#!/bin/bash

test $# -eq 2 || { echo "Usage: $0 <chroot template directory for system libs to create> <LO installation directory>"; exit 1; }

# No provision for spaces or other weird characters in pathnames. So sue me.

CHROOT=$1
INSTDIR=$2
POCODIR=/usr/local/lib

test -d "$INSTDIR" || { echo "No such directory: $INSTDIR"; exit 1; }

mkdir $CHROOT || exit 1

CHROOT=`cd $CHROOT && /bin/pwd`
INSTDIR=`cd $INSTDIR && /bin/pwd`

cd / || exit 1

(
    # Produce a list of file names, one per line, that will be copied
    # into the template tree of system files for the chroot jails.

    if [ `uname -s` = Linux ]; then

	# First essential files and shared objects
	find etc/passwd etc/group etc/hosts \
	     etc/resolv.conf \
	     lib/ld-* lib64/ld-* \
	     etc/ld.so.* \
	     lib/libnss_* lib64/libnss_* \
	     var/cache/fontconfig \
	     etc/fonts \
	     etc/localtime \
	     usr/lib/locale/en_US.utf8 \
	     usr/lib/locale/C.UTF-8 \
	     usr/lib/locale/locale_archive \
	     usr/share/zoneinfo/* \
	     usr/share/liblangtag \
	     lib/*-linux-gnu/libnss* \
		 -type f

	find etc/fonts \
	     lib/libnss_* \
	     lib64/libnss_* \
	     lib/*-linux-gnu/libnss* \
		 -type l

	find lib/libnss_* lib64/libnss_* -type l
	find lib/*-linux-gnu/libnss* -type l

	# Go through the LO shared objects and check what system libraries
	# they link to.
	find $INSTDIR -name '*.so' -o -name '*.so.[0-9]*' |
	while read file; do
	    ldd $file 2>/dev/null
	done |
	grep -v dynamic | cut -d " " -f 3 | grep -E '^(/lib|/usr)' | sort -u | sed -e 's,^/,,'

	# Go through the loolkit
	find $POCODIR -name '*Poco*.so' -o -name '*.so.[0-9]*' |
	while read file; do
	    ldd $file 2>/dev/null
	done |
	grep -v dynamic | cut -d " " -f 3 | grep -E '^(/lib|/usr)' | sort -u | sed -e 's,^/,,'

    else
	find usr/lib/dyld  \
	     usr/lib/*.dylib \
	     usr/lib/system/*.dylib \
	     System/Library/Frameworks/Accelerate.framework \
	     System/Library/Frameworks/ApplicationServices.framework \
	     System/Library/Frameworks/CFNetwork.framework \
	     System/Library/Frameworks/Carbon.framework \
	     System/Library/Frameworks/CoreFoundation.framework \
	     System/Library/Frameworks/CoreGraphics.framework \
	     System/Library/Frameworks/CoreServices.framework \
	     System/Library/Frameworks/CoreText.framework \
	     System/Library/Frameworks/DiskArbitration.framework \
	     System/Library/Frameworks/Foundation.framework \
	     System/Library/Frameworks/ImageIO.framework \
	     System/Library/Frameworks/IOKit.framework \
	     System/Library/Frameworks/IOSurface.framework \
	     System/Library/Frameworks/NetFS.framework \
	     System/Library/Frameworks/OpenDirectory.framework \
	     System/Library/Frameworks/Security.framework \
	     System/Library/Frameworks/SystemConfiguration.framework \
	     System/Library/PrivateFrameworks/DataDetectorsCore.framework \
	     System/Library/PrivateFrameworks/MultitouchSupport.framework \
	     System/Library/PrivateFrameworks/NetAuth.framework \
	     System/Library/PrivateFrameworks/login.framework \
	         -type f

	find $INSTDIR -name '*.dylib' |
	while read file; do
	    otool -L $file 2>/dev/null
	done |
	sed -e 's/^[ 	]//' | grep -E '^/(lib|usr/lib)/' | cut -d' ' -f1 | sort -u | sed -e 's,^/,,'
    fi
) |

# Can't use -l because then symlinks won't be handled well enough.
# This will now copy the file a symlink points to, but whatever.
cpio -p -d -L $CHROOT

mkdir -p $CHROOT/tmp
mkdir -p $CHROOT/usr/bin/
dummy=$CHROOT/usr/bin/dummy

# checking for library containing Poco::Application
cat <<_ACEOF >$dummy.cpp
#include <iostream>
#include <Poco/Util/Application.h>

using Poco::Util::Application;

int main ()
{
  std::cout << "Poco functionality OK!" << std::endl;
  return Application::EXIT_OK;
}
_ACEOF

gcc_compile='g++ -o $dummy.o -c $dummy.cpp'
(eval "$gcc_compile") 2>$dummy.err

if ! test $? = 0; then
  cat $dummy.err;
  exit 1;
fi

gcc_link='g++ -o $dummy -lcap -lpng -ldl  -lPocoNet -lPocoUtil -lPocoXML -lPocoJSON -lPocoFoundation $dummy.o'
(eval "$gcc_link") 2>$dummy.err

if ! test $? = 0; then
  cat $dummy.err;
  exit 1;
fi

lib_poco=$( echo "$dummy" |
  while read file; do
    ldd $file 2>/dev/null
  done |
  grep -v dynamic | cut -d " " -f 3 | grep -E '^(/lib|/usr)')

for lib in $lib_poco
do
  cp --parent -n $lib $CHROOT

  libs=$( echo $lib |
  while read file; do
    ldd $file 2>/dev/null
  done |
  grep -v dynamic | cut -d " " -f 3 | grep -E '^(/lib|/usr)')

  for sofile in $libs
  do
    cp --parent -n $sofile $CHROOT
  done
done

loaders="$(find /lib/ld-* -type l) $(find /lib32/ld-* -type l) $(find /lib64/ld-* -type l)"

for loader in $loaders
do
  cp --parent -n $loader $CHROOT
done

# /usr/share/fonts needs to be taken care of separately because the
# directory time stamps must be preserved are for fontconfig to trust
# its cache.

cd $CHROOT || exit 1

if [ `uname -s` = Linux ]; then
    mkdir -p usr/share || exit 1
    cp -r -p /usr/share/fonts usr/share

    if [ -h usr/share/fonts/ghostscript ]; then
	mkdir usr/share/ghostscript || exit 1
	cp -r -p /usr/share/ghostscript/fonts usr/share/ghostscript
    fi
fi

echo "testing if Poco libraries were installed properly"
sudo chroot $CHROOT /usr/bin/dummy