In this script, ~ is /root/. How to be in /home/name-of-the-user/?

Question

#!/bin/bash    

#become root
UID=$(id -u)
if [ x$UID != x0 ] 
then
    printf -v cmd_str '%q ' "$0" "$@"
    exec sudo su -c "$cmd_str"
fi


mkdir ~/.D3GO/; 
cp -a `pwd`/viewright_backup/. ~/.D3GO/;

mkdir /opt/D3GO/;
cp `pwd`/D3GO /opt/D3GO/;
cp `pwd`/D3GO.png /opt/D3GO/;
cp `pwd`/D3GO.desktop /usr/share/applications/;
chmod +x /opt/D3GO/D3GO;

As you can see, because this uses ~, and the script is ran as root, it creats the folder.D3GO in the /root/ directory. Is it possible to create it in the home directory. For example, if the script is located in /home/user/Downloads/, it should create the directory in home/user/. If it's located in /home/user2/Downloads/dir/, it should create it in /home/user2/ etc. Is this possible? Thanks!

Maybe something like:

#!/bin/bash    

#remember the username
user = $(whoami);

#become root
UID=$(id -u)
if [ x$UID != x0 ] 
then
    printf -v cmd_str '%q ' "$0" "$@"
    exec sudo su -c "$cmd_str"
fi


mkdir /home/`echo user`/.D3GO/; 
cp -a `pwd`/viewright_backup/. /home/`echo user`/.D3GO/;

Answer 1

You are making this more difficult then it needs to be.

First, there is no reason your script (as posted) needs to run as root.

Second, you are using /opt rather then /usr/local . By default , ubuntu uses /usr/local and /usr/local is on the default path.

And third your are using ambiguous locations such as .. and pwd and ~ . It is best to use the full path and standard locations.

Why not use $HOME ?

[[ -d "$HOME"/.D3GO ]] || mkdir "$HOME"/.D3GO

Most of your other problems are solved with a decent make file or a well packaged .deb . If your script is dependent on things outside the script, files or .png, package it into a .deb or write a make file so that the things you need are installed into standard locations /usr/local or in the system if you wish.

If you are installing something, you would provide an archive and you should write your script relative to the archive you provide.

So your archive might be FOO and inside you would have

FOO/files FOO/img FOO/Your_script

So "Your_Script" can just call "cp ./file/file_to_install /where/to/install"

To be honest, most of your installation ("cp pwd" stuff) is best handled with either

1. Proper packaging into a .deb

2. A make file .

Either of the above have numerous advantages including, but not limited to, ease of installation, ease of removal, and installing files to standard, known locations.