# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

inherit autotools perl-module systemd toolchain-funcs

DESCRIPTION="The Advanced Maryland Automatic Network Disk Archiver"
HOMEPAGE="http://www.amanda.org/"
SRC_URI="mirror://sourceforge/amanda/${P}.tar.gz"

LICENSE="HPND BSD BSD-2 GPL-2+ GPL-3+"
SLOT="0"
IUSE="curl gnuplot ipv6 kerberos minimal ndmp nls readline s3 samba systemd xfs"

KEYWORDS="~amd64 ~ppc ~ppc64 ~sparc ~x86"
DEPEND="
	acct-group/amanda
	acct-user/amanda
	app-arch/dump
	app-arch/tar
	dev-libs/glib:2
	dev-lang/perl:=
	dev-perl/Encode-Locale
	dev-perl/JSON
	net-misc/openssh
	sys-libs/readline:=
	virtual/awk
	kerberos? ( app-crypt/mit-krb5 )
	nls? ( virtual/libintl )
	samba? ( net-fs/samba:= )
	s3? ( net-misc/curl )
	!s3? ( curl? ( net-misc/curl ) )
	xfs? ( sys-fs/xfsdump )
	!minimal? (
		app-arch/mt-st:=
		app-crypt/aespipe
		app-crypt/gnupg
		dev-perl/XML-Simple
		sys-block/mtx
		virtual/mailx
		gnuplot? ( sci-visualization/gnuplot )
	)"
RDEPEND="${DEPEND}"
BDEPEND="
	app-text/docbook-xsl-stylesheets
	app-text/docbook-xml-dtd
	dev-lang/swig
	dev-libs/libxslt
	virtual/pkgconfig
	nls? ( sys-devel/gettext )"

PATCHES=( "${FILESDIR}"/${P}-fno-common.patch )

MYFILESDIR="${T}/files"
ENVDIR="/etc/env.d"
ENVDFILE="97amanda"
TMPENVFILE="${T}/${ENVDFILE}"

# This is a complete list of Amanda settings that the ebuild takes from the
# build environment. This allows users to alter the behavior of the package as
# upstream intended, but keeping with Gentoo style. We store a copy of them in
# /etc/env.d/97amanda during the install, so that they are preserved for future
# installed. This variable name must not start with AMANDA_, as we do not want
# it captured into the env file.
ENV_SETTINGS_AMANDA="
AMANDA_GROUP_NAME
AMANDA_USER_NAME AMANDA_USER_HOMEDIR
AMANDA_SERVER AMANDA_SERVER_TAPE AMANDA_SERVER_TAPE_DEVICE AMANDA_SERVER_INDEX
AMANDA_TAR_LISTDIR AMANDA_TAR
AMANDA_PORTS_UDP AMANDA_PORTS_TCP AMANDA_PORTS_BOTH AMANDA_PORTS
AMANDA_CONFIG_NAME AMANDA_TMPDIR"

amanda_variable_setup() {
	# Setting vars
	local currentamanda

	# Grab the current settings
	currentamanda="$(set | egrep "^AMANDA_" | grep -v '^AMANDA_ENV_SETTINGS' | xargs)"

	# First we set the defaults
	AMANDA_GROUP_NAME=amanda
	AMANDA_USER_NAME=amanda
	AMANDA_USER_HOMEDIR=/var/spool/amanda

	# This installs Amanda, with the server. However, it could be a client,
	# just specify an alternate server name in AMANDA_SERVER.
	: ${AMANDA_SERVER:=${HOSTNAME}}
	: ${AMANDA_SERVER_TAPE:=${AMANDA_SERVER}}
	: ${AMANDA_SERVER_TAPE_DEVICE:="${EPREFIX}"/dev/nst0}
	: ${AMANDA_SERVER_INDEX:=${AMANDA_SERVER}}
	: ${AMANDA_TAR_LISTDIR:=${AMANDA_USER_HOMEDIR}/tar-lists}
	: ${AMANDA_CONFIG_NAME:=DailySet1}
	: ${AMANDA_TMPDIR:="${EPREFIX}"/var/tmp/amanda}
	: ${AMANDA_DBGDIR:=${AMANDA_TMPDIR}}
	# These are left empty by default
	: ${AMANDA_PORTS_UDP:=""}
	: ${AMANDA_PORTS_TCP:=""}
	: ${AMANDA_PORTS_BOTH:=""}
	: ${AMANDA_PORTS:=""}

	# What tar to use
	: ${AMANDA_TAR:=/bin/tar}

	# Now pull in the old stuff
	if [[ -f ${EROOT}${ENVDIR}/${ENVDFILE} ]]; then
		# We don't just source it as we don't want everything in there.
		eval $(egrep "^AMANDA_" "${EROOT}${ENVDIR}/${ENVDFILE}" | grep -v '^AMANDA_ENV_SETTINGS')
	fi

	# Re-apply the new settings if any
	[[ -n ${currentamanda} ]] && eval $(echo "${currentamanda}")
}

pkg_setup() {
	amanda_variable_setup

	# If USE=minimal, give out a warning, if AMANDA_SERVER is not set to
	# another host than HOSTNAME.
	if use minimal && [[ ${AMANDA_SERVER} == ${HOSTNAME} ]]; then
		elog "You are installing a client-only version of Amanda."
		elog "You should set the variable \$AMANDA_SERVER to point at your"
		elog "Amanda-tape-server, otherwise you will have to specify its name"
		elog "when using amrecover on the client."
		elog "For example: Use something like"
		elog "AMANDA_SERVER=\"myserver\" emerge amanda"
		elog
	fi
}

src_unpack() {
	# we do not want the perl src_unpack
	default
}

src_prepare() {
	default
	# gentoo bug #331111
	sed -i '/^check-local: check-perl$/d' config/automake/scripts.am || die
	sed -i '/^check-local:/s,syntax-check,,g' perl/Makefile.am || die

	# bug with glibc-2.16.0
	sed -i -e '/gets is a security/d' gnulib/stdio.in.h || die

	# https://bugs.gentoo.org/701416 sandbox violation
	sed -i -e 's/case `"$SAMBA_CLIENT.*/case "Connection to nosuchhost.amanda.org failed" in/' config/amanda/dumpers.m4 || die

	eautoreconf

	# places for us to work in
	mkdir -p "${MYFILESDIR}" || die
	# Now we store the settings we just created
	set | egrep "^AMANDA_" | grep -v '^AMANDA_ENV_SETTINGS' > "${TMPENVFILE}" || die

	# Prepare our custom files
	einfo "Building custom configuration files"
	local i # our iterator
	local sedexpr # var for sed expr
	sedexpr=''
	for i in ${ENV_SETTINGS_AMANDA}; do
		local val
		eval "val=\"\${${i}}\""
		sedexpr="${sedexpr}s|__${i}__|${val}|g;"
	done

	# now apply the sed expr
	for i in "${FILESDIR}"/amanda-*; do
		sed -re "${sedexpr}" <"${i}" >"${MYFILESDIR}/`basename ${i}`" || die
	done

	if use minimal; then
		cat "${MYFILESDIR}"/amanda-amandahosts-server-2.5.1_p3-r1 > "${T}"/amandahosts || die
	else
		sed -i -e 's:^\(my $amandahomedir\)=.*:\1 = $localstatedir;:' \
			server-src/am{addclient,serverconfig}.pl || die
		cat "${MYFILESDIR}"/amanda-amandahosts-client-2.5.1_p3-r1 > "${T}"/amandahosts || die
	fi

	eapply_user
}

src_configure() {
	# fix bug #36316
	addpredict /var/cache/samba/gencache.tdb
	# fix bug #376169
	addpredict /run/blkid
	addpredict /etc/blkid.tab

	[[ ! -f ${TMPENVFILE} ]] && die "Variable setting file (${TMPENVFILE}) should exist!"
	source "${TMPENVFILE}"
	local myconf=()

	einfo "Using ${AMANDA_SERVER_TAPE} for tape server."
	myconf+=( --with-tape-server="${AMANDA_SERVER_TAPE}" )
	einfo "Using ${AMANDA_SERVER_TAPE_DEVICE} for tape server."
	myconf+=( --with-tape-device="${AMANDA_SERVER_TAPE_DEVICE}" )
	einfo "Using ${AMANDA_SERVER_INDEX} for index server."
	myconf+=( --with-index-server="${AMANDA_SERVER_INDEX}" )
	einfo "Using ${AMANDA_USER_NAME} for amanda user."
	myconf+=( --with-user="${AMANDA_USER_NAME}" )
	einfo "Using ${AMANDA_GROUP_NAME} for amanda group."
	myconf+=( --with-group="${AMANDA_GROUP_NAME}" )
	einfo "Using ${AMANDA_TAR} as Tar implementation."
	myconf+=( --with-gnutar="${AMANDA_TAR}" )
	einfo "Using ${AMANDA_TAR_LISTDIR} as tar listdir."
	myconf+=( --with-gnutar-listdir="${AMANDA_TAR_LISTDIR}" )
	einfo "Using ${AMANDA_CONFIG_NAME} as default config name."
	myconf+=( --with-config="${AMANDA_CONFIG_NAME}" )
	einfo "Using ${AMANDA_TMPDIR} as Amanda temporary directory."
	myconf+=( --with-tmpdir="${AMANDA_TMPDIR}" )

	if [[ -n ${AMANDA_PORTS_UDP} && -n ${AMANDA_PORTS_TCP} && -z ${AMANDA_PORTS_BOTH} ]]; then
		eerror "If you want _both_ UDP and TCP ports, please use only the"
		eerror "AMANDA_PORTS environment variable for identical ports, or set"
		eerror "AMANDA_PORTS_BOTH."
		die "Bad port setup!"
	fi
	if [[ -n ${AMANDA_PORTS_UDP} ]]; then
		einfo "Using UDP ports ${AMANDA_PORTS_UDP/,/-}"
		myconf+=( --with-udpportrange="${AMANDA_PORTS_UDP}" )
	fi
	if [[ -n ${AMANDA_PORTS_TCP} ]]; then
		einfo "Using TCP ports ${AMANDA_PORTS_TCP/,/-}"
		myconf+=( --with-tcpportrange="${AMANDA_PORTS_TCP}" )
	fi
	if [[ -n ${AMANDA_PORTS} ]]; then
		einfo "Using ports ${AMANDA_PORTS/,/-}"
		myconf+=( --with-portrange="${AMANDA_PORTS}" )
	fi

	# Extras
	# Speed option
	myconf+=( --with-buffered-dump )
	# "debugging" in the configuration is NOT debug in the conventional sense.
	# It is actually just useful output in the application, and should remain
	# enabled. There are some cases of breakage with MTX tape changers as of
	# 2.5.1p2 that it exposes when turned off as well.
	myconf+=( --with-debugging )
	# Where to put our files
	myconf+=( --localstatedir="${AMANDA_USER_HOMEDIR}" )

	# Samba support
	myconf+=( $(use_with samba smbclient /usr/bin/smbclient) )

	# Support for BSD, SSH, BSDUDP, BSDTCP security methods all compiled in by
	# default
	myconf+=( --with-bsd-security )
	myconf+=( --with-ssh-security )
	myconf+=( --with-bsdudp-security )
	myconf+=( --with-bsdtcp-security )

	# kerberos-security mechanism version 5
	myconf+=( $(use_with kerberos krb5-security) )

	# Amazon S3 support
	myconf+=( $(use_enable s3 s3-device) )

	# libcurl is required for S3 but otherwise optional
	if ! use s3; then
		myconf+=( $(use_with curl libcurl) )
	fi

	# Client only, as requested in bug #127725
	if use minimal; then
		myconf+=( --without-server )
	else
		# amplot
		myconf+=( $(use_with gnuplot) )
	fi

	# IPv6 fun.
	myconf+=( $(use_with ipv6) )
	# This is to prevent the IPv6-is-working test
	# As the test fails on binpkg build hosts with no IPv6.
	use ipv6 && export amanda_cv_working_ipv6=yes

	# I18N
	myconf+=( $(use_enable nls) )

	# Bug #296634: Perl location
	perl_set_version
	myconf+=( --with-amperldir="${VENDOR_LIB}" )

	# Bug 296633: --disable-syntax-checks
	# Some tests are not safe for production systems
	myconf+=( --disable-syntax-checks )

	# build manpages
	myconf+=( --enable-manpage-build )

	# Bug #636262
	myconf+=( $(use_with ndmp ndmp) )

	# bug #483120
	tc-export AR

	econf \
		--disable-static \
		$(use_with readline) \
		"${myconf[@]}"
}

src_compile() {
	# Again, do not want the perl-module src_compile
	default
}

# We do not want the perl-module tests.
src_test() {
	default
}

# We have had reports of amanda file permissions getting screwed up.
# Losing setuid, becoming too lax etc.
# ONLY root and users in the amanda group should be able to run these binaries!
amanda_permissions_fix() {
	local root="$1"
	[[ -z ${root} ]] && die "Failed to pass root argument to amanda_permissions_fix!"
	local i le=/usr/libexec/amanda
	for i in "${le}"/calcsize "${le}"/killpgrp "${le}"/rundump "${le}"/runtar; do
		[[ -e ${root}/${i} ]] || continue
		chown root:${AMANDA_GROUP_NAME} "${root}"/${i} || die
		chmod u=srwx,g=rx,o= "${root}"/${i} || die
	done

	# amanda-security.conf is a config file with similar requirements:
	# writable only by root
	# world-readable
	# 3.3.9: introduced in /etc/amanda-security.conf
	# 3.4.2: moved to /etc/amanda/amanda-security.conf
	f=/etc/amanda/amanda-security.conf
	chown root:root "${root}""${f}" || die
	chmod u=rw,go=r "${root}""${f}" || die
}

src_install() {
	[[ ! -f ${TMPENVFILE} ]] && die "Variable setting file (${TMPENVFILE}) should exist!"
	source ${TMPENVFILE}

	einfo "Doing stock install"
	emake DESTDIR="${D}" install

	# Build the envdir file
	# Don't forget this..
	einfo "Installing environment config file"
	newenvd - "${ENVDFILE}" <<- _EOF_
		# These settings are what was present in the environment when this
		# Amanda was compiled.  Changing anything below this comment will
		# have no effect on your application, but it merely exists to
		# preserve them for your next emerge of Amanda
		$(cat "${TMPENVFILE}" | sed "s,=\$,='',g")
	_EOF_

	einfo "Installing systemd service and socket files for Amanda"
	systemd_dounit "${FILESDIR}"/amanda.socket
	systemd_newunit "${FILESDIR}"/amanda.service 'amanda@.service'

	# Lock down next section (up until docs).
	insopts -m0640
	# Installing Amanda Xinetd Services Definition
	einfo "Installing xinetd service file"
	insinto /etc/xinetd.d
	if use minimal; then
		newins "${MYFILESDIR}"/amanda-xinetd-2.6.1_p1-client amanda
	else
		newins "${MYFILESDIR}"/amanda-xinetd-2.6.1_p1-server amanda
	fi

	if ! use minimal; then
		einfo "Installing Sample Daily Cron Job for Amanda"
		insinto /etc/cron.daily
		newins "${MYFILESDIR}"/amanda-cron amanda
	fi

	insinto /etc/amanda
	einfo "Installing .amandahosts File for ${AMANDA_USER_NAME} user"
	doins "${T}/amandahosts"
	fperms 600 /etc/amanda/amandahosts

	dosym "${AMANDA_USER_HOMEDIR}/.amandahosts" /etc/amanda/amandahosts
	insinto "${AMANDA_USER_HOMEDIR}"
	einfo "Installing .profile for ${AMANDA_USER_NAME} user"
	newins "${MYFILESDIR}"/amanda-profile .profile

	insinto /etc/amanda
	doins example/amanda-client.conf
	if ! use minimal; then
		insinto "/etc/amanda/${AMANDA_CONFIG_NAME}"
		doins example/amanda.conf
		doins example/disklist
		keepdir "${AMANDA_USER_HOMEDIR}/${AMANDA_CONFIG_NAME}/index"
	fi

	keepdir "${AMANDA_TAR_LISTDIR}"
	keepdir "${AMANDA_USER_HOMEDIR}/amanda"
	keepdir "${AMANDA_TMPDIR}/dumps"
	# Just make sure it exists for XFS to work...
	use xfs && keepdir /var/xfsdump/inventory

	local i
	for i in "${AMANDA_TMPDIR}" /etc/amanda; do
		einfo "Securing directory (${i})"
		fowners -R ${AMANDA_USER_NAME}:${AMANDA_GROUP_NAME} ${i}
	done
	# Do NOT use -R
	fperms 0700 \
		"${AMANDA_USER_HOMEDIR}" "${AMANDA_TAR_LISTDIR}" \
		"${AMANDA_TMPDIR}" "${AMANDA_TMPDIR}/dumps" \
		"${AMANDA_USER_HOMEDIR}/amanda" \
		/etc/amanda

	if ! use minimal; then
		fperms 0700 \
			 "${AMANDA_USER_HOMEDIR}/${AMANDA_CONFIG_NAME}" \
			 /etc/amanda/${AMANDA_CONFIG_NAME}
	fi

	einfo "Setting setuid permissions"
	amanda_permissions_fix "${ED}"

	# Relax permissions again
	insopts -m0644

	# docs
	einfo "Installing documentation"
	dodoc AUTHORS ChangeLog DEVELOPING NEWS README ReleaseNotes UPGRADING
	# our inetd sample
	einfo "Installing standard inetd sample"
	newdoc "${MYFILESDIR}"/amanda-inetd.amanda.sample-2.6.0_p2-r2 amanda-inetd.amanda.sample
	# Amanda example configs
	einfo "Installing example configurations"
	rm "${ED}"/usr/share/amanda/{COPYRIGHT,ChangeLog,NEWS,ReleaseNotes} || die
	mv "${ED}"/usr/share/amanda/example "${ED}"/usr/share/doc/${PF}/ || die
	docinto example1
	newdoc "${FILESDIR}"/example_amanda.conf amanda.conf
	newdoc "${FILESDIR}"/example_disklist-2.5.1_p3-r1 disklist
	newdoc "${FILESDIR}"/example_global.conf global.conf

	einfo "Cleaning up dud .la files"
	perl_set_version

	find "${ED}" -name '*.la' -delete || die
}

pkg_postinst() {
	[[ ! -f ${TMPENVFILE} && ${MERGE_TYPE} == "binary" ]] && TMPENVFILE="${EROOT}${ENVDIR}/${ENVDFILE}"
	[[ ! -f ${TMPENVFILE} ]] && die "Variable setting file (${TMPENVFILE}) should exist!"
	source "${TMPENVFILE}"

	# Migration of amandates from /etc to $localstatedir/amanda
	if [[ -f ${EROOT}/etc/amandates && ! -f ${EROOT}/${AMANDA_USER_HOMEDIR}/amanda/amandates ]]; then
		einfo "Migrating amandates from /etc/ to ${AMANDA_USER_HOMEDIR}/amanda"
		einfo "A backup is also placed at /etc/amandates.orig"
		cp -dp "${EROOT}"/etc/amandates "${EROOT}"/etc/amandates.orig || die
		mkdir -p "${EROOT}/${AMANDA_USER_HOMEDIR}/amanda/" || die
		cp -dp "${EROOT}"/etc/amandates "${EROOT}"/${AMANDA_USER_HOMEDIR}/amanda/amandates || die
	fi
	if [[ -f ${EROOT}/etc/amandates ]]; then
		einfo "If you have migrated safely, please delete /etc/amandates"
	fi

	einfo "Checking setuid permissions"
	amanda_permissions_fix "${EROOT}"/

	elog "You should configure Amanda in /etc/amanda now."
	elog
	elog "If you use xinetd, Don't forget to check /etc/xinetd.d/amanda"
	elog "and restart xinetd afterwards!"
	elog
	elog "Otherwise, please look at /usr/share/doc/${PF}/inetd.amanda.sample"
	elog "as an example of how to configure your inetd."
	elog
	elog "systemd-users: enable and start amanda.socket or the relevant services"
	elog "regarding what auth method you use."
	elog
	elog "NOTICE: If you need raw access to partitions you need to add the"
	elog "amanda user to the 'disk' group."
	elog
	elog "NOTICE: If you have a tape changer, you need to add the amanda user"
	elog "to the 'tape' group."
	elog
	elog "If you use localhost in your disklist your restores may break."
	elog "You should replace it with the actual hostname!"
	elog "Please also see the syntax changes to amandahosts."
	elog "The only exception is when you use the authentication method 'local'."
	elog
	elog "Please note that this package no longer explicitly depends on"
	elog "virtual/inetd, as it supports modes where an inetd is not needed"
	elog "(see bug #506028 for details)."
}