#!/bin/sh
# $Id: mod_authnz_external.SlackBuild,v 1.5 2018/11/04 22:21:25 root Exp root $
# Copyright 2010, 2013, 2018  Eric Hameleers, Eindhoven, NL
# All rights reserved.
#
#   Permission to use, copy, modify, and distribute this software for
#   any purpose with or without fee is hereby granted, provided that
#   the above copyright notice and this permission notice appear in all
#   copies.
#
#   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
#   CONTRIBUTORS 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.
# -----------------------------------------------------------------------------
#
# Slackware SlackBuild script 
# ===========================
# By:         Eric Hameleers <alien@slackware.com>
# For:        mod_authnz_external
# Descr:      Apache External Authentication Module
# URL:        https://github.com/phokz/mod-auth-external
# Needs:      
# Changelog:  
# 3.2.5-1:    12/Nov/2010 by Eric Hameleers <alien@slackware.com>
#             * Initial build.
# 3.3.1-1:    15/oct/2013 by Eric Hameleers <alien@slackware.com>
#             * Update (also with newer pwauth).
# 3.3.2-1:    02/nov/2018 by Eric Hameleers <alien@slackware.com>
#             * Update.
# 
# Run 'sh mod_authnz_external.SlackBuild' to build a Slackware package.
# The package (.tgz) and .txt file as well as build logs are created in /tmp .
# Install it using 'installpkg'. 
#
# -----------------------------------------------------------------------------

# Set initial variables:

PRGNAM=mod_authnz_external
VERSION=${VERSION:-3.3.2}
PWAUTH=${PWAUTH:-2.3.10}
BUILD=${BUILD:-1}
TAG=${TAG:-alien}

# Define the user-ids you want to be able to use pwauth:
SERVER_UIDS=${SERVER_UIDS:-"72,80"} # nobody,apache

DOCS_MOD="AUTHENTICATORS CHANGES INSTALL* README TODO UPGRADE"
DOCS_PWAUTH="CHANGES FORM_AUTH INSTALL README"

# Where do we look for sources?
SRCDIR=$(cd $(dirname $0); pwd)

# Place to build (TMP) package (PKG) and output (OUTPUT) the program:
TMP=${TMP:-/tmp/build}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

SOURCE[0]="$SRCDIR/${PRGNAM}-${VERSION}.tar.gz"
SRCURL[0]="https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/mod-auth-external/${PRGNAM}-${VERSION}.tar.gz"

SOURCE[1]="$SRCDIR/pwauth-${PWAUTH}.tar.gz"
SRCURL[1]="https://github.com/phokz/pwauth/archive/pwauth-${PWAUTH}.tar.gz"

##
## --- with a little luck, you won't have to edit below this point --- ##
##

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$(uname -m)" in
    i?86) ARCH=i586 ;;
    arm*) readelf /usr/bin/file -A | egrep -q "Tag_CPU.*[4,5]" && ARCH=arm || ARCH=armv7hl ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
    *) ARCH=$(uname -m) ;;
  esac
  export ARCH
fi

case "$ARCH" in
  i?86)      SLKCFLAGS="-O2 -march=${ARCH} -mtune=i686"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  x86_64)    SLKCFLAGS="-O2 -fPIC"
             SLKLDFLAGS="-L/usr/lib64"; LIBDIRSUFFIX="64"
             ;;
  armv7hl)   SLKCFLAGS="-O2 -march=armv7-a -mfpu=vfpv3-d16"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  *)         SLKCFLAGS="-O2"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
esac

# Exit the script on errors:
set -e
trap 'echo "$0 FAILED at line ${LINENO}" | tee $OUTPUT/error-${PRGNAM}.log' ERR
# Catch unitialized variables:
set -u
P1=${1:-1}

# Save old umask and set to 0022:
_UMASK_=$(umask)
umask 0022

# Create working directories:
mkdir -p $OUTPUT          # place for the package to be saved
mkdir -p $TMP/tmp-$PRGNAM # location to build the source
mkdir -p $PKG             # place for the package to be built
rm -rf $PKG/*             # always erase old package's contents
rm -rf $TMP/tmp-$PRGNAM/* # remove the remnants of previous build
rm -rf $OUTPUT/{configure,make,install,error,makepkg}-$PRGNAM.log
                          # remove old log files

# Source file availability:
for (( i = 0; i < ${#SOURCE[*]}; i++ )) ; do
  if ! [ -f ${SOURCE[$i]} ]; then
    echo "Source '$(basename ${SOURCE[$i]})' not available yet..."
    # Check if the $SRCDIR is writable at all - if not, download to $OUTPUT
    [ -w "$SRCDIR" ] || SOURCE[$i]="$OUTPUT/$(basename ${SOURCE[$i]})"
    if [ -f ${SOURCE[$i]} ]; then echo "Ah, found it!"; continue; fi
    if ! [ "x${SRCURL[$i]}" == "x" ]; then
      echo "Will download file to $(dirname $SOURCE[$i])"
      wget --no-check-certificate -nv -T 20 -O "${SOURCE[$i]}" "${SRCURL[$i]}" || true
      if [ $? -ne 0 -o ! -s "${SOURCE[$i]}" ]; then
        echo "Fail to download '$(basename ${SOURCE[$i]})'. Aborting the build."
        mv -f "${SOURCE[$i]}" "${SOURCE[$i]}".FAIL
        exit 1
      fi
    else
      echo "File '$(basename ${SOURCE[$i]})' not available. Aborting the build."
      exit 1
    fi
  fi
done

if [ "$P1" == "--download" ]; then
  echo "Download complete."
  exit 0
fi

# --- PACKAGE BUILDING ---

echo "++"
echo "|| $PRGNAM-$VERSION"
echo "++"

cd $TMP/tmp-$PRGNAM
echo "Extracting the source archive(s) for $PRGNAM..."
for (( i = 0; i < ${#SOURCE[*]}; i++ )) ; do
  tar -xvf ${SOURCE[$i]}
done
chown -R root:root *
chmod -R u+w,go+r-w,a+X-s *

# First, pwauth:
( cd pwauth-${PWAUTH}
  sed -i -e "s/SERVER_UIDS .*$/SERVER_UIDS $SERVER_UIDS/" config.h
  make 2>&1 | tee $OUTPUT/make-pwauth.log
) || false

cd ${PRGNAM}-${VERSION}

## A patch is required to compile 3.3.1 against apache 2.4:
#if [ -n "$(/usr/sbin/apachectl -v | grep Apache/2.4)" ]; then
#  cat $SRCDIR/patches/mod_authnz_external_apache-2.4.patch | \
#    patch -p1 --verbose 2>&1 | tee $OUTPUT/patch-%{PRGNAM}.log
#fi

echo Building ...
export LDFLAGS="$SLKLDFLAGS"
export CXXFLAGS="$SLKCFLAGS"
export CFLAGS="$SLKCFLAGS"
apxs -c mod_authnz_external.c 2>&1 | tee $OUTPUT/make-${PRGNAM}.log

# Manually install stuff:
mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}/httpd/modules
install -m755  .libs/mod_authnz_external.so \
  $PKG/usr/lib${LIBDIRSUFFIX}/httpd/modules/mod_authnz_external.so

# Add the pwauth program:
mkdir -p $PKG/usr/libexec
install -m4755 ../pwauth-$PWAUTH/pwauth $PKG/usr/libexec/pwauth

# Add documentation:
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a $DOCS_MOD $PKG/usr/doc/$PRGNAM-$VERSION || true
mkdir $PKG/usr/doc/$PRGNAM-$VERSION/pwauth
( cd ../pwauth-$PWAUTH
  cp -a $DOCS_PWAUTH $PKG/usr/doc/$PRGNAM-$VERSION/pwauth
) || true
cat $SRCDIR/$(basename $0) > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
chown -R root:root $PKG/usr/doc/$PRGNAM-$VERSION
find $PKG/usr/doc -type f -exec chmod 644 {} \;

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

# Add a package description:
mkdir -p $PKG/install
cat $SRCDIR/slack-desc > $PKG/install/slack-desc

# Build the package:
cd $PKG
makepkg --linkadd y --chown n $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-tgz} 2>&1 | tee $OUTPUT/makepkg-${PRGNAM}.log
cd $OUTPUT
md5sum ${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-tgz} > ${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-tgz}.md5
cd -
cat $PKG/install/slack-desc | grep "^${PRGNAM}" > $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.txt

# Restore the original umask:
umask ${_UMASK_}