#!/bin/bash

# Slackware build script for netqmail

# Copyright 2017 Duncan Roe, Melbourne, Australia
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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

PRGNAM=netqmail
VERSION=${VERSION:-1.06}
BUILD=${BUILD:-2}
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 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 "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}
DOCDIR=$PKG/usr/doc/$PRGNAM-$VERSION
CHROOT=$TMP/$PRGNAM
DO_CONFIG=${DO_CONFIG:-yes}
MAILDIR=${MAILDIR:-no}
SYMLINK_SERVICE=${SYMLINK_SERVICE:-no}
ADMIN_USER=${ADMIN_USER:-nobody}
INSTALL_USERS=${INSTALL_USERS:-yes}
VERBOSE_ADDCHROOT=${VERBOSE_ADDCHROOT:-yes}
export VERBOSE_ADDCHROOT

# Put here rather than /var/log/setup to keep different build variants
INSTDIR=$DOCDIR/install_scripts

[ "$ARCH" = "x86_64" ] && LIBDIRSUFFIX="64" || LIBDIRSUFFIX=""

# These are the user and group ids allocated by SBo
NOFILES_GROUP=${NOFILES_GROUP:-340}
QMAIL_GROUP=${QMAIL_GROUP:-339}
ALIAS_USER=${ALIAS_USER:-339}
QMAILD_USER=${QMAILD_USER:-340}
QMAILL_USER=${QMAILL_USER:-341}
QMAILP_USER=${QMAILP_USER:-342}
QMAILQ_USER=${QMAILQ_USER:-343}
QMAILR_USER=${QMAILR_USER:-344}
QMAILS_USER=${QMAILS_USER:-345}

# It's an error to request to start qmail w/out specifying an admin user
[ $SYMLINK_SERVICE = no -o $ADMIN_USER != nobody ] ||
  { echo "You must provide an admin user to start qmail"; exit 1; }

# If any users or groups are already configured, use their id instead
for i in nofiles qmail
do
  grep -q ^$i: /etc/group &&
    eval $(echo $i|tr a-z A-Z)_GROUP=$(grep ^$i: /etc/group|cut -f3 -d:)
done
for i in alias qmail{d,l,p,q,r,s}
do
  grep -q ^$i: /etc/passwd &&
    eval $(echo $i|tr a-z A-Z)_USER=$(grep ^$i: /etc/passwd|cut -f3 -d:)
done

set -e

rm -rf $PKG $CHROOT
mkdir -p $INSTDIR $OUTPUT $CHROOT

# Create doinst.sh fragment to add users & groups
# (-r option stops creation of mailboxes)
if [ "$INSTALL_USERS" = yes ]; then
  cat >$INSTDIR/doinst_users <<////
grep -q ^nofiles: /etc/group ||
  groupadd -g $NOFILES_GROUP nofiles
grep -q ^alias: /etc/passwd ||
  useradd -r -g nofiles -d /var/qmail/alias -u $ALIAS_USER -s "" alias
grep -q ^qmaild: /etc/passwd ||
  useradd -r -g nofiles -d /var/qmail -u $QMAILD_USER -s "" qmaild
grep -q ^qmaill: /etc/passwd ||
  useradd -r -g nofiles -d /var/qmail -u $QMAILL_USER -s "" qmaill
grep -q ^qmailp: /etc/passwd ||
  useradd -r -g nofiles -d /var/qmail -u $QMAILP_USER -s "" qmailp
grep -q ^qmail: /etc/group ||
  groupadd -g $QMAIL_GROUP qmail
grep -q ^qmailq: /etc/passwd ||
  useradd -r -g qmail -d /var/qmail -u $QMAILQ_USER -s "" qmailq
grep -q ^qmailr: /etc/passwd ||
  useradd -r -g qmail -d /var/qmail -u $QMAILR_USER -s "" qmailr
grep -q ^qmails: /etc/passwd ||
  useradd -r -g qmail -d /var/qmail -u $QMAILS_USER -s "" qmails
////
else
  cat /dev/null >$INSTDIR/doinst_users
fi

cd $CHROOT
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
cd $PRGNAM-$VERSION
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 {} \;

for i in $CWD/*.patch
do
  cat $i|patch -p0
done

############################################################################
# The build process requires all the qmail users to be registered,         #
# so do it in a chroot to avoid messing with the build system's etc/passwd #
############################################################################

cd $CHROOT
export MKCHROOT_FOR_GCC=yes
mkchroot .

# need make + groff + sed
addchroot . make guile gc libffi libunistring groff sed

# need gcc, kernel headers, flex
addchroot . binutils gcc libmpc kernel-headers flex
# gcc 8.2.0 / glibc-2.28 needs mpfr
addchroot . mpfr

mkdir -p var/qmail

# install the qmail users and groups for chroot
cat >>etc/group <<////
nofiles:x:$NOFILES_GROUP:
qmail:x:$QMAIL_GROUP:
////
cat >>etc/passwd <<////
root:x:0:0::/root:/bin/bash
alias:x:$ALIAS_USER:$NOFILES_GROUP::/var/qmail/alias:/bin/true
qmaild:x:$QMAILD_USER:$NOFILES_GROUP::/var/qmail:/bin/true
qmaill:x:$QMAILL_USER:$NOFILES_GROUP::/var/qmail:/bin/true
qmailp:x:$QMAILP_USER:$NOFILES_GROUP::/var/qmail:/bin/true
qmailq:x:$QMAILQ_USER:$QMAIL_GROUP::/var/qmail:/bin/true
qmailr:x:$QMAILR_USER:$QMAIL_GROUP::/var/qmail:/bin/true
qmails:x:$QMAILS_USER:$QMAIL_GROUP::/var/qmail:/bin/true
////

# Set up the commands to run in the chroot jail
cat >commands <<////
cd /$PRGNAM-$VERSION
make
make setup check
////

# Run the chroot commands
chroot . /bin/sh /commands

rm -r var/qmail/man/cat*
mv var/qmail/doc/* $DOCDIR
rmdir var/qmail/doc
mv var/qmail/man $PKG/usr
mv var $PKG

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

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

cat $CWD/$PRGNAM.SlackBuild > $DOCDIR/$PRGNAM.SlackBuild
cp $CHROOT/$PRGNAM-$VERSION/{BLURB*,CHANGES,COPYRIGHT,INTERNALS,README} $DOCDIR

chown -R root: $PKG/usr

mkdir -p $PKG/install
cat $INSTDIR/doinst_users $CWD/doinst_new > $INSTDIR/doinst_sh

###########################################################################
# doinst.sh implements the configure advice in "Life with qmail" (LWQ).   #
# You can skip this step by secifying DO_CONFIG=no on the SlackBuild line #
###########################################################################

if [ $DO_CONFIG = yes ]
then
  # LWQ 2.5.5
  cd $CHROOT/$PRGNAM-$VERSION
  cp config hostname dnsfq dnsip ipmeprint dnsptr $INSTDIR
  cat $CWD/doinst_config >> $INSTDIR/doinst_sh

  # LWQ 2.8.1
  cd $PKG
  cat $CWD/LWQ_scripts/rc > var/qmail/rc
  chmod 755 var/qmail/rc
  mkdir -p var/log/qmail
  [ "$MAILDIR" = no ] && i=./Mailbox || i=./Maildir/
  echo $i > var/qmail/control/defaultdelivery

  # LWQ 2.8.2.1
  cat $CWD/LWQ_scripts/qmailctl-script-dt70 > var/qmail/bin/qmailctl
  chmod 755 var/qmail/bin/qmailctl
  cat $CWD/LWQ_scripts/inst_check > var/qmail/bin/inst_check
  chmod 755 var/qmail/bin/inst_check # LWQ 2.9
  mkdir usr/bin
  ln -s ../../var/qmail/bin/{qmailctl,inst_check} usr/bin

  # LWQ 2.8.2.2
  mkdir -p var/qmail/supervise/qmail-send/log
  mkdir -p var/qmail/supervise/qmail-smtpd/log
  cat $CWD/LWQ_scripts/qmail-send-run > var/qmail/supervise/qmail-send/run
  cat $CWD/LWQ_scripts/qmail-send-log-run \
    > var/qmail/supervise/qmail-send/log/run
  cat $CWD/LWQ_scripts/qmail-smtpd-run > var/qmail/supervise/qmail-smtpd/run
  echo 20 > var/qmail/control/concurrencyincoming
  chmod 644 var/qmail/control/concurrencyincoming
  cat $CWD/LWQ_scripts/qmail-smtpd-log-run \
    > var/qmail/supervise/qmail-smtpd/log/run
  chmod 755 var/qmail/supervise/qmail-send/run
  chmod 755 var/qmail/supervise/qmail-send/log/run
  chmod 755 var/qmail/supervise/qmail-smtpd/run
  chmod 755 var/qmail/supervise/qmail-smtpd/log/run
  mkdir -p var/log/qmail/smtpd
  chown $QMAILL_USER:$NOFILES_GROUP var/log/qmail var/log/qmail/smtpd
  [ $SYMLINK_SERVICE = no ] || cat $CWD/doinst_service >> $INSTDIR/doinst_sh

  # 2.8.3 is done in doinst_config

  # LWQ 2.8.4
  if [ $ADMIN_USER != nobody ]
  then
    echo $ADMIN_USER > var/qmail/alias/.qmail-root
    echo $ADMIN_USER > var/qmail/alias/.qmail-postmaster
    ln -s .qmail-postmaster var/qmail/alias/.qmail-mailer-daemon
    ln -s .qmail-postmaster var/qmail/alias/.qmail-abuse
    chmod 644 var/qmail/alias/.qmail-root var/qmail/alias/.qmail-postmaster
  fi
fi

# qmail installer likes to put a sendmail symlink in /usr/lib
mkdir -p $PKG/usr/lib

# symlink useful programs to usr/bin
mkdir -p $PKG/usr/bin
ln -s ../../var/qmail/bin/maildirmake $PKG/usr/bin

# Distribute the installer test suite
mkdir $INSTDIR/tests
cp $CWD/tests/{README,makechroot} $INSTDIR/tests/
chown -R root: $INSTDIR/tests

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

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