#!/bin/bash

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

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

here=$(pwd)

pushd "$DIR" || exit 255
rm -f .root
pwd > .root
popd || exit 255

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 [[ "$dest" == "$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 [[ "$dest" == "$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