From c819d146be6bce86d97019494173253e71b85d2f Mon Sep 17 00:00:00 2001
From: fuzzyray <fuzzyray@gentoo.org>
Date: Tue, 5 May 2009 17:39:24 +0000
Subject: Rearrange trunk to support gentoolkit version 0.3.  Split into
 gentoolkit, gentoolkit-dev, and deprecated.  Import djanderson's work on the
 gentoolkit library and equery

svn path=/trunk/gentoolkit/; revision=589
---
 bin/euse | 547 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 547 insertions(+)
 create mode 100755 bin/euse

(limited to 'bin/euse')

diff --git a/bin/euse b/bin/euse
new file mode 100755
index 0000000..b49b120
--- /dev/null
+++ b/bin/euse
@@ -0,0 +1,547 @@
+#!/bin/bash
+
+# $Header$
+
+# bash replacement for the original euse by Arun Bhanu
+# Author: Marius Mauch <genone@gentoo.org>
+# Licensed under the GPL v2
+
+PROGRAM_NAME=euse
+PROGRAM_VERSION=$(cat /etc/gentoolkit-version)
+
+MAKE_CONF_PATH=/etc/make.conf
+MAKE_GLOBALS_PATH=/etc/make.globals
+MAKE_PROFILE_PATH=/etc/make.profile
+MAKE_CONF_BACKUP_PATH=/etc/make.conf.euse_backup
+
+[ -z "${MODE}" ] && MODE="showhelp"		# available operation modes: showhelp, showversion, showdesc, showflags, modify
+
+parse_arguments() {
+	if [ -z "${1}" ]; then
+		return
+	fi
+	while [ -n "${1}" ]; do
+		case "${1}" in
+			-h | --help)           MODE="showhelp";;
+			-V | -v | --version)   MODE="showversion";;
+			-i | --info)           MODE="showdesc";;
+			-I | --info-installed) MODE="showinstdesc";;
+			-l | --local)          SCOPE="local";;
+			-g | --global)         SCOPE="global";;
+			-a | --active)         MODE="showflags";;
+			-E | --enable)         MODE="modify"; ACTION="add";;
+			-D | --disable)        MODE="modify"; ACTION="remove";;
+			-P | --prune)          MODE="modify"; ACTION="prune";;
+			-*)
+				echo "ERROR: unknown option ${1} specified."
+				echo
+				MODE="showhelp"
+				;;
+			"%active")
+				get_useflags
+				ARGUMENTS="${ARGUMENTS} ${ACTIVE_FLAGS[9]}"
+				;;
+			*)
+				ARGUMENTS="${ARGUMENTS} ${1}"
+				;;
+		esac
+		shift
+	done
+}
+
+error() {
+	echo "ERROR: ${1}"
+	set +f
+	exit 1
+}
+
+get_real_path() {
+	set -P
+	cd "$1"
+	pwd
+	cd "$OLDPWD"
+	set +P
+}
+
+check_sanity() {
+	# file permission tests
+	local descdir
+	local make_defaults
+	
+	descdir="$(get_portdir)/profiles"
+	
+	[ ! -r "${MAKE_CONF_PATH}" ] && error "${MAKE_CONF_PATH} is not readable"
+	[ ! -r "${MAKE_GLOBALS_PATH}" ] && error "${MAKE_GLOBALS_PATH} is not readable"
+	[ ! -h "${MAKE_PROFILE_PATH}" ] && error "${MAKE_PROFILE_PATH} is not a symlink"
+	[ -z "$(get_portdir)" ] && error "\$PORTDIR couldn't be determined"
+	[ ! -d "${descdir}" ] && error "${descdir} does not exist or is not a directory"
+	[ ! -r "${descdir}/use.desc" ] && error "${descdir}/use.desc is not readable"
+	[ ! -r "${descdir}/use.local.desc" ] && error "${descdir}/use.local.desc is not readable"
+	for make_defaults in $(get_all_make_defaults); do
+		[ ! -r "$make_defaults" ]  && error "$_make_defaults is not readable"
+	done
+#	[ ! -r "$(get_make_defaults)" ] && error "$(get_make_defaults) is not readable"
+	[ "${MODE}" == "modify" -a ! -w "${MAKE_CONF_PATH}" ] && error ""${MAKE_CONF_PATH}" is not writable"
+}
+
+showhelp() {
+cat << HELP
+${PROGRAM_NAME} (${PROGRAM_VERSION})
+
+Syntax: ${PROGRAM_NAME} <option> [suboptions] [useflaglist]
+
+Options: -h, --help           - show this message
+         -V, --version        - show version information
+         -i, --info           - show descriptions for the given useflags
+         -I, --info-installed - show descriptions for the given useflags and
+                                their current impact on the installed system
+         -g, --global         - show only global use flags (suboption)
+         -l, --local          - show only local use flags (suboption)
+         -a, --active         - show currently active useflags and their origin
+         -E, --enable         - enable the given useflags
+         -D, --disable        - disable the given useflags
+         -P, --prune          - remove all references to the given flags from
+                                make.conf to revert to default settings
+
+Notes: ${PROGRAM_NAME} currently only works for global flags defined
+       in make.globals, make.defaults or make.conf, it doesn't handle
+       use.defaults, use.mask or package.use yet (see portage(5) for details on
+       these files). It also might have issues with cascaded profiles.
+       If multiple options are specified only the last one will be used.
+HELP
+}
+
+showversion() {
+cat << VER
+${PROGRAM_NAME} (${PROGRAM_VERSION})
+Written by Marius Mauch
+
+Copyright (C) 2004-2009 Gentoo Foundation, Inc.
+This is free software; see the source for copying conditions.
+VER
+}
+
+# remove duplicate flags from the given list in both positive and negative forms
+# (but unlike portage always keep the last value even if it's negative)
+# Otherwise the status flags could be incorrect if a flag appers multiple times in
+# one location (like make.conf).
+# Using python here as bash sucks for list handling.
+# NOTE: bash isn't actually that bad at handling lists -- sh is. This may be
+#       worth another look to avoid calling python unnecessariy. Or we could
+#       just write the whole thing in python. ;)
+reduce_incrementals() {
+	echo $@ | python -c "import sys
+r=[]
+for x in sys.stdin.read().split():
+	if x[0] == '-' and x[1:] in r:
+		r.remove(x[1:])
+		r.append(x)
+	elif x[0] != '-' and '-'+x in r:
+		r.remove('-'+x)
+		r.append(x)
+	elif x == '-*':
+		r = []
+		r.append(x)
+	elif x not in r:
+		r.append(x)
+print ' '.join(r)" 
+}
+
+# the following function creates a bash array ACTIVE_FLAGS that contains the
+# global use flags, indexed by origin: 0: environment, 1: make.conf, 
+# 2: make.defaults, 3: make.globals
+get_useflags() {
+	# only calculate once as calling emerge is painfully slow
+	[ -n "${USE_FLAGS_CALCULATED}" ] && return
+	
+	# backup portdir so get_portdir() doesn't give false results later
+	portdir_backup="${PORTDIR}"
+
+	ACTIVE_FLAGS[0]="$(reduce_incrementals ${USE})"
+	USE=""
+	source "${MAKE_CONF_PATH}"
+	ACTIVE_FLAGS[1]="$(reduce_incrementals ${USE})"
+	USE=""
+	for x in $(get_all_make_defaults); do
+		source "${x}"
+		ACTIVE_FLAGS[2]="$(reduce_incrementals ${ACTIVE_FLAGS[2]} ${USE})"
+	done
+	USE=""
+	source "${MAKE_GLOBALS_PATH}"
+	ACTIVE_FLAGS[3]="$(reduce_incrementals ${USE})"
+
+	# restore saved env variables
+	USE="${ACTIVE_FLAGS[0]}"
+	PORTDIR="${portdir_backup}"
+
+	# get the currently active USE flags as seen by portage, this has to be after
+	# restoring USE or portage won't see the original environment
+	ACTIVE_FLAGS[9]="$(emerge --info | grep 'USE=' | cut -b 5- | sed -e 's:"::g')" #'
+	USE_FLAGS_CALCULATED=1
+}
+
+# get the list of all known USE flags by reading use.desc and/or use.local.desc
+# (depending on the value of $SCOPE)
+get_useflaglist() {
+	local descdir
+
+	descdir="$(get_portdir)/profiles"
+	
+	if [ -z "${SCOPE}" -o "${SCOPE}" == "global" ]; then
+		egrep "^[^# ]+ +-" "${descdir}/use.desc" | cut -d\  -f 1
+	fi
+	if [ -z "${SCOPE}" -o "${SCOPE}" == "local" ]; then
+		egrep "^[^# :]+:[^ ]+ +-" "${descdir}/use.local.desc" | cut -d: -f 2 | cut -d\  -f 1
+	fi
+}
+
+# get all make.defaults by traversing the cascaded profile directories
+get_all_make_defaults() {
+	local curdir
+	local parent
+	local rvalue
+	
+	curdir="${1:-$(get_real_path ${MAKE_PROFILE_PATH})}"
+	
+	[ -f "${curdir}/make.defaults" ] && rvalue="${curdir}/make.defaults ${rvalue}"
+	if [ -f "${curdir}/parent" ]; then
+		for parent in $(egrep -v '(^#|^ *$)' ${curdir}/parent); do
+			pdir="$(get_real_path ${curdir}/${parent})"
+			rvalue="$(get_all_make_defaults ${pdir}) ${rvalue}"
+		done
+	fi
+
+	echo "${rvalue}"
+}
+
+# get the path to make.defaults by traversing the cascaded profile directories
+get_make_defaults() {
+	local curdir
+	local parent
+	
+	curdir="${1:-$(get_real_path ${MAKE_PROFILE_PATH})}"
+	
+	if [ ! -f "${curdir}/make.defaults" -a -f "${curdir}/parent" ]; then
+		for parent in $(egrep -v '(^#|^ *$)' ${curdir}/parent); do
+			if [ -f "$(get_make_defaults ${curdir}/${parent})" ]; then
+				curdir="${curdir}/${parent}"
+				break
+			fi
+		done
+	fi
+
+	echo "${curdir}/make.defaults"
+}
+
+# little helper function to get the status of a given flag in one of the 
+# ACTIVE_FLAGS elements. Arguments are 1: flag to test, 2: index of ACTIVE_FLAGS,
+# 3: echo value for positive (and as lowercase for negative) test result, 
+# 4 (optional): echo value for "missing" test result, defaults to blank
+get_flagstatus_helper() {
+	if echo " ${ACTIVE_FLAGS[${2}]} " | grep " ${1} " > /dev/null; then
+		echo -n "${3}"
+	elif echo " ${ACTIVE_FLAGS[${2}]} " | grep " -${1} " > /dev/null; then
+		echo -n "$(echo ${3} | tr [[:upper:]] [[:lower:]])"
+	else
+		echo -n "${4:- }"
+	fi
+}
+
+# prints a status string for the given flag, each column indicating the presence
+# for portage, in the environment, in make.conf, in make.defaults and in make.globals.
+# full positive value would be "[+ECDG]", full negative value would be [-ecdg],
+# full missing value would be "[-    ]" (portage only sees present or not present)
+get_flagstatus() {
+	get_useflags
+
+	echo -n '['
+	get_flagstatus_helper "${1}" 9 "+" "-"
+	get_flagstatus_helper "${1}" 0 "E"
+	get_flagstatus_helper "${1}" 1 "C"
+	get_flagstatus_helper "${1}" 2 "D"
+	get_flagstatus_helper "${1}" 3 "G"
+	echo -n '] '
+}
+
+# faster replacement to `portageq portdir`
+get_portdir() {
+	if [ -z "${PORTDIR}" ]; then
+		use_backup="${USE}"
+		source "${MAKE_GLOBALS_PATH}"
+		for x in $(get_all_make_defaults); do
+			source "${x}"
+		done
+		source "${MAKE_CONF_PATH}"
+		USE="${use_backup}"
+	fi
+	echo "${PORTDIR}"
+}
+
+# This function takes a list of use flags and shows the status and 
+# the description for each one, honoring $SCOPE
+showdesc() {
+	local descdir
+	local current_desc
+	local found_one
+	local args
+	
+	args="${*:-*}"
+	
+	if [ -z "${SCOPE}" ]; then
+		SCOPE="global" showdesc ${args}
+		echo
+		SCOPE="local" showdesc ${args}
+		return
+	fi
+	
+	descdir="$(get_portdir)/profiles"
+	
+	[ "${SCOPE}" == "global" ] && echo "global use flags (searching: ${args})"
+	[ "${SCOPE}" == "local" ] && echo "local use flags (searching: ${args})"
+	echo "************************************************************"
+	
+	if [ "${args}" == "*" ]; then
+		args="$(get_useflaglist | sort -u)"
+	fi
+	
+	set ${args}
+	
+	foundone=0
+	while [ -n "${1}" ]; do
+		if [ "${SCOPE}" == "global" ]; then
+			if grep "^${1}  *-" "${descdir}/use.desc" > /dev/null; then
+				get_flagstatus "${1}"
+				foundone=1
+			fi
+			grep "^${1}  *-" "${descdir}/use.desc"
+		fi
+		# local flags are a bit more complicated as there can be multiple 
+		# entries per flag and we can't pipe into printf
+		if [ "${SCOPE}" == "local" ]; then
+			if grep ":${1}  *-" "${descdir}/use.local.desc" > /dev/null; then
+				foundone=1
+			fi
+			grep ":${1}  *-" "${descdir}/use.local.desc" \
+				| sed -e "s/^\([^:]\+\):\(${1}\) *- *\(.\+\)/\1|\2|\3/g" \
+				| while read line; do
+					pkg="$(echo $line | cut -d\| -f 1)"
+					flag="$(echo $line | cut -d\| -f 2)"
+					desc="$(echo $line | cut -d\| -f 3)"
+					get_flagstatus "${flag}"
+					printf "%s (%s):\n%s\n\n" "${flag}" "${pkg}" "${desc}"
+				done
+		fi
+		shift
+	done
+	
+	if [ ${foundone} == 0 ]; then
+		echo "no matching entries found"
+	fi
+}
+
+# Works like showdesc() but displays only descriptions of which the appropriate
+# ebuild is installed and prints the name of those packages.
+showinstdesc() {
+	local descdir
+	local current_desc
+	local args
+	local -i foundone=0
+	local IFS
+
+	args=("${@:-*}")
+
+	case "${SCOPE}" in
+		"global") echo "global use flags (searching: ${args})";;
+		 "local") echo "local use flags (searching: ${args})";;
+		       *) SCOPE="global" showinstdesc "${args[@]}"
+		          echo
+		          SCOPE="local" showinstdesc "${args[@]}"
+		          return;;
+	esac
+
+	descdir="$(get_portdir)/profiles"
+	echo "************************************************************"
+	
+	if [ "${args}" = "*" ]; then
+		args="$(get_useflaglist | sort -u)"
+	fi
+	
+	set "${args[@]}"
+	
+	while [ -n "${1}" ]; do
+		case "${SCOPE}" in
+			"global")
+				if desc=$(grep "^${1}  *-" "${descdir}/use.desc"); then
+					get_flagstatus "${1}"
+					echo "$desc"
+					# get list of installed packages matching this USE flag.
+					IFS=$'\n'
+					packages=($(equery -q -C hasuse -i "${1}" | awk '{ print $(NF-1) }'))
+					foundone+=${#packages[@]}
+					printf "\nInstalled packages matching this USE flag: "
+					if [ ${foundone} -gt 0 ]; then
+						echo $'\n'"${packages[*]}"
+					else
+						echo "none"
+					fi
+				fi
+			;;
+			"local")
+				# local flags are a bit more complicated as there can be multiple
+				# entries per flag and we can't pipe into printf
+				IFS=': ' # Use a space instead of a dash because dashes occur in cat/pkg
+				while read pkg flag desc; do
+					# print name only if package is installed
+					# NOTE: If we implement bug #114086 's enhancement we can just use the
+					#       exit status of equery instead of a subshell and pipe to wc -l
+					if [ $(equery -q -C list -i -e "${pkg}" | wc -l) -gt 0 ]; then
+						foundone=1
+						get_flagstatus "${flag}"
+						printf "%s (%s):\n%s\n\n" "${flag}" "${pkg}" "${desc#- }"
+					fi
+				done < <(grep ":${1}  *-" "${descdir}/use.local.desc")
+			;;
+		esac
+		shift
+	done
+	
+	if [ ${foundone} -lt 1 ]; then
+		echo "no matching entries found"
+	fi
+}
+
+# show a list of all currently active flags and where they are activated
+showflags() {
+	local args
+
+	get_useflags
+	
+	args="${*:-*}"
+	
+	if [ "${args}" == "*" ]; then
+		args="$(get_useflaglist | sort -u)"
+	fi
+	
+	set ${args}
+	
+	while [ -n "${1}" ]; do
+		if echo " ${ACTIVE_FLAGS[9]} " | grep " ${1} " > /dev/null; then
+			printf "%-20s" ${1}
+			get_flagstatus ${1}
+			echo
+		fi
+		shift
+	done
+}
+
+# two small helpers to add or remove a flag from a USE string
+add_flag() {
+	NEW_MAKE_CONF_USE="${NEW_MAKE_CONF_USE} ${1}"
+}
+
+remove_flag() {
+	NEW_MAKE_CONF_USE="${NEW_MAKE_CONF_USE// ${1} / }"
+}
+
+# USE flag modification function. Mainly a loop with calls to add_flag and 
+# remove_flag to create a new USE string which is then inserted into make.conf.
+modify() {
+	if [ -z "${*}" ]; then
+		if [ "${ACTION}" != "prune" ]; then
+			echo "WARNING: no USE flags listed for modification, do you really"
+			echo "         want to ${ACTION} *all* known USE flags?"
+			echo "         If you don't please press Ctrl-C NOW!!!"
+			sleep 5
+			set $(get_useflaglist | sort -u)
+		fi
+	fi
+	
+	get_useflags
+	
+	NEW_MAKE_CONF_USE=" ${ACTIVE_FLAGS[1]} "
+	
+	while [ -n "${1}" ]; do
+		if [ "${ACTION}" == "add" ]; then
+			if echo " ${NEW_MAKE_CONF_USE} " | grep " ${1} " > /dev/null; then
+				shift
+			elif echo " ${NEW_MAKE_CONF_USE} " | grep " -${1} " > /dev/null; then
+				remove_flag "-${1}"
+			else
+				add_flag "${1}"
+				shift
+			fi
+		elif [ "${ACTION}" == "remove" ]; then
+			if echo " ${NEW_MAKE_CONF_USE} " | grep " -${1} " > /dev/null; then
+				shift
+			elif echo " ${NEW_MAKE_CONF_USE} " | grep " ${1} " > /dev/null; then
+				remove_flag "${1}"
+			else
+				add_flag "-${1}"
+				shift
+			fi
+		elif [ "${ACTION}" == "prune" ]; then
+			if echo " ${NEW_MAKE_CONF_USE} " | grep " ${1} " > /dev/null; then
+				remove_flag "${1}"
+			elif echo " ${NEW_MAKE_CONF_USE} " | grep " -${1} " > /dev/null; then
+				remove_flag "-${1}"
+			fi
+			shift
+		fi
+	done
+	
+	#echo "old flags:"
+	#echo ${ACTIVE_FLAGS[1]}
+	#echo
+	#echo "new flags:"
+	#echo ${NEW_MAKE_CONF_USE}
+	
+	# a little loop to add linebreaks so we don't end with one ultra-long line
+	NEW_MAKE_CONF_USE_2=""
+	for x in ${NEW_MAKE_CONF_USE}; do
+		if [ $(((${#NEW_MAKE_CONF_USE_2}%70)+${#x}+2)) -gt 70 ]; then
+			NEW_MAKE_CONF_USE_2="${NEW_MAKE_CONF_USE_2}\\ \\n     $x "
+		else
+			NEW_MAKE_CONF_USE_2="${NEW_MAKE_CONF_USE_2}${x} "
+		fi
+	done
+
+	# make a backup just in case the user doesn't like the new make.conf
+	cp -p "${MAKE_CONF_PATH}" "${MAKE_CONF_BACKUP_PATH}"
+	
+	# as sed doesn't really work with multi-line patterns we have to replace USE
+	# on our own here. Basically just skip everything between USE=" and the 
+	# closing ", printing our new USE line there instead.
+	inuse=0
+	had_use=0
+	x=0
+	(while [ "$x" -eq "0" ]; do
+		read -r line
+		x="$?"
+		[ "${line:0:4}" == "USE=" ] && inuse=1
+		[ "${inuse}" == "0" ] && echo -E "${line}"
+		if [ "${inuse}" == "1" ] && echo "${line}" | egrep '" *(#.*)?$' > /dev/null; then
+			echo -n 'USE="'
+			echo -ne "${NEW_MAKE_CONF_USE_2%% }"
+			echo '"'
+		 	inuse=0
+			had_use=1
+		fi
+	done
+	if [ ${had_use} -eq 0 ]; then
+		echo -n 'USE="'
+		echo -ne "${NEW_MAKE_CONF_USE_2%% }"
+		echo '"'
+	fi ) < "${MAKE_CONF_BACKUP_PATH}" | sed -e 's:\\ $:\\:' > "${MAKE_CONF_PATH}"
+	
+	echo "${MAKE_CONF_PATH} was modified, a backup copy has been placed at ${MAKE_CONF_BACKUP_PATH}"
+}
+
+##### main program comes now #####
+
+# disable globbing as it fucks up with args=*
+set -f
+parse_arguments "$@"
+check_sanity
+
+eval ${MODE} ${ARGUMENTS}
+set +f
-- 
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