#!/bin/bash
#
#  Installation script for GitHub gist 188e1731135874d7d69a2f1b9711f9a8
#  (screenrc with a decent-looking caption / hardstatus line, including LSF
#  job status)
#

# trace all operations so user can see what's happening
set -x

GIST='https://gist.github.com/ernstki/188e1731135874d7d69a2f1b9711f9a8'
GISTRAW="$GIST/raw"
SCREENRC='screenrc-with-lsf-support'
SCRIPT='zz_bjob_status.sh'

# create ~/bin and add it to user's PATH environment variable
test -d ~/bin || mkdir ~/bin
grep -q "$HOME/bin" <<<"$PATH" || \
    echo -e "\n# add ~/bin to PATH\nexport PATH=\"\$PATH:\$HOME/bin\"" >> ~/.bashrc

# make a backup of an existing ~/.screenrc (could be file or symlink)
test -r ~/.screenrc && \mv ~/.screenrc ~/.screenrc.bak-$(date +%Y%m%d)

# fetch the helper script, then the .screenrc
GETTER='curl -sLOJ'
which curl &>/dev/null || GETTER='wget'

( cd ~/bin; $GETTER $GISTRAW/$SCRIPT; \mv $SCRIPT ${SCRIPT/zz_/} )
SCRIPT=${SCRIPT/zz_/}
chmod a+x ~/bin/$SCRIPT
  
( cd; $GETTER $GISTRAW/$SCREENRC; \mv $SCREENRC .screenrc )

# stop tracing
set +x

if test -x ~/bin/$SCRIPT -a -f ~/.screenrc; then
    source ~/.bashrc
    unset GIST GISTRAW SCREENRC SCRIPT
    echo -e "\nOK! Restart 'screen' (if necessary) for changes to take effect."
else
    echo -e "\nOh noes. Something went wrong with the installation." >&2
fi

# end