#!/bin/bash

mkdir -p vscode
cd vscode || { echo "'vscode' dir not found"; exit 1; }

git init -q
git remote add origin https://github.com/Microsoft/vscode.git

# figure out latest tag by calling MS update API
if [ "${INSIDER}" == "1" ]; then
  UPDATE_INFO=$(curl https://update.code.visualstudio.com/api/update/darwin/insider/lol)
  export MS_COMMIT=$(echo "${UPDATE_INFO}" | jq -r '.version')
  export MS_TAG=$(echo "${UPDATE_INFO}" | jq -r '.name')
elif [[ -z "${MS_TAG}" ]]; then
  UPDATE_INFO=$(curl https://update.code.visualstudio.com/api/update/darwin/stable/lol)
  export MS_COMMIT=$(echo "${UPDATE_INFO}" | jq -r '.version')
  export MS_TAG=$(echo "${UPDATE_INFO}" | jq -r '.name')
else
  reference=$( git ls-remote --tags | grep -x ".*refs\/tags\/${MS_TAG}" | head -1 )

  if [[ -z "${reference}" ]]; then
    echo "The following tag can't be found: ${MS_TAG}"
    exit 1
  elif [[ "${reference}" =~ ^([[:alnum:]]+)[[:space:]]+refs\/tags\/([0-9]+\.[0-9]+\.[0-9]+)$ ]]; then
    export MS_COMMIT="${BASH_REMATCH[1]}"
    export MS_TAG="${BASH_REMATCH[2]}"
  else
    echo "The following reference can't be parsed: ${reference}"
    exit 1
  fi
fi

echo "Got the MS tag: ${MS_TAG} version: ${MS_COMMIT}"

git fetch --depth 1 origin "${MS_COMMIT}"
git checkout FETCH_HEAD

cd ..

# for GH actions
if [[ ${GITHUB_ENV} ]]; then
  echo "MS_TAG=${MS_TAG}" >> "${GITHUB_ENV}"
  echo "MS_COMMIT=${MS_COMMIT}" >> "${GITHUB_ENV}"
fi