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# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI="6"

inherit eutils flag-o-matic autotools

PATCHREV="r0"
PATCHSET="gentoo-${PVR}/${PATCHREV}"

DESCRIPTION="A small but very powerful text-based mail client"
HOMEPAGE="http://www.mutt.org/"
MUTT_G_PATCHES="mutt-gentoo-${PV}-patches-${PATCHREV}.tar.xz"
SRC_URI="ftp://ftp.mutt.org/pub/mutt/${P}.tar.gz
	https://bitbucket.org/${PN}/${PN}/downloads/${P}.tar.gz
	https://dev.gentoo.org/~grobian/distfiles/${MUTT_G_PATCHES}"
IUSE="berkdb debug doc gdbm gnutls gpgme +hcache idn +imap kerberos libressl +lmdb mbox nls pgp-classic pop qdbm +sasl selinux slang smime-classic +smtp +ssl tokyocabinet vanilla prefix"
# hcache: allow multiple, bug #607360
REQUIRED_USE="
	hcache?           ( || ( berkdb gdbm lmdb qdbm tokyocabinet ) )
	imap?             ( ssl )
	pop?              ( ssl )
	smime-classic?    ( ssl !gnutls )
	smtp?             ( ssl sasl )
	sasl?             ( || ( imap pop smtp ) )
	kerberos?         ( || ( imap pop smtp ) )"
SLOT="0"
LICENSE="GPL-2"
KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~mips ~ppc ~ppc64 ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
# yes, we overdepend on the backend impls here, hopefully one day we can
# have REQUIRED_USE do what it is made for again. bug #607360
CDEPEND="
	app-misc/mime-types
	virtual/libiconv

	berkdb?        ( >=sys-libs/db-4:= )
	gdbm?          ( sys-libs/gdbm )
	lmdb?          ( dev-db/lmdb:= )
	qdbm?          ( dev-db/qdbm )
	tokyocabinet?  ( dev-db/tokyocabinet )

	ssl? (
		gnutls?    ( >=net-libs/gnutls-1.0.17:= )
		!gnutls? (
			libressl? ( dev-libs/libressl:= )
			!libressl? ( >=dev-libs/openssl-0.9.6:0= )
		)
	)

	nls?           ( virtual/libintl )
	sasl?          ( >=dev-libs/cyrus-sasl-2 )
	kerberos?      ( virtual/krb5 )
	idn?           ( net-dns/libidn2 )
	gpgme?         ( >=app-crypt/gpgme-0.9.0:= )
	slang?         ( sys-libs/slang )
	!slang?        ( >=sys-libs/ncurses-5.2:0= )
"
DEPEND="${CDEPEND}
	net-mail/mailbase
	doc? (
		dev-libs/libxml2
		dev-libs/libxslt
		app-text/docbook-xsl-stylesheets
		|| ( www-client/lynx www-client/w3m www-client/elinks )
	)"
RDEPEND="${CDEPEND}
	selinux? ( sec-policy/selinux-mutt )
	smime-classic? ( || ( dev-libs/libressl >=dev-libs/openssl-0.9.6:0 ) )
	pgp-classic? ( app-crypt/gnupg )
"

src_prepare() {
	local PATCHDIR="${WORKDIR}"/mutt-gentoo-${PV}-patches-${PATCHREV}

	if use !vanilla ; then
		# apply patches
		export EPATCH_FORCE="yes"
		export EPATCH_SUFFIX="patch"
		# http://hg.code.sf.net/p/gentoomuttpatches/code/file/mutt-1.10
		local patches=(
			patches-mutt
			bugs-gentoo
			features-common
			features-extra
			gentoo
		)
		local patchset
		for patchset in "${patches[@]}" ; do
			[[ -d "${PATCHDIR}/${patchset}" ]] || continue
			einfo "Patches for ${PATCHSET} patchset ${patchset}"
			EPATCH_SOURCE="${PATCHDIR}"/${patchset} epatch \
				|| die "patchset ${patchset} failed"
		done
		# add some explanation as to why not to go upstream
		sed -i \
			-e '/ReachingUs = N_(/aThis release of Mutt is heavily enriched with patches.\\nFor this reason, any bugs are better reported at https://bugs.gentoo.org/\\nor re-emerge with USE=vanilla and try to reproduce your problem.\\n\\' \
			main.c || die "Failed to add bug instructions"
	fi

	local upatches=
	# allow user patches
	eapply_user && upatches=" with user patches"

	# patch version string for bug reports
	local patchset=
	use vanilla || patchset=", ${PATCHSET}"
	sed -i -e 's|"Mutt %s (%s)"|"Mutt %s (%s'"${patchset}${upatches}"')"|' \
		muttlib.c || die "failed patching in Gentoo version"

	# many patches touch the buildsystem, we always need this
	AT_M4DIR="m4" eautoreconf

	# the configure script contains some "cleverness" whether or not to setgid
	# the dotlock program, resulting in bugs like #278332
	sed -i -e 's/@DOTLOCK_GROUP@//' Makefile.in || die "sed failed"
}

src_configure() {
	local myconf=(
		# signing and encryption
		$(use_enable pgp-classic pgp)
		$(use_enable smime-classic smime)
		$(use_enable gpgme)

		# features
		$(use_enable debug)
		$(use_enable doc)
		$(use_enable nls)

		# protocols
		$(use_enable imap)
		$(use_enable pop)
		$(use_enable smtp)

		$(use  ssl && use  gnutls && echo --with-gnutls    --without-ssl)
		$(use  ssl && use !gnutls && echo --without-gnutls --with-ssl   )
		$(use !ssl &&                echo --without-gnutls --without-ssl)

		$(use_with sasl)
		$(use_with idn idn2) --without-idn  # avoid automagic libidn dep
		$(use_with kerberos gss)
		"$(use slang && echo --with-slang="${EPREFIX}"/usr || echo a=b)"
		"$(use_with !slang curses "${EPREFIX}"/usr)"

		"--enable-compressed"
		"--enable-external-dotlock"
		"--enable-iconv"
		"--enable-nfs-fix"
		"--enable-sidebar"
		"--sysconfdir=${EPREFIX}/etc/${PN}"
		"--with-docdir=${EPREFIX}/usr/share/doc/${PN}-${PVR}"
		"--without-bundled-regex"     # use the implementation from libc
		"--with-exec-shell=${EPREFIX}/bin/sh"
	)

	if [[ ${CHOST} == *-solaris2.* && ${CHOST#*-solaris2.} -le 10 ]] ; then
		# arrows in index view do not show when using wchar_t
		# or misalign due to wrong computations
		myconf+=( "--without-wc-funcs" )
	fi

	# note: REQUIRED_USE should have selected only one of these, but for
	# bug #607360 we're forced to allow multiple.  For that reason, this
	# list is ordered to preference, and only the first is taken.
	local hcaches=(
		"lmdb"
		"qdbm"
		"tokyocabinet"
		"gdbm"
		"berkdb:bdb"
	)
	local ucache hcache lcache
	for hcache in "${hcaches[@]}" ; do
		if use ${hcache%%:*} ; then
			ucache=${hcache}
			break
		fi
	done
	if [[ -n ${ucache} ]] ; then
		myconf+=( "--enable-hcache" )
	else
		myconf+=( "--disable-hcache" )
	fi
	for hcache in "${hcaches[@]}" ; do
		[[ ${hcache} == ${ucache} ]] \
			&& myconf+=( "--with-${hcache#*:}" ) \
			|| myconf+=( "--without-${hcache#*:}" )
	done

	if use mbox; then
		myconf+=( "--with-mailpath=${EPREFIX}/var/spool/mail" )
	else
		myconf+=( "--with-homespool=Maildir" )
	fi

	econf "${myconf[@]}" || die "configure failed"
}

src_install() {
	emake DESTDIR="${D}" install || die "install failed"
	if use mbox; then
		insinto /etc/mutt
		newins "${FILESDIR}"/Muttrc.mbox Muttrc
	else
		insinto /etc/mutt
		doins "${FILESDIR}"/Muttrc
	fi

	# A newer file is provided by app-misc/mime-types. So we link it.
	rm "${ED}"/etc/${PN}/mime.types
	dosym "${EPREFIX}"/etc/mime.types /etc/${PN}/mime.types

	# nuke manpages that should be provided by an MTA, bug #177605
	rm "${ED}"/usr/share/man/man5/{mbox,mmdf}.5 \
		|| ewarn "failed to remove files, please file a bug"

	if use !prefix ; then
		fowners root:mail /usr/bin/mutt_dotlock
		fperms g+s /usr/bin/mutt_dotlock
	fi

	dodoc BEWARE COPYRIGHT ChangeLog NEWS OPS* PATCHES README* TODO VERSION
}

pkg_postinst() {
	if [[ -z ${REPLACING_VERSIONS} ]] ; then
		echo
		elog "If you are new to mutt you may want to take a look at"
		elog "the Gentoo QuickStart Guide to Mutt E-Mail:"
		elog "   https://wiki.gentoo.org/wiki/Mutt"
		echo
	else
		ewarn "The nntp and notmuch patches were dropped from this release."
		ewarn "Due to too much maintenance cost, the nntp and notmuch patches"
		ewarn "were dropped from this release.  If you need support for any"
		ewarn "of these features, please consider using mail-client/neomutt."
		echo
	fi
	if use !pgp-classic && use !smime-classic && use !gpgme ; then
		ewarn "Please note that crypto related USE-flags of Mutt have changed."
		ewarn "To comply with PMS, the following USE-flags were renamed:"
		ewarn "(see https://bugs.gentoo.org/695078)"
		ewarn "  pgp_classic   -> pgp-classic"
		ewarn "  smime_classic -> smime-classic"
		echo
	fi
	if use gpgme ; then
		ewarn "Note: in order for Mutt to actually use the gpgme backend"
		ewarn "      you MUST include 'set crypt_use_gpgme=yes' in .muttrc"
		# https is broken due to a certificate mismatch :(
		ewarn "      http://www.mutt.org/doc/manual/#crypt-use-gpgme"
	fi
}