#!/bin/bash

set -uo pipefail
IFS=$'\n\t'

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

here=$(pwd)

pushd $DIR
rm -f .root
echo "$(pwd)" > .root
popd

ret=0

# If this use of readlink breaks, see
# https://unix.stackexchange.com/questions/47710/find-only-destination-of-symlink
# for discussion of alternatives.

for i in _reformat-common.bash do-reformat.sh would-reformat.sh .root; do
    if [[ -f "$here"/bin/"$i" ]] ; then
        dest=$(readlink bin/$i)
        if [[ x"$dest" == x"$DIR/$i" ]] ; then
            echo $i is in place, good
        else
            echo $i exists but it is not a symlink or does not point to the right place
            echo If it is a symlink, it points to: $dest
            echo "(If it doesn't point anywhere, then it probably is not a symlink)"
            ret=1
        fi
    else
        # it doesn't exist; create it
        echo setting $i up
        mkdir -p $here/bin
        ln -s $DIR/$i $here/bin/$i
    fi
done

if [[ -f $here/.dir-locals.el ]] ; then
    dest=$(readlink .dir-locals.el)
    if [[ x"$dest" == x"$DIR/_dir-locals.el" ]] ; then
        echo .dir-locals.el is in place, good
    else
        echo .dir-locals.el exists but it is not a symlink or does not point to
        echo the right place
        echo
        echo It is possible that you are using .dir-locals.el for other purposes,
        echo in which case this is not really an error.
        ret=1
    fi
else
    echo setting .dir-locals.el up
    ln -s $DIR/_dir-locals.el $here/.dir-locals.el
fi

exit $ret