#!/bin/bash

#
# Auto-generate requirements for executables (both ELF and a.out) and library
# sonames, script interpreters, and perl modules.
#

ulimit -c 0

case "$LD_PRELOAD" in
    *libfakeroot*)
	unset LD_PRELOAD
	;;
esac

RPM_BUILD_ROOT=$1

if [ -n "$RPM_BUILD_ROOT" ]; then
    echo "Using BuildRoot: $RPM_BUILD_ROOT to search libs" 1>&2
    LD_LIBRARY_PATH=$RPM_BUILD_ROOT/usr/X11R6/lib:$RPM_BUILD_ROOT/usr/lib:$RPM_BUILD_ROOT/lib
    export LD_LIBRARY_PATH
fi

filelist=`sed "s/['\"]/\\\&/g"`
exelist=`echo $filelist | xargs -r file | egrep -v ":.* (commands|script) " | \
	grep ":.*executable" | cut -d: -f1`
scriptlist=`echo $filelist  | grep -v /usr/doc | grep -v /usr/share/doc | xargs -r file | \
	egrep ":.* (commands|script) " | cut -d: -f1`
liblist=`echo $filelist | xargs -r file | \
	grep ":.*shared object" | cut -d : -f1`

interplist=
perllist=
pythonlist=
tcllist=

#
# --- Alpha does not mark 64bit dependencies
case `uname -m` in
  alpha*)	mark64="" ;;
  *)		mark64="()(64bit)" ;;
esac

#
# --- Perl or python deps
for f in $filelist; do
    echo $f | sed -n -e "s@$RPM_BUILD_ROOT@@" -e 's@^/usr/lib/perl5/\(site_perl/\)\{0,1\}\([0-9]\{1,\}\.[0-9]\{1,\}\)\.\([0-9]\{1,\}\).*$@perl-base >= \20\3@p' -e 's@^/usr/lib/python\([.0-9]\{1,\}\).*$@python-base >= \1@p'
done | sort -u

#
# --- Executable sonames.
for f in $exelist; do
    [ -r $f -a -x $f ] || continue
    lib64=`if file -L $f 2>/dev/null | \
	grep "ELF 64-bit" >/dev/null; then echo "$mark64"; fi`
    ldd $f | awk '/=>/ {
	if ($1 !~ /libNoVersion.so/ && $1 !~ /4[um]lib.so/) {
	    gsub(/'\''"/,"\\&",$1);
	    printf "%s'$lib64'\n", $1
	}
    }'
done | xargs -r -n 1 basename | sort -u | grep -v 'libsafe|libfakeroot'

#
# --- Library sonames.
for f in $liblist; do
    [ -r $f ] || continue
    lib64=`if file -L $f 2>/dev/null | \
	grep "ELF 64-bit" >/dev/null; then echo "$mark64"; fi`
    ldd $f | awk '/=>/ {
	if ($1 !~ /libNoVersion.so/ && $1 !~ /4[um]lib.so/) {
	    gsub(/'\''"/,"\\&",$1);
	    printf "%s'$lib64'\n", $1
	}
    }'
done | xargs -r -n 1 basename | sort -u | grep -v 'libsafe|libfakeroot'

#
# --- Script interpreters.
for f in $scriptlist; do
    [ -r $f -a -x $f ] || continue
    interp=`head -1 $f | sed -e 's/^\#\![ 	]*//' | cut -d" " -f1`
    interplist="$interplist $interp"
    case $interp in
    */perl)	perllist="$perllist $f" ;;
    *)		[ "${f%.pm}" != "${f}" ] && perllist="$perllist $f" ;;
    esac
done
if [ -n "$interplist" ]; then
    for i in `echo "$interplist" | tr '[:blank:]' \\\n | sort -u`; do
	if ! rpm -qf $i --qf '%{NAME}\n' 2>/dev/null; then
	    echo $i
	fi
    done | sort -u | grep -v 'libsafe|libfakeroot'
fi


#
# --- Weak symbol versions (from glibc).
[ -n "$mark64" ] && mark64="(64bit)"
for f in $liblist $exelist ; do
    [ -r $f ] || continue
    lib64=`if file -L $f 2>/dev/null | \
	grep "ELF 64-bit" >/dev/null; then echo "$mark64"; fi`
    objdump -p $f | awk '
	BEGIN { START=0; LIBNAME=""; }
	/Version References:/ { START=1; }
	/required from/ && (START==1) {
	    sub(/:/, "", $3);
	    LIBNAME=$3;
	}
	(START==1) && (LIBNAME!="") && ($4!="") && ($4~/^GLIBC_*/) {
	    print LIBNAME "(" $4 ")'$lib64'";
	}
	/^$/ { START=0; }
    '
done | sort -u | grep -v 'libsafe|libfakeroot'

#
# --- Perl modules.
#[ -x /usr/lib/rpm/perl.req -a -n "$perllist" ] && \
#    echo $perllist | tr '[:blank:]' \\n | /usr/lib/rpm/perl.req | sort -u

#
# --- Python modules.
[ -x /usr/lib/rpm/python.req -a -n "$pythonlist" ] && \
    echo $pythonlist | tr '[:blank:]' \\n | /usr/lib/rpm/python.req | sort -u

#
# --- Tcl modules.
[ -x /usr/lib/rpm/tcl.req -a -n "$tcllist" ] && \
    echo $tcllist | tr '[:blank:]' \\n | /usr/lib/rpm/tcl.req | sort -u

exit 0
