From: Michał Górny <mgorny@gentoo.org>
Date: Wed, 13 Dec 2017 09:13:23 +0000 (+0100)
Subject: app-arch/xz-utils: Support disabling unnecessary filters
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=e082cbd69d9b535ab62e89360efd3aac1f5f3115;p=gentoo.git

app-arch/xz-utils: Support disabling unnecessary filters

Closes: https://bugs.gentoo.org/641488
Closes: https://github.com/gentoo/gentoo/pull/6547
Signed-off-by: Thomas Deutschmann <whissi@gentoo.org>
---

diff --git a/app-arch/xz-utils/metadata.xml b/app-arch/xz-utils/metadata.xml
index 56c124413057..fac09b73379a 100644
--- a/app-arch/xz-utils/metadata.xml
+++ b/app-arch/xz-utils/metadata.xml
@@ -5,4 +5,9 @@
 	<email>base-system@gentoo.org</email>
 	<name>Gentoo Base System</name>
 </maintainer>
+<use>
+	<flag name='extra-filters'>Build additional filters that are not
+		used in any of the default xz presets. This includes delta
+		and BCJ coders, additional match finders and SHA256 checks.</flag>
+</use>
 </pkgmetadata>
diff --git a/app-arch/xz-utils/xz-utils-5.2.3.ebuild b/app-arch/xz-utils/xz-utils-5.2.3.ebuild
index f15ced82058d..bd59ee3b45a7 100644
--- a/app-arch/xz-utils/xz-utils-5.2.3.ebuild
+++ b/app-arch/xz-utils/xz-utils-5.2.3.ebuild
@@ -27,7 +27,7 @@ HOMEPAGE="http://tukaani.org/xz/"
 # See top-level COPYING file as it outlines the various pieces and their licenses.
 LICENSE="public-domain LGPL-2.1+ GPL-2+"
 SLOT="0"
-IUSE="elibc_FreeBSD nls static-libs +threads"
+IUSE="elibc_FreeBSD +extra-filters nls static-libs +threads"
 
 RDEPEND="!<app-arch/lzma-4.63
 	!app-arch/lzma-utils
@@ -35,6 +35,9 @@ RDEPEND="!<app-arch/lzma-4.63
 DEPEND="${RDEPEND}
 	${EXTRA_DEPEND}"
 
+# Tests currently do not account for smaller feature set
+RESTRICT="!extra-filters? ( test )"
+
 src_prepare() {
 	if [[ ${PV} == "9999" ]] ; then
 		eautopoint
@@ -52,6 +55,17 @@ multilib_src_configure() {
 	)
 	multilib_is_native_abi ||
 		myconf+=( --disable-{xz,xzdec,lzmadec,lzmainfo,lzma-links,scripts} )
+	if ! use extra-filters; then
+		myconf+=(
+			# LZMA1 + LZMA2 for standard .lzma & .xz files
+			--enable-encoders=lzma1,lzma2
+			--enable-decoders=lzma1,lzma2
+			# those are used by default, depending on preset
+			--enable-match-finders=hc3,hc4,bt4
+			# CRC64 is used by default, though some (old?) files use CRC32
+			--enable-checks=crc32,crc64
+		)
+	fi
 
 	use elibc_FreeBSD && export ac_cv_header_sha256_h=no #545714
 	ECONF_SOURCE="${S}" econf "${myconf[@]}"
diff --git a/app-arch/xz-utils/xz-utils-9999.ebuild b/app-arch/xz-utils/xz-utils-9999.ebuild
index e437466c00f9..1fe45b2c25ed 100644
--- a/app-arch/xz-utils/xz-utils-9999.ebuild
+++ b/app-arch/xz-utils/xz-utils-9999.ebuild
@@ -27,7 +27,7 @@ HOMEPAGE="http://tukaani.org/xz/"
 # See top-level COPYING file as it outlines the various pieces and their licenses.
 LICENSE="public-domain LGPL-2.1+ GPL-2+"
 SLOT="0"
-IUSE="elibc_FreeBSD nls static-libs +threads"
+IUSE="elibc_FreeBSD +extra-filters nls static-libs +threads"
 
 RDEPEND="!<app-arch/lzma-4.63
 	!app-arch/lzma-utils
@@ -35,6 +35,9 @@ RDEPEND="!<app-arch/lzma-4.63
 DEPEND="${RDEPEND}
 	${EXTRA_DEPEND}"
 
+# Tests currently do not account for smaller feature set
+RESTRICT="!extra-filters? ( test )"
+
 src_prepare() {
 	if [[ ${PV} == "9999" ]] ; then
 		eautopoint
@@ -52,6 +55,17 @@ multilib_src_configure() {
 	)
 	multilib_is_native_abi ||
 		myconf+=( --disable-{xz,xzdec,lzmadec,lzmainfo,lzma-links,scripts} )
+	if ! use extra-filters; then
+		myconf+=(
+			# LZMA1 + LZMA2 for standard .lzma & .xz files
+			--enable-encoders=lzma1,lzma2
+			--enable-decoders=lzma1,lzma2
+			# those are used by default, depending on preset
+			--enable-match-finders=hc3,hc4,bt4
+			# CRC64 is used by default, though some (old?) files use CRC32
+			--enable-checks=crc32,crc64
+		)
+	fi
 
 	use elibc_FreeBSD && export ac_cv_header_sha256_h=no #545714
 	ECONF_SOURCE="${S}" econf "${myconf[@]}"