Initial commit - PR-Agent OSS release

pr_agent/tools/pr_reviewer.py

@@ -0,0 +1,88 @@
+import copy
+import json
+import logging
+from typing import Optional
+
+from jinja2 import Environment, StrictUndefined
+
+from pr_agent.algo.ai_handler import AiHandler
+from pr_agent.algo.pr_processing import get_pr_diff
+from pr_agent.algo.token_handler import TokenHandler
+from pr_agent.algo.utils import convert_to_markdown
+from pr_agent.config_loader import settings
+from pr_agent.git_providers import get_git_provider
+
+
+class PRReviewer:
+    def __init__(self, pr_url: str, installation_id: Optional[int] = None):
+
+        self.git_provider = get_git_provider()(pr_url, installation_id)
+        self.main_language = self.git_provider.get_main_pr_language()
+        self.installation_id = installation_id
+        self.ai_handler = AiHandler()
+        self.patches_diff = None
+        self.prediction = None
+        self.vars = {
+            "title": self.git_provider.pr.title,
+            "branch": self.git_provider.get_pr_branch(),
+            "description": self.git_provider.pr.body,
+            "language": self.git_provider.get_main_pr_language(),
+            "diff": "",  # empty diff for initial calculation
+            "require_tests": settings.pr_reviewer.require_tests_review,
+            "require_security": settings.pr_reviewer.require_security_review,
+            "require_minimal_and_focused": settings.pr_reviewer.require_minimal_and_focused_review,
+            'extended_code_suggestions': settings.pr_reviewer.extended_code_suggestions,
+            'num_code_suggestions': settings.pr_reviewer.num_code_suggestions,
+        }
+        self.token_handler = TokenHandler(self.git_provider.pr,
+                                          self.vars,
+                                          settings.pr_review_prompt.system,
+                                          settings.pr_review_prompt.user)
+
+    async def review(self):
+        logging.info('Reviewing PR...')
+        if settings.config.publish_review:
+            self.git_provider.publish_comment("Preparing review...")
+        logging.info('Getting PR diff...')
+        self.patches_diff = get_pr_diff(self.git_provider, self.token_handler)
+        logging.info('Getting AI prediction...')
+        self.prediction = await self._get_prediction()
+        logging.info('Preparing PR review...')
+        pr_comment = self._prepare_pr_review()
+        if settings.config.publish_review:
+            logging.info('Pushing PR review...')
+            self.git_provider.publish_comment(pr_comment)
+        return ""
+
+    async def _get_prediction(self):
+        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}")
+        model = settings.config.model
+        response, finish_reason = await self.ai_handler.chat_completion(model=model, temperature=0.2,
+                                                                        system=system_prompt, user=user_prompt)
+        try:
+            json.loads(response)
+        except json.decoder.JSONDecodeError:
+            logging.warning("Could not decode JSON")
+            response = {}
+        return response
+
+    def _prepare_pr_review(self) -> str:
+        review = self.prediction.strip()
+        try:
+            data = json.loads(review)
+        except json.decoder.JSONDecodeError:
+            logging.error("Unable to decode JSON response from AI")
+            data = {}
+        markdown_text = convert_to_markdown(data)
+        markdown_text += "\nAdd a comment that says 'Please review' to ask for a new review after you update the PR.\n"
+        markdown_text += "Add a comment that says 'Please answer <QUESTION...>' to ask a question about this PR.\n"
+        if settings.config.verbosity_level >= 2:
+            logging.info(f"Markdown response:\n{markdown_text}")
+        return markdown_text