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|
#!/bin/bash
# $Header$
# bash replacement for the original euse by Arun Bhanu
# Author: Marius Mauch <genone@gentoo.org>
# Version: 0.2
# Licensed under the GPL v2
PROGRAM_NAME=euse
PROGRAM_VERSION=0.1
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 | --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
${PROGRAM_NAME} v${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
${PROGRAM_NAME} v${PROGRAM_VERSION}
Written by Marius Mauch
Copyright (C) 2004-2008 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
|