#!/bin/bash

# Slackware build script for man-db
# Written by B. Watson (yalhcru@gmail.com)
# Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.

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

PKGNAM=man-db
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.xz | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-2}

MAN2HTML=${MAN2HTML:-20180101}

# 20180115 rworkman:
# Include Thomas Dickey's man2html script

# 20171128 volkerdi:
# Make some changes to the SlackBuild to bring it in line with the usual
# Slackware style, and then pull it into Slackware. Thanks to B. Watson.
# License remains WTFPL, because WTF not :-) I am adding the offical WTFPL
# no warranty disclaimer, however:
#
# /* This program is free software. It comes without any warranty, to
#  * the extent permitted by applicable law. You can redistribute it
#  * and/or modify it under the terms of the Do What The Fuck You Want
#  * To Public License, Version 2, as published by Sam Hocevar. See
#  * http://www.wtfpl.net/ for more details. */
#

# 20170305 bkw:
# - get rid of systemd-specific /usr/lib/tmpfiles.d from package.
# - patch configure so it doesn't write to /usr/lib.

# 20170215 bkw:
# - update for 2.7.6.1 (whoops, last update wasn't for the latest version
# - only update the cache in doinst.sh if it's over an hour old. this
#   takes several minutes, and happens twice (uselessly) if the package
#   is upgraded (since üpgradepkg runs doinst.sh twice). waiting an hour
#   also makes my life easier when I'm testing this script.
# - fix man-db.cron so it works even if USR=yes (whoops), and stop trying
#   to chown the cache to the nonexistent 'man' user.

# 20170125 bkw:
# - update for 2.7.6.
# - add --disable-cache-owner. TODO: revisit this at some
#   point. Maybe create a dedicated 'man' user, or use one of the existing
#   users like 'bin' or 'operator'.

# 20160726 bkw:
# - update for 2.7.5.

# 20150507 bkw:
# - update for 2.7.1.
# - fix homepage in .info file.
# - had to update libpipeline to 1.4.0.

# 20140924 bkw:
# - update for 2.7.0.1, which fixes the clash between man-db's zsoelim
#   and groff's zsoelim.
# - update README and README.Slackware slightly.

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

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

TMP=${TMP:-/tmp}
PKG=$TMP/package-$PKGNAM
OUTPUT=${OUTPUT:-/tmp}

NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "armv7hl" ]; then
  SLKCFLAGS="-O3 -march=armv7-a -mfpu=vfpv3-d16"
  LIBDIRSUFFIX=""
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

# Don't use icecream:
PATH=$(echo $PATH | sed "s|/usr/libexec/icecc/bin||g" | tr -s : | sed "s/^://g" | sed "s/:$//g")

# By default, install binaries to /opt, so as not to stomp on Slackware's
# man pkg. We will have to include a /etc/profile.d script to set PATH,
# MANPATH, etc. Note that only binaries and the man pages for man-db itself
# go to /opt. Everything else (libpipeline, man-db's shared libs, localized
# messages, etc) goes to /usr as usual.

# If you want a proper replacement for Slack's man pkg, build with
# USR="yes", which puts the binaries in the usual places. If your name is
# Patrick V. and you're finally replacing man with man-db in Slackware,
# feel free to uncomment the next line:
# (I actually felt free to strip out support for USR != yes :-)
USR="yes"

BINDIR=/opt/$PKGNAM/bin
[ "${USR:-no}" = "yes" ] && BINDIR=/usr/bin
MANDIR="${BINDIR/bin/man}"

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT

# libpipeline is a pretty niche-market library. It used to be bundled
# in the man-db source, and as far as I can tell, nothing else uses it.
# Instead of making it a separate build and external dep, we'll just
# bundle it here.
LIBNAM=libpipeline
LIBVER=${LIBVER:-$(echo $LIBNAM-*.tar.xz | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}

cd $TMP
rm -rf $LIBNAM-$LIBVER
tar xvf $CWD/$LIBNAM-$LIBVER.tar.xz || exit 1
cd $LIBNAM-$LIBVER || exit 1
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 {} \;

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --mandir=/usr/man \
  --docdir=/usr/doc/$PKGNAM-$VERSION/$LIBNAM-$LIBVER \
  --build=$ARCH-slackware-linux || exit 1
 
make $NUMJOBS || make || exit 1
make install-strip DESTDIR=$PKG || exit 1

mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION/$LIBNAM-$LIBVER
cp -a COPYING* ChangeLog NEWS* README* TODO* \
  $PKG/usr/doc/$PKGNAM-$VERSION/$LIBNAM-$LIBVER

# now build man-db itself, using the libpipeline installed in $PKG
cd $TMP
rm -rf $PKGNAM-$VERSION
tar xvf $CWD/$PKGNAM-$VERSION.tar.xz || exit 1
cd $PKGNAM-$VERSION || exit 1

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 {} \;

# The 'checking for long filenames' test in the configure script writes to
# /usr/lib, which is bad behaviour for a configure script. Not to mention
# wrong (it assumes configure is always being run as root). We already
# know we have long filename support, because we live in the 21st century
# now, so this patch gets rid of the test and force-enables it.
zcat $CWD/dont_write_in_usr.diff.gz | patch -p1 --verbose || exit 1

# The circumlocutions below are needed because doing it the sane way:
# libpipeline_LIBS="-L$PKG/usr/lib$LIBDIRSUFFIX -lpipeline"
# gets broken by libtool (it *insists* on replacing -lpipeline with
# /usr/lib64/libpipeline.so, which will fail if it's an older version).
LD_LIBRARY_PATH="$PKG/usr/lib$LIBDIRSUFFIX" \
LDFLAGS="$PKG/usr/lib$LIBDIRSUFFIX/libpipeline.so" \
libpipeline_CFLAGS="-I$PKG/usr/include" \
libpipeline_LIBS="-L$PKG/usr/lib$LIBDIRSUFFIX $PKG/usr/lib$LIBDIRSUFFIX/libpipeline.so" \
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --disable-setuid \
  --disable-cache-owner \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --mandir=$MANDIR \
  --bindir=$BINDIR \
  --sbindir=${BINDIR/bin/sbin} \
  --docdir=/usr/doc/$PKGNAM-$VERSION \
  --build=$ARCH-slackware-linux || exit 1

make $NUMJOBS || make || exit 1
make install-strip DESTDIR=$PKG || exit 1

# Add man2html
( cd $PKG/usr/bin
  tar --strip-components=1 -xvf $CWD/other-scripts-${MAN2HTML}.tar.?z \
    other-scripts-${MAN2HTML}/man2html
  chown root:root man2html
  chmod 755 man2html
)

# Don't ship .la files:
rm -f $PKG/usr/lib${LIBDIRSUFFIX}/*.la $PKG/usr/lib${LIBDIRSUFFIX}/man-db/*.la

# This stuff is for systemd, we don't need it (and it might confuse
# people coming from systemd distros):
rm -rf $PKG/usr/lib/tmpfiles.d/

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

# no special ownership or perms needed here since we --disable-setuid
mkdir -p $PKG/var/cache/man

# only ship a daily cronjob, don't need a weekly one like Debian has.
mkdir -p $PKG/etc/cron.daily
install -m0755 -oroot -groot $CWD/$PKGNAM.cron $PKG/etc/cron.daily/$PKGNAM

# modified default config, customized for Slackware. See the conf file for
# list of changes.
cat $CWD/man_db.conf.new \
  | sed "s,@LIBDIRSUFFIX@,$LIBDIRSUFFIX,g" \
  > $PKG/etc/man_db.conf.new
# Get rid of any existing file put there by "make install":
rm -rf $PKG/etc/man_db.conf

mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION
cp -a i\
  ChangeLog FAQ* NEWS* README* docs/COPYING* docs/HACKING docs/INSTALL.quick \
  docs/TODO docs/*lsm docs/*example* \
  $PKG/usr/doc/$PKGNAM-$VERSION

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
zcat $CWD/doinst.sh.gz > $PKG/install/doinst.sh

# N.B. the -p option is actually needed here (for libpipeline.so).
cd $PKG
/sbin/makepkg -p -l y -c n $OUTPUT/$PKGNAM-$VERSION-$ARCH-$BUILD.txz