#!/bin/sh
 
# Slackware build script for google-go-lang

# Written by Eric Schultz eric at schultzter.ca
# Taken over by Vincent Batts vbatts@hashbangbash.com
# Adapted to slacky's standard by miklos < ardutu at gmail dot com >

# Copyright (c) 2012 Eric Schultz
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

set -e

# Basic information.
PKGNAME=google-go-lang
SRCNAME=go
VERSION=${VERSION:-1.1.2}
BUILD=${BUILD:-2}
TAG=${TAG:-sl}
ARCH=${ARCH:-x86_64}
SOURCE="https://go.googlecode.com/files/${SRCNAME}${VERSION}.src.tar.gz"
TAR=      # empty = auto
DIR="go"
DOCS="AUTHORS CONTRIBUTORS LICENSE PATENTS README VERSION "
SLKFILES="" # all files needed to the slackbuild (except slack-desc etc..)

RELEASE=${RELEASE:-linux}

# An EULA for non-free packages
if [ -e EULA.TXT ];then
  more EULA.TXT
  echo "Do you accept terms? (yes/[no])":
  read ACCEPT
  if [ "$ACCEPT" != "yes" ];then
    echo; echo "SlackBuild Aborted!!"
    exit 1
  fi
fi

# Does not touch following if not needed
JOBS=${JOBS:--j2}
CWD=$(pwd)
TMP=${TMP:-/tmp/buildpkgs/$PKGNAME}
PKG=$TMP/package-$PKGNAME
OUTPUT=${OUTPUT:-$CWD}
TAR=${TAR:-$(basename $SOURCE)}
DIR=${DIR:-$(echo "$TAR"|sed -r 's/(\.tar|)(.gz|.bz2|.xz|)$//')}
 
if [ ! -e "$CWD/$TAR" ];then
  wget "$SOURCE" -O "$CWD/$TAR"
fi
 
CHOST="i486"
if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
  GARCH="386"
elif [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
  GARCH="386"
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
  GARCH="386"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
  CHOST="x86_64"
  GARCH="amd64"
fi

### Preparing Source
rm -rf $TMP
mkdir -p $TMP $PKG/usr/lib${LIBDIRSUFFIX} $OUTPUT
cd $PKG/usr/lib${LIBDIRSUFFIX}
tar xvf $CWD/$TAR
cd $DIR
 
chown -R root:root .
chmod -R u+w,go+r-w,a-s .

export GOSRC="$(pwd)"
export GOROOT="$(pwd)"
export GOROOT_FINAL="/usr/lib${LIBDIRSUFFIX}/go"
export GOOS="linux"
export GOBIN="${GOROOT}/bin"
export GOARCH="${GARCH}"

mkdir -p "${GOBIN}"
cd src

LC_ALL=C \
PATH="$PATH:$GOBIN" \
#./all.bash
./make.bash

cd ..

install -Dm644 misc/bash/go $PKG/etc/bash_completion.d/go

install -Dm644 misc/emacs/go-mode-load.el $PKG/usr/share/emacs/site-lisp/go-mode-load.el
install -Dm644 misc/emacs/go-mode.el $PKG/usr/share/emacs/site-lisp/go-mode.el

install -Dm644 misc/vim/syntax/go.vim $PKG/usr/share/vim/vimfiles/syntax/go.vim
install -Dm644 misc/vim/ftdetect/gofiletype.vim $PKG/usr/share/vim/vimfiles/ftdetect/gofiletype.vim
install -Dm644 misc/vim/ftplugin/go/fmt.vim $PKG/usr/share/vim/vimfiles/ftplugin/go/fmt.vim
install -Dm644 misc/vim/ftplugin/go/import.vim $PKG/usr/share/vim/vimfiles/ftplugin/go/import.vim
install -Dm644 misc/vim/indent/go.vim $PKG/usr/share/vim/vimfiles/indent/go.vim

#mkdir -p misc lib src
mkdir -p $PKG/usr/bin

ln -sf /usr/lib${LIBDIRSUFFIX}/go/bin/go $PKG/usr/bin/go
ln -sf /usr/lib${LIBDIRSUFFIX}/go/bin/godoc $PKG/usr/bin/godoc
ln -sf /usr/lib${LIBDIRSUFFIX}/go/bin/gofmt $PKG/usr/bin/gofmt

ln -sf /usr/lib${LIBDIRSUFFIX}/go/pkg/tool/linux_${GOARCH}/cgo $PKG/usr/bin/cgo
#ln -sf /usr/lib${LIBDIRSUFFIX}/go/pkg/tool/linux_${GOARCH}/ebnflint $PKG/usr/bin/ebnflint

# we'll just check for all of their compilers :-)
for tool in 8a 8c 8g 8l 6a 6c 6g 6l 5a 5c 5g 5l ; do
  if [ -x $PKG/usr/lib${LIBDIRSUFFIX}/go/pkg/tool/linux_${GOARCH}/${tool} ] ; then
    ln -sf /usr/lib${LIBDIRSUFFIX}/go/pkg/tool/linux_${GOARCH}/${tool} $PKG/usr/bin/${tool}
  fi
done

# Put the profile scripts for setting PATH and env variables
mkdir -p $PKG/etc/profile.d
cat > $PKG/etc/profile.d/go.csh.new << EOF
#!/bin/csh
setenv GOOS linux
setenv GOARCH ${GOARCH}
setenv GOROOT /usr/lib${LIBDIRSUFFIX}/go
EOF
cat > $PKG/etc/profile.d/go.sh.new << EOF
#!/bin/sh
export GOOS="linux"
export GOARCH="${GOARCH}"
export GOROOT="/usr/lib${LIBDIRSUFFIX}/go"
EOF

chmod 0755 $PKG/etc/profile.d/go.csh.new
chmod 0755 $PKG/etc/profile.d/go.sh.new

#fix timestamp
find $PKG/usr/lib${LIBDIRSUFFIX}/go/pkg -type f -exec touch '{}' +
find $PKG/usr/lib${LIBDIRSUFFIX}/go/bin -type f -exec touch '{}' +


# Documentations
mkdir -p $PKG/usr/doc/$PKGNAME-$VERSION
cp -r $DOCS $PKG/usr/doc/$PKGNAME-$VERSION
 
mkdir -p $PKG/usr/doc/$PKGNAME-$VERSION/SlackBuild
cd $CWD
for SB in $PKGNAME.SlackBuild slack-desc doinst.sh doinst.sh.gz EULA.TXT $SLKFILES;do
  [ -e $SB ]&&cp -r $SB $PKG/usr/doc/$PKGNAME-$VERSION/SlackBuild/$SB
done

if [ -d $PKG/usr/man ]; then
    ( cd $PKG/usr/man
      find . -type f -exec gzip -9 {} \;
      for i in $( find . -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
    )
fi

if [ -d $PKG/usr/info ]; then
    ( cd $PKG/usr/info
      find . -type f -exec gzip -9 {} \;
      for i in $( find . -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
    )
fi


# Strip binary files
( cd $PKG
  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs -r strip --strip-unneeded 2> /dev/null || true
  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs -r strip --strip-unneeded 2> /dev/null || true
  find . | xargs file | grep "current ar archive" | cut -f 1 -d : | xargs -r strip --strip-unneeded 2> /dev/null || true
)


# Preparing to packaging
mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
[ -e $CWD/doinst.sh ] && cat $CWD/doinst.sh > $PKG/install/doinst.sh
[ -e $CWD/doinst.sh.gz ] && zcat $CWD/doinst.sh.gz > $PKG/install/doinst.sh

cd $PKG
chown -R root:root $PKG
 
if [ -x "$(which requiredbuilder 2>/dev/null)" ];then
  requiredbuilder -y -v -s $CWD $PKG   # add "-c -b" if you have binary files in /usr/share 
  [ -e install/slack-required ]&&cat install/slack-required > $PKG/usr/doc/$PKGNAME-$VERSION/SlackBuild/slack-required
fi

# Packaging
/sbin/makepkg -l y -c n $OUTPUT/$PKGNAME-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-txz}
 
if [ "$1" = "--cleanup" ]; then
  rm -rf $TMP
fi