#!/bin/bash

# Slackware build script for csh

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

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

# 20230919 bkw:
# - update for v20230828_1 (sync with Debian sid).
# - remove old no-longer-needed bufsiz.diff and glibc-2.32-sys_siglist.diff.
# - add timespec.diff to work around breakage in csh's time builtin.
# - add remove_publib_dep.diff to avoid an external publib dependency.
# - update csh.login a bit (new csh has a different default $prompt).
# - mention bad profile scripts in README_Slackware.txt.
# - fix the man page slightly.

# 20220409 bkw: BUILD=2
# - fix doinst.sh: only create bin/csh symlink if bin exists, which
#   fixes installing the package with 'installpkg -root /some/path'.

# 20210827 bkw:
# - update to latest debian patch (6), add deb version to VERSION.
# - add -current fix for recent glibc.

# 20170621 bkw:
# - update to latest debian patch (-2.2, needed for -current).
# - quit compiling with -Werror (also needed for -current).
# - BUILD=2.

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

PRGNAM=csh
VERSION=${VERSION:-20230828_1}
BUILD=${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

MAINVER="${VERSION%_*}"  # 123_4 => 123
DEBVER="${VERSION#*_}"   # 123_4 => 4

# Grr.
TARNAM="${PRGNAM}_${MAINVER}.orig"
DIRNAM="${PRGNAM}-${MAINVER}"

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $DIRNAM
tar xvf $CWD/$TARNAM.tar.xz
cd $DIRNAM
tar xvf $CWD/${PRGNAM}_${MAINVER}-$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 all of Debian's patches.
for diff in $( cat debian/patches/series ); do
  patch -p1 < debian/patches/$diff
done

# 20230919 bkw: My own patch. Provides an implementations of
# xrealloc(), and replaces xfree() with free(), so we don't have
# publib as a dependency.
patch -p1 < $CWD/remove_publib_dep.diff

# 20230919 bkw: My own patch. Fixes the mess caused by debian's
# bsd_time.patch. We need the patch, but it introduces a bug where a
# 'struct timeval' pointer is treated as a 'struct timespec' pointer,
# leading to a broken time builtin.
# This isn't *just* here to fix a compiler warning! Without this
# patch, we get:
# % time sleep 2.3
# 0.0u 0.0s 0:02.99 0.0% 0+0k 0+0io 0pf+0w
# ...it thinks a 2.3 second sleep took 2.99 sec. Sometimes this
# will print as 0:02:00 instead (also wrong). With the patch:
# % time sleep 2.3
# 0.0u 0.0s 0:02.30 0.0% 0+0k 0+0io 0pf+0w
# This wasn't an issue in the previous (20110502_6) version.
patch -p1 < $CWD/timespec.diff

# 20230919 bkw: Missing prototype for closefrom(). We don't want
# to #include <bsd/unistd.h> to get it, so just prepend it. This
# probably didn't cause a problem anyway.
sed -i '1ivoid closefrom(int lowfd);' misc.c

# use Slackware standard flags.
# 20230919 bkw: _VIS thing just silences a meaningless warning. it's
# meaningless because it only applies to strnvis() and strnunvis(),
# neither of which is called by csh.
sed -i "1iCFLAGS=$SLKCFLAGS -fcommon -DLIBBSD_OPENBSD_VIS" Makefile

# The LIBC= isn't even used, but Slackware64's pmake is broken: it has
# /usr/lib/libc.a hard-coded, and pmake wants to build that (and can't),
# even though the csh binary is dynamic and doesn't even need libc.a!
# Also don't know why I have to make const.h separately, but it works.
pmake const.h NOGCCERROR=1
pmake LIBC=/usr/lib$LIBDIRSUFFIX/libc.a NOGCCERROR=1
cd USD.doc
pmake paper.ps paper.txt
cd -

# 20230919 bkw: word length is BUFSIZ (by default in 20230828_1, no
# patching required). This is 8192 bytes on x86 and x86_64, so fix
# the man page.
sed -i '/Words can be no/s,1024,8192,' csh.1

# I think this is the first time I've ever seen 'make install' gzip the
# man pages and strip the binary! BSD FTW!
mkdir -p $PKG/usr/bin $PKG/usr/man/man1
pmake install DESTDIR=$PKG BINDIR=/usr/bin MANDIR=/usr/man

# Technically this conflicts with Slackware's etc package, but the file
# that's modified still works exactly the same with tcsh. Also it's a .new
# config file, requires manual intervention.
mkdir -p $PKG/etc
cat $CWD/csh.login > $PKG/etc/csh.login.new

PKGDOC=$PKG/usr/doc/$PRGNAM-$VERSION
mkdir -p $PKGDOC
cp -a USD.doc/paper.* $PKGDOC
cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$PRGNAM.SlackBuild
cat $CWD/README_Slackware.txt > $PKGDOC/README_Slackware.txt

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

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