This crate is structured like:

shell---shell-main (The main binary)
      |
      |-shell-api  (The common api)
      |
      |-scripts    (The scritps directory)

To test this example:

1. Enter shell directory cd shell
2. Compile the workspace cargo b
3. The main crate expects the scripts to be in /tmp/rscript_shell (or the platform equivalent), so we create it mkdir /tmp/rscript_shell and we can just cp the scripts or symlink it ln -s target/debug/eval-script /tmp/rscript_shell ln -s target/debug/random-script /tmp/rscript_shell
4. Now we can run the main binary cargo r --bin shell-main, you can try inputing some random command (ls for example) and hit enter.