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#!/bin/bash
#
# multihome 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.
#
# multihome 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 multihome. If not, see <http://www.gnu.org/licenses/>.
# Determine parent shell to know what kind of variable export mode we need later
parent_shell=`ps -ocommand= -p $PPID | awk -F/ '{print $NF}' | awk '{print $1}'| sed 's|-||'`
### MULTI-HOME BEGIN ###
# Define rc file for custom configuration
RC=$HOME/.homerc
# Add default cluster patterns
# Elements are delimited by SPACES
clusters=( )
transfer_env=( .*profile .*login .*cshrc* .bash* )
# Don't edit these
hostname_short=$(hostname -s)
host_suffix=".stsci.edu"
home_remote_path=$HOME
cluster=""
cluster_force=false
if [ -f "$RC" ]; then
source $RC
fi
# Are we on a cluster machine?
if [ ${#clusters[@]} -gt 0 ]; then
for host in "${clusters[@]}"
do
if [[ "$HOSTNAME" == *${host}*${host_suffix} ]]; then
cluster=${host}
break
fi
done
fi
if [ "$cluster_force" != false ]; then
echo "Forcing clustered environment"
cluster="standard"
fi
if [ ! -z "$cluster" ]; then
# Assign directory structure
home_local_path="/home/$USER/home_local/$cluster/$hostname_short"
# If we are already inside, die
if [[ "$PWD" == $home_local_path* ]]; then
exit 2
fi
# If multi-home directory does not exist, create it
if [ ! -d $home_local_path ]; then
mkdir -p $home_local_path
if [ $? -ne 0 ]; then
echo "No write access: $home_local_path, aborting"
home_local_path=/home/$USER
fi
fi
# Generate symlink to original home directory
( cd $home_local_path ;
if [ ! -L HEAD_"$USER" ]; then
ln -sf "$home_remote_path" HEAD_"$USER"
fi )
# Copy baseline enviroment
( cd $home_local_path ;
for file in "${transfer_env[@]}"
do
SRC="$home_remote_path/$file"
DEST="$home_local_path"
if [ "$file" == stsci_multihome ]; then
continue
fi
if [ ! -f "$DEST/$file" ]; then
cp -a $SRC $DEST 2>/dev/null
fi
done )
else
home_local_path=/home/$USER
fi
SHELL_MODE=
SHELL_MODE_DELIMITER=
#Environment switch-over (external eval required)
case "$parent_shell" in
bash|ksh|sh)
SHELL_MODE="export"
SHELL_MODE_DELIMITER="="
;;
tcsh|csh)
SHELL_MODE="setenv"
SHELL_MODE_DELIMITER=" "
;;
*)
;;
esac
if [ -z "$SHELL_MODE" ]; then
echo Unsupported shell: $parent_shell, aborting
exit 1
fi
# Give us a new HOME
echo $SHELL_MODE HOME${SHELL_MODE_DELIMITER}"${home_local_path}"
### MULTI-HOME END ###
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