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#!/usr/bin/bash
#
# ENVML, setup environment with module then run specified command
# Copyright (C) 2015 CEA/DAM
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
##########################################################################
typeset progpath=$0
typeset prog=${progpath##*/}
typeset arg
typeset subarg
typeset kind_of_arg='mod'
typeset -a modarglist=()
typeset -a maymodarglist=()
typeset -a maycmdarglist=()
typeset -a cmdarglist=()
# print message on stderr then exit
echo_error() {
echo "$prog: $1" >&2
exit 1
}
arg_into_modaction() {
# split module action from its argument
local action="${1/=/ }"
# split multiple arguments
if [ "${action//;/ }" == "${action}" ]; then
action="${action//&/ }"
else
# enable arg split over ';' to enable same behavior than envml.cmd
action="${action//;/ }"
fi
case "$action" in
purge*|restore*|unload*|switch*|load*) echo "$action" ;;
*) echo "load $action" ;;
esac
}
# print usage message
echo_usage() {
echo "Usage: $progpath [MODULE_ACTION]... [--] COMMAND [ARG]...
Run MODULE_ACTION(s) to setup environment then run COMMAND.
Syntax of supported MODULE_ACTIONs:
purge unload all loaded modulefiles
restore[=coll] restore module list from collection named coll or
default collection if no collection name provided
unload=mod1[&mod2...] remove modulefile(s) mod1, (mod2...)
switch=mod1&mod2 unload modulefile mod1 and load mod2
[load=]mod1[&mod2...] load modulefile(s) mod1, (mod2...)
Multiple MODULE_ACTION arguments can be specified as one argument by
separating them with a colon character (:).
To clearly separate command-line arguments from the module action arguments
a '--' argument can be used. Without this '--' separator, first argument is
considered module action and following arguments are part of command-line.
Examples:
$progpath restore command arg1 arg2
$progpath purge:mod1:mod2 command arg1 arg2
$progpath restore load=mod1&mod2 -- command arg1 arg2"
}
# command help is asked
if [ $# -eq 0 -o "$1" == '-h' -o "$1" == '--help' ]; then
echo_usage
exit 0
fi
# parse arguments
for arg in ${@}; do
# reach separator, everything after is part of cmd
if [ "$arg" == '--' ]; then
kind_of_arg='cmd'
else
if [ "$kind_of_arg" == 'cmd' ]; then
cmdarglist+=("$arg")
else
for subarg in ${arg//:/ }; do
if [ "$kind_of_arg" == 'mod' ]; then
modarglist+=("$(arg_into_modaction ${subarg})")
else
maymodarglist+=("$(arg_into_modaction ${subarg})")
maycmdarglist+=("$subarg")
fi
done
# after first arg, we are not sure
# following args are about module env
if [ "$kind_of_arg" == 'mod' ]; then
kind_of_arg='maymod'
fi
fi
fi
done
# if a cmd separator has been found what we thought
# to be module-related is really module-related
if [ "$kind_of_arg" == 'cmd' ]; then
modarglist+=("${maymodarglist[@]}")
# elsewhere what we thought to be module-related
# is in fact command-line related
else
cmdarglist=("${maycmdarglist[@]}" "${cmdarglist[@]}")
fi
# check module function is defined
if ! typeset -F module >/dev/null; then
echo_error "module command not found..."
fi
for arg in "${modarglist[@]}"; do
module ${arg}
done
# now execute the real command with its interpreter
exec ${cmdarglist[*]}