#!/bin/bash

# Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2017, 2018, 2024  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.

# This script was written using the one from slackbuilds.org as a reference,
# so thanks to Adis Nezirovic ( adis _at_ linux.org.ba ) for the original work.

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

PKGNAM=httpd
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.bz2 | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-1_slack15.0}

# 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-$BUILD.txz"
  exit 0
fi

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

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

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS=${SLKCFLAGS:-"-O2"}
  LIBDIRSUFFIX=${LIBDIRSUFFIX:-""}
fi

cd $TMP
rm -rf ${PKGNAM}-${VERSION}
tar xvf $CWD/${PKGNAM}-$VERSION.tar.bz2 || exit 1
cd ${PKGNAM}-$VERSION || exit 1

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

# A brief note about mpms:
#
# "prefork" is the legacy forked mpm, used with mod_php. Starting with httpd 
# 2.4.0, new threaded mpms are available, and previously experimental mpms are
# now stable
#
# Non-threaded mpms are no longer required, since php applications can now be
# deployed with the help of mod_fcgid, essentially a set of fixed dedicated cgi
# processes spawned for the whole purpose of executing dynamic applications
#
# Threaded mpms, by their very nature, are far more scalable than the
# traditional preforking solution. They consume less memory for the same
# workload, when serving the same amount of clients. httpd 2.4 ships with two
# options, "event" and "worker", where the former is the default mpm used if
# none is specified at the ./configure line
#
# Lastly, the "prefork" mpm can be used with mod_php as of version 5.4.0,
# which yields a much improved stability, even with most mod_php extensions
# loaded.
#
# The running mpm can be changed by simply loading the module. Here is a sample:
# LoadModule mpm_event_module lib(64)/httpd/modules/mod_mpm_event.so
#
# When upgrading from 2.2, please make sure to stop the deamon first, or your
# new instance may segfault.

# Fix config.layout to use lib${LIBDIRSUFFIX}:
sed -i -e "s#lib/httpd#lib${LIBDIRSUFFIX}/httpd#" config.layout

# If /var/run becomes a tmpfs or a link to /run, subdirectories could be a problem.
# Just use /var/run rather than /var/run/httpd.
sed -i -e "s#/run/httpd#/run#" config.layout

# Configure:
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --enable-layout=Slackware-FHS \
  --with-apr=/usr \
  --with-apr-util=/usr \
  --enable-mods-shared=all \
  --enable-so \
  --enable-mpms-shared=all \
  --enable-pie \
  --enable-cgi \
  --with-pcre \
  --enable-ssl \
  --enable-http2 \
  --enable-rewrite \
  --enable-vhost-alias \
  --enable-proxy \
  --enable-proxy-http \
  --enable-proxy-http2 \
  --enable-proxy-ftp \
  --enable-cache \
  --enable-mem-cache \
  --enable-file-cache \
  --enable-disk-cache \
  --enable-dav \
  --enable-ldap \
  --enable-authnz-ldap \
  --enable-authn-anon \
  --enable-authn-alias \
  --build=$ARCH-slackware-linux || exit 1

# Build and install:
make $NUMJOBS || make || exit 1
make install DESTDIR=$PKG || exit 1

rmdir $PKG/usr/bin

# Tweak default apache configuration
( cd $PKG
  zcat $CWD/httpd.runasapache.diff.gz | patch -p1 --verbose || exit 1
  # mod_proxy_balancer should be commented out, as otherwise httpd
  # will not start without additional configuration:
  sed -i "s/^LoadModule proxy_balancer_module/#LoadModule proxy_balancer_module/g" $PKG/etc/httpd/httpd.conf
  # This module issues a warning unless some non-default modules are loaded:
  sed -i "s/^LoadModule lbmethod_heartbeat_module/#LoadModule lbmethod_heartbeat_module/g" $PKG/etc/httpd/httpd.conf
  rm -f $PKG/etc/httpd/httpd.conf~ $PKG/etc/httpd/httpd.conf.orig
) || exit 1
# Change config files to .new:
( cd $PKG/etc/httpd
  mv httpd.conf httpd.conf.new
  for file in extra/*; do
    mv $file "${file}.new"
  done
)

cat << EOF >> $PKG/etc/httpd/httpd.conf.new

# Uncomment the following line to enable PHP:
#
#Include /etc/httpd/mod_php.conf

# Uncomment the following lines (and mod_dav above) to enable svn support:
#
#LoadModule dav_svn_module lib${LIBDIRSUFFIX}/httpd/modules/mod_dav_svn.so
#LoadModule authz_svn_module lib${LIBDIRSUFFIX}/httpd/modules/mod_authz_svn.so

EOF

rmdir $PKG/var/log/httpd

mkdir -p $PKG/etc/rc.d
cat $CWD/rc.httpd > $PKG/etc/rc.d/rc.httpd.new

mkdir -p $PKG/etc/logrotate.d
cat $CWD/logrotate.httpd > $PKG/etc/logrotate.d/httpd.new

# Add symlink that letsencrypt wants:
( cd $PKG/usr/sbin
  ln -sf apachectl apache2ctl
)

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

mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION/
cp -a \
  ABOUT_APACHE CHANGES INSTALL LICENSE NOTICE README* ROADMAP VERSIONING \
  $PKG/usr/doc/$PKGNAM-$VERSION

# If there's a CHANGES file, installing at least part of the recent history
# is useful, but don't let it get totally out of control:
if [ -r CHANGES ]; then
  DOCSDIR=$(echo $PKG/usr/doc/${PKGNAM}-$VERSION)
  cat CHANGES | head -n 1000 > $DOCSDIR/CHANGES
  touch -r CHANGES $DOCSDIR/CHANGES
fi

# Other distributions also strip the manual down to just English.
# If this isn't your language of choice, mea culpa.
( cd $PKG/srv/httpd/htdocs/manual
  for file in $(find . -type f -name "*.html") ; do
    if [ -f ${file}.en ]; then
      cp ${file}.en ${file}
      rm -f ${file}.*
    fi
  done
)

# On Slackware, the traditional location for the Apache document root has always
# been "/var/www/htdocs/".  We can avoid an unpleasant surprise for people by
# leaving things where they've always been, and comply with the FHS by providing
# symlinks allowing access through the FHS-approved pathnames.  KDE, for example,
# will look for htdig's htsearch here:  /var/www/cgi-bin/htsearch
mv $PKG/srv/httpd $PKG/var/www

## DISABLED. Don't make these symlinks prior to packaging any more, as it is
## possibly dangerous to an existing document root created in the place where
## these symlinks are normally found. Instead, we make them in the install
## script (only if nothing exists there already)
#( cd $PKG/srv
#  ln -sf /var/www .
#  ln -sf /var/www httpd
#)

# OK, it's just not generally good form to put your web site in /var/www/htdocs,
# but people do it every day.  Like all new .new files, this won't save them this
# time, but if they don't learn their lesson now then it will the next time:
mv $PKG/var/www/htdocs/index.html $PKG/var/www/htdocs/index.html.new

# 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

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