proj/gentoo: Initial commit

This commit represents a new era for Gentoo:
Storing the gentoo-x86 tree in Git, as converted from CVS.

This commit is the start of the NEW history.
Any historical data is intended to be grafted onto this point.

Creation process:
1. Take final CVS checkout snapshot
2. Remove ALL ChangeLog* files
3. Transform all Manifests to thin
4. Remove empty Manifests
5. Convert all stale $Header$/$Id$ CVS keywords to non-expanded Git $Id$
5.1. Do not touch files with -kb/-ko keyword flags.

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
X-Thanks: Alec Warner <antarus@gentoo.org> - did the GSoC 2006 migration tests
X-Thanks: Robin H. Johnson <robbat2@gentoo.org> - infra guy, herding this project
X-Thanks: Nguyen Thai Ngoc Duy <pclouds@gentoo.org> - Former Gentoo developer, wrote Git features for the migration
X-Thanks: Brian Harring <ferringb@gentoo.org> - wrote much python to improve cvs2svn
X-Thanks: Rich Freeman <rich0@gentoo.org> - validation scripts
X-Thanks: Patrick Lauer <patrick@gentoo.org> - Gentoo dev, running new 2014 work in migration
X-Thanks: Michał Górny <mgorny@gentoo.org> - scripts, QA, nagging
X-Thanks: All of other Gentoo developers - many ideas and lots of paint on the bikeshed

1 files changed, 143 insertions, 0 deletions

diff --git a/eclass/alternatives.eclass b/eclass/alternatives.eclass
new file mode 100644
index 000000000000..62633dc63e22
--- /dev/null
+++ b/eclass/alternatives.eclass
@@ -0,0 +1,143 @@
+# Copyright 1999-2013 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+# @ECLASS: alternatives.eclass
+# @AUTHOR:
+# Original author: Alastair Tse <liquidx@gentoo.org> (03 Oct 2003)
+# @BLURB: Creates symlink to the latest version of multiple slotted packages.
+# @DESCRIPTION:
+# When a package is SLOT'ed, very often we need to have a symlink to the
+# latest version. However, depending on the order the user has merged them,
+# more often than not, the symlink maybe clobbered by the older versions.
+#
+# This eclass provides a convenience function that needs to be given a
+# list of alternatives (descending order of recent-ness) and the symlink.
+# It will choose the latest version it can find installed and create
+# the desired symlink.
+#
+# There are two ways to use this eclass. First is by declaring two variables
+# $SOURCE and $ALTERNATIVES where $SOURCE is the symlink to be created and
+# $ALTERNATIVES is a list of alternatives. Second way is the use the function
+# alternatives_makesym() like the example below.
+# @EXAMPLE:
+# pkg_postinst() {
+#     alternatives_makesym "/usr/bin/python" "/usr/bin/python2.3" "/usr/bin/python2.2"
+# }
+#
+# The above example will create a symlink at /usr/bin/python to either
+# /usr/bin/python2.3 or /usr/bin/python2.2. It will choose python2.3 over
+# python2.2 if both exist.
+#
+# Alternatively, you can use this function:
+#
+# pkg_postinst() {
+#    alternatives_auto_makesym "/usr/bin/python" "/usr/bin/python[0-9].[0-9]"
+# }
+#
+# This will use bash pathname expansion to fill a list of alternatives it can
+# link to. It is probably more robust against version upgrades. You should
+# consider using this unless you are want to do something special.
+
+# @ECLASS-VARIABLE: SOURCE
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# The symlink to be created
+
+# @ECLASS-VARIABLE: ALTERNATIVES
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# The list of alternatives
+
+# @FUNCTION: alternatives_auto_makesym
+# @DESCRIPTION:
+# automatic deduction based on a symlink and a regex mask
+alternatives_auto_makesym() {
+	has "${EAPI:-0}" 0 1 2 && ! use prefix && EROOT="${ROOT}"
+	local SYMLINK REGEX ALT myregex
+	SYMLINK=$1
+	REGEX=$2
+	if [ "${REGEX:0:1}" != "/" ]
+	then
+		#not an absolute path:
+		#inherit the root directory of our main link path for our regex search
+		myregex="${SYMLINK%/*}/${REGEX}"
+	else
+		myregex=${REGEX}
+	fi
+
+	# sort a space delimited string by converting it to a multiline list
+	# and then run sort -r over it.
+	# make sure we use ${EROOT} because otherwise stage-building will break
+	ALT="$(for i in $(echo ${EROOT}${myregex}); do echo ${i#${EROOT}}; done | sort -r)"
+	alternatives_makesym ${SYMLINK} ${ALT}
+}
+
+alternatives_makesym() {
+	has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
+	local ALTERNATIVES=""
+	local SYMLINK=""
+	local alt pref
+
+	# usage: alternatives_makesym <resulting symlink> [alternative targets..]
+	# make sure it is in the prefix, allow it already to be in the prefix
+	SYMLINK=${EPREFIX}/${1#${EPREFIX}}
+	# this trick removes the trailing / from ${ROOT}
+	pref=${ROOT%/}
+	shift
+	ALTERNATIVES=$@
+
+	# step through given alternatives from first to last
+	# and if one exists, link it and finish.
+
+	for alt in ${ALTERNATIVES}; do
+		alt=${EPREFIX}/${alt#${EPREFIX}}
+		if [ -f "${pref}${alt}" ]; then
+			#are files in same directory?
+			if [ "${alt%/*}" = "${SYMLINK%/*}" ]
+			then
+				#yes; strip leading dirname from alt to create relative symlink
+				einfo "Linking ${alt} to ${pref}${SYMLINK} (relative)"
+				ln -sf ${alt##*/} ${pref}${SYMLINK}
+			else
+				#no; keep absolute path
+				einfo "Linking ${alt} to ${pref}${SYMLINK} (absolute)"
+				ln -sf ${pref}${alt} ${pref}${SYMLINK}
+			fi
+			break
+		fi
+	done
+
+	# report any errors
+	if [ ! -L ${pref}${SYMLINK} ]; then
+		ewarn "Unable to establish ${pref}${SYMLINK} symlink"
+	else
+		# we need to check for either the target being in relative path form
+		# or absolute path form
+		if [ ! -f "`dirname ${pref}${SYMLINK}`/`readlink ${pref}${SYMLINK}`" -a \
+			 ! -f "`readlink ${pref}${SYMLINK}`" ]; then
+			ewarn "Removing dead symlink ${pref}${SYMLINK}"
+			rm -f ${pref}${SYMLINK}
+		fi
+	fi
+}
+
+# @FUNCTION: alernatives-pkg_postinst
+# @DESCRIPTION:
+# The alternatives pkg_postinst, this function will be exported
+alternatives_pkg_postinst() {
+	if [ -n "${ALTERNATIVES}" -a -n "${SOURCE}" ]; then
+		alternatives_makesym ${SOURCE} ${ALTERNATIVES}
+	fi
+}
+
+# @FUNCTION: alternatives_pkg_postrm
+# @DESCRIPTION:
+# The alternatives pkg_postrm, this function will be exported
+alternatives_pkg_postrm() {
+	if [ -n "${ALTERNATIVES}" -a -n "${SOURCE}" ]; then
+		alternatives_makesym ${SOURCE} ${ALTERNATIVES}
+	fi
+}
+
+EXPORT_FUNCTIONS pkg_postinst pkg_postrm