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# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
DESCRIPTION="Manage MPI classes"
MAINTAINER="jsbronder@gentoo.org"
SVN_DATE='$Date: $'
VERSION="0.0.2"
inherit path-manipulation config
# The basic idea is we want to allow every use to select their own mpi
# implementation they want, and a ${HOME}/.env.d/mpi file is created for them.
# A user then is -required- to source the env file. This sets PATH, MANPATH,
# and LD_LIBRARY_PATH. I'm sure I'm forgetting something here.
# Calling unset only wipes out the env file, replacing it with what we
# previously added stripped out.
# If you can think of a better way to do this, while still allowing user's
# freedom, please let me know.
# List the valid mpi classes currently installed.
find_classes() {
local classes
for f in ${ROOT}/etc/env.d/mpi/*; do
[[ -f ${f} ]] || continue
f=$(basename ${f})
[[ "${f#mpi-}" == "${f}" ]] && continue
classes=(${classes[@]} ${f})
done
echo ${classes[@]}
}
# User's current environment has the class configured in it.
is_in_use() { [ "${ESELECT_MPI_IMP}" == "${1}" ]; }
# User's env file is ready for sourcing for this class
is_enabled() {
[ "$(var_from_user_envd ESELECT_MPI_IMP)" == "${1}" ]
}
var_from_user_envd(){
[ ! -f ${user_ev_sh} ] && return 0
echo "$(source ${user_ev_sh}; echo ${!1})"
}
# Is this a valid class?
is_class() {
local classes=$(find_classes)
for i in ${classes[@]}; do
[[ "${i}" == "${1}" ]] && return 0
done
return 1
}
init() {
local d
[[ ${UID} -eq 0 ]] && HOME="${ROOT}/root"
d="$(canonicalise "${ROOT}/${HOME}")"
d="${d}/.env.d/"
user_ev_sh="${d}mpi.sh";
user_ev_csh="${d}mpi.csh";
if [[ ! -d "${d}" ]]; then
mkdir "${d}" || die -q "Failed to create ${d}."
elif [[ ! -w "${d}" ]]; then
die -q "You do not have permission to mkdir ${d}."
fi
[[ -f "${user_ev_sh}" && ! -w "${user_ev_sh}" \
&& -f "${user_ev_csh}" && ! -w "${user_ev_csh}" ]] \
&& die -q "You do not have permission to write to ${user_ev_sh} or ${user_ev_csh}."
}
global_env() {
local d=$(canonicalise "${ROOT}/etc/env.d/mpi/${1}")
[ -z "${d}" ] && die "Cannot find global env file for ${1}"
ev=${d}
}
### list action ###
describe_list() { echo "List available classs"; }
describe_list_parameters() { echo "[-p]"; }
do_list() {
classes=( $(find_classes) )
init
if [[ ${@} == *-p* ]]; then
echo "${classes[@]}"
else
write_list_start "Available MPI classs:"
if [[ -n "${classes[@]}" ]]; then
for (( i=0; i<${#classes[@]}; i++ )); do
if is_in_use ${classes[$i]} && is_enabled ${classes[$i]}; then
write_kv_list_entry "${classes[$i]}" "Enabled, In Use"
elif is_in_use ${classes[$i]}; then
write_kv_list_entry "${classes[$i]}" "In Use"
elif is_enabled ${classes[$i]}; then
write_kv_list_entry "${classes[$i]}" "Enabled"
else
write_kv_list_entry "${classes[$i]}" "--"
fi
done
else
write_kv_list_entry "(none found)" ""
fi
fi
return 0
}
### set action ###
describe_set() {
echo "Select a MPI class."
}
describe_set_parameters() {
echo "<target>"
}
do_set() {
local binpath lld manpath current_imp
init
current_imp="$(var_from_user_envd ESELECT_MPI_IMP)"
global_env ${1}
[[ -z ${1} ]] && die -q "You didnt specifiy any class for use."
[[ ${#@} -ne 1 ]] && die -q "You may only select exactly one class."
! is_class ${1} && die -q "${1} is not an class."
if is_enabled ${1}; then
echo "${1} implemention is currently in use. This is a no-op."
return
elif [ -n "${current_imp}" ]; then
echo "Cannot select ${1} when ${current_imp} is in use."
return 1
fi
binpath="$(load_config ${ev} PATH)"
lld="$(load_config ${ev} LD_LIBRARY_PATH)"
manpath="$(load_config ${ev} MANPATH)"
cat <<-EOF >${user_ev_sh}
bpl=\`expr "\${PATH}" : ".*${binpath}:"\`
mpl=\`expr "\${MANPATH}" : ".*${manpath}:"\`
llpl=\`expr "\${LD_LIBRARY_PATH}" : ".*${lld}:"\`
if [ \${bpl} -eq 0 ]; then
export PATH="${binpath}:\${PATH}"
fi
if [ \${mpl} -eq 0 ]; then
export MANPATH="${manpath}:\${MANPATH}"
fi
if [ \${llpl} -eq 0 ]; then
export LD_LIBRARY_PATH="${lld}:\${LD_LIBRARY_PATH}"
fi
export ESELECT_MPI_IMP="${1}"
EOF
cat <<-EOF >${user_ev_csh}
set bpl=\`expr "\${PATH}" : ".*${binpath}:"\`
set mpl=\`expr "\${MANPATH}" : ".*${manpath}:"\`
set llpl=\`expr "\${LD_LIBRARY_PATH}" : ".*${lld}:"\`
if ( \$bpl == 0 ) \
setenv PATH "${binpath}:\${PATH}"
if ( \$mpl == 0 ) \
setenv MANPATH "${manpath}:\${MANPATH}"
if ( \$llpl == 0 ) \
setenv LD_LIBRARY_PATH "${lld}:\${LD_LIBRARY_PATH}"
setenv ESELECT_MPI_IMP "${1}"
EOF
echo "Remember to source /etc/profile or /etc/csh.login"
}
### unset action ###
describe_unset() {
echo "Restore MPI-less environment."
}
do_unset() {
local lld current_imp
init
current_imp="$(var_from_user_envd ESELECT_MPI_IMP)"
if [ -z "${current_imp}" ]; then
echo "No implemention currently in use. This is a no-op."
return
fi
global_env "${ESELECT_MPI_IMP}"
lld="$(load_config ${ev} LD_LIBRARY_PATH)"
# PATH and MANPATH are reset in /etc/profile.
cat <<-EOF > ${user_ev_sh}
unset ESELECT_MPI_IMP
l=\`expr "\${LD_LIBRARY_PATH}:" : ".*${lld}:"\`
l=\$(( \${l} + 1 ))
if [ \${l} -gt 1 ]; then
export LD_LIBRARY_PATH="\`expr substr \${LD_LIBRARY_PATH} \${l} 1024\`"
fi
EOF
cat <<-EOF > ${user_ev_csh}
unsetenv ESELECT_MPI_IMP
set l=\`expr "\${LD_LIBRARY_PATH}:" : ".*${lld}:"\`
@ l = ( \${l} + 1 )
if ( \${l} > 1 ) \
setenv LD_LIBRARY_PATH "\`expr substr \${LD_LIBRARY_PATH} \${l} 1024\`"
EOF
echo "Remember to source /etc/profile or /etc/csh.login"
}
### add action (from skel pretty much)
describe_add() {
echo "Add a new mpi class"
}
describe_add_parameters() {
echo "<file>"
}
do_add() {
local class
[[ ${#@} -ne 1 ]] \
&& die -q "Bad arguments, use: mpi add /some/full/path/<class>.eselect"
# If $D is set, we're adding from portage so we want to respect sandbox.
# Otherwise, respect the ROOT variable.
local PREFIX=${D:-${ROOT}/}
# Create directory if necessary
if [[ ! -e ${PREFIX}/etc/env.d/mpi/ ]]; then
mkdir -p ${PREFIX}/etc/env.d/mpi/
else
if [[ ! -d ${PREFIX}/etc/env.d/mpi/ ]]; then
die -q "${PREFIX}/etc/env.d/mpi/ exists but isn't a directory!"
fi
fi
class=$(basename ${1}); class=${class%.eselect}
if ! cp ${1} ${PREFIX}/etc/env.d/mpi/${class}; then
die -q "Installing ${1} as ${PREFIX}/etc/env.d/mpi/${class} failed!"
fi
}
### printvar action ###
describe_printvar() { echo "Print variables stored in global env.d file."; }
describe_printvar_parameters() { echo "<class> <variable>"; }
do_printvar() {
if [[ ${#@} -ne 2 ]] \
|| ! is_class ${1}; then
die -q "Specify exactly 1 class and 1 variable."
fi
global_env ${1}
echo "$(load_config ${ev} ${2})"
}
# vim: ft=eselect:noet
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