Your "driver" (wrapper, really) script

wrapper script for mysqldump

a shell wrapper for ffmpeg

This buildpack installs shims that always add --headless, --disable-gpu, --no-sandbox, and --remote-debugging-port=9222 to any google-chrome command as you'll have trouble running Chrome on a Heroku dyno otherwise.

Shims are just tiny wrappers created by asdf that just forward execution to the real versioned executables installed by asdf. This way, asdf has a single shims directory added to your PATH and has no need of mangling the PATH for every installed version.

I think it's very confusing to overload common executables, such as yarn, in the /bin directory as I often put that bin directory first in my path. Thus, I'd unexpectedly get the bin/yarn rather than my system yarn, which I manage with yvm.

empty is an utility that provides an interface to execute and/or interact with processes under pseudo-terminal sessions (PTYs). This tool is definitely useful in programming of shell scripts designed to communicate with interactive programs like telnet, ssh, ftp, etc.

it propagates (Option -p) the returnlevel ($?) so you may use it for your purpose.

Write a wrapper script that sets the LD_LIBRARY_PATH environment variable.

Through a process called rehashing, rbenv maintains shims

Shims are lightweight executables that simply pass your command along to rbenv.