#!/usr/bin/env bash
# get base dir regardless of execution location
SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
  DIR="$(cd -P "$(dirname "$SOURCE")" && pwd)"
  SOURCE="$(readlink "$SOURCE")"
  [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
done
. "$(dirname "$SOURCE")/init.sh"

PS1="$"
echo "Rebuilding patch files from current fork state..."
function savePatches() {
  what=$1
  cd "$basedir"/"$what"/ || exit

  mkdir -p "$basedir"/patches/"$2"
  if [ -d ".git/rebase-apply" ]; then
    # in middle of a rebase, be smarter
    echo "REBASE DETECTED - PARTIAL SAVE"
    last=$(cat ".git/rebase-apply/last")
    next=$(cat ".git/rebase-apply/next")
    declare -a files=("$basedir/patches/$2/"*.patch)
    for i in $(seq -f "%04g" 1 1 "$last"); do
      if [ "$i" -lt "$next" ]; then
        rm "${files[$(("$i" - 1))]}"
      fi
    done
  else
    rm "$basedir"/patches/"$2"/*.patch
  fi

  git format-patch --no-signature --zero-commit --no-stat -N -o "$basedir"/patches/"$2" upstream/upstream
  cd "$basedir" || exit
  git add -A "$basedir"/patches/"$2"
  cleanupPatches "$basedir"/patches/"$2"/
  echo "  Patches saved for $what to patches/$2"
}

savePatches Purpur-API api
savePatches Purpur-Server server