name: 'Build Git Cache'
description: 'Runs a gclient sync to build the git cache for Electron'
inputs:
  target-platform:
    description: 'Target platform, should be linux, win, macos'    
runs:
  using: "composite"
  steps:
  - name: Set GIT_CACHE_PATH to make gclient to use the cache
    shell: bash
    run: |
      echo "GIT_CACHE_PATH=$(pwd)/git-cache" >> $GITHUB_ENV
  - name: Set Chromium Git Cookie
    uses: ./src/electron/.github/actions/set-chromium-cookie
  - name: Install Build Tools
    uses: ./src/electron/.github/actions/install-build-tools
  - name: Set up cache drive
    shell: bash
    run: |
      if [ "${{ inputs.target-platform }}" = "win" ]; then
        echo "CACHE_DRIVE=/mnt/win-cache" >> $GITHUB_ENV
      else
        echo "CACHE_DRIVE=/mnt/cross-instance-cache" >> $GITHUB_ENV
      fi
  - name: Check cross instance cache disk space
    shell: bash
    run: |    
      # if there is less than 35 GB free space then creating the cache might fail so exit early
      freespace=`df -m $CACHE_DRIVE | grep -w $CACHE_DRIVE | awk '{print $4}'`
      freespace_human=`df -h $CACHE_DRIVE | grep -w $CACHE_DRIVE | awk '{print $4}'`
      if [ $freespace -le 35000 ]; then
        echo "The cross mount cache has $freespace_human free space which is not enough - exiting"
        exit 1
      else
        echo "The cross mount cache has $freespace_human free space - continuing"
      fi
  - name: Restore gitcache
    shell: bash
    run: |
      GIT_CACHE_TAR="$CACHE_DRIVE/gitcache.tar"
      if [ ! -f "$GIT_CACHE_TAR" ]; then
        echo "Git cache tar file does not exist, skipping restore"
        exit 0
      fi
      echo "Restoring git cache from $GIT_CACHE_TAR to $GIT_CACHE_PATH"
      mkdir -p $GIT_CACHE_PATH
      tar -xf $GIT_CACHE_TAR -C $GIT_CACHE_PATH
  - name: Gclient Sync
    shell: bash
    run: |
      e d gclient config \
        --name "src/electron" \
        --unmanaged \
        ${GCLIENT_EXTRA_ARGS} \
        "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY"

      if [ "$TARGET_OS" != "" ]; then
        echo "target_os=['$TARGET_OS']" >> ./.gclient
      fi

      ELECTRON_USE_THREE_WAY_MERGE_FOR_PATCHES=1 e d gclient sync --with_branch_heads --with_tags --nohooks -vv 
  - name: Compress Git Cache Directory
    shell: bash
    run: |
      echo "Uncompressed gitcache size: $(du -sh $GIT_CACHE_PATH | cut -f1 -d' ')"
      cd $GIT_CACHE_PATH
      tar -cf ../gitcache.tar .
      cd ..
      echo "Compressed gitcache to $(du -sh gitcache.tar | cut -f1 -d' ')"
      # remove the old cache file if it exists 
      if [ -f $CACHE_DRIVE/gitcache.tar ]; then
        echo "Removing old gitcache.tar from $CACHE_DRIVE"
        rm $CACHE_DRIVE/gitcache.tar
      fi      
      cp ./gitcache.tar $CACHE_DRIVE/
  - name: Wait for active SSH sessions
    shell: bash
    if: always() && !cancelled()
    run: |
      while [ -f /var/.ssh-lock ]
      do
        sleep 60
      done