mscala

mscala

#!/usr/bin/env bash
#
# scala runner which can handle lots of variation automatically
# Paul Phillips <psp@brb.fyi>

set -euo pipefail

declare SCALA2_VERSION="2.13.10"
declare SCALA3_VERSION="3.2.0"
declare AMM_VERSION="2.5.5"

# defaults
declare ARTIFACT="scala-compiler"
declare VERSION="$SCALA2_VERSION"
declare JBIN="java"
declare JCP=""
declare MOPTS="-usejavacp"
declare WHAT="repl"

usage () {
    cat <<EOM
Usage: mscala [-acdhjmrv23] [arg arg ...]
  -a  ammonite repl
  -c  compiler
  -d  debug
  -h  help
  -j  java version
  -m  dependency
  -r  scala repl
  -v  scala version
  -2  scala v2
  -3  scala v3

Examples:
  mscala -2 -r -m net.bytebuddy:byte-buddy:1.12.18   # start scala 2 repl with dep
  mscala -3 -c a.scala                               # compile a.scala with scala 3

EOM
}

crossDependency () {
  local g="$1"
  local a="$2"
  local v="$3"
  local crossv="$VERSION"

  echo "$g:${a}_${crossv}:$v"
}

addDependency () {
  local runner="$(which cs || which coursier)"
  local cp="$("$runner" fetch "$1" | paste -sd: -)"
  if [[ -z $JCP ]]; then
    JCP="$cp"
  else
    JCP="$JCP:$cp"
  fi
}

while getopts :acdhj:m:rv:23 opt; do
    case $opt in
        a) WHAT="amm" ;; # MAIN="$AMM_REPL" ;;
        c) WHAT="compiler" ;; # MAIN="$SCALA_MAIN" ;;
        d) set -x ;;
        h) usage && exit 0 ;;
        j) JBIN="$(java_home -v "$OPTARG")/bin/java" ;;
        m) addDependency "$OPTARG" ;;
        r) WHAT="repl" ;; # MAIN="$SCALA_REPL" ;;
        v) VERSION="$OPTARG" ;;
        2) VERSION="$SCALA2_VERSION" ;;
        3) VERSION="$SCALA3_VERSION" ;;
    esac
done

shift $(( OPTIND-1 ))

if [[ "$WHAT" == amm ]]; then
    addDependency "$(crossDependency com.lihaoyi ammonite $AMM_VERSION)"
    MAIN="ammonite.AmmoniteMain"
    MOPTS=""
else
  # [[ -z "$VERSION" ]] && VERSION="$SCALA3_VERSION"

  [[ $VERSION == "" ]] && VERSION="3"
  [[ $VERSION == "2" ]] && VERSION="2.13"
  [[ $VERSION == "3" ]] && VERSION="3.2"

  [[ $VERSION == "2.10" ]] && VERSION="2.10.7"
  [[ $VERSION == "2.11" ]] && VERSION="2.11.12"
  [[ $VERSION == "2.12" ]] && VERSION="2.12.17"
  [[ $VERSION == "2.13" ]] && VERSION="2.13.10"

  [[ $VERSION == "3.2" ]] && VERSION="3.2.0"

  [[ $VERSION == 3.* ]] && ARTIFACT="scala3-compiler_3"
  # https://stackoverflow.com/questions/56457685/how-to-fix-the-sbt-crash-java-lang-numberformatexception-for-input-string-0x
  [[ $VERSION == 2.11.* ]] && TERM="xterm-color"

  addDependency "org.scala-lang:$ARTIFACT:$VERSION"

  case "$WHAT/${VERSION:0:1}" in
      repl/2)     MAIN="scala.tools.nsc.MainGenericRunner" ;;
      repl/3)     MAIN="dotty.tools.MainGenericRunner" ;;
      compiler/2) MAIN="scala.tools.nsc.Main" ;;
      compiler/3) MAIN="dotty.tools.MainGenericCompiler" ;;
  esac
fi

"$JBIN" -cp "$JCP" "$MAIN" $MOPTS "$@"