#! /bin/sh

# workarea
# Copyright 1984-2016 Cisco Systems, Inc.
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
# http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

if [ $# != 1 -a $# != 2 ]
then
    echo "Usage: workarea <machine-type> { <workarea name> }"
    exit 1
fi

# set M to machine type and W to workarea name
M=$1
if [ "$2" = "" ]
then
    W=$M
else
    W=$2
fi

case "$M" in
  a6fb) ;;
  a6le) ;;
  a6ob) ;;
  a6osx) ;;
  a6nb) ;;
  a6nt) ;;
  a6s2) ;;
  arm32le) ;;
  i3fb) ;;
  i3le) ;;
  i3nb) ;;
  i3nt) ;;
  i3ob) ;;
  i3osx) ;;
  i3qnx) ;;
  i3s2) ;;
  ppc32le) ;;
  ta6fb) ;;
  ta6le) ;;
  ta6nt) ;;
  ta6ob) ;;
  ta6osx) ;;
  ta6nb) ;;
  ta6s2) ;;
  tarm32le) ;;
  ti3fb) ;;
  ti3le) ;;
  ti3nb) ;;
  ti3nt) ;;
  ti3ob) ;;
  ti3osx) ;;
  ti3qnx) ;;
  ti3s2) ;;
  tppc32le) ;;
  *) echo "Unrecognized machine name $M"; exit 1 ;;
esac

# This shell script creates a workarea for local modifications to the
# Chez Scheme source code.  Invoke with the name of a machine type:
# i3le, i3nt, ti3osx, etc., plus an optional workarea name.  The script
# creates a subdirectory in the current working (release) directory.
# If the workarea name argument is not given, this subdirectory is
# named by the machine type.  The workarea contains subdirectories
# that correspond to various subdirectories of the release directory.
# Initially, all of the files in the workarea are links back into the
# source directories.  Furthermore, many of the files are simply make
# files that are used to rebuild the system, and in most cases, the
# make files themselves create links for the source files as needed.
# To make local modifications, convert the links into local copies.

# workln source dest
# creates link if dest does not exist and source does
workln()
{
    if [ ! -e $2 -a -e $1 ] ; then
        /bin/ln -s $1 $2 2> /dev/null
    fi
}

# forceworkln source dest
# attempts to create link even if source does not exist
forceworkln()
{
    if [ ! -e $2 ] ; then
        /bin/ln -s $1 $2 2> /dev/null
    fi
}

# workdir directory-name
workdir()
{
    if [ ! -e $1 ] ; then
        mkdir $1
    fi
}

workdir $W

workdir $W/c
(cd $W/c; workln ../../c/Mf-$M Mf-$M)
(cd $W/c; forceworkln Mf-$M Makefile)
(cd $W/c; workln ../../c/Mf-base Mf-base)
if [ ! -e $W/c/config.h ] ; then
  touch $W/c/config.h
fi
if [ ! -e $W/c/Mf-config ] ; then
  touch $W/c/Mf-config
fi

workdir $W/s
(cd $W/s; workln ../../s/Mf-$M Mf-$M)
(cd $W/s; forceworkln Mf-$M Makefile)
(cd $W/s; workln ../../s/Mf-base Mf-base)
(cd $W/s; workln ../../s/Mf-cross Mf-cross)
(cd $W/s; workln ../../s/$M.def $M.def)
(cd $W/s; forceworkln $M.def machine.def)

workdir $W/mats
(cd $W/mats; workln ../../mats/Mf-$M Mf-$M)
(cd $W/mats; forceworkln Mf-$M Makefile)
(cd $W/mats; workln ../../mats/Mf-base Mf-base)
(cd $W/mats; workln ../../mats/Mf-exobj Mf-exobj)

for dir in `echo examples unicode` ; do
  workdir $W/$dir
  for file in `(cd $dir ; echo *)` ; do
    (cd $W/$dir ; workln ../../$dir/$file $file)
  done
done

# deep copy submodules where builds occur so changes don't propagate through symlinks
for dir in `echo zlib` ; do
  if [ ! -e $W/$dir ] ; then
    /bin/cp -R $dir $W/$dir
  fi
done

workdir $W/boot
workdir $W/boot/$M
(cd $W/boot/$M; workln ../../../boot/$M/scheme.h scheme.h)
(cd $W/boot/$M; workln ../../../boot/$M/equates.h equates.h)
(cd $W/boot/$M; workln ../../../boot/$M/petite.boot petite.boot)
(cd $W/boot/$M; workln ../../../boot/$M/scheme.boot scheme.boot)
(cd $W/boot/$M; workln ../../../boot/$M/def.so def.so)
(cd $W/boot/$M; workln ../../../boot/$M/edit.so edit.so)
(cd $W/boot/$M; workln ../../../boot/$M/fact.so fact.so)
(cd $W/boot/$M; workln ../../../boot/$M/fatfib.so fatfib.so)
(cd $W/boot/$M; workln ../../../boot/$M/fib.so fib.so)
(cd $W/boot/$M; workln ../../../boot/$M/freq.so freq.so)
(cd $W/boot/$M; workln ../../../boot/$M/m4.so m4.so)
(cd $W/boot/$M; workln ../../../boot/$M/macro.so macro.so)
(cd $W/boot/$M; workln ../../../boot/$M/matrix.so matrix.so)
(cd $W/boot/$M; workln ../../../boot/$M/object.so object.so)
(cd $W/boot/$M; workln ../../../boot/$M/power.so power.so)
(cd $W/boot/$M; workln ../../../boot/$M/rabbit.so rabbit.so)
(cd $W/boot/$M; workln ../../../boot/$M/rsa.so rsa.so)
(cd $W/boot/$M; workln ../../../boot/$M/scons.so scons.so)
(cd $W/boot/$M; workln ../../../boot/$M/setof.so setof.so)
(cd $W/boot/$M; workln ../../../boot/$M/unify.so unify.so)
(cd $W/boot/$M; workln ../../../boot/$M/fft.so fft.so)
(cd $W/boot/$M; workln ../../../boot/$M/compat.so compat.so)
case $M in
  *nt)
    (cd $W/boot/$M; workln ../../../boot/$M/mainmd.obj mainmd.obj)
    (cd $W/boot/$M; workln ../../../boot/$M/mainmt.obj mainmt.obj)
    (cd $W/boot/$M; workln ../../../boot/$M/csv941md.lib csv941md.lib)
    (cd $W/boot/$M; workln ../../../boot/$M/csv941mt.lib csv941mt.lib)
    (cd $W/boot/$M; workln ../../../boot/$M/scheme.res scheme.res)
    ;;
  *)
    (cd $W/boot/$M; workln ../../../boot/$M/main.o main.o)
    (cd $W/boot/$M; workln ../../../boot/$M/kernel.o kernel.o)
    ;;
esac

workdir $W/bin
workdir $W/bin/$M
case $M in
  *nt)
    (cd $W/bin/$M; workln ../../../bin/$M/scheme.exe scheme.exe)
    (cd $W/bin/$M; forceworkln scheme.exe petite.exe)
    (cd $W/bin/$M; workln ../../../bin/$M/csv941.dll csv941.dll)
    (cd $W/bin/$M; workln ../../../bin/$M/csv941.lib csv941.lib)
    ;;
  *)
    (cd $W/bin/$M; workln ../../../bin/$M/scheme scheme)
    (cd $W/bin/$M; forceworkln scheme petite)
    ;;
esac

# crutch links for fingers that remember old release structure
case $M in
  *nt)
    (cd $W/bin; forceworkln $M/scheme.exe scheme.exe)
    (cd $W/bin; forceworkln $M/petite.exe petite.exe)
    (cd $W/bin; forceworkln $M/csv941.dll csv941.dll)
    ;;
  *)
    (cd $W/bin; forceworkln $M/scheme scheme)
    (cd $W/bin; forceworkln $M/petite petite)
    ;;
esac

(cd $W; workln ../LOG LOG)
(cd $W; forceworkln ../nanopass nanopass)
(cd $W; workln ../makefiles/installsh installsh)
(cd $W; workln ../scheme.1.in scheme.1.in)

case $M in
  *nt)
    (cd $W/c; make source > /dev/null 2>&1)
    (cd $W/s; make source > /dev/null 2>&1)
    (cd $W/mats; make source > /dev/null 2>&1)
    ;;
esac

exit 0
