#!/bin/sh

# Slackware build script for mrustc

# Copyright 2017-2018 Andrew Clemons, Wellington New Zealand
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "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 AUTHOR 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.

PRGNAM=mrustc
GITREV=${GITREV:-173dfa9fea9e65ec49fa4def9117b01c0a485ab5}
VERSION=${VERSION:-git$(echo "$GITREV" | sed 's/^\(.\{7\}\).*$/\1/')}
RUSTCVERSION=${RUSTCVERSION:-1.19.0}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

# https://github.com/thepowersgang/mrustc/issues/38#issuecomment-352158861
if [ "$ARCH" != "x86_64" ]; then
  echo "Sorry, mrustc currently only supports x86_64."
  exit 1
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$GITREV
tar xvf $CWD/$PRGNAM-$GITREV.tar.gz
cd $PRGNAM-$GITREV

cp $CWD/rustc-$RUSTCVERSION-src.tar.xz .
sed -i '/curl -sS https:/d' Makefile
sed -i 's/-src.tar.gz/-src.tar.xz/' Makefile

chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

make RUSTCSRC

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
make -f minicargo.mk

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
make -j1 -C run_rustc

mkdir -p $PKG/usr/bin
install -m 0755 bin/mrustc $PKG/usr/bin/mrustc
install -m 0755 tools/bin/minicargo $PKG/usr/bin/minicargo

mkdir -p $PKG/usr/share/mrustc
find output -name '*.hir' -maxdepth 1 -exec install -m 0644 {} $PKG/usr/share/mrustc/ \;

mkdir -p $PKG/usr/lib$LIBDIRSUFFIX/rustlib/$ARCH-unknown-linux-gnu/lib/
cp -a run_rustc/prefix/lib/rustlib/$ARCH-unknown-linux-gnu/lib/* $PKG/usr/lib$LIBDIRSUFFIX/rustlib/$ARCH-unknown-linux-gnu/lib/

install -m 0755 output/rustc $PKG/usr/bin/rustc
install -m 0755 output/cargo $PKG/usr/bin/cargo
install -m 0755 output/rustc-build/rustdoc $PKG/usr/bin/rustdoc

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a \
  LICENCE-MIT README.md \
  $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}