#!/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

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 \
	     usr/share/liblangtag \
	     lib/*-linux-gnu/libnss* \
		 -type f


	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,^/,,'
    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

# /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