#!/bin/bash

# Slackware build script for vif

# Written by B. Watson (urchlay@slackware.uk)

# Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.

# Note to self: the actual upstream download file doesn't seem
# to change names (it's "vif-current.tar.gz") when there's a new
# version... but the top-level dir inside the tarball does have the
# version number (e.g. vif-1.2.16/). So I host the tarball myself,
# renamed to match the version number. See getsrc.sh.

cd $(dirname $0) ; CWD=$(pwd)

PRGNAM=vif
VERSION=${VERSION:-1.2.16}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

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

if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

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

set -e

# "make check" doesn't work until after the package has been installed
# (and even then it's checking the installed version, not the binaries
# we just built).
if [ "${CHECK:-no}" = "yes" ]; then
  CHECK=yes

  if [ ! -x /usr/bin/vif ]; then
    CHECK=no
  elif [ "$( /usr/bin/vif -v | head -1 | cut -d' ' -f2 )" != "$VERSION" ]; then
    CHECK=no
  fi

  if [ "$CHECK" = "no" ]; then
    cat <<EOF

To use CHECK=yes, you must first build and install vif without it,
then re-run this script with CHECK=yes.

EOF
    exit 1
  fi
fi

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
cd $PRGNAM-$VERSION
chown -R root:root .
# Some files have +x for no reason, do not revert to template.
find -L .  -type f -a -exec chmod 644 {} + -o \
           -type d -a -exec chmod 755 {} +

LIB=lib$LIBDIRSUFFIX

# Make the man page show the vif version.
sed -i "/\\.Os/s,LINUX,$VERSION," src/man/vif.1

# Upstream hardcodes silent make rules, I need to see the compile
# commands, so...
find . -name Makefile | xargs sed -i '/\$(\(C_COMPILER\|VIF\))/s,@ *,,'

# Can't pass CFLAGS or COPT just for optimization flags...
sed -i "/COPT/s,-O2,$SLKCFLAGS," Makefile

[ "$CHECK" = "yes" ] && make check 2>&1 | tee make_check.log

# The recursive Makefiles can't be parallelized. Using -jN where N>1
# works, but spews "jobserver unavailable" warnings.
# Allowing CC overrides in the env, but this *does not* compile
# with Slack 15.0's clang.
make -j1 C_COMPILER=${CC:-gcc} LOCDIR=/usr

# Do not use 'make install', it doesn't support DESTDIR, and does a
# "make clean" followed by "make all", so we can't use LOCDIR=$PKG/usr
# either (the $PKG would end up hardcoded in the binaries). Also,
# 'make install' uses sudo, which would normally be OK since we run as
# root, but if the local sysadmin has removed root from /etc/sudoers,
# it would break...
mkdir -p $PKG/usr/{bin,$LIB,include,man/man1}
install -s -m0755 src/bin/vif       $PKG/usr/bin
install    -m0644 src/include/vif.h $PKG/usr/include
install    -m0644 src/lib/libvif.a  $PKG/usr/$LIB
gzip -9c < src/man/vif.1 > $PKG/usr/man/man1/vif.1.gz


PKGDOC=$PKG/usr/doc/$PRGNAM-$VERSION
mkdir -p $PKGDOC
cp -a AUTHORS COPYING NEWS README $PKGDOC
[ "$CHECK" = "yes" ] && cp -a make_check.log $PKGDOC
cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$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