forgejo-ai-pr-review/scripts/run-review.sh
2026-03-14 21:43:56 +02:00

95 lines
3.2 KiB
Bash

#!/usr/bin/env bash
# Required env vars: AI_API_URL, AI_API_KEY, AI_MODEL, PR_TITLE, PR_BODY
# Optional env vars: PREV_REVIEW, INCREMENTAL
# Reads: pr.diff, prompts/review.md (or prompts/review-update.md for incremental)
# Writes: $GITHUB_OUTPUT (review)
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROMPTS_DIR="${SCRIPT_DIR}/../prompts"
DIFF=$(cat pr.diff)
echo "Diff size: $(wc -c < pr.diff) bytes"
if [ "${INCREMENTAL:-false}" = "true" ] && [ -n "${PREV_REVIEW:-}" ]; then
echo "Building incremental review with conversation history"
SYSTEM_PROMPT=$(cat "${PROMPTS_DIR}/review-update.md")
# Reconstruct conversation: the model previously reviewed an earlier state,
# now we show it only what changed since then.
MESSAGES=$(jq -n \
--arg system "$SYSTEM_PROMPT" \
--arg prev "$PREV_REVIEW" \
--arg title "$PR_TITLE" \
--arg body "$PR_BODY" \
--arg diff "$DIFF" \
'[
{ role: "system", content: $system },
{ role: "assistant", content: $prev },
{ role: "user", content: ("The PR has been updated. Here are the new changes since your last review.\n\nPR Title: " + $title + "\nPR Description: " + $body + "\n\nIncremental diff:\n```diff\n" + $diff + "\n```\n\nUpdate your review, keeping previous feedback relevant to unchanged code and focusing new commentary on what has changed.") }
]')
else
echo "Building full review"
SYSTEM_PROMPT=$(cat "${PROMPTS_DIR}/review.md")
MESSAGES=$(jq -n \
--arg system "$SYSTEM_PROMPT" \
--arg title "$PR_TITLE" \
--arg body "$PR_BODY" \
--arg diff "$DIFF" \
'[
{ role: "system", content: $system },
{ role: "user", content: ("PR Title: " + $title + "\nPR Description: " + $body + "\n\nDiff:\n```diff\n" + $diff + "\n```") }
]')
fi
PAYLOAD=$(jq -n \
--arg model "$AI_MODEL" \
--argjson messages "$MESSAGES" \
'{
model: $model,
messages: $messages,
max_tokens: 1024,
temperature: 0.2
}')
echo "Payload size: $(echo "$PAYLOAD" | wc -c) bytes"
echo "Calling endpoint: ${AI_API_URL%/}/chat/completions"
echo "Model: ${AI_MODEL}"
HTTP_RESPONSE=$(curl -s \
--max-time 120 \
-w "\n__HTTP_STATUS__:%{http_code}" \
-H "Authorization: Bearer ${AI_API_KEY}" \
-H "Content-Type: application/json" \
-d "$PAYLOAD" \
"${AI_API_URL%/}/chat/completions")
CURL_EXIT=$?
HTTP_STATUS=$(echo "$HTTP_RESPONSE" | grep '__HTTP_STATUS__:' | cut -d: -f2)
RESPONSE_BODY=$(echo "$HTTP_RESPONSE" | sed '/__HTTP_STATUS__:/d')
echo "curl exit code: ${CURL_EXIT}"
echo "HTTP status: ${HTTP_STATUS}"
echo "Response body: ${RESPONSE_BODY}"
if [ "$CURL_EXIT" -ne 0 ]; then
echo "::error::curl failed with exit code ${CURL_EXIT}"
exit 1
fi
if [ "$HTTP_STATUS" -lt 200 ] || [ "$HTTP_STATUS" -ge 300 ]; then
echo "::error::API returned HTTP ${HTTP_STATUS}: ${RESPONSE_BODY}"
exit 1
fi
REVIEW=$(echo "$RESPONSE_BODY" | jq -r '.choices[0].message.content')
if [ -z "$REVIEW" ] || [ "$REVIEW" = "null" ]; then
echo "::error::Failed to extract review from response. Full body: ${RESPONSE_BODY}"
exit 1
fi
echo "Review length: $(echo "$REVIEW" | wc -c) chars"
echo "review<<EOF" >> "$GITHUB_OUTPUT"
echo "$REVIEW" >> "$GITHUB_OUTPUT"
echo "EOF" >> "$GITHUB_OUTPUT"