repo,

pull_number: issue.number,

});

let mergedBaseline = "";

let mergedCandidate = "";

if (pr.merged) {

const { data: commits } = await github.rest.pulls.listCommits({

owner,

repo,

pull_number: issue.number,

per_page: 100,

});

mergedCandidate = pr.merge_commit_sha || commits.at(-1)?.sha || "";

mergedBaseline = mergedCandidate && commits.length > 0 ? `${mergedCandidate}~${commits.length}` : "";

}

const baselineMatch = body.match(/(?:baseline|base)[\s:=]+([^\s`]+)/i);

const candidateMatch = body.match(/(?:candidate|head)[\s:=]+([^\s`]+)/i);

const providerMatch = body.match(/(?:provider|crabbox_provider)[\s:=]+([^\s`]+)/i);

const candidate =

rawCandidate && !["head", "pr", "pr-head"].includes(rawCandidate.toLowerCase())

? rawCandidate

: pr.head.sha;

: mergedCandidate || pr.head.sha;

setOutput("should_run", "true");

setOutput("baseline_ref", baselineMatch?.[1] || "main");

setOutput("baseline_ref", baselineMatch?.[1] || mergedBaseline || "main");

setOutput("candidate_ref", candidate);

setOutput("pr_number", String(issue.number));

setOutput("instructions", body);

BASELINE_REF: ${{ needs.resolve_request.outputs.baseline_ref }}

CANDIDATE_REF: ${{ needs.resolve_request.outputs.candidate_ref }}

GH_TOKEN: ${{ github.token }}

PR_NUMBER: ${{ needs.resolve_request.outputs.pr_number }}

shell: bash

run: |

set -euo pipefail

git fetch --no-tags origin +refs/heads/main:refs/remotes/origin/main

if [[ -n "${PR_NUMBER:-}" ]]; then

git fetch --no-tags origin "+refs/pull/${PR_NUMBER}/head:refs/remotes/origin/pr/${PR_NUMBER}" || true

fi

validate_ref() {

local label="$1"

local input_ref="$2"

local revision=""

local reason=""

revision="$(git rev-parse "${input_ref}^{commit}")"

if ! revision="$(git rev-parse --verify "${input_ref}^{commit}" 2>/dev/null)"; then

echo "${label} ref '${input_ref}' is not available in the workflow checkout." >&2

exit 1

fi

if git merge-base --is-ancestor "$revision" refs/remotes/origin/main; then

reason="main-ancestor"

elif git tag --points-at "$revision" | grep -Eq '^v'; then