#!/bin/bash

# scripts/review.sh

#

# Usage: ./scripts/review.sh <pr#> [model]

set -e

if [[ -z "${1}" ]]; then

echo "Usage: ${0} <pr#> [model]"

exit 1

fi

pr="${1}"

model="${2:-gemini-3.1-pro-preview}"

REPO="google-gemini/gemini-cli"

REVIEW_DIR="${HOME}/git/review/gemini-cli"

if [[ ! -d "${REVIEW_DIR}" ]]; then

echo "ERROR: Directory ${REVIEW_DIR} does not exist."

echo ""

echo "Please create a new gemini-cli clone at that directory to use for reviews."

echo "Instructions:"

echo " mkdir -p ~/git/review"

echo " cd ~/git/review"

echo " git clone https://github.com/google-gemini/gemini-cli.git"

exit 1

fi

# 1. Check if the PR exists before doing anything else

echo "review: Validating PR ${pr} on ${REPO}..."

if ! gh pr view "${pr}" -R "${REPO}" > /dev/null 2>&1; then

echo "ERROR: Could not find PR #${pr} in ${REPO}."

echo "Are you sure ${pr} is a Pull Request number and not an Issue number?"

exit 1

fi

echo "review: Opening PR ${pr} in browser..."

uname_out="$(uname || true)"

if [[ "${uname_out}" == "Darwin" ]]; then

open "https://github.com/${REPO}/pull/${pr}" || true

else

xdg-open "https://github.com/${REPO}/pull/${pr}" || true

fi

echo "review: Changing directory to ${REVIEW_DIR}"

cd "${REVIEW_DIR}" || exit 1

# 2. Fetch latest main to ensure we have a clean starting point

echo "review: Fetching latest from origin..."

git fetch origin main

# 3. Handle worktree creation

WORKTREE_PATH="pr_${pr}"

if [[ -d "${WORKTREE_PATH}" ]]; then

echo "review: Worktree directory ${WORKTREE_PATH} already exists."

# Check if it's actually a registered worktree

# shellcheck disable=SC2312

if git worktree list | grep -q "${WORKTREE_PATH}"; then

echo "review: Reusing existing worktree..."

else

echo "review: Directory exists but is not a worktree. Cleaning up..."

rm -rf "${WORKTREE_PATH}"

fi

fi

if [[ ! -d "${WORKTREE_PATH}" ]]; then

echo "review: Adding new worktree at ${WORKTREE_PATH}..."

# Create a detached worktree from origin/main

git worktree add --detach "${WORKTREE_PATH}" origin/main

fi

echo "review: Changing directory to ${WORKTREE_PATH}"

cd "${WORKTREE_PATH}" || exit 1

# 4. Checkout the PR

echo "review: Cleaning worktree and checking out PR ${pr}..."

git reset --hard

git clean -fd

gh pr checkout "${pr}" --branch "review-${pr}" -f -R "${REPO}"

# 5. Clean and Build

echo "review: Clearing possibly stale node_modules..."

rm -rf node_modules

rm -rf packages/core/dist/

rm -rf packages/cli/node_modules/

rm -rf packages/core/node_modules/

echo "review: Installing npm dependencies..."

npm install

echo "--- build ---"

temp_dir_base="${TMPDIR:-/tmp}"

build_log_file="$(mktemp "${temp_dir_base}/npm_build_log.XXXXXX" || true)"

if [[ -z "${build_log_file}" || ! -f "${build_log_file}" ]]; then

echo "Attempting to create temporary file in current directory as a fallback." >&2

build_log_file="$(mktemp "./npm_build_log_fallback.XXXXXX" || true)"

if [[ -z "${build_log_file}" || ! -f "${build_log_file}" ]]; then

echo "ERROR: Critical - Failed to create any temporary build log file. Aborting." >&2

exit 1

fi

fi

build_status=0

build_command_to_run="FORCE_COLOR=1 CLICOLOR_FORCE=1 npm run build"

echo "Running build. Output (with colors) will be shown below and saved to: ${build_log_file}"

echo "Build command: ${build_command_to_run}"

if [[ "${uname_out}" == "Darwin" ]]; then

script -q "${build_log_file}" /bin/sh -c "${build_command_to_run}" || build_status=$?

else

if script -q -e -c "${build_command_to_run}" "${build_log_file}"; then

build_status=0

else

build_status=$?

fi

fi

if [[ "${build_status}" -ne 0 ]]; then

echo "ERROR: npm build failed with exit status ${build_status}." >&2

echo "Review output above. Full log (with color codes) was in ${build_log_file}." >&2

exit 1

else

# shellcheck disable=SC2312

if grep -q -i -E "\berror\b|\bfailed\b|ERR!|FATAL|critical" "${build_log_file}"; then

echo "ERROR: npm build completed with exit status 0, but suspicious error patterns were found in the build output." >&2

echo "Review output above. Full log (with color codes) was in ${build_log_file}." >&2

exit 1

fi

echo "npm build completed successfully (exit status 0, no critical error patterns found in log)."

rm -f "${build_log_file}"

fi

echo "-- running ---"

if ! npm start -- -m "${model}" -i="/review-frontend ${pr}"; then

echo "ERROR: npm start failed. Please check its output for details." >&2

exit 1

fi