source .local/prep.env

local pr_meta_json

pr_meta_json=$(gh pr view "$pr" --json number,title,state,isDraft,author)

local pr_title

pr_title=$(printf '%s\n' "$pr_meta_json" | jq -r .title)

local pr_number

pr_number=$(printf '%s\n' "$pr_meta_json" | jq -r .number)

local contrib

contrib=$(printf '%s\n' "$pr_meta_json" | jq -r .author.login)

pr_meta_json=$(gh pr view "$pr" --json state,isDraft)

local is_draft

is_draft=$(printf '%s\n' "$pr_meta_json" | jq -r .isDraft)

if [ "$is_draft" = "true" ]; then

echo "PR is draft; stop."

exit 1

fi

local reviewer

reviewer=$(gh api user --jq .login)

local reviewer_id

reviewer_id=$(gh api user --jq .id)

local contrib_coauthor_email="${COAUTHOR_EMAIL:-}"

if [ -z "$contrib_coauthor_email" ] || [ "$contrib_coauthor_email" = "null" ]; then

if contrib_coauthor_email=$(resolve_contributor_coauthor_email "$contrib"); then

:

else

contrib_coauthor_email=""

fi

fi

local reviewer_email_candidates=()

local reviewer_email_candidate

while IFS= read -r reviewer_email_candidate; do

[ -n "$reviewer_email_candidate" ] || continue

reviewer_email_candidates+=("$reviewer_email_candidate")

done < <(merge_author_email_candidates "$reviewer" "$reviewer_id")

if [ "${#reviewer_email_candidates[@]}" -eq 0 ]; then

echo "Unable to resolve a candidate merge author email for reviewer $reviewer"

exit 1

fi

local reviewer_email="${reviewer_email_candidates[0]}"

local reviewer_coauthor_email="${reviewer_id}+${reviewer}@users.noreply.github.com"

{

echo "Merged via squash."

echo

echo "Prepared head SHA: $PREP_HEAD_SHA"

if [ -n "$contrib_coauthor_email" ]; then

echo "Co-authored-by: $contrib <$contrib_coauthor_email>"

fi

echo "Co-authored-by: $reviewer <$reviewer_coauthor_email>"

echo "Reviewed-by: @$reviewer"

} > .local/merge-body.txt

delete_remote_pr_head_branch_after_merge() {

local head_json

head_json=$(gh pr view "$pr" --json headRefName,headRepository,headRepositoryOwner,isCrossRepository,maintainerCanModify)

return 0

}

run_merge_with_email() {

local email="$1"

local merge_output_file

merge_output_file=$(mktemp)

if gh pr merge "$pr" \

--squash \

--match-head-commit "$PREP_HEAD_SHA" \

--author-email "$email" \

--subject "$pr_title (#$pr_number)" \

--body-file .local/merge-body.txt \

>"$merge_output_file" 2>&1

then

rm -f "$merge_output_file"

return 0

fi

MERGE_ERR_MSG=$(cat "$merge_output_file")

print_relevant_log_excerpt "$merge_output_file"

rm -f "$merge_output_file"

return 1

}

local MERGE_ERR_MSG=""

local selected_merge_author_email="$reviewer_email"

if ! run_merge_with_email "$selected_merge_author_email"; then

if is_author_email_merge_error "$MERGE_ERR_MSG" && [ "${#reviewer_email_candidates[@]}" -ge 2 ]; then

selected_merge_author_email="${reviewer_email_candidates[1]}"

echo "Retrying merge once with fallback author email: $selected_merge_author_email"

run_merge_with_email "$selected_merge_author_email" || {

echo "Merge failed after fallback retry."

exit 1

}

else

echo "Merge failed."

exit 1

fi

if ! gh pr merge "$pr" \

--rebase \

--match-head-commit "$PREP_HEAD_SHA" \

>.local/merge-output.log 2>&1

then

print_relevant_log_excerpt .local/merge-output.log

exit 1

fi

local state

state=$(gh pr view "$pr" --json state --jq .state)

if [ "$state" != "MERGED" ]; then

echo "Merge not finalized yet (state=$state), waiting up to 15 minutes..."

echo "Landing not finalized yet (state=$state), waiting up to 15 minutes..."

local i

for i in $(seq 1 90); do

sleep 10

exit 1

fi

local merge_sha

merge_sha=$(gh pr view "$pr" --json mergeCommit --jq '.mergeCommit.oid')

if [ -z "$merge_sha" ] || [ "$merge_sha" = "null" ]; then

echo "Merge commit SHA missing."

local landed_sha

landed_sha=$(gh pr view "$pr" --json mergeCommit --jq '.mergeCommit.oid')

if [ -z "$landed_sha" ] || [ "$landed_sha" = "null" ]; then

echo "Landed commit SHA missing."

exit 1

fi

local repo_nwo

repo_nwo=$(gh repo view --json nameWithOwner --jq .nameWithOwner)

local merge_sha_url=""

if gh api repos/:owner/:repo/commits/"$merge_sha" >/dev/null 2>&1; then

merge_sha_url="https://github.com/$repo_nwo/commit/$merge_sha"

local landed_sha_url=""

if gh api repos/:owner/:repo/commits/"$landed_sha" >/dev/null 2>&1; then

landed_sha_url="https://github.com/$repo_nwo/commit/$landed_sha"

else

echo "Merge commit is not resolvable via repository commit endpoint: $merge_sha"

echo "Landed commit is not resolvable via repository commit endpoint: $landed_sha"

exit 1

fi

exit 1

fi

local commit_body

commit_body=$(gh api repos/:owner/:repo/commits/"$merge_sha" --jq .commit.message)

if [ -n "$contrib_coauthor_email" ]; then

printf '%s\n' "$commit_body" | rg -q "^Co-authored-by: $contrib <" || { echo "Missing PR author co-author trailer"; exit 1; }

else

echo "Skipping PR author co-author trailer check for bot/app author $contrib."

fi

printf '%s\n' "$commit_body" | rg -q "^Co-authored-by: $reviewer <" || { echo "Missing reviewer co-author trailer"; exit 1; }

local ok=0

local comment_output=""

local attempt

for attempt in 1 2 3; do

if comment_output=$(

{

echo "Merged via squash."

echo "Merged via rebase."

echo

echo "- Prepared head SHA: [$PREP_HEAD_SHA]($prep_sha_url)"

echo "- Merge commit: [$merge_sha]($merge_sha_url)"

if pr_contributor_allows_human_trailers "$contrib"; then

echo

echo "Thanks @$contrib!"

fi

echo "- Landed commit: [$landed_sha]($landed_sha_url)"

} | gh pr comment "$pr" -F - 2>&1

); then

ok=1

pr_url=$(gh pr view "$pr" --json url --jq .url)

echo "merge-run complete for PR #$pr"

echo "merge commit: $merge_sha"

echo "merge author email: $selected_merge_author_email"

echo "landed commit: $landed_sha"

echo "completion comment: $comment_url"

echo "$pr_url"

}