Introduce the ebuild for making /etc/resolv.conf a symlink.

(Portage version: 2.2.0_alpha51_p4/cvs/Linux x86_64)

3 files changed, 76 insertions, 0 deletions

diff --git a/net-dns/resolvconf-symlink/ChangeLog b/net-dns/resolvconf-symlink/ChangeLog
new file mode 100644
index 000000000000..56077754d51d
--- /dev/null
+++ b/net-dns/resolvconf-symlink/ChangeLog
@@ -0,0 +1,10 @@
+# ChangeLog for net-dns/resolvconf-symlink
+# Copyright 1999-2011 Gentoo Foundation; Distributed under the GPL v2
+# $Header: /var/cvsroot/gentoo-x86/net-dns/resolvconf-symlink/ChangeLog,v 1.1 2011/08/22 08:37:26 mgorny Exp $
+
+*resolvconf-symlink-0 (22 Aug 2011)
+
+  22 Aug 2011; Michał Górny <mgorny@gentoo.org> +resolvconf-symlink-0.ebuild,
+  +metadata.xml:
+  Introduce the ebuild for making /etc/resolv.conf a symlink.
+
diff --git a/net-dns/resolvconf-symlink/metadata.xml b/net-dns/resolvconf-symlink/metadata.xml
new file mode 100644
index 000000000000..2e823effb84a
--- /dev/null
+++ b/net-dns/resolvconf-symlink/metadata.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<herd>no-herd</herd>
+	<maintainer>
+		<email>mgorny@gentoo.org</email>
+		<name>Michał Górny</name>
+	</maintainer>
+	<use>
+		<flag name='symlink'>Actually replace /etc/resolv.conf with a
+			symlink. Without this flag, the ebuild is a no-op.</flag>
+	</use>
+</pkgmetadata>
diff --git a/net-dns/resolvconf-symlink/resolvconf-symlink-0.ebuild b/net-dns/resolvconf-symlink/resolvconf-symlink-0.ebuild
new file mode 100644
index 000000000000..9670b0aee61e
--- /dev/null
+++ b/net-dns/resolvconf-symlink/resolvconf-symlink-0.ebuild
@@ -0,0 +1,53 @@
+# Copyright 1999-2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/net-dns/resolvconf-symlink/resolvconf-symlink-0.ebuild,v 1.1 2011/08/22 08:37:26 mgorny Exp $
+
+EAPI=4
+
+DESCRIPTION="Make /etc/resolv.conf a symlink to a runtime-writable location"
+HOMEPAGE="http://www.gentoo.org"
+SRC_URI=""
+
+LICENSE="as-is"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="+symlink"
+
+S=${WORKDIR}
+
+pkg_preinst() {
+	if use symlink; then
+		if [[ -f "${ROOT}"etc/resolv.conf && ! -L "${ROOT}"etc/resolv.conf ]]
+		then # migrate existing resolv.conf
+			if [[ "$(head -n 1 "${ROOT}"etc/resolv.conf)" \
+					!= "# Generated by "* ]]; then
+
+				eerror "${ROOT}etc/resolv.conf seems not to be autogenerated."
+				eerror "Aborting build to avoid removing user data. If that file is supposed"
+				eerror "to be autogenerated, please remove it manually. Otherwise, please"
+				eerror "set USE=-symlink to avoid installing resolv.conf symlink."
+
+				die "${ROOT}etc/resolv.conf not autogenerated"
+			else
+				ebegin "Moving ${ROOT}etc/resolv.conf to ${ROOT}var/run/"
+				mv "${ROOT}"etc/resolv.conf "${ROOT}"var/run/
+				eend ${?} || die
+			fi
+		fi
+	fi
+}
+
+src_install() {
+	# XXX: /run should be more correct, when it's supported by baselayout
+
+	use symlink && dosym /var/run/resolv.conf /etc/resolv.conf
+}
+
+pkg_postrm() {
+	# Don't leave the user with no resolv.conf
+	if [[ ! -e "${ROOT}"etc/resolv.conf && -f "${ROOT}"var/run/resolv.conf ]]; then
+		ebegin "Moving ${ROOT}var/run/resolv.conf to ${ROOT}etc/"
+		mv "${ROOT}"var/run/resolv.conf "${ROOT}"etc/
+		eend ${?} || die
+	fi
+}