epm-repack

#!/bin/sh
#
# Copyright (C) 2017-2018, 2020  Etersoft
# Copyright (C) 2017-2018, 2020  Vitaly Lipatov <lav@etersoft.ru>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

load_helper epm-sh-altlinux
load_helper epm-assure

[ -n "$EPM_REPACK_SCRIPTS_DIR" ] || EPM_REPACK_SCRIPTS_DIR="$CONFIGDIR/repack.d"


__epm_check_if_needed_repack()
{
    # FIXME: use real way (for any archive)
    # FIXME: from вроде не существует и не работает
    local pkgname="$(epm print name from "$1")"
    local repackcode="$EPM_REPACK_SCRIPTS_DIR/$pkgname.sh"
    [ -x "$repackcode" ] || return
    warning "There is repack rule for $pkgname package. It is better install this package via 'epm --repack install' or 'epm play'."
}

# arg: rpm or deb
# fills split_replaced_pkgs with packages of that type
__epm_split_by_pkg_type()
{
	local type="$1"
	shift

	split_replaced_pkgs=''

	for pkg in "$@" ; do
		[ "$(get_package_type "$pkg")" = "$type" ] || return 1
		[ -e "$pkg" ] || fatal "Can't read $pkg"
		split_replaced_pkgs="$split_replaced_pkgs $pkg"
	done

	[ -n "$split_replaced_pkgs" ]
}

# fills repacked_pkgs
__epm_repack_to_deb()
{
	local pkg
	local pkgs="$*"

	assure_exists alien
	assure_exists fakeroot
	assure_exists rpm

	repacked_pkgs=''

	local TDIR=$(mktemp -d --tmpdir=$BIGTMPDIR)

	for pkg in $pkgs ; do
		abspkg="$(realpath "$pkg")"
		info "Repacking $abspkg to local deb format (inside $TDIR) ..."

		alpkg=$(basename $pkg)
		# don't use abs package path: copy package to temp dir and use there
		cp $verbose $pkg $TDIR/$alpkg

		cd $TDIR || fatal
		__prepare_source_package "$pkg"

		showcmd_store_output fakeroot alien -d -k $scripts "$alpkg"
		local DEBCONVERTED=$(grep "deb generated" $RC_STDOUT | sed -e "s| generated||g")
		if [ -n "$DEBCONVERTED" ] ; then
			repacked_pkgs="$repacked_pkgs $(realpath $DEBCONVERTED)"
			to_remove_pkg_files="$to_remove_pkg_files $(realpath $DEBCONVERTED)"
		fi
		to_remove_pkg_dirs="$to_remove_pkg_files $TDIR"
		clean_store_output
		cd - >/dev/null
	done

	# TODO: move it to exit handler
	#if [ -z "$DEBUG" ] ; then
	#	# TODO: reinvent
	#	[ -n "$to_remove_pkg_files" ] && rm -f $to_remove_pkg_files
	#	[ -n "$to_remove_pkg_files" ] && rmdir $(dirname $to_remove_pkg_files | head -n1) 2>/dev/null
	#	[ -n "$to_remove_pkg_dirs" ] && rmdir $to_remove_pkg_dirs
	#fi

	#cd - >/dev/null
	return 0
}


# $spec $PKGNAME $VERSION
__set_name_version()
{
    SPEC="$1"
    PKGNAME="$2"
    VERSION="$3"
    [ -n "$PKGNAME" ] && subst "s|^Name:.*|Name: $PKGNAME|" $SPEC
    [ -n "$VERSION" ] && subst "s|^Version:.*|Version: $VERSION|" $SPEC
}

# args: pkgname buildroot spec
__fix_spec()
{
    local pkgname="$1"
    local buildroot="$2"
    local spec="$3"
    local i

    # drop forbidded paths
    # https://bugzilla.altlinux.org/show_bug.cgi?id=38842
    for i in / /etc /etc/init.d /etc/systemd /bin /opt /usr /usr/bin /usr/share /usr/share/doc /var /var/log /var/run \
            /etc/cron.daily /usr/share/icons /usr/share/pixmaps /usr/share/man /usr/share/man/man1 /usr/share/appdata /usr/share/applications /usr/share/menu ; do
        sed -i \
            -e "s|/\./|/|" \
            -e "s|^%dir[[:space:]]\"$i/*\"$||" \
            -e "s|^%dir[[:space:]]$i/*$||" \
            -e "s|^\"$i/*\"$||" \
            -e "s|^$i/*$||" \
            $spec
    done

    # commented out: conflicts with already installed package
    # drop %dir for existed system dirs
    #for i in $(grep '^%dir "' $spec | sed -e 's|^%dir  *"\(.*\)".*|\1|' ) ; do #"
    #    echo "$i" | grep -q '^/opt/' && continue
    #    [ -d "$i" ] && [ -n "$verbose" ] && echo "drop dir $i from packing, it exists in the system"
    #done

    # replace dir "/path/dir" -> %dir /path/dir
    grep '^"/' $spec | sed -e 's|^"\(/.*\)"$|\1|' | while read i ; do
        # add dir as %dir in the filelist
        if [ -d "$buildroot$i" ] ; then
            subst "s|^\(\"$i\"\)$|%dir \1|" $spec
        #else
        #    subst 's|^\("'$i'"\)$|\1|' $spec
        fi
    done

    # FIXME: where is a source of the bug with empty Summary?
    subst "s|Summary: *$|Summary: $pkgname (was empty Summary after alien)|" $spec
    subst "s|^\(Version: .*\)~.*|\1|" $spec
    subst "s|^Release: |Release: alt1.repacked.with.epm.|" $spec
    subst "s|^Distribution:.*||" $spec
    subst "s|^\((Converted from a\) \(.*\) \(package.*\)|(Repacked from binary \2 package with epm $EPMVERSION)\n\1 \2 \3|" $spec
    #" hack for highlight
}

# TODO: move this list from external file
__check_stoplist()
{
    cat <<EOF | grep -q "^$1$"
kesl
kesl-astra
klnagent
klnagent64
klnagent64-astra
EOF
}


# args: pkgname buildroot spec
__apply_fix_code()
{
    local repackcode="$EPM_REPACK_SCRIPTS_DIR/$1.sh"
    [ -x "$repackcode" ] || return
    shift
    export PATH=$PROGDIR:$PATH
    local bashopt=''
    [ -n "$verbose" ] && bashopt='-x'
    docmd bash $bashopt $repackcode "$1" "$2" "$3" || fatal "There is an error from $repackcode script"
}

__create_rpmmacros()
{
# FIXME:
[ -n "$TMPDIR" ] || TMPDIR=/tmp

    cat <<EOF >$HOME/.rpmmacros
%_topdir	$HOME/RPM
%_tmppath	$TMPDIR

%packager	EPM <support@etersoft.ru>
%_vendor	EEPM
%_gpg_name	support@etersoft.ru

%_allow_root_build	1
EOF
    to_remove_pkg_files="$to_remove_pkg_files $HOME/.rpmmacros"
}

__set_version_pkgname()
{
    local alpkg="$1"
    VERSION="$(echo "$alpkg" | grep -o -P "[-_.]([0-9])([0-9])*(\.[0-9])*" | head -n1 | sed -e 's|^[-_.]||')" #"
    [ -n "$VERSION" ] && PKGNAME="$(echo "$alpkg" | sed -e "s|[-_.]$VERSION.*||")"
}

# arg: <package file>
# sets:
#   alpkg      - package file name without path
#   PKGNAME    - package name
#   VERSION    - version of the package
#   SUBGENERIC - name of generic file's extension
__prepare_source_package()
{
    local pkg="$1"

    alpkg=$(basename $pkg)

    # TODO: use func for get name from deb pkg
    # TODO: epm print name from deb package
    # TODO: use stoplist only for deb?
    [ -z "$force" ] && __check_stoplist $(echo $alpkg | sed -e "s|_.*||") && fatal "Please use official package instead of $alpkg repacking (It is not recommended to use --force to skip this checking."

    PKGNAME=''
    VERSION=''
    SUBGENERIC=''

    # convert tarballs to tar (for alien)
    if rhas "$alpkg" "\.(rpm|deb)$" ; then
        return
    fi

    if rhas "$alpkg" "\.AppImage$" ; then
        __set_version_pkgname $alpkg
        [ -n "$VERSION" ] || fatal "Can't get version from $alpkg."
        SUBGENERIC='appimage'
        # TODO: move repack archive to erc?
        [ -x "$alpkg" ] || docmd chmod u+x $verbose "$alpkg"
        ./$alpkg --appimage-extract || fatal
        alpkg=$PKGNAME-$VERSION.tar
        assure_exists erc || fatal
        # make a tar for alien
        a= erc a $alpkg squashfs-root
        return
    fi

    __set_version_pkgname $alpkg
    if [ -n "$VERSION" ] ; then
        # TODO: don't use erc for detect type? then we potentially can skip install it
        assure_exists erc || fatal
        pkgtype="$(a= erc type $alpkg)"
        local newalpkg
        newalpkg=$PKGNAME-$VERSION.$pkgtype
        #[ -n "$PKGNAME" ] || PKGNAME=$(basename $alpkg .$pkgtype)
        if [ "$pkgtype" = "tar" ] || [ "$pkgtype" = "tar.gz" ] || [ "$pkgtype" = "tgz" ] ; then
            mv $alpkg $newalpkg
            :
        else
            newalpkg=$PKGNAME-$VERSION.tar
            #newalpkg=$(basename $alpkg .$pkgtype).tar
            assure_exists erc || fatal
            a= erc repack $alpkg $newalpkg || fatal
        fi
        if [ "$alpkg" != "$newalpkg" ] ; then
            rm -f $verbose $alpkg
            alpkg=$newalpkg
        fi
    else
        warning "Can't detect version in $alpkg. We have almost no chance it will supported in alien."
    fi
}


# will fill repacked_pkgs var
__epm_repack_to_rpm()
{
    local pkgs="$*"
    #case $DISTRNAME in
    #    ALTLinux|ALTServer)
    #        ;;
    #    *)
    #        assure_distr ALTLinux "install --repack for rpm target"
    #        ;;
    #esac

    # Note: install epm-repack for static (package based) dependencies
    assure_exists alien || fatal

    # TODO: check for all systems
	case $PKGFORMAT in
		rpm)
			assure_exists /usr/bin/rpmbuild rpm-build || fatal
			;;
		deb)
			assure_exists /usr/bin/rpmbuild rpm || fatal
			;;
	esac

    # TODO: improve
    if echo "$pkgs" | grep -q "\.deb" ; then
        assure_exists dpkg || fatal
        # TODO: Для установки требует: /usr/share/debconf/confmodule но пакет не может быть установлен
        # assure_exists debconf
    fi

    local pkg
    export HOME=$(mktemp -d --tmpdir=$BIGTMPDIR)
    __create_rpmmacros

    local alpkg
    local abspkg
    local tmpbuilddir
    repacked_pkgs=''
    for pkg in $pkgs ; do
        tmpbuilddir=$HOME/$(basename $pkg).tmpdir
        mkdir $tmpbuilddir
        abspkg="$(realpath $pkg)"
        info ""
        info "Repacking $abspkg to local rpm format (inside $tmpbuilddir) ..."

        alpkg=$(basename $pkg)
        # don't use abs package path: copy package to temp dir and use there
        cp $verbose $pkg $tmpbuilddir/../$alpkg

        cd $tmpbuilddir/../ || fatal
        __prepare_source_package "$pkg"
        cd $tmpbuilddir/ || fatal

        if [ -n "$verbose" ] ; then
            docmd alien --generate --to-rpm $verbose $scripts "../$alpkg" || fatal
        else
            showcmd alien --generate --to-rpm $scripts "../$alpkg"
            a='' alien --generate --to-rpm $scripts "../$alpkg" >/dev/null || fatal
        fi

        local subdir="$(echo *)"
        [ -d "$subdir" ] || fatal "can't find subdir"

        # detect spec and move to prev dir
        local spec="$(echo $tmpbuilddir/$subdir/*.spec)"
        [ -s "$spec" ] || fatal "can't find spec"
        mv $spec $tmpbuilddir || fatal
        spec="$tmpbuilddir/$(basename "$spec")"
        #__set_name_version $spec $PKGNAME $VERSION
        local pkgname="$(grep "^Name: " $spec | sed -e "s|Name: ||g" | head -n1)"

        # for tarballs fix permissions
        [ -n "$VERSION" ] && chmod $verbose -R a+rX $tmpbuilddir/$subdir/*

        __fix_spec $pkgname $tmpbuilddir/$subdir $spec
        __apply_fix_code "generic" $tmpbuilddir/$subdir $spec $pkgname
        [ -n "$SUBGENERIC" ] && __apply_fix_code "generic-$SUBGENERIC" $tmpbuilddir/$subdir $spec
        __apply_fix_code $pkgname $tmpbuilddir/$subdir $spec $pkgname
        # TODO: we need these dirs to be created
        to_remove_pkg_dirs="$to_remove_pkg_dirs $HOME/RPM/BUILD $HOME/RPM"
        showcmd rpmbuild --buildroot $tmpbuilddir/$subdir -bb $spec
        if [ -n "$verbose" ] ; then
            a='' rpmbuild --buildroot $tmpbuilddir/$subdir -bb $spec || fatal
        else
            a='' rpmbuild --buildroot $tmpbuilddir/$subdir -bb $spec >/dev/null || fatal
        fi
        # remove copy of source binary package (don't mix with generated)
        rm -f $tmpbuilddir/../$alpkg
        local repacked_rpm="$(realpath $tmpbuilddir/../*.rpm)"
        if [ -s "$repacked_rpm" ] ; then
            repacked_pkgs="$repacked_pkgs $repacked_rpm"
            to_remove_pkg_files="$to_remove_pkg_files $repacked_rpm"
        else
            warning "Can't find converted rpm for source binary package '$pkg'"
        fi
        cd - >/dev/null
        rm -rf $tmpbuilddir/$subdir/
        rm -rf $spec
    done

    to_remove_pkg_dirs="$to_remove_pkg_dirs $HOME"
    rmdir $tmpbuilddir
    #rmdir $tmpbuilddir/..
    true
}


__epm_remove_tmp_files()
{
    # TODO: move it to exit handler
    if [ -z "$DEBUG" ] ; then
        # TODO: reinvent
        [ -n "$to_remove_pkg_files" ] && rm -f $to_remove_pkg_files
        # hack??
        [ -n "$to_remove_pkg_files" ] && rmdir $(dirname $to_remove_pkg_files | head -n1) 2>/dev/null
        [ -n "$to_remove_pkg_dirs" ] && rmdir $to_remove_pkg_dirs 2>/dev/null
    fi
    return 0
}

# FIXME: Нужно как-то обеспечить непродолжение выполнения.
# used in epm install
# fill repacked_pkgs
__epm_repack()
{
	repacked_pkgs=''
	case $PKGFORMAT in
		rpm)
			__epm_repack_to_rpm "$@" || return
			;;
		deb)
			# FIXME: only one package in $@ is supported
			#local pkgname="$(epm print name from "$@")"
			__set_version_pkgname "$1"
			local repackcode="$EPM_REPACK_SCRIPTS_DIR/$PKGNAME.sh"
			if [ -x "$repackcode" ] ; then
				__epm_repack_to_rpm "$@" || return
				[ -n "$repacked_pkgs" ] || return
				__epm_repack_to_deb $repacked_pkgs
			else
				__epm_repack_to_deb "$@" || return
			fi
			;;
		*)
			fatal "$PKGFORMAT is not supported for repack yet"
			;;
	esac

	return 0
}

__epm_repack_if_needed()
{
	# return 1 if there is a package in host package format
	__epm_split_by_pkg_type $PKGFORMAT "$@" && return 1

	__epm_repack "$@"
	return 0
}

epm_repack()
{
    local CURDIR="$(pwd)"
    # if possible, it will put pkg_urls into pkg_files and reconstruct pkg_filenames
    if [ -n "$pkg_urls" ] ; then
        load_helper epm-download
        __handle_pkg_urls_to_install
    fi

    [ -n "$pkg_names" ] && warning "Can't find $pkg_names"
    [ -z "$pkg_files" ] && info "Skip empty repack list" && return 22

    if __epm_repack $pkg_files && [ -n "$repacked_pkgs" ] ; then
        cp $repacked_pkgs "$CURDIR"
        if [ -z "$quiet" ] ; then
            echo
            echo "Adapted packages:"
            for i in $repacked_pkgs ; do
                echo "	$CURDIR/$(basename "$i")"
            done
        fi
    fi

    __epm_remove_tmp_files
}