-Agent](#why-use-pr-agent)
 - [Roadmap](#roadmap)
 - [Similar projects](#similar-projects)
 </div>
@@ -81,8 +82,10 @@ CodiumAI `PR-Agent` is an open-source tool aiming to help developers review pull
 |       | Auto-Description                            |   :white_check_mark:    |  :white_check_mark:      |           |
 |       | Improve Code                                |   :white_check_mark:    |   :white_check_mark:    |           |
 |       | Reflect and Review                          |   :white_check_mark:    |                         |           |
+|       | Update CHANGELOG.md                         |   :white_check_mark:    |                         |           |
 |       |                                             |        |        |           |
 | USAGE | CLI                                         |   :white_check_mark:    |   :white_check_mark:    |   :white_check_mark:       |
+|       | App / webhook                               |   :white_check_mark:    |   :white_check_mark:    |           |
 |       | Tagging bot                                 |   :white_check_mark:    |        |           |
 |       | Actions                                     |   :white_check_mark:    |        |           |
 |       |                                             |        |        |           |
@@ -97,6 +100,7 @@ Examples for invoking the different tools via the CLI:
 - **Improve**:      python cli.py --pr-url=<pr_url>  improve
 - **Ask**:          python cli.py --pr-url=<pr_url>  ask "Write me a poem about this PR"
 - **Reflect**:      python cli.py --pr-url=<pr_url>  reflect
+- **Update changelog**:      python cli.py --pr-url=<pr_url>  update_changelog
 
 "<pr_url>" is the url of the relevant PR (for example: https://github.com/Codium-ai/pr-agent/pull/50).
 
@@ -145,6 +149,19 @@ There are several ways to use PR-Agent:
 
 Check out the [PR Compression strategy](./PR_COMPRESSION.md) page for more details on how we convert a code diff to a manageable LLM prompt
 
+## Why use PR-Agent?
+
+A reasonable question that can be asked is: `"Why use PR-Agent? What make it stand out from existing tools?"`
+
+Here are some of the reasons why:
+
+- We emphasize **real-life practical usage**. Each tool (review, improve, ask, ...) has a single GPT-4 call, no more. We feel that this is critical for realistic team usage - obtaining an answer quickly (~30 seconds) and affordably.
+- Our [PR Compression strategy](./PR_COMPRESSION.md)  is a core ability that enables to effectively tackle both short and long PRs.
+- Our JSON prompting strategy enables to have **modular, customizable tools**. For example, the '/review' tool categories can be controlled via the configuration file. Adding additional categories is easy and accessible.
+- We support **multiple git providers** (GitHub, Gitlab, Bitbucket), and multiple ways to use the tool (CLI, GitHub Action, Docker, ...).
+- We are open-source, and welcome contributions from the community.
+
+
 ## Roadmap
 
 - [ ] Support open-source models, as a replacement for OpenAI models. (Note - a minimal requirement for each open-source model is to have 8k+ context, and good support for generating JSON as an output)

docker/Dockerfile

@@ -1,8 +1,8 @@
 FROM python:3.10 as base
 
 WORKDIR /app
-ADD requirements.txt .
-RUN pip install -r requirements.txt && rm requirements.txt
+ADD pyproject.toml .
+RUN pip install . && rm pyproject.toml
 ENV PYTHONPATH=/app
 ADD pr_agent pr_agent
 

docker/Dockerfile.lambda

@@ -4,9 +4,9 @@ RUN yum update -y && \
     yum install -y gcc python3-devel && \
     yum clean all
 
-ADD requirements.txt .
-RUN pip install -r requirements.txt && rm requirements.txt
-RUN pip install mangum==16.0.0
+ADD pyproject.toml .
+RUN pip install . && rm pyproject.toml
+RUN pip install mangum==0.17.0
 COPY pr_agent/ ${LAMBDA_TASK_ROOT}/pr_agent/
 
 CMD ["pr_agent.servers.serverless.serverless"]

pr_agent/agent/pr_agent.py

@@ -6,6 +6,7 @@ from pr_agent.tools.pr_description import PRDescription
 from pr_agent.tools.pr_information_from_user import PRInformationFromUser
 from pr_agent.tools.pr_questions import PRQuestions
 from pr_agent.tools.pr_reviewer import PRReviewer
+from pr_agent.tools.pr_update_changelog import PRUpdateChangelog
 
 
 class PRAgent:
@@ -26,7 +27,9 @@ class PRAgent:
         elif any(cmd == action for cmd in ["/improve", "/improve_code"]):
             await PRCodeSuggestions(pr_url).suggest()
         elif any(cmd == action for cmd in ["/ask", "/ask_question"]):
-            await PRQuestions(pr_url, args).answer()
+            await PRQuestions(pr_url, args=args).answer()
+        elif any(cmd == action for cmd in ["/update_changelog"]):
+            await PRUpdateChangelog(pr_url, args=args).update_changelog()
         else:
             return False
 

pr_agent/algo/language_handler.py

@@ -13,7 +13,7 @@ if settings.config.use_extra_bad_extensions:
 
 
 def filter_bad_extensions(files):
-    return [f for f in files if is_valid_file(f.filename)]
+    return [f for f in files if f.filename is not None and is_valid_file(f.filename)]
 
 
 def is_valid_file(filename):

pr_agent/algo/pr_processing.py

@@ -3,6 +3,8 @@ from __future__ import annotations
 import logging
 from typing import Tuple, Union, Callable, List
 
+from github import RateLimitExceededException
+
 from pr_agent.algo import MAX_TOKENS
 from pr_agent.algo.git_patch_processing import convert_to_hunks_with_lines_numbers, extend_patch, handle_patch_deletions
 from pr_agent.algo.language_handler import sort_files_by_main_languages
@@ -19,7 +21,6 @@ OUTPUT_BUFFER_TOKENS_SOFT_THRESHOLD = 1000
 OUTPUT_BUFFER_TOKENS_HARD_THRESHOLD = 600
 PATCH_EXTRA_LINES = 3
 
-
 def get_pr_diff(git_provider: GitProvider, token_handler: TokenHandler, model: str,
                 add_line_numbers_to_hunks: bool = False, disable_extra_lines: bool = False) -> str:
     """
@@ -40,7 +41,11 @@ def get_pr_diff(git_provider: GitProvider, token_handler: TokenHandler, model: s
         global PATCH_EXTRA_LINES
         PATCH_EXTRA_LINES = 0
 
-    diff_files = list(git_provider.get_diff_files())
+    try:
+        diff_files = list(git_provider.get_diff_files())
+    except RateLimitExceededException as e:
+        logging.error(f"Rate limit exceeded for git provider API. original message {e}")
+        raise
 
     # get pr languages
     pr_languages = sort_files_by_main_languages(git_provider.get_languages(), diff_files)
@@ -55,7 +60,7 @@ def get_pr_diff(git_provider: GitProvider, token_handler: TokenHandler, model: s
 
     # if we are over the limit, start pruning
     patches_compressed, modified_file_names, deleted_file_names = \
-        pr_generate_compressed_diff(pr_languages, token_handler, add_line_numbers_to_hunks)
+        pr_generate_compressed_diff(pr_languages, token_handler, model, add_line_numbers_to_hunks)
 
     final_diff = "\n".join(patches_compressed)
     if modified_file_names:

pr_agent/cli.py

@@ -8,6 +8,7 @@ from pr_agent.tools.pr_description import PRDescription
 from pr_agent.tools.pr_information_from_user import PRInformationFromUser
 from pr_agent.tools.pr_questions import PRQuestions
 from pr_agent.tools.pr_reviewer import PRReviewer
+from pr_agent.tools.pr_update_changelog import PRUpdateChangelog
 
 
 def run(args=None):
@@ -27,13 +28,15 @@ ask / ask_question [question] - Ask a question about the PR.
 describe / describe_pr - Modify the PR title and description based on the PR's contents.
 improve / improve_code - Suggest improvements to the code in the PR as pull request comments ready to commit.
 reflect - Ask the PR author questions about the PR.
+update_changelog - Update the changelog based on the PR's contents.
 """)
     parser.add_argument('--pr_url', type=str, help='The URL of the PR to review', required=True)
     parser.add_argument('command', type=str, help='The', choices=['review', 'review_pr',
                                                                   'ask', 'ask_question',
                                                                   'describe', 'describe_pr',
                                                                   'improve', 'improve_code',
-                                                                  'reflect', 'review_after_reflect'],
+                                                                  'reflect', 'review_after_reflect',
+                                                                   'update_changelog'],
                                                                    default='review')
     parser.add_argument('rest', nargs=argparse.REMAINDER, default=[])
     args = parser.parse_args(args)
@@ -49,7 +52,8 @@ reflect - Ask the PR author questions about the PR.
         'review': _handle_review_command,
         'review_pr': _handle_review_command,
         'reflect': _handle_reflect_command,
-        'review_after_reflect': _handle_review_after_reflect_command
+        'review_after_reflect': _handle_review_after_reflect_command,
+        'update_changelog': _handle_update_changelog,
     }
     if command in commands:
         commands[command](args.pr_url, args.rest)
@@ -96,6 +100,10 @@ def _handle_review_after_reflect_command(pr_url: str, rest: list):
     reviewer = PRReviewer(pr_url, cli_mode=True, is_answer=True)
     asyncio.run(reviewer.review())
 
+def _handle_update_changelog(pr_url: str, rest: list):
+    print(f"Updating changlog for: {pr_url}")
+    reviewer = PRUpdateChangelog(pr_url, cli_mode=True, args=rest)
+    asyncio.run(reviewer.update_changelog())
 
 if __name__ == '__main__':
     run()

pr_agent/config_loader.py

@@ -1,7 +1,11 @@
 from os.path import abspath, dirname, join
+from pathlib import Path
+from typing import Optional
 
 from dynaconf import Dynaconf
 
+PR_AGENT_TOML_KEY = 'pr-agent'
+
 current_dir = dirname(abspath(__file__))
 settings = Dynaconf(
     envvar_prefix=False,
@@ -15,6 +19,36 @@ settings = Dynaconf(
          "settings/pr_description_prompts.toml",
          "settings/pr_code_suggestions_prompts.toml",
          "settings/pr_information_from_user_prompts.toml",
+         "settings/pr_update_changelog.toml",
          "settings_prod/.secrets.toml"
         ]]
 )
+
+
+# Add local configuration from pyproject.toml of the project being reviewed
+def _find_repository_root() -> Path:
+    """
+    Identify project root directory by recursively searching for the .git directory in the parent directories.
+    """
+    cwd = Path.cwd().resolve()
+    no_way_up = False
+    while not no_way_up:
+        no_way_up = cwd == cwd.parent
+        if (cwd / ".git").is_dir():
+            return cwd
+        cwd = cwd.parent
+    return None
+
+def _find_pyproject() -> Optional[Path]:
+    """
+    Search for file pyproject.toml in the repository root.
+    """
+    repo_root = _find_repository_root()
+    if repo_root:
+        pyproject = _find_repository_root() / "pyproject.toml"
+        return pyproject if pyproject.is_file() else None
+    return None
+
+pyproject_path = _find_pyproject()
+if pyproject_path is not None:
+    settings.load_file(pyproject_path, env=f'tool.{PR_AGENT_TOML_KEY}')

pr_agent/git_providers/__init__.py

@@ -2,11 +2,13 @@ from pr_agent.config_loader import settings
 from pr_agent.git_providers.bitbucket_provider import BitbucketProvider
 from pr_agent.git_providers.github_provider import GithubProvider
 from pr_agent.git_providers.gitlab_provider import GitLabProvider
+from pr_agent.git_providers.local_git_provider import LocalGitProvider
 
 _GIT_PROVIDERS = {
     'github': GithubProvider,
     'gitlab': GitLabProvider,
     'bitbucket': BitbucketProvider,
+    'local' : LocalGitProvider
 }
 
 def get_git_provider():

pr_agent/git_providers/bitbucket_provider.py

@@ -27,7 +27,7 @@ class BitbucketProvider:
             self.set_pr(pr_url)
 
     def is_supported(self, capability: str) -> bool:
-        if capability in ['get_issue_comments', 'create_inline_comment', 'publish_inline_comments']:
+        if capability in ['get_issue_comments', 'create_inline_comment', 'publish_inline_comments', 'get_labels']:
             return False
         return True
 

pr_agent/git_providers/git_provider.py

@@ -60,6 +60,10 @@ class GitProvider(ABC):
     def publish_labels(self, labels):
         pass
 
+    @abstractmethod
+    def get_labels(self):
+        pass
+
     @abstractmethod
     def remove_initial_comment(self):
         pass
@@ -132,3 +136,4 @@ class IncrementalPR:
         self.commits_range = None
         self.first_new_commit_sha = None
         self.last_seen_commit_sha = None
+

pr_agent/git_providers/github_provider.py

@@ -3,13 +3,15 @@ from datetime import datetime
 from typing import Optional, Tuple
 from urllib.parse import urlparse
 
-from github import AppAuthentication, Github, Auth
+from github import AppAuthentication, Auth, Github, GithubException
+from retry import retry
 
 from pr_agent.config_loader import settings
 
-from .git_provider import FilePatchInfo, GitProvider, IncrementalPR
 from ..algo.language_handler import is_valid_file
 from ..algo.utils import load_large_diff
+from .git_provider import FilePatchInfo, GitProvider, IncrementalPR
+from ..servers.utils import RateLimitExceeded
 
 
 class GithubProvider(GitProvider):
@@ -78,27 +80,34 @@ class GithubProvider(GitProvider):
             return self.file_set.values()
         return self.pr.get_files()
 
+    @retry(exceptions=RateLimitExceeded,
+           tries=settings.github.ratelimit_retries, delay=2, backoff=2, jitter=(1, 3))
     def get_diff_files(self) -> list[FilePatchInfo]:
-        files = self.get_files()
-        diff_files = []
-        for file in files:
-            if is_valid_file(file.filename):
-                new_file_content_str = self._get_pr_file_content(file, self.pr.head.sha)
-                patch = file.patch
-                if self.incremental.is_incremental and self.file_set:
-                    original_file_content_str = self._get_pr_file_content(file, self.incremental.last_seen_commit_sha)
-                    patch = load_large_diff(file,
-                                            new_file_content_str,
-                                            original_file_content_str,
-                                             None)
-                    self.file_set[file.filename] = patch
-                else:
-                    original_file_content_str = self._get_pr_file_content(file, self.pr.base.sha)
+        try:
+            files = self.get_files()
+            diff_files = []
+            for file in files:
+                if is_valid_file(file.filename):
+                    new_file_content_str = self._get_pr_file_content(file, self.pr.head.sha)
+                    patch = file.patch
+                    if self.incremental.is_incremental and self.file_set:
+                        original_file_content_str = self._get_pr_file_content(file,
+                                                                              self.incremental.last_seen_commit_sha)
+                        patch = load_large_diff(file,
+                                                new_file_content_str,
+                                                original_file_content_str,
+                                                None)
+                        self.file_set[file.filename] = patch
+                    else:
+                        original_file_content_str = self._get_pr_file_content(file, self.pr.base.sha)
 
-                diff_files.append(
-                    FilePatchInfo(original_file_content_str, new_file_content_str, patch, file.filename))
-        self.diff_files = diff_files
-        return diff_files
+                    diff_files.append(
+                        FilePatchInfo(original_file_content_str, new_file_content_str, patch, file.filename))
+            self.diff_files = diff_files
+            return diff_files
+        except GithubException.RateLimitExceededException as e:
+            logging.error(f"Rate limit exceeded for GitHub API. Original message: {e}")
+            raise RateLimitExceeded("Rate limit exceeded for GitHub API.") from e
 
     def publish_description(self, pr_title: str, pr_body: str):
         self.pr.edit(title=pr_title, body=pr_body)
@@ -322,5 +331,12 @@ class GithubProvider(GitProvider):
             headers, data = self.pr._requester.requestJsonAndCheck(
                 "PUT", f"{self.pr.issue_url}/labels", input=post_parameters
             )
-        except:
-            logging.exception("Failed to publish labels")
+        except Exception as e:
+            logging.exception(f"Failed to publish labels, error: {e}")
+
+    def get_labels(self):
+        try:
+            return [label.name for label in self.pr.labels]
+        except Exception as e:
+            logging.exception(f"Failed to get labels, error: {e}")
+            return []

pr_agent/git_providers/gitlab_provider.py

@@ -8,11 +8,12 @@ from gitlab import GitlabGetError
 
 from pr_agent.config_loader import settings
 
-from .git_provider import EDIT_TYPE, FilePatchInfo, GitProvider
 from ..algo.language_handler import is_valid_file
+from .git_provider import EDIT_TYPE, FilePatchInfo, GitProvider
 
 
 class GitLabProvider(GitProvider):
+
     def __init__(self, merge_request_url: Optional[str] = None, incremental: Optional[bool] = False):
         gitlab_url = settings.get("GITLAB.URL", None)
         if not gitlab_url:
@@ -21,8 +22,8 @@ class GitLabProvider(GitProvider):
         if not gitlab_access_token:
             raise ValueError("GitLab personal access token is not set in the config file")
         self.gl = gitlab.Gitlab(
-            gitlab_url,
-            gitlab_access_token
+            url=gitlab_url,
+            oauth_token=gitlab_access_token
         )
         self.id_project = None
         self.id_mr = None
@@ -112,7 +113,7 @@ class GitLabProvider(GitProvider):
     def create_inline_comment(self, body: str, relevant_file: str, relevant_line_in_file: str):
         raise NotImplementedError("Gitlab provider does not support creating inline comments yet")
 
-    def create_inline_comment(self, comments: list[dict]):
+    def create_inline_comments(self, comments: list[dict]):
         raise NotImplementedError("Gitlab provider does not support publishing inline comments yet")
 
     def send_inline_comment(self, body, edit_type, found, relevant_file, relevant_line_in_file, source_line_no,
@@ -236,20 +237,30 @@ class GitLabProvider(GitProvider):
     def get_issue_comments(self):
         raise NotImplementedError("GitLab provider does not support issue comments yet")
 
-    def _parse_merge_request_url(self, merge_request_url: str) -> Tuple[int, int]:
+    def _parse_merge_request_url(self, merge_request_url: str) -> Tuple[str, int]:
         parsed_url = urlparse(merge_request_url)
 
         path_parts = parsed_url.path.strip('/').split('/')
-        if path_parts[-2] != 'merge_requests':
+        if 'merge_requests' not in path_parts:
             raise ValueError("The provided URL does not appear to be a GitLab merge request URL")
 
+        mr_index = path_parts.index('merge_requests')
+        # Ensure there is an ID after 'merge_requests'
+        if len(path_parts) <= mr_index + 1:
+            raise ValueError("The provided URL does not contain a merge request ID")
+
         try:
-            mr_id = int(path_parts[-1])
+            mr_id = int(path_parts[mr_index + 1])
         except ValueError as e:
             raise ValueError("Unable to convert merge request ID to integer") from e
 
-        # Gitlab supports access by both project numeric ID as well as 'namespace/project_name'
-        return "/".join(path_parts[:2]), mr_id
+        # Handle special delimiter (-)
+        project_path = "/".join(path_parts[:mr_index])
+        if project_path.endswith('/-'):
+            project_path = project_path[:-2]
+
+        # Return the path before 'merge_requests' and the ID
+        return project_path, mr_id
 
     def _get_merge_request(self):
         mr = self.gl.projects.get(self.id_project).mergerequests.get(self.id_mr)
@@ -258,8 +269,15 @@ class GitLabProvider(GitProvider):
     def get_user_id(self):
         return None
 
-    def publish_labels(self, labels):
-        pass
+    def publish_labels(self, pr_types):
+        try:
+            self.mr.labels = list(set(pr_types))
+            self.mr.save()
+        except Exception as e:
+            logging.exception(f"Failed to publish labels, error: {e}")
 
     def publish_inline_comments(self, comments: list[dict]):
-        pass
+        pass
+
+    def get_labels(self):
+        return self.mr.labels

pr_agent/git_providers/local_git_provider.py

@@ -0,0 +1,178 @@
+import logging
+from collections import Counter
+from pathlib import Path
+from typing import List
+
+from git import Repo
+
+from pr_agent.config_loader import _find_repository_root, settings
+from pr_agent.git_providers.git_provider import EDIT_TYPE, FilePatchInfo, GitProvider
+
+
+class PullRequestMimic:
+    """
+    This class mimics the PullRequest class from the PyGithub library for the LocalGitProvider.
+    """
+
+    def __init__(self, title: str, diff_files: List[FilePatchInfo]):
+        self.title = title
+        self.diff_files = diff_files
+
+
+class LocalGitProvider(GitProvider):
+    """
+    This class implements the GitProvider interface for local git repositories.
+    It mimics the PR functionality of the GitProvider interface,
+    but does not require a hosted git repository.
+    Instead of providing a PR url, the user provides a local branch path to generate a diff-patch.
+    For the MVP it only supports the /review and /describe capabilities.
+    """
+
+    def __init__(self, target_branch_name, incremental=False):
+        self.repo_path = _find_repository_root()
+        if self.repo_path is None:
+            raise ValueError('Could not find repository root')
+        self.repo = Repo(self.repo_path)
+        self.head_branch_name = self.repo.head.ref.name
+        self.target_branch_name = target_branch_name
+        self._prepare_repo()
+        self.diff_files = None
+        self.pr = PullRequestMimic(self.get_pr_title(), self.get_diff_files())
+        self.description_path = settings.get('local.description_path') \
+            if settings.get('local.description_path') is not None else self.repo_path / 'description.md'
+        self.review_path = settings.get('local.review_path') \
+            if settings.get('local.review_path') is not None else self.repo_path / 'review.md'
+        # inline code comments are not supported for local git repositories
+        settings.pr_reviewer.inline_code_comments = False
+
+    def _prepare_repo(self):
+        """
+        Prepare the repository for PR-mimic generation.
+        """
+        logging.debug('Preparing repository for PR-mimic generation...')
+        if self.repo.is_dirty():
+            raise ValueError('The repository is not in a clean state. Please commit or stash pending changes.')
+        if self.target_branch_name not in self.repo.heads:
+            raise KeyError(f'Branch: {self.target_branch_name} does not exist')
+
+    def is_supported(self, capability: str) -> bool:
+        if capability in ['get_issue_comments', 'create_inline_comment', 'publish_inline_comments', 'get_labels']:
+            return False
+        return True
+
+    def get_diff_files(self) -> list[FilePatchInfo]:
+        diffs = self.repo.head.commit.diff(
+            self.repo.merge_base(self.repo.head, self.repo.branches[self.target_branch_name]),
+            create_patch=True,
+            R=True
+        )
+        diff_files = []
+        for diff_item in diffs:
+            if diff_item.a_blob is not None:
+                original_file_content_str = diff_item.a_blob.data_stream.read().decode('utf-8')
+            else:
+                original_file_content_str = ""  # empty file
+            if diff_item.b_blob is not None:
+                new_file_content_str = diff_item.b_blob.data_stream.read().decode('utf-8')
+            else:
+                new_file_content_str = ""  # empty file
+            edit_type = EDIT_TYPE.MODIFIED
+            if diff_item.new_file:
+                edit_type = EDIT_TYPE.ADDED
+            elif diff_item.deleted_file:
+                edit_type = EDIT_TYPE.DELETED
+            elif diff_item.renamed_file:
+                edit_type = EDIT_TYPE.RENAMED
+            diff_files.append(
+                FilePatchInfo(original_file_content_str,
+                              new_file_content_str,
+                              diff_item.diff.decode('utf-8'),
+                              diff_item.b_path,
+                              edit_type=edit_type,
+                              old_filename=None if diff_item.a_path == diff_item.b_path else diff_item.a_path
+                              )
+            )
+        self.diff_files = diff_files
+        return diff_files
+
+    def get_files(self) -> List[str]:
+        """
+        Returns a list of files with changes in the diff.
+        """
+        diff_index = self.repo.head.commit.diff(
+            self.repo.merge_base(self.repo.head, self.repo.branches[self.target_branch_name]),
+            R=True
+        )
+        # Get the list of changed files
+        diff_files = [item.a_path for item in diff_index]
+        return diff_files
+
+    def publish_description(self, pr_title: str, pr_body: str):
+        with open(self.description_path, "w") as file:
+            # Write the string to the file
+            file.write(pr_title + '\n' + pr_body)
+
+    def publish_comment(self, pr_comment: str, is_temporary: bool = False):
+        with open(self.review_path, "w") as file:
+            # Write the string to the file
+            file.write(pr_comment)
+
+    def publish_inline_comment(self, body: str, relevant_file: str, relevant_line_in_file: str):
+        raise NotImplementedError('Publishing inline comments is not implemented for the local git provider')
+
+    def create_inline_comment(self, body: str, relevant_file: str, relevant_line_in_file: str):
+        raise NotImplementedError('Creating inline comments is not implemented for the local git provider')
+
+    def publish_inline_comments(self, comments: list[dict]):
+        raise NotImplementedError('Publishing inline comments is not implemented for the local git provider')
+
+    def publish_code_suggestion(self, body: str, relevant_file: str,
+                                relevant_lines_start: int, relevant_lines_end: int):
+        raise NotImplementedError('Publishing code suggestions is not implemented for the local git provider')
+
+    def publish_code_suggestions(self, code_suggestions: list):
+        raise NotImplementedError('Publishing code suggestions is not implemented for the local git provider')
+
+    def publish_labels(self, labels):
+        pass  # Not applicable to the local git provider, but required by the interface
+
+    def remove_initial_comment(self):
+        pass  # Not applicable to the local git provider, but required by the interface
+
+    def get_languages(self):
+        """
+        Calculate percentage of languages in repository. Used for hunk prioritisation.
+        """
+        # Get all files in repository
+        filepaths = [Path(item.path) for item in self.repo.tree().traverse() if item.type == 'blob']
+        # Identify language by file extension and count
+        lang_count = Counter(ext.lstrip('.') for filepath in filepaths for ext in [filepath.suffix.lower()])
+        # Convert counts to percentages
+        total_files = len(filepaths)
+        lang_percentage = {lang: count / total_files * 100 for lang, count in lang_count.items()}
+        return lang_percentage
+
+    def get_pr_branch(self):
+        return self.repo.head
+
+    def get_user_id(self):
+        return -1  # Not used anywhere for the local provider, but required by the interface
+
+    def get_pr_description(self):
+        commits_diff = list(self.repo.iter_commits(self.target_branch_name + '..HEAD'))
+        # Get the commit messages and concatenate
+        commit_messages = " ".join([commit.message for commit in commits_diff])
+        # TODO Handle the description better - maybe use gpt-3.5 summarisation here?
+        return commit_messages[:200]  # Use max 200 characters
+
+    def get_pr_title(self):
+        """
+        Substitutes the branch-name as the PR-mimic title.
+        """
+        return self.head_branch_name
+
+    def get_issue_comments(self):
+        raise NotImplementedError('Getting issue comments is not implemented for the local git provider')
+
+    def get_labels(self):
+        raise NotImplementedError('Getting labels is not implemented for the local git provider')

pr_agent/servers/github_action_runner.py

@@ -8,50 +8,61 @@ from pr_agent.tools.pr_reviewer import PRReviewer
 
 
 async def run_action():
-    GITHUB_EVENT_NAME = os.environ.get('GITHUB_EVENT_NAME', None)
+    # Get environment variables
+    GITHUB_EVENT_NAME = os.environ.get('GITHUB_EVENT_NAME')
+    GITHUB_EVENT_PATH = os.environ.get('GITHUB_EVENT_PATH')
+    OPENAI_KEY = os.environ.get('OPENAI_KEY')
+    OPENAI_ORG = os.environ.get('OPENAI_ORG')
+    GITHUB_TOKEN = os.environ.get('GITHUB_TOKEN')
+
+    # Check if required environment variables are set
     if not GITHUB_EVENT_NAME:
         print("GITHUB_EVENT_NAME not set")
         return
-    GITHUB_EVENT_PATH = os.environ.get('GITHUB_EVENT_PATH', None)
     if not GITHUB_EVENT_PATH:
         print("GITHUB_EVENT_PATH not set")
         return
-    try:
-        event_payload = json.load(open(GITHUB_EVENT_PATH, 'r'))
-    except json.decoder.JSONDecodeError as e:
-        print(f"Failed to parse JSON: {e}")
-        return
-    OPENAI_KEY = os.environ.get('OPENAI_KEY', None)
     if not OPENAI_KEY:
         print("OPENAI_KEY not set")
         return
-    OPENAI_ORG = os.environ.get('OPENAI_ORG', None)
-    GITHUB_TOKEN = os.environ.get('GITHUB_TOKEN', None)
     if not GITHUB_TOKEN:
         print("GITHUB_TOKEN not set")
         return
+
+    # Set the environment variables in the settings
     settings.set("OPENAI.KEY", OPENAI_KEY)
     if OPENAI_ORG:
         settings.set("OPENAI.ORG", OPENAI_ORG)
     settings.set("GITHUB.USER_TOKEN", GITHUB_TOKEN)
     settings.set("GITHUB.DEPLOYMENT_TYPE", "user")
+
+    # Load the event payload
+    try:
+        with open(GITHUB_EVENT_PATH, 'r') as f:
+            event_payload = json.load(f)
+    except json.decoder.JSONDecodeError as e:
+        print(f"Failed to parse JSON: {e}")
+        return
+
+    # Handle pull request event
     if GITHUB_EVENT_NAME == "pull_request":
-        action = event_payload.get("action", None)
+        action = event_payload.get("action")
         if action in ["opened", "reopened"]:
-            pr_url = event_payload.get("pull_request", {}).get("url", None)
+            pr_url = event_payload.get("pull_request", {}).get("url")
             if pr_url:
                 await PRReviewer(pr_url).review()
 
+    # Handle issue comment event
     elif GITHUB_EVENT_NAME == "issue_comment":
-        action = event_payload.get("action", None)
+        action = event_payload.get("action")
         if action in ["created", "edited"]:
-            comment_body = event_payload.get("comment", {}).get("body", None)
+            comment_body = event_payload.get("comment", {}).get("body")
             if comment_body:
-                pr_url = event_payload.get("issue", {}).get("pull_request", {}).get("url", None)
+                pr_url = event_payload.get("issue", {}).get("pull_request", {}).get("url")
                 if pr_url:
                     body = comment_body.strip().lower()
                     await PRAgent().handle_request(pr_url, body)
 
 
 if __name__ == '__main__':
-    asyncio.run(run_action())
+    asyncio.run(run_action())

pr_agent/servers/github_app.py

@@ -1,3 +1,4 @@
+from typing import Dict, Any
 import logging
 import sys
 
@@ -14,51 +15,66 @@ router = APIRouter()
 
 @router.post("/api/v1/github_webhooks")
 async def handle_github_webhooks(request: Request, response: Response):
-    logging.debug("Received a github webhook")
+    """
+    Receives and processes incoming GitHub webhook requests.
+    Verifies the request signature, parses the request body, and passes it to the handle_request function for further processing.
+    """
+    logging.debug("Received a GitHub webhook")
+    
     try:
         body = await request.json()
     except Exception as e:
         logging.error("Error parsing request body", e)
         raise HTTPException(status_code=400, detail="Error parsing request body") from e
+    
     body_bytes = await request.body()
     signature_header = request.headers.get('x-hub-signature-256', None)
-    try:
-        webhook_secret = settings.github.webhook_secret
-    except AttributeError:
-        webhook_secret = None
+    
+    webhook_secret = getattr(settings.github, 'webhook_secret', None)
+    
     if webhook_secret:
         verify_signature(body_bytes, webhook_secret, signature_header)
+    
     logging.debug(f'Request body:\n{body}')
+    
     return await handle_request(body)
 
 
-async def handle_request(body):
-    action = body.get("action", None)
-    installation_id = body.get("installation", {}).get("id", None)
+async def handle_request(body: Dict[str, Any]):
+    """
+    Handle incoming GitHub webhook requests.
+
+    Args:
+        body: The request body.
+    """
+    action = body.get("action")
+    installation_id = body.get("installation", {}).get("id")
     settings.set("GITHUB.INSTALLATION_ID", installation_id)
     agent = PRAgent()
+
     if action == 'created':
         if "comment" not in body:
             return {}
-        comment_body = body.get("comment", {}).get("body", None)
-        if 'sender' in body and 'login' in body['sender'] and 'bot' in body['sender']['login']:
+        comment_body = body.get("comment", {}).get("body")
+        sender = body.get("sender", {}).get("login")
+        if sender and 'bot' in sender:
             return {}
-        if "issue" not in body and "pull_request" not in body["issue"]:
+        if "issue" not in body or "pull_request" not in body["issue"]:
             return {}
         pull_request = body["issue"]["pull_request"]
-        api_url = pull_request.get("url", None)
+        api_url = pull_request.get("url")
         await agent.handle_request(api_url, comment_body)
 
     elif action in ["opened"] or 'reopened' in action:
-        pull_request = body.get("pull_request", None)
+        pull_request = body.get("pull_request")
         if not pull_request:
             return {}
-        api_url = pull_request.get("url", None)
-        if api_url is None:
+        api_url = pull_request.get("url")
+        if not api_url:
             return {}
         await agent.handle_request(api_url, "/review")
-    else:
-        return {}
+
+    return {}
 
 
 @router.get("/")
@@ -76,4 +92,4 @@ def start():
 
 
 if __name__ == '__main__':
-    start()
+    start()

pr_agent/servers/github_polling.py

@@ -15,28 +15,40 @@ NOTIFICATION_URL = "https://api.github.com/notifications"
 
 
 def now() -> str:
+    """
+    Get the current UTC time in ISO 8601 format.
+    
+    Returns:
+        str: The current UTC time in ISO 8601 format.
+    """
     now_utc = datetime.now(timezone.utc).isoformat()
     now_utc = now_utc.replace("+00:00", "Z")
     return now_utc
 
 
 async def polling_loop():
+    """
+    Polls for notifications and handles them accordingly.
+    """
     handled_ids = set()
     since = [now()]
     last_modified = [None]
     git_provider = get_git_provider()()
     user_id = git_provider.get_user_id()
     agent = PRAgent()
+
     try:
         deployment_type = settings.github.deployment_type
         token = settings.github.user_token
     except AttributeError:
         deployment_type = 'none'
         token = None
+
     if deployment_type != 'user':
         raise ValueError("Deployment mode must be set to 'user' to get notifications")
     if not token:
         raise ValueError("User token must be set to get notifications")
+
     async with aiohttp.ClientSession() as session:
         while True:
             try:
@@ -52,6 +64,7 @@ async def polling_loop():
                     params["since"] = since[0]
                 if last_modified[0]:
                     headers["If-Modified-Since"] = last_modified[0]
+
                 async with session.get(NOTIFICATION_URL, headers=headers, params=params) as response:
                     if response.status == 200:
                         if 'Last-Modified' in response.headers:
@@ -100,4 +113,4 @@ async def polling_loop():
 
 
 if __name__ == '__main__':
-    asyncio.run(polling_loop())
+    asyncio.run(polling_loop())

pr_agent/servers/gitlab_webhook.py

@@ -0,0 +1,47 @@
+import logging
+
+import uvicorn
+from fastapi import APIRouter, FastAPI, Request, status
+from fastapi.encoders import jsonable_encoder
+from fastapi.responses import JSONResponse
+from starlette.background import BackgroundTasks
+
+from pr_agent.agent.pr_agent import PRAgent
+from pr_agent.config_loader import settings
+
+app = FastAPI()
+router = APIRouter()
+
+
+@router.post("/webhook")
+async def gitlab_webhook(background_tasks: BackgroundTasks, request: Request):
+    data = await request.json()
+    if data.get('object_kind') == 'merge_request' and data['object_attributes'].get('action') in ['open', 'reopen']:
+        logging.info(f"A merge request has been opened: {data['object_attributes'].get('title')}")
+        url = data['object_attributes'].get('url')
+        background_tasks.add_task(PRAgent().handle_request, url, "/review")
+    elif data.get('object_kind') == 'note' and data['event_type'] == 'note':
+        if 'merge_request' in data:
+            mr = data['merge_request']
+            url = mr.get('url')
+            body = data.get('object_attributes', {}).get('note')
+            background_tasks.add_task(PRAgent().handle_request, url, body)
+    return JSONResponse(status_code=status.HTTP_200_OK, content=jsonable_encoder({"message": "success"}))
+
+def start():
+    gitlab_url = settings.get("GITLAB.URL", None)
+    if not gitlab_url:
+        raise ValueError("GITLAB.URL is not set")
+    gitlab_token = settings.get("GITLAB.PERSONAL_ACCESS_TOKEN", None)
+    if not gitlab_token:
+        raise ValueError("GITLAB.PERSONAL_ACCESS_TOKEN is not set")
+    settings.config.git_provider = "gitlab"
+
+    app = FastAPI()
+    app.include_router(router)
+
+    uvicorn.run(app, host="0.0.0.0", port=3000)
+
+
+if __name__ == '__main__':
+    start()

pr_agent/servers/utils.py

@@ -21,3 +21,7 @@ def verify_signature(payload_body, secret_token, signature_header):
     if not hmac.compare_digest(expected_signature, signature_header):
         raise HTTPException(status_code=403, detail="Request signatures didn't match!")
 
+
+class RateLimitExceeded(Exception):
+    """Raised when the git provider API rate limit has been exceeded."""
+    pass

pr_agent/settings/configuration.toml

@@ -1,6 +1,6 @@
 [config]
 model="gpt-4"
-fallback-models=["gpt-3.5-turbo-16k", "gpt-3.5-turbo"]
+fallback_models=["gpt-3.5-turbo-16k"]
 git_provider="github"
 publish_output=true
 publish_output_progress=true
@@ -24,9 +24,13 @@ publish_description_as_comment=false
 [pr_code_suggestions]
 num_code_suggestions=4
 
+[pr_update_changelog]
+push_changelog_changes=false
+
 [github]
 # The type of deployment to create. Valid values are 'app' or 'user'.
 deployment_type = "user"
+ratelimit_retries = 5
 
 [gitlab]
 # URL to the gitlab service
@@ -40,3 +44,8 @@ magic_word = "AutoReview"
 
 # Polling interval
 polling_interval_seconds = 30
+
+[local]
+# LocalGitProvider settings - uncomment to use paths other than default
+# description_path= "path/to/description.md"
+# review_path= "path/to/review.md"

pr_agent/settings/pr_update_changelog.toml

@@ -0,0 +1,34 @@
+[pr_update_changelog_prompt]
+system="""You are a language model called CodiumAI-PR-Changlog-summarizer.
+Your task is to update the CHANGELOG.md file of the project, to shortly summarize important changes introduced in this PR (the '+' lines).
+- The output should match the existing CHANGELOG.md format, style and conventions, so it will look like a natural part of the file. For example, if previous changes were summarized in a single line, you should do the same.
+- Don't repeat previous changes. Generate only new content, that is not already in the CHANGELOG.md file.
+- Be general, and avoid specific details, files, etc. The output should be minimal, no more than 3-4 short lines. Ignore non-relevant subsections.
+"""
+
+user="""PR Info:
+Title: '{{title}}'
+Branch: '{{branch}}'
+Description: '{{description}}'
+{%- if language %}
+Main language: {{language}}
+{%- endif %}
+
+
+The PR Diff:
+```
+{{diff}}
+```
+
+Current date:
+```
+{{today}}
+```
+
+The current CHANGELOG.md:
+```
+{{ changelog_file_str }}
+```
+
+Response:
+"""

pr_agent/tools/pr_description.py

@@ -1,6 +1,7 @@
 import copy
 import json
 import logging
+from typing import Tuple, List
 
 from jinja2 import Environment, StrictUndefined
 
@@ -14,11 +15,22 @@ from pr_agent.git_providers.git_provider import get_main_pr_language
 
 class PRDescription:
     def __init__(self, pr_url: str):
+        """
+        Initialize the PRDescription object with the necessary attributes and objects for generating a PR description using an AI model.
+        Args:
+            pr_url (str): The URL of the pull request.
+        """
+        
+        # Initialize the git provider and main PR language
         self.git_provider = get_git_provider()(pr_url)
         self.main_pr_language = get_main_pr_language(
             self.git_provider.get_languages(), self.git_provider.get_files()
         )
+    
+        # Initialize the AI handler
         self.ai_handler = AiHandler()
+    
+        # Initialize the variables dictionary
         self.vars = {
             "title": self.git_provider.pr.title,
             "branch": self.git_provider.get_pr_branch(),
@@ -26,67 +38,135 @@ class PRDescription:
             "language": self.main_pr_language,
             "diff": "",  # empty diff for initial calculation
         }
-        self.token_handler = TokenHandler(self.git_provider.pr,
-                                          self.vars,
-                                          settings.pr_description_prompt.system,
-                                          settings.pr_description_prompt.user)
+    
+        # Initialize the token handler
+        self.token_handler = TokenHandler(
+            self.git_provider.pr,
+            self.vars,
+            settings.pr_description_prompt.system,
+            settings.pr_description_prompt.user,
+        )
+    
+        # Initialize patches_diff and prediction attributes
         self.patches_diff = None
         self.prediction = None
 
     async def describe(self):
+        """
+        Generates a PR description using an AI model and publishes it to the PR.
+        """
         logging.info('Generating a PR description...')
         if settings.config.publish_output:
             self.git_provider.publish_comment("Preparing pr description...", is_temporary=True)
+        
         await retry_with_fallback_models(self._prepare_prediction)
+        
         logging.info('Preparing answer...')
         pr_title, pr_body, pr_types, markdown_text = self._prepare_pr_answer()
+        
         if settings.config.publish_output:
             logging.info('Pushing answer...')
             if settings.pr_description.publish_description_as_comment:
                 self.git_provider.publish_comment(markdown_text)
             else:
                 self.git_provider.publish_description(pr_title, pr_body)
-                self.git_provider.publish_labels(pr_types)
+                if self.git_provider.is_supported("get_labels"):
+                    current_labels = self.git_provider.get_labels()
+                    if current_labels is None:
+                        current_labels = []
+                    self.git_provider.publish_labels(pr_types + current_labels)
             self.git_provider.remove_initial_comment()
+        
         return ""
 
-    async def _prepare_prediction(self, model: str):
+    async def _prepare_prediction(self, model: str) -> None:
+        """
+        Prepare the AI prediction for the PR description based on the provided model.
+
+        Args:
+            model (str): The name of the model to be used for generating the prediction.
+
+        Returns:
+            None
+
+        Raises:
+            Any exceptions raised by the 'get_pr_diff' and '_get_prediction' functions.
+
+        """
         logging.info('Getting PR diff...')
         self.patches_diff = get_pr_diff(self.git_provider, self.token_handler, model)
         logging.info('Getting AI prediction...')
         self.prediction = await self._get_prediction(model)
 
-    async def _get_prediction(self, model: str):
+    async def _get_prediction(self, model: str) -> str:
+        """
+        Generate an AI prediction for the PR description based on the provided model.
+
+        Args:
+            model (str): The name of the model to be used for generating the prediction.
+
+        Returns:
+            str: The generated AI prediction.
+        """
         variables = copy.deepcopy(self.vars)
         variables["diff"] = self.patches_diff  # update diff
+
         environment = Environment(undefined=StrictUndefined)
         system_prompt = environment.from_string(settings.pr_description_prompt.system).render(variables)
         user_prompt = environment.from_string(settings.pr_description_prompt.user).render(variables)
+
         if settings.config.verbosity_level >= 2:
             logging.info(f"\nSystem prompt:\n{system_prompt}")
             logging.info(f"\nUser prompt:\n{user_prompt}")
-        response, finish_reason = await self.ai_handler.chat_completion(model=model, temperature=0.2,
-                                                                        system=system_prompt, user=user_prompt)
+
+        response, finish_reason = await self.ai_handler.chat_completion(
+            model=model,
+            temperature=0.2,
+            system=system_prompt,
+            user=user_prompt
+        )
+
         return response
 
-    def _prepare_pr_answer(self):
+    def _prepare_pr_answer(self) -> Tuple[str, str, List[str], str]:
+        """
+        Prepare the PR description based on the AI prediction data.
+
+        Returns:
+        - title: a string containing the PR title.
+        - pr_body: a string containing the PR body in a markdown format.
+        - pr_types: a list of strings containing the PR types.
+        - markdown_text: a string containing the AI prediction data in a markdown format.
+        """
+        # Load the AI prediction data into a dictionary
         data = json.loads(self.prediction)
-        markdown_text = ""
+
+        # Initialization
+        markdown_text = pr_body = ""
+        pr_types = []
+
+        # Iterate over the dictionary items and append the key and value to 'markdown_text' in a markdown format
         for key, value in data.items():
             markdown_text += f"## {key}\n\n"
             markdown_text += f"{value}\n\n"
-        pr_body = ""
-        pr_types = []
+
+        # If the 'PR Type' key is present in the dictionary, split its value by comma and assign it to 'pr_types'
         if 'PR Type' in data:
             pr_types = data['PR Type'].split(',')
-        title = data['PR Title']
-        del data['PR Title']
+
+        # Assign the value of the 'PR Title' key to 'title' variable and remove it from the dictionary
+        title = data.pop('PR Title')
+
+        # Iterate over the remaining dictionary items and append the key and value to 'pr_body' in a markdown format,
+        # except for the items containing the word 'walkthrough'
         for key, value in data.items():
             pr_body += f"{key}:\n"
             if 'walkthrough' in key.lower():
                 pr_body += f"{value}\n"
             else:
                 pr_body += f"**{value}**\n\n___\n"
+
         if settings.config.verbosity_level >= 2:
             logging.info(f"title:\n{title}\n{pr_body}")
-        return title, pr_body, pr_types, markdown_text
+
+        return title, pr_body, pr_types, markdown_text

pr_agent/tools/pr_reviewer.py

@@ -2,6 +2,7 @@ import copy
 import json
 import logging
 from collections import OrderedDict
+from typing import Tuple, List
 
 from jinja2 import Environment, StrictUndefined
 
@@ -16,7 +17,19 @@ from pr_agent.servers.help import actions_help_text, bot_help_text
 
 
 class PRReviewer:
-    def __init__(self, pr_url: str, cli_mode=False, is_answer: bool = False, args=None):
+    """
+    The PRReviewer class is responsible for reviewing a pull request and generating feedback using an AI model.
+    """
+    def __init__(self, pr_url: str, cli_mode: bool = False, is_answer: bool = False, args: list = None):
+        """
+        Initialize the PRReviewer object with the necessary attributes and objects to review a pull request.
+
+        Args:
+            pr_url (str): The URL of the pull request to be reviewed.
+            cli_mode (bool, optional): Indicates whether the review is being done in command-line interface mode. Defaults to False.
+            is_answer (bool, optional): Indicates whether the review is being done in answer mode. Defaults to False.
+            args (list, optional): List of arguments passed to the PRReviewer class. Defaults to None.
+        """
         self.parse_args(args)
 
         self.git_provider = get_git_provider()(pr_url, incremental=self.incremental)
@@ -25,13 +38,15 @@ class PRReviewer:
         )
         self.pr_url = pr_url
         self.is_answer = is_answer
+
         if self.is_answer and not self.git_provider.is_supported("get_issue_comments"):
             raise Exception(f"Answer mode is not supported for {settings.config.git_provider} for now")
-        answer_str, question_str = self._get_user_answers()
         self.ai_handler = AiHandler()
         self.patches_diff = None
         self.prediction = None
         self.cli_mode = cli_mode
+
+        answer_str, question_str = self._get_user_answers()
         self.vars = {
             "title": self.git_provider.pr.title,
             "branch": self.git_provider.get_pr_branch(),
@@ -43,16 +58,27 @@ class PRReviewer:
             "require_security": settings.pr_reviewer.require_security_review,
             "require_focused": settings.pr_reviewer.require_focused_review,
             'num_code_suggestions': settings.pr_reviewer.num_code_suggestions,
-            #
             'question_str': question_str,
             'answer_str': answer_str,
         }
-        self.token_handler = TokenHandler(self.git_provider.pr,
-                                          self.vars,
-                                          settings.pr_review_prompt.system,
-                                          settings.pr_review_prompt.user)
 
-    def parse_args(self, args):
+        self.token_handler = TokenHandler(
+            self.git_provider.pr,
+            self.vars,
+            settings.pr_review_prompt.system,
+            settings.pr_review_prompt.user
+        )
+
+    def parse_args(self, args: List[str]) -> None:
+        """
+        Parse the arguments passed to the PRReviewer class and set the 'incremental' attribute accordingly.
+
+        Args:
+            args: A list of arguments passed to the PRReviewer class.
+
+        Returns:
+            None
+        """
         is_incremental = False
         if args and len(args) >= 1:
             arg = args[0]
@@ -60,60 +86,93 @@ class PRReviewer:
                 is_incremental = True
         self.incremental = IncrementalPR(is_incremental)
 
-    async def review(self):
+    async def review(self) -> None:
+        """
+        Review the pull request and generate feedback.
+        """
         logging.info('Reviewing PR...')
+    
         if settings.config.publish_output:
             self.git_provider.publish_comment("Preparing review...", is_temporary=True)
+    
         await retry_with_fallback_models(self._prepare_prediction)
+    
         logging.info('Preparing PR review...')
         pr_comment = self._prepare_pr_review()
+    
         if settings.config.publish_output:
             logging.info('Pushing PR review...')
             self.git_provider.publish_comment(pr_comment)
             self.git_provider.remove_initial_comment()
+        
             if settings.pr_reviewer.inline_code_comments:
                 logging.info('Pushing inline code comments...')
                 self._publish_inline_code_comments()
-        return ""
 
-    async def _prepare_prediction(self, model: str):
+    async def _prepare_prediction(self, model: str) -> None:
+        """
+        Prepare the AI prediction for the pull request review.
+
+        Args:
+            model: A string representing the AI model to be used for the prediction.
+
+        Returns:
+            None
+        """
         logging.info('Getting PR diff...')
         self.patches_diff = get_pr_diff(self.git_provider, self.token_handler, model)
         logging.info('Getting AI prediction...')
         self.prediction = await self._get_prediction(model)
 
-    async def _get_prediction(self, model: str):
+    async def _get_prediction(self, model: str) -> str:
+        """
+        Generate an AI prediction for the pull request review.
+
+        Args:
+            model: A string representing the AI model to be used for the prediction.
+
+        Returns:
+            A string representing the AI prediction for the pull request review.
+        """
         variables = copy.deepcopy(self.vars)
         variables["diff"] = self.patches_diff  # update diff
+
         environment = Environment(undefined=StrictUndefined)
         system_prompt = environment.from_string(settings.pr_review_prompt.system).render(variables)
         user_prompt = environment.from_string(settings.pr_review_prompt.user).render(variables)
+
         if settings.config.verbosity_level >= 2:
             logging.info(f"\nSystem prompt:\n{system_prompt}")
             logging.info(f"\nUser prompt:\n{user_prompt}")
-        response, finish_reason = await self.ai_handler.chat_completion(model=model, temperature=0.2,
-                                                                        system=system_prompt, user=user_prompt)
+
+        response, finish_reason = await self.ai_handler.chat_completion(
+            model=model,
+            temperature=0.2,
+            system=system_prompt,
+            user=user_prompt
+        )
 
         return response
 
     def _prepare_pr_review(self) -> str:
+        """
+        Prepare the PR review by processing the AI prediction and generating a markdown-formatted text that summarizes the feedback.
+        """
         review = self.prediction.strip()
+    
         try:
             data = json.loads(review)
         except json.decoder.JSONDecodeError:
             data = try_fix_json(review)
 
-        # reordering for nicer display
-        if 'PR Feedback' in data:
-            if 'Security concerns' in data['PR Feedback']:
-                val = data['PR Feedback']['Security concerns']
-                del data['PR Feedback']['Security concerns']
-                data['PR Analysis']['Security concerns'] = val
+        # Move 'Security concerns' key to 'PR Analysis' section for better display
+        if 'PR Feedback' in data and 'Security concerns' in data['PR Feedback']:
+            val = data['PR Feedback']['Security concerns']
+            del data['PR Feedback']['Security concerns']
+            data['PR Analysis']['Security concerns'] = val
 
-        if settings.config.git_provider != 'bitbucket' and \
-                settings.pr_reviewer.inline_code_comments and \
-                'Code suggestions' in data['PR Feedback']:
-            # keeping only code suggestions that can't be submitted as inline comments
+        # Filter out code suggestions that can be submitted as inline comments
+        if settings.config.git_provider != 'bitbucket' and settings.pr_reviewer.inline_code_comments and 'Code suggestions' in data['PR Feedback']:
             data['PR Feedback']['Code suggestions'] = [
                 d for d in data['PR Feedback']['Code suggestions']
                 if any(key not in d for key in ('relevant file', 'relevant line in file', 'suggestion content'))
@@ -121,8 +180,8 @@ class PRReviewer:
             if not data['PR Feedback']['Code suggestions']:
                 del data['PR Feedback']['Code suggestions']
 
+        # Add incremental review section
         if self.incremental.is_incremental:
-            # Rename title when incremental review - Add to the beginning of the dict
             last_commit_url = f"{self.git_provider.get_pr_url()}/commits/{self.git_provider.incremental.first_new_commit_sha}"
             data = OrderedDict(data)
             data.update({'Incremental PR Review': {
@@ -132,6 +191,7 @@ class PRReviewer:
         markdown_text = convert_to_markdown(data)
         user = self.git_provider.get_user_id()
 
+        # Add help text if not in CLI mode
         if not self.cli_mode:
             markdown_text += "\n### How to use\n"
             if user and '[bot]' not in user:
@@ -139,11 +199,16 @@ class PRReviewer:
             else:
                 markdown_text += actions_help_text
 
+        # Log markdown response if verbosity level is high
         if settings.config.verbosity_level >= 2:
             logging.info(f"Markdown response:\n{markdown_text}")
+    
         return markdown_text
 
-    def _publish_inline_code_comments(self):
+    def _publish_inline_code_comments(self) -> None:
+        """
+        Publishes inline comments on a pull request with code suggestions generated by the AI model.
+        """
         if settings.pr_reviewer.num_code_suggestions == 0:
             return
 
@@ -153,11 +218,11 @@ class PRReviewer:
         except json.decoder.JSONDecodeError:
             data = try_fix_json(review)
 
-        comments = []
-        for d in data['PR Feedback']['Code suggestions']:
-            relevant_file = d.get('relevant file', '').strip()
-            relevant_line_in_file = d.get('relevant line in file', '').strip()
-            content = d.get('suggestion content', '')
+        comments: List[str] = []
+        for suggestion in data.get('PR Feedback', {}).get('Code suggestions', []):
+            relevant_file = suggestion.get('relevant file', '').strip()
+            relevant_line_in_file = suggestion.get('relevant line in file', '').strip()
+            content = suggestion.get('suggestion content', '')
             if not relevant_file or not relevant_line_in_file or not content:
                 logging.info("Skipping inline comment with missing file/line/content")
                 continue
@@ -172,15 +237,26 @@ class PRReviewer:
         if comments:
             self.git_provider.publish_inline_comments(comments)
 
-    def _get_user_answers(self):
-        answer_str = question_str = ""
+    def _get_user_answers(self) -> Tuple[str, str]:
+        """
+        Retrieves the question and answer strings from the discussion messages related to a pull request.
+
+        Returns:
+            A tuple containing the question and answer strings.
+        """
+        question_str = ""
+        answer_str = ""
+
         if self.is_answer:
             discussion_messages = self.git_provider.get_issue_comments()
-            for message in discussion_messages.reversed:
+
+            for message in reversed(discussion_messages):
                 if "Questions to better understand the PR:" in message.body:
                     question_str = message.body
                 elif '/answer' in message.body:
                     answer_str = message.body
+
                 if answer_str and question_str:
                     break
+
         return question_str, answer_str

pr_agent/tools/pr_update_changelog.py

@@ -0,0 +1,171 @@
+import copy
+import logging
+from datetime import date
+from time import sleep
+from typing import Tuple
+
+from jinja2 import Environment, StrictUndefined
+
+from pr_agent.algo.ai_handler import AiHandler
+from pr_agent.algo.pr_processing import get_pr_diff, retry_with_fallback_models
+from pr_agent.algo.token_handler import TokenHandler
+from pr_agent.config_loader import settings
+from pr_agent.git_providers import get_git_provider, GithubProvider
+from pr_agent.git_providers.git_provider import get_main_pr_language
+
+CHANGELOG_LINES = 50
+
+
+class PRUpdateChangelog:
+    def __init__(self, pr_url: str, cli_mode=False, args=None):
+
+        self.git_provider = get_git_provider()(pr_url)
+        self.main_language = get_main_pr_language(
+            self.git_provider.get_languages(), self.git_provider.get_files()
+        )
+        self.commit_changelog = self._parse_args(args, settings)
+        self._get_changlog_file()  # self.changelog_file_str
+        self.ai_handler = AiHandler()
+        self.patches_diff = None
+        self.prediction = None
+        self.cli_mode = cli_mode
+        self.vars = {
+            "title": self.git_provider.pr.title,
+            "branch": self.git_provider.get_pr_branch(),
+            "description": self.git_provider.get_pr_description(),
+            "language": self.main_language,
+            "diff": "",  # empty diff for initial calculation
+            "changelog_file_str": self.changelog_file_str,
+            "today": date.today(),
+        }
+        self.token_handler = TokenHandler(self.git_provider.pr,
+                                          self.vars,
+                                          settings.pr_update_changelog_prompt.system,
+                                          settings.pr_update_changelog_prompt.user)
+
+    async def update_changelog(self):
+        assert type(self.git_provider) == GithubProvider, "Currently only Github is supported"
+
+        logging.info('Updating the changelog...')
+        if settings.config.publish_output:
+            self.git_provider.publish_comment("Preparing changelog updates...", is_temporary=True)
+        await retry_with_fallback_models(self._prepare_prediction)
+        logging.info('Preparing PR changelog updates...')
+        new_file_content, answer = self._prepare_changelog_update()
+        if settings.config.publish_output:
+            self.git_provider.remove_initial_comment()
+            logging.info('Publishing changelog updates...')
+            if self.commit_changelog:
+                logging.info('Pushing PR changelog updates to repo...')
+                self._push_changelog_update(new_file_content, answer)
+            else:
+                logging.info('Publishing PR changelog as comment...')
+                self.git_provider.publish_comment(f"**Changelog updates:**\n\n{answer}")
+
+    async def _prepare_prediction(self, model: str):
+        logging.info('Getting PR diff...')
+        self.patches_diff = get_pr_diff(self.git_provider, self.token_handler, model)
+        logging.info('Getting AI prediction...')
+        self.prediction = await self._get_prediction(model)
+
+    async def _get_prediction(self, model: str):
+        variables = copy.deepcopy(self.vars)
+        variables["diff"] = self.patches_diff  # update diff
+        environment = Environment(undefined=StrictUndefined)
+        system_prompt = environment.from_string(settings.pr_update_changelog_prompt.system).render(variables)
+        user_prompt = environment.from_string(settings.pr_update_changelog_prompt.user).render(variables)
+        if settings.config.verbosity_level >= 2:
+            logging.info(f"\nSystem prompt:\n{system_prompt}")
+            logging.info(f"\nUser prompt:\n{user_prompt}")
+        response, finish_reason = await self.ai_handler.chat_completion(model=model, temperature=0.2,
+                                                                        system=system_prompt, user=user_prompt)
+
+        return response
+
+    def _prepare_changelog_update(self) -> Tuple[str, str]:
+        answer = self.prediction.strip().strip("```").strip()
+        if hasattr(self, "changelog_file"):
+            existing_content = self.changelog_file.decoded_content.decode()
+        else:
+            existing_content = ""
+        if existing_content:
+            new_file_content = answer + "\n\n" + self.changelog_file.decoded_content.decode()
+        else:
+            new_file_content = answer
+
+        if not self.commit_changelog:
+            answer += "\n\n\n>to commit the new content to the CHANGELOG.md file, please type:" \
+                      "\n>'/update_changelog -commit'\n"
+
+        if settings.config.verbosity_level >= 2:
+            logging.info(f"answer:\n{answer}")
+
+        return new_file_content, answer
+
+    def _push_changelog_update(self, new_file_content, answer):
+        self.git_provider.repo_obj.update_file(path=self.changelog_file.path,
+                                               message="Update CHANGELOG.md",
+                                               content=new_file_content,
+                                               sha=self.changelog_file.sha,
+                                               branch=self.git_provider.get_pr_branch())
+        d = dict(body="CHANGELOG.md update",
+                 path=self.changelog_file.path,
+                 line=max(2, len(answer.splitlines())),
+                 start_line=1)
+
+        sleep(5)  # wait for the file to be updated
+        last_commit_id = list(self.git_provider.pr.get_commits())[-1]
+        try:
+            self.git_provider.pr.create_review(commit=last_commit_id, comments=[d])
+        except:
+            # we can't create a review for some reason, let's just publish a comment
+            self.git_provider.publish_comment(f"**Changelog updates:**\n\n{answer}")
+
+
+    def _get_default_changelog(self):
+        example_changelog = \
+"""
+Example:
+## <current_date>
+
+### Added
+...
+### Changed
+...
+### Fixed
+...
+"""
+        return example_changelog
+
+    def _parse_args(self, args, setting):
+        commit_changelog = False
+        if args and len(args) >= 1:
+            try:
+                if args[0] == "-commit":
+                    commit_changelog = True
+            except:
+                pass
+        else:
+            commit_changelog = setting.pr_update_changelog.push_changelog_changes
+
+        return commit_changelog
+
+    def _get_changlog_file(self):
+        try:
+            self.changelog_file = self.git_provider.repo_obj.get_contents("CHANGELOG.md",
+                                                                          ref=self.git_provider.get_pr_branch())
+            changelog_file_lines = self.changelog_file.decoded_content.decode().splitlines()
+            changelog_file_lines = changelog_file_lines[:CHANGELOG_LINES]
+            self.changelog_file_str = "\n".join(changelog_file_lines)
+        except:
+            self.changelog_file_str = ""
+            if self.commit_changelog:
+                logging.info("No CHANGELOG.md file found in the repository. Creating one...")
+                changelog_file = self.git_provider.repo_obj.create_file(path="CHANGELOG.md",
+                                                                             message='add CHANGELOG.md',
+                                                                             content="",
+                                                                             branch=self.git_provider.get_pr_branch())
+                self.changelog_file = changelog_file['content']
+
+        if not self.changelog_file_str:
+            self.changelog_file_str = self._get_default_changelog()

pyproject.toml

@@ -1,3 +1,63 @@
+[build-system]
+requires = ["setuptools>=61.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "pr_agent"
+version = "0.0.1"
+
+authors = [
+  {name = "Itamar Friedman", email = "itamar.f@codium.ai"},
+]
+maintainers = [
+  {name = "Ori Kotek", email = "ori.k@codium.ai"},
+  {name = "Tal Ridnik", email = "tal.r@codium.ai"},
+  {name = "Hussam Lawen", email = "hussam.l@codium.ai"},
+  {name = "Sagi Medina", email = "sagi.m@codium.ai"}
+]
+description = "CodiumAI PR-Agent is an open-source tool to automatically analyze a pull request and provide several types of feedback"
+readme = "README.md"
+requires-python = ">=3.9"
+keywords = ["ai", "tool", "developer", "review", "agent"]
+license = {file = "LICENSE", name = "Apache 2.0 License"}
+classifiers = [
+  "Development Status :: 3 - Alpha",
+  "Intended Audience :: Developers",
+  "Operating System :: Independent",
+  "Programming Language :: Python :: 3",
+]
+
+dependencies = [
+  "dynaconf==3.1.12",
+  "fastapi==0.99.0",
+  "PyGithub==1.59.*",
+  "retry==0.9.2",
+  "openai==0.27.8",
+  "Jinja2==3.1.2",
+  "tiktoken==0.4.0",
+  "uvicorn==0.22.0",
+  "python-gitlab==3.15.0",
+  "pytest~=7.4.0",
+  "aiohttp~=3.8.4",
+  "atlassian-python-api==3.39.0",
+  "GitPython~=3.1.32",
+]
+
+[project.urls]
+"Homepage" = "https://github.com/Codium-ai/pr-agent"
+
+[tool.setuptools]
+include-package-data = false
+license-files = ["LICENSE"]
+
+[tool.setuptools.packages.find]
+where = ["."]
+include = ["pr_agent"]
+
+[project.scripts]
+pr-agent = "pr_agent.cli:run"
+
+
 [tool.ruff]
 
 line-length = 120

requirements.txt

@@ -1,12 +1 @@
-dynaconf==3.1.12
-fastapi==0.99.0
-PyGithub==1.59.*
-retry==0.9.2
-openai==0.27.8
-Jinja2==3.1.2
-tiktoken==0.4.0
-uvicorn==0.22.0
-python-gitlab==3.15.0
-pytest~=7.4.0
-aiohttp~=3.8.4
-atlassian-python-api==3.39.0
+-e .

setup.py

@@ -0,0 +1,5 @@
+# for compatibility with legacy tools
+# see: https://setuptools.pypa.io/en/latest/userguide/pyproject_config.html
+from setuptools import setup
+
+setup()