checkout

#!/bin/sh -e
get_spongepowered_remote() {
  git remote -v | grep -E 'SpongePowered\/'`basename $(pwd)`'(\.git)? \(fetch\)' | awk -F"\t" '{print $1}'
}

checkout() {
  if git rev-parse $1>/dev/null 2>/dev/null
    then git checkout $1
    else git checkout -b `get_spongepowered_remote`/$1 $1
  fi
}

# $1 should be a pattern containing OUT
# $2, if present, should be the smallest number
get_largest_numbered_branch() {
  x=
  if [ ! -z $2 ]
  then x=$(($2 + 1))
  else x=1
  fi

  remote=`get_spongepowered_remote`
  # Must pipe git branch through grep -e '.*'; git branch does not error when no branches match, but grep does.
  while git branch --list -a $remote/`echo $1 | sed 's/OUT/'$x'/'` | grep -e '.*' > /dev/null
  do x=$((x + 1))
  done
  echo $((x - 1))
}

help() {
  echo "Usage:" > /dev/stderr
  echo "  $0 b - Check out the latest bleeding version" > /dev/stderr
  echo "  $0 s - Check out the latest stable version" > /dev/stderr
  echo "  $0 <major API version> - Check out a specific stable version" > /dev/stderr
  echo "    Example: $0 6" > /dev/stderr
  echo "    Minimum supported version is 5" > /dev/stderr
  exit 1
}

if [ $# -ne 1 ]
then help
elif [ $1 = b ]
then
  echo Fetching all repositories...
  git submodule foreach --recursive git fetch --all --prune
  echo
  echo Checking out bleeding...
  git submodule foreach --recursive git checkout bleeding
elif [ $1 = s ] || [ $(($1)) -gt 4 ] # If it isn't a number, it will resolve to 0, and thus not be checked.
then
  echo Fetching all repositories...
  git submodule foreach --recursive git fetch --all --prune
  echo

  cd SpongeCommon
  major=$1
  if [ $major = s ]
  then
    major=`get_largest_numbered_branch "stable-OUT" 5`
    echo Will check out API version $major in all repositories.
  elif [ $major -lt 5 ]
  then
    help
  elif ! (git branch --list -a `get_spongepowered_remote`/stable-$major | grep -e '.*') > /dev/null
  then
    echo No such API version $major. If you want bleeding, use '"b"' instead. > /dev/stderr
    exit 1
  fi
  echo Checking out SpongeCommon...
  checkout stable-$major
  cd ..
  echo
  echo Checking out SpongeForge...
  cd SpongeForge
  checkout stable-$major
  cd ..
  echo
  echo Checking out SpongeVanilla...
  cd SpongeVanilla
  checkout stable-$major
  cd ..
  echo

  cd SpongeCommon/SpongeAPI
  minor=`get_largest_numbered_branch "stable-$major.OUT.0"`
  patch=`get_largest_numbered_branch "stable-$major.$minor.OUT"`
  echo Checking out SpongeAPI...
  checkout stable-$major.$minor.$patch
  cd ../..
else help
fi
echo
echo Pulling all repositories...
git submodule foreach --recursive git pull