#!/usr/bin/env bash
set -euo pipefail

CURRENT_BRANCH="${SPLIT_BRANCH:-${GITHUB_REF_NAME:-$(git rev-parse --abbrev-ref HEAD)}}"
BASEPATH="$(cd "$(dirname "$0")"; cd ../plugin/; pwd)"
REPOS=("$@")

case "$CURRENT_BRANCH" in
  v6-dev|v8-dev) ;;
  *)
    echo "Only v6-dev and v8-dev are allowed to split, current: ${CURRENT_BRANCH}" >&2
    exit 1
    ;;
esac

remote() {
  local name="$1"
  local url="$2"
  if git remote get-url "$name" >/dev/null 2>&1; then
    git remote set-url "$name" "$url"
  else
    git remote add "$name" "$url"
  fi
}

split_branch() {
  local repo="$1"
  local prefix="plugin/${repo}"
  local sha1

  sha1="$(.github/splitsh-lite-linux --prefix="$prefix")"
  echo "Split ${prefix} => ${sha1}, push branch ${CURRENT_BRANCH}"
  git push "$repo" "${sha1}:refs/heads/${CURRENT_BRANCH}" -f
}

if [[ ${#REPOS[@]} -eq 0 ]]; then
  while IFS= read -r repo; do
    REPOS+=("$repo")
  done < <(find "$BASEPATH" -mindepth 1 -maxdepth 1 -type d -exec basename {} \; | sort)
fi

if [[ -n "${GITHUB_ACTIONS:-}" ]]; then
  git fetch origin "$CURRENT_BRANCH" || true
else
  git pull --ff-only origin "$CURRENT_BRANCH"
fi

for repo in "${REPOS[@]}"; do
  remote "$repo" "git@github.com:zoujingli/${repo}.git"
  split_branch "$repo"
done