common

#!/usr/bin/env bash

# Wrapper for the published dotc/dotr script that check for file changes
# and use sbt to re build the compiler as needed.

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" >& /dev/null && pwd)/.."

target="$1"

shift # Mutates $@ by deleting the first element ($1)

# set the $DIST_PROJECT and $DIST_DIR variables
source "$ROOT/bin/common-platform"

# Marker file used to obtain the date of latest call to sbt-back
version="$ROOT/$DIST_DIR/target/universal/stage/VERSION"

# Create the target if absent or if file changed in ROOT/compiler
new_files="$(find "$ROOT/compiler" \( -iname "*.scala" -o -iname "*.java" \) -newer "$version" 2> /dev/null)"

if [ ! -f "$version" ] || [ ! -z "$new_files" ]; then
  echo "Building Dotty..."
  (cd $ROOT && sbt "$DIST_PROJECT/Universal/stage")
fi

"$ROOT/$DIST_DIR/target/universal/stage/bin/$target" "$@"