run meld in docker

meld

#!/bin/bash

#sudo apt-get install realpath  # may already be installed

PATH1=$(realpath $1)
PATH2=$(realpath $2)

[ -d $PATH1 ] || PATH1=$(dirname $PATH1) 
[ -d $PATH2 ] || PATH2=$(dirname $PATH2) 

echo $PATH1
echo $PATH2

XAUTH=/tmp/.docker.xauth

echo "Preparing Xauthority data..."
xauth_list=$(xauth nlist :0 | tail -n 1 | sed -e 's/^..../ffff/')
if [ ! -f $XAUTH ]; then
    if [ ! -z "$xauth_list" ]; then
        echo $xauth_list | xauth -f $XAUTH nmerge -
    else
        touch $XAUTH
    fi
    chmod a+r $XAUTH
fi

docker run \
-w $PWD \
--env="DISPLAY=$DISPLAY" \
    --env="QT_X11_NO_MITSHM=1" \
    --volume="/tmp/.X11-unix:/tmp/.X11-unix:rw" \
    --env="XAUTHORITY=$XAUTH" \
--volume="$XAUTH:$XAUTH" \
-v $PATH1:$PATH1 -v $PATH2:$PATH2 \
guywithnose/meld meld $1 $2

Requires docker.

Copy to /usr/bin/

Example: meld file1 file2