amber/nodejs/jtalkc

#!/bin/bash
#
# This is a "compiler" for JTalk code. Run without arguments for help.

# Get JTalk root directory from the location of this script.
JTALK=`dirname ${0}`/..

function usage {
	cat <<ENDOFHELP
Usage: $0 [-N|D] [-K|C] [-m class] [-M file] [-i file] [-I] [-r] file1 file2 ... file3 Program

   Will compile Jtalk programs in a variety of ways.
   Files listed will be handled using these rules:

     *.js files are concatenated as is. If not found we look in $JTALK/js

     *.st files are compiled into .js files. If not found we look in $JTALK/st.
     Each file is currently considered to be a fileout of a single class
     category of the same name as the file.

  -N or -D
     Compile for Node.js or D8 (V8 shell). Defaults to "-KIm Main" so boot.js and Kernel.js
     are added first and init.js is added last with a call to Main class>>main.

  -K
     Add libraries to get minimal JTalk Kernel running. Implies -i.

  -C
     Add libraries to get minimal JTalk Compiler running. Implies -i.

  -I
     Add library standard initializer $JTALK/js/init.js

  -i file
     Add library initializer <file>.

  -M file
     Add javascript file <file> last acting as main.

  -m class
     Add call to #main in class <class>. 


     Example invocations:

     Compile Kernel.st to Kernel.js:

        jtalkc Kernel.st

     Compile Hello.st to Hello.js and create complete program called
     Hello-all.js for Node.js including boot.js, Kernel.js, init.js and
     adding a call to class method #main in class Hello:

        jtalkc -N Hello.st

     Compile two different class categories into corresponding .js files,
     and manually link with specific boot.js, Kernel.js, init.js and main.js
     and create complete program called Program.js:

        jtalkc boot.js Kernel.js CategoryOne.st CategoryTwo.st init.js main.js Program
ENDOFHELP
	exit 1;
}


# Define our predefined library combinations
BOOT="$JTALK/js/boot.js"
KERNEL="$BOOT $JTALK/js/Kernel.js"
COMPILER="$KERNEL $JTALK/js/Parser.js $JTALK/js/Compiler.js"

# Predefined initializer
INITIALIZER="$JTALK/js/init.js"

# Default values
ENV=
INIT=
MAIN=
MAINFILE=
BASE=$KERNEL
OURCOMPILER="$COMPILER $JTALK/js/init.js $JTALK/nodejs/nodecompile.js"

# Read options and shift them away
while getopts "NDKCIi:M:m:r" o; do
case "$o" in
   N) ENV=NODE
      BASE=$KERNEL
      INIT=$INITIALIZER
      ADDMAIN=Main;;
   D) ENV=D8
      BASE=$KERNEL
      INIT=$INITIALIZER
      ADDMAIN=Main;;
   K) BASE=$KERNEL;;
   C) BASE=$COMPILER;;
   I) INIT=$INITIALIZER;;
   i) INIT=$OPTARG;;
   M) MAINFILE=$OPTARG;;
   m) MAIN=$OPTARG;;
   h) usage;;
   [?])  usage;;
   esac
done
shift $(($OPTIND - 1))

# Combine supplied libraries
LIBS="$BASE $ADDONS"

# Get a unique tempdir and make it get auto removed on exit
TMPDIR=`mktemp -d`
trap "rm -rf $TMPDIR" EXIT

# --------------------------------------------------
# Collect libraries and Smalltalk files looking
# both locally and in $JTALK/js and $JTALK/st 
# --------------------------------------------------
until [ "$*" = "" ]
do
  case $1 in
     *.st)
        CATEGORY=`basename $1 .st`
        if [ -f "$1" ]; then
           COMPILE="$COMPILE $1 $CATEGORY"
           COMPILED="$COMPILED $CATEGORY.js"
        else
           if [ -f $JTALK/st/$1 ]; then
             COMPILE="$COMPILE $JTALK/st/$1 $CATEGORY"
             COMPILED="$COMPILED $CATEGORY.js"
           else
             echo "JTalk file not found: $1"
             exit 1
           fi
        fi
        ;;

     *.js)
        if [ -f "$1" ]; then
           LIBS="$LIBS $1" 
        else
           if [ -f $JTALK/js/$1 ]; then
             LIBS="$LIBS $JTALK/js/$1"
           else
             echo "Javascript file not found: $1"
             exit 1
           fi
        fi
        ;;
  esac
  # Will end up being the last argument
  PROGRAM=$1
  shift
done

# --------------------------------------------------
# Actual compilation phase of collected .st files
# --------------------------------------------------

# Create compiler dynamically
cat $OURCOMPILER > $TMPDIR/compiler.js

# Compile all collected .st files to .js
echo "Compiling ..."
node $TMPDIR/compiler.js $COMPILE

# Verify all .js files corresponding to .st files were created, otherwise exit
IFS=" "
for FILE in $COMPILED
do
  if [ ! -f "$FILE" ]; then
    echo "Failed compilation of $FILE, exiting."
    exit 1
  fi 
done

# --------------------------------------------------
# Now we start composing resulting javascript file.
# --------------------------------------------------

# Add collected libraries to libs.js file.
if [ ! -z "$LIBS" ]; then
  echo "Adding libraries $LIBS ..."
  cat $LIBS > $TMPDIR/libs.js
  LIBS=$TMPDIR/libs.js
fi

echo "Adding Jtalk code$COMPILED ..."

# Check for init file
if [ ! -z "$INIT" ]; then
   if [ -f "$INIT" ]; then
      echo "Adding initializer $INIT ..."
   else
      echo "Can not find init file $INIT, exiting."
      exit 1
   fi 
fi

# Check for adding main
if [ ! -z "$MAIN" ]; then
  echo "Adding call to $MAIN class >> main ..."
  echo "smalltalk.$MAIN._main()" > $TMPDIR/main.js
  MAIN=$TMPDIR/main.js
fi

# Check for adding main file
if [ ! -z "$MAINFILE" ]; then
   if [ -f "$MAINFILE" ]; then
      echo "Adding main as $MAINFILE ..."
   else
      echo "Can not find main file $MAINFILE, exiting."
      exit 1
   fi 
   MAIN=$MAINFILE
fi

# And finally concatenate Program.js
echo "Writing $PROGRAM.js ..."
cat $LIBS $COMPILED $INIT $MAIN > $PROGRAM.js
echo "Done."

# Optionally run Program and give all args left to it
if [ -n "$RUN" ]; then
  echo "Running program"
  echo "---------------"
  node $PROGRAM.js $@
fi