#!/bin/bash

# Slackware build script for ircII

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

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

# I don't know why nobody's already done a SlackBuild for this.
# Normally I prefer all-lowercase package names, but this just looks
# *wrong* as "ircii".

# 20210913 bkw:
# - update for v20210616. The datestamp comes from the output of
#   "ircII -v" (not the ChangeLog).
# - change DEFSRV to irc.libera.chat, now that freenode is a wasteland.
# - use a private libexec/ircII dir instead of binaries in /usr/libexec.
#   done because some other ircII-based client might conflict someday.
# - generate and include HTML docs.
# - add NOTES_TO_SELF to avoid cluttering up the script with comments.
# - correct and expand Debian's man pages.
# - add support for 'paranoid mode'.
# - have slack-desc show default server and paranoid mode.

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

PRGNAM=ircII
VERSION=${VERSION:-20210616_2}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

SRCNAM=${PRGNAM,,}
SRCVER=${VERSION%_*}

# We're applying Debian's patches against a slightly older version.
DEBSRCVER=20210328
DEBVER=${VERSION#*_}

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

PARANOID="${PARANOID:-no}"
case "$PARANOID" in
  y*|Y*|t*|T*|1) para_opt="--with-paranoid" ;;
  *)             para_opt="--without-paranoid" ;;
esac
echo "=== PARANOID='$PARANOID', para_opt='$para_opt'"

DEFSRV="${DEFSRV:-SSLIRC/irc.libera.chat:6697}"
case "$DEFSRV" in
  none|NONE) ;;
  *:*) srvopt="--with-default-server=$DEFSRV" ;;
  *) echo "$0: invalid DEFSRV, use host:port, SSLIRC/host:port, or 'none'" 1>&2
     exit 1 ;;
esac

echo "=== DEFSRV='$DEFSRV', srvopt='$srvopt'"

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $SRCNAM
tar xvf $CWD/$SRCNAM-$SRCVER.tar.bz2
cd $SRCNAM
tar xvf $CWD/${SRCNAM}_$DEBSRCVER-$DEBVER.debian.tar.xz
chown -R root:root .
find -L .  -perm /111 -a \! -perm 755 -a -exec chmod 755 {} \+ -o \
        \! -perm /111 -a \! -perm 644 -a -exec chmod 644 {} \+

# apply most of Debian's patches, except:
# - the absolute-path patch would move the nonexistent
#   /usr/share/irc/ircII.{motd,servers} to /etc/irc/{motd,servers}.
#   Since we don't ship either file, and their paths are settable in
#   ~/.ircrc anyway, I see no use for this patch.
# - the Add-ioption patch is meant to fix some compile warnings that we
#   don't actually get. Plus, it won't apply cleanly.
rm -f debian/patches/0004-absolute-path* \
      debian/patches/0003-Add-ioption*

for i in $( cat debian/patches/series ); do
  [ -e debian/patches/$i ] && patch -p1 < debian/patches/$i
done

# fix warnings caused by missing includes.
sed -i -e '1i#include <curses.h>' \
       -e '1i#include <term.h>' \
       source/term.c

# do not compile with termcap. there's no --disable-termcap or similar,
# have to do surgery.
sed -i -e '/AC_CHECK_LIB(termcap/s,termcap,ncurses,g' \
       -e 's,termcap\.h ,,' \
       configure.in

# my own typo/grammar/etc fixes. minor nitpicks, maybe.
patch -p1 < $CWD/manpage.diff

autoreconf -ifv

# is there a disadvantage to enabling emacs meta keys?
# 20210913 bkw: force --with-openssl, rather than letting it
# autodetect. this is so we can find out right away if Slackware's
# openssl gets upgraded to something ircII doesn't yet support.
CFLAGS="$SLKCFLAGS -Wall -Wl,-s" \
./configure \
  $srvopt \
  $para_opt \
  --with-emacs-meta-keys \
  --with-openssl \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --libexecdir=/usr/libexec/$PRGNAM \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --mandir=/usr/man \
  --docdir=/usr/doc/$PRGNAM-$VERSION \
  --build=$ARCH-slackware-linux

make

# make install doesn't create this dir, and doesn't respect DESTDIR
# for the man dir.
mkdir -p $PKG/usr/man/man1
make install DESTDIR=$PKG mandir=$PKG/usr/man/man1

# package called ircII, so let's have an ircII executable.
ln -s $(basename $(realpath $PKG/usr/bin/irc)) $PKG/usr/bin/$PRGNAM

rm -f $PKG/usr/man/man1/irc.1
gzip -9 $PKG/usr/man/man1/*.1
ln -s ircII.1.gz $PKG/usr/man/man1/irc.1.gz

# Debian includes some extra man pages. I've expanded them a bit and
# fixed some typos.
for i in $CWD/man/*.1; do
  sed "s,@VERSION@,$VERSION,g" < $i | \
    gzip -9c > $PKG/usr/man/man1/$( basename $i ).gz
done

# HTML docs (generated from /help text). Sure, why not?
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION/html
perl doc/help2html.pl $PKG/usr/share/irc/help $PKG/usr/doc/$PRGNAM-$VERSION/html

rm -f doc/*.1 doc/*.spec* doc/*.orig doc/*.pl
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a ChangeLog NEWS README doc/* contrib $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
sed -e "s,@para_opt@,$para_opt," \
    -e "s,@srvopt@,$srvopt," \
    < $CWD/slack-desc \
    > $PKG/install/slack-desc

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