#!/bin/bash

# Copyright 2006, 2007, 2008, 2009, 2010, 2012, 2013, 2015, 2018, 2020, 2021  Patrick J. Volkerding, Sebeka, MN, USA
# 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)

PKGNAM=alpine
VERSION=${VERSION:-2.26}
ALPINEBUILD=${ALPINEBUILD:-2}
IMAPDBUILD=${IMAPDBUILD:-1}
PINEPGP=${PINEPGP:-0.18.0}

# By default, do not build the unmaintained and possibly insecure imapd:
BUILD_IMAPD=${BUILD_IMAPD:-NO}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i586 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( 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-$ALPINEBUILD.txz"
  exit 0
fi

# We don't use this below as it breaks the build.
NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

TMP=${TMP:-/tmp}
PKG=$TMP/package-${PKGNAM}
rm -rf $PKG
mkdir -p $PKG/etc

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
fi

cd $TMP
rm -rf alpine-${VERSION}
tar xvf $CWD/alpine-$VERSION.tar.?z || exit 1
cd alpine-$VERSION || exit 1

# Make sure ownerships and permissions are sane:
chown -R root:root .
find . \
 \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 700 -o -perm 555 -o -perm 511 \) \
 -exec chmod 755 {} \+ -o \
 \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
 -exec chmod 644 {} \+

zcat $CWD/alpine.manpage.diff.gz | patch -p1 --verbose || exit 1
zcat $CWD/maildir.patch.gz | patch -p1 --verbose || exit 1

# Configure:
CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --mandir=/usr/man \
  --with-ssl-dir=/usr \
  --with-ssl-certs-dir=/etc/ssl/certs \
  --with-c-client-target=slx \
  --with-system-pinerc=/etc/pine.conf \
  --with-system-fixed-pinerc=/etc/pine.conf.fixed \
  --with-passfile=.alpine.passfile \
  --disable-debug \
  --with-debug-level=0 \
  --without-tcl \
  --program-prefix= \
  --program-suffix= \
  --build=$ARCH-slackware-linux || exit 1

# Correct paths and programs in tech-notes.txt:
( cd doc/tech-notes
  sed -i "s,/usr/local/lib/pine.info,/usr/lib/pine.info,g" tech-notes.txt
  sed -i "s,/usr/local/lib,/etc,g" tech-notes.txt
  sed -i "s,/usr/local,/etc,g" tech-notes.txt
)

# Build and install:
# Since we build non-compliant to RFC3501 we have to answer 'y' half-way:
echo y | make EXTRACFLAGS="-fPIC" SSLTYPE=unix || exit 1

make install SSLTYPE=unix DESTDIR=$PKG || exit 1

# Add default config file:
./alpine/alpine -conf > $PKG/etc/pine.conf.new

# Add a documentation directory:
mkdir -p $PKG/usr/doc/${PKGNAM}-$VERSION
cp -a \
  LICENSE NOTICE README* VERSION \
  doc/tech-notes* doc/brochure.txt doc/mailcap.unx doc/mime.types \
  $PKG/usr/doc/${PKGNAM}-$VERSION

# Add pinepgp support:
cd $TMP
rm -rf pinepgp-$PINEPGP
tar xvf $CWD/pinepgp-$PINEPGP.tar.gz || exit 1
cd pinepgp-$PINEPGP || exit 1
zcat $CWD/pinepgp-${PINEPGP}-makefile-sed-fix.diff.gz | patch -p1 --verbose || exit 1
zcat $CWD/pinepgp.pinegpgp.in.diff.gz | patch -p1 --verbose || exit 1
chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \+ -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \+
./configure --prefix=/usr
make || exit 1
make install DESTDIR=$PKG || exit 1
mkdir -p $PKG/usr/doc/pinepgp-$PINEPGP
cp -a COPYING* README $PKG/usr/doc/pinepgp-$PINEPGP
chmod 644 $PKG/usr/doc/pinepgp-$PINEPGP/*

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

# Compress and link manpages, if any:
if [ -d $PKG/usr/man ]; then
  ( cd $PKG/usr/man
    for manpagedir in $(find . -type d -name "man*") ; do
      ( cd $manpagedir
        for eachpage in $( find . -type l -maxdepth 1) ; do
          ln -s $( readlink $eachpage ).gz $eachpage.gz
          rm $eachpage
        done
        gzip -9 *.*
      )
    done
  )
fi

# Compress info files, if any:
if [ -d $PKG/usr/info ]; then
  ( cd $PKG/usr/info
    rm -f dir
    gzip -9 *
  )
fi

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

cd $PKG
/sbin/makepkg -l y -c n $TMP/${PKGNAM}-$VERSION-$ARCH-$ALPINEBUILD.txz

if [ "$BUILD_IMAPD" = "NO" ]; then
  exit 0
fi

# As is customary, now build a package for the included IMAP and
# POP3 daemons:
PKG2=/tmp/package-imapd
cd $TMP
rm -rf $PKG2
mkdir -p $PKG2
cd alpine-$VERSION/imap || exit 1
mkdir -p $PKG2/usr/doc/imapd-$VERSION
cp -a \
  CONTENTS LICENSE* NOTICE SUPPORT* \
  $PKG2/usr/doc/imapd-$VERSION
cat << EOF > $PKG2/usr/doc/imapd-$VERSION/additional-imap-documentation
Additional documentation for imapd may be found in the alpine
sources in the /imap/docs directory.
EOF
mkdir -p $PKG2/usr/man/man8
for file in src/imapd/imapd.8 src/ipopd/ipopd.8 ; do
  cat $file | gzip -9c > $PKG2/usr/man/man8/`basename $file`.gz
done
mkdir -p $PKG2/usr/sbin
cat imapd/imapd > $PKG2/usr/sbin/imapd
cat ipopd/ipop3d > $PKG2/usr/sbin/ipop3d
chmod 755 $PKG2/usr/sbin/imapd $PKG2/usr/sbin/ipop3d
# Strip binaries:
find $PKG2 | xargs file | grep -e "executable" -e "shared object" \
  | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
# Add slack-desc file:
mkdir -p $PKG2/install
cat $CWD/slack-desc.imapd > $PKG2/install/slack-desc
cd $PKG2
/sbin/makepkg -l y -c n $TMP/imapd-$VERSION-$ARCH-$IMAPDBUILD.txz