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#! /bin/sh
# $Id$
# Copyright 2008 Siep Kroonenberg.
# You may freely use, modify and/or distribute this file.
if test "x$1" = x--help; then
cat <<END_USAGE
Usage: tl-portable
Start a new subshell with the environment set so TeX Live
can be run with minimal impact on the host, that is,
run more or less directly from DVD or USB.
For more, see the "Maximally portable" section in the TeX Live
documentation (http://tug.org/texlive).
END_USAGE
exit 0
fi
#calculate TeX Live root
#it appears that dirname isn't always available
TEXDIR0=$0
TEXDIR=${TEXDIR0%/*}
if test "$TEXDIR" = "$TEXDIR0"; then
TEXDIR="."
fi
unset TEXDIR0
dirsave=`pwd`
cd $TEXDIR
TEXDIR=`pwd`
cd $dirsave
# Test whether the TeX Live directory is writable. We need an actual
# write test, because network drives aren't always identified
# correctly. We accept negatives at face value.
if test -w $TEXDIR; then
# make sure $TEXDIR is really writable
testfile=1
while test -e $TEXDIR/$testfile
do testfile=`expr $testfile + 1`
done
echo Testing whether $TEXDIR is writable...
touch $TEXDIR/$testfile 2>/dev/null
if test -e $TEXDIR/$testfile; then
rm $TEXDIR/$testfile
echo $TEXDIR is writable.
TEXDIRW=$TEXDIR
else
echo $TEXDIR is not writable.
TEXDIRW=$HOME/.tlportable2010
fi
else
TEXDIRW=$HOME/.tlportable2010
fi
echo Using $TEXDIRW for generated files.
platform=`$TEXDIR/install-tl --print-arch`
if test "$platform" = ""; then
echo 'Platform unsupported'
exit 1
elif test ! -d $TEXDIR/bin/$platform; then
echo 'Platform unsupported'
exit 1
fi
if test "$TEXDIR" = "$TEXDIRW"; then
TEXMFCNF=$TEXDIRW
else
TEXMFCNF=$TEXDIRW/texmf-var/web2c
export TEXMFCNF
fi
if test ! -r $TEXMFCNF/texmf.cnf; then
TEXLIVE_INSTALL_PREFIX=$TEXDIRW
export TEXLIVE_INSTALL_PREFIX
if $TEXDIR/install-tl --portable --from_dvd --profile /dev/null; then :; else
echo "$0: Initialization of TeX Live for portable use failed!" >&2
exit 1
fi
unset TEXLIVE_INSTALL_PREFIX
fi
# Try to block initialization scripts.
# Set custom prompt for secondary shell, but
# I know of no good way to do this for the C shell.
ENV=/dev/null
export ENV
PATH=$TEXDIR/bin/$platform:$PATH
export PATH
if test "$SHELL" = /bin/bash; then
PS1='TL \w\$ '
export PS1
exec $SHELL --norc -i
elif test "$SHELL" = /bin/zsh; then
PS1='TL %d%% '
export PS1
exec $SHELL -f -i
elif test "$SHELL" = /bin/csh; then
exec $SHELL -f -i
elif test "$SHELL" = /bin/tcsh; then
exec $SHELL -f -i
else
PS1='TL $PWD\$ '
export PS1
exec $SHELL -f -i
fi
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