#!/bin/sh
#
# run after dh_auto_install to distribute installed files into
# their appropriate per-package locations
#

iam=post-auto-install
tmp=${TMPDIR:-/tmp}/$iam-$$
sts=1
trap "rm -f $tmp.*; exit \$sts" 0 1 2 3 15

# -n for show-me
# -v for increased verbosity
# ... no real checking of args here
#
verbose=0
showme=false
RM=rm
RMDIR=rmdir
while [ $# -gt 0 ]
do
    if [ X"$1" = X-v ]
    then
	verbose=`expr $verbose + 1`
    elif [ X"$1" = X-n ]
    then
	RM='echo + rm'
	RMDIR='echo + rmdir'
	showme=true
    fi
    shift
done

if [ -d debian ]
then
    cd debian
else
    # not run from dpkg-buildpackage, warn and continue
    #
    echo >&2 "$iam: Warning: debian not a dir below pwd, hope you know what you're doing"
fi

# from here on, everything is assumed to be happening from the
# "debian" directory created by dpkg-buildpackage, e.g.
# build/deb/pcp-X.Y.Z/debian
#

if [ ! -f control ]
then
    echo >&2 "$iam: Error: no control file"
    exit
fi

# base package is the first one in control ... all files and dirs
# not claimed by other packages will end up in this package
#
base_pkg=`sed <control -n -e '/^Package:/{
s/^Package://
s/[ 	]//g
p
q
}'`
if [ -z $base_pkg ]
then
    echo >&2 "$iam: Error: no Package: in the control file"
    exit
fi

# check dh_auto_install did the expected thing ... we assume
# rules overrides the dh_auto_install step with something like
#	dh_auto_install --destdir=debian/<base_pkg>
#
if [ ! -d $base_pkg ]
then
    echo >&2 "$iam: Error: base package $base_pkg dir not found"
    exit
fi

for pkg in `sed <control -n -e '/^Package:/{
s/^Package://
s/[ 	]//g
p
}'`
do
    if [ ! -d $pkg ]
    then
	if ! mkdir $pkg
	then
	    echo >&2 "$iam: Error: mkdir $pkg failed"
	    exit
	fi
    fi

    # skip the base package ... it will contain anything *not* distributed
    # to the other packages
    #
    [ $pkg = $base_pkg ] && continue

    # special-case handling for some packages ... the only part of
    # this script that is not generic, and is specific to PCP ...
    # we need special handling of the filelist here and at the removal
    # step below
    #
    filelist=$pkg.install
    rm -f $tmp.filelist
    case "$pkg"
    in
	python3-pcp)
		if [ ! -f ../python3-pcp.list ]
		then
		    echo >&2 "$iam: Error: python3-pcp expects ../python3-pcp.list"
		    echo >&2 "pwd=`pwd`"
		    ls >&2 -l ../*.list
		    exit
		fi
		# this one is special and outside the python3 build
		#
		echo "/usr/share/lintian/overrides/python3-pcp" >>../python3-pcp.list
 		sed <../python3-pcp.list >$tmp.filelist \
 		    -e '/\/__pycache__\//d' \
 		    -e 's@^/@@' \
 		# end
		filelist=$tmp.filelist
		;;
    esac

    if [ -f $filelist ]
    then
	# cherry-pick files from $base_pkg to $pkg
	#  - glob-expand any filenames in $filelist
	#  - then copy them out with tar so we preserve any directories
	#  - then remove them from $base_pkg
	#
	[ "$verbose" -gt 0 ] && echo >&2 "$iam: Info: processing $pkg filelist ($filelist)"
	rm -f $tmp.bad $tmp.tmp
	cat $filelist | while read file
	do
	    # special case if $file ends <path>/* use just <path> and tar
	    # will pick up everything below <path> ... needed for
	    # pcp-testsuite.install
	    #
	    case "$file"
	    in
		*/\*)
		    [ "$verbose" -gt 1 ] && echo "$iam: $file: trim trailing /*"
		    file=`echo "$file" | sed -e 's@/\*$@@'`
		    ;;
	    esac
	    if [ -f "$base_pkg/$file" -o -d "$base_pkg/$file" -o -L "$base_pkg/$file" ]
	    then
		echo "$file" >>$tmp.tmp
	    else
		# try glob expansion
		#
		[ "$verbose" -gt 1 ] && echo >&2 "$iam: try glob expansion for $file"
		for arg in `( cd $base_pkg; eval echo "$file" ) 2>/dev/null`
		do
		    [ "$verbose" -gt 1 ] && echo >&2 "$iam: glob: $file -> $arg"
		    if [ -z "$arg" ]
		    then
			echo >&2 "$iam: Warning: $pkg: $filelist: $file: no glob expansion files"
		    elif [ -f "$base_pkg/$arg" -o -d "$base_pkg/$arg" -o -L "$base_pkg/$arg" ]
		    then
			echo "$arg" >>$tmp.tmp
		    else
			echo >&2 "$iam: Warning: $pkg: $filelist: $file -> $arg: glob expansion file not found"
			ls >&2 -ld "$base_pkg/$arg"
		    fi
		done
	    fi
	done
	if [ -s $tmp.tmp ]
	then
	    # exit status from tar is not necessarily helpful, hence sniffing
	    # stderr files
	    #
	    if $showme
	    then
		echo "+ ( cd $base_pkg; tar cf - -T tmp.tmp ) | ( cd $pkg; tar xpf - )"
		echo "+ and tmp.tmp contains ..."
		cat $tmp.tmp
	    else
		( cd $base_pkg; tar cf - -T $tmp.tmp 2>$tmp.tar.in.err ) | ( cd $pkg; tar xpf - 2>$tmp.tar.out.err || touch $tmp.bad )
		if [ "$verbose" -gt 2 ]
		then
		    echo >&2 "$iam: tarball contents ..."
		    ( cd $base_pkg; tar cf - -T $tmp.tmp ) | tar tvf - >&2
		fi
	    fi
	    if [ -f $tmp.bad ] || [ -s $tmp.tar.in.err ] || [ -s $tmp.tar.out.err ]
	    then
		cat >&2 $tmp.tar.in.err $tmp.tar.out.err
		echo >&2 "$iam: Error: extract files from $base_pkg to $pkg failed"
		exit
	    fi
	else
	    # hmm ... no files found?
	    #
	    echo >&2 "$iam: Warning: $pkg: $filelist: nothing to copy, already done?"
	fi

	# for python3-pcp remove the full list (especially the __pycache__
	# dir that is not packaged and is populated with files in addition
	# to those mentioned in python3-pcp.list)
	#
	case "$pkg"
	in
	    python3-pcp)
 		sed -n <../python3-pcp.list >>$filelist -e '/__pycache__/{
s@^/@@
s@/[^/]*$@/*@
p
q
}'
 		# end
		;;
	esac

	cat $filelist \
	| while read file
	do
	    # remove files and symbolic links
	    #
	    # special case for "everthing below a dir" ... see note above
	    #
	    case "$file"
	    in
		*/\*)
		    file=`echo "$file" | sed -e 's@/\*$@@'`
		    ;;
	    esac
	    # may need glob expansion here, hence the unusual syntax
	    #
	    target=`echo $base_pkg/$file 2>/dev/null`
	    if [ -n "$target" ]
	    then
		$RM -rf "$target"
		# now cull any empty directories on the path to $file
		# - leaf to root traversal
		#
		dir=`dirname "$target"`
		while [ "$dir" != $base_pkg ]
		do
		    $RMDIR "$dir" >/dev/null 2>&1 || break
		    dir=`dirname "$dir"`
		done
	    else
		echo >&2 "$iam: Warning: $base_pkg/$file: removal failed (bad glob expansion?)"
	    fi
	done
    fi
    if [ -f $pkg.dirs ]
    then
	[ "$verbose" -gt 0 ] && echo >&2 "$iam: Info: processing $pkg.dirs"
	cat $pkg.dirs \
	| while read dir
	do
	    [ -d "$pkg/$dir" ] && continue
	    if ! mkdir -p -m 755 "$pkg/$dir"
	    then
		echo >&2 "$iam: Error: failed to mkdir: $pkg/$dir"
		exit
	    fi
	done
    fi

done

# Perl needs special handling to run "make install_perl" in each Perl
# source dir with DIST_ROOT set to the base dir for each package
#

if ( cd ..; debian/checkconf HAVE_PERL )
then
    if [ -z "$MAKE" ]
    then
	MAKE=`which make`
	echo >&2 "$iam: Warning: \$MAKE not set, using $MAKE"
    fi

    # add new Perl packages here ...
    #
    cat <<End-of-File | sed -e '/^#/d' | while read srcdir pkg
# src dir		package
src/perl/MMV		libpcp-mmv-perl
src/perl/PMDA		libpcp-pmda-perl
src/perl/LogImport	libpcp-import-perl
src/perl/LogSummary	libpcp-logsummary-perl
End-of-File
    do
	if [ ! -d "../$srcdir" ]
	then
	    echo >&2 "$iam: Error: Perl ../$srcdir: source dir does not exist"
	    exit
	fi
	if ! grep -q "^Package: $pkg$" control
	then
	    echo >&2 "$iam: Error: Perl package $pkg not in debian/control"
	    exit
	fi
	echo >&2 "$iam: Info: Perl install src=../$srcdir pkg=$pkg"
	DIST_ROOT=`pwd`/$pkg $MAKE -C "../$srcdir" install_perl
    done
else
    echo >&2 "$iam: Warning: HAVE_PERL is false, nothing to do"
fi

sts=0
exit
