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#!/bin/sh
#
#            TESTEMSCRIPTEN -- TEST THE MPS WITH EMSCRIPTEN
#             Gareth Rees, Ravenbrook Limited, 2014-04-17
#
# $Id: //info.ravenbrook.com/project/mps/master/tool/testemscripten#8 $
# Copyright (c) 2014-2020 Ravenbrook Limited. See end of file for license.
#
#
# 1. INTRODUCTION
#
# This shell script pulls Emscripten from GitHub and uses it to build
# the MPS.
#
# Supported platforms: ?.
#
#
# 1.1. PREREQUISITES
#
# clang, curl, git, nodejs
#
# "python" needs to be Python 2 (otherwise configure fails), so you
# may need to run:
#
#     port select --set python python27
#
# You need to have a program "python2" on your path (which runs Python
# 2.7.3), so on OS X with MacPorts you need to run:
#
#     ln -s /opt/local/bin/python2.7 /opt/local/bin/python2


# 2. CONFIGURATION

# Emscripten git repository
EMSCRIPTEN_REMOTE=https://github.com/kripken/emscripten.git

# Fastcomp git repository
FASTCOMP_REMOTE=https://github.com/kripken/emscripten-fastcomp.git

# Fastcomp clang git repository
CLANG_REMOTE=https://github.com/kripken/emscripten-fastcomp-clang

# Directory to put everything in
TESTDIR="$PWD/.test"
mkdir -p -- "$TESTDIR" &&
    cd -- "$TESTDIR" ||
	exit 1


# 3. UTILITIES

# 3.1. checkout REPO REMOTE -- clone a git repository and pull

checkout () {
    REPO=$1
    REMOTE=$2
    if [ -d "$REPO" ]; then
        echo "$REPO exists: skipping clone."
    else
        echo "cloning $REMOTE into $REPO."
        git clone --recursive -- "$REMOTE" "$REPO"
    fi
    (
        cd -- "$REPO" &&
        git pull
    )
}


# 4. PROCEDURE

checkout emscripten "$EMSCRIPTEN_REMOTE"


# See [FASTCOMP].

checkout emscripten-fastcomp "$FASTCOMP_REMOTE"
(
    cd emscripten-fastcomp &&
    (
        cd tools &&
        checkout clang "$CLANG_REMOTE";
    )
    mkdir -p build
    (
        cd build &&
        ../configure --enable-optimized --disable-assertions --enable-targets=host,js &&
        make;
    )
)


# A. REFERENCES
#
# [EMPSCRIPTEN] "Emscripten SDK"
# <https://github.com/kripken/emscripten/wiki/Emscripten-SDK>
#
# [FASTCOMP] "LLVM Backend, aka fastcomp"
# <https://github.com/kripken/emscripten/wiki/LLVM-Backend>
#
#
# B. DOCUMENT HISTORY
#
# 2014-04-17 GDR Created based on [EMSCRIPTEN] and [FASTCOMP].
# 2020-07-29 PNJ Updated licence.
#
# C. COPYRIGHT AND LICENSE
#
# Copyright (C) 2014-2020 Ravenbrook Limited <https://www.ravenbrook.com/>.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the
#    distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#
# $Id: //info.ravenbrook.com/project/mps/master/tool/testemscripten#8 $