Run bash-builder code directly

Finally, bash-builder scripts can be run directly!

Install 6.1.1 or later to be able to use #!/usr/bin/env bbrun as your executable, and you will be able to run bash-builder scripts directly (assuming you have also installed the library scripts your own script needs)!

Note that to achieve this, bbrun builds your script to a temp space - so using "$0" for identifying where the script was called from no longer works. Instead, you need to use the "$BBRUN_SCRIPT" variable which will point to the location of the original script.

An example use would be:

#!/usr/bin/env bbrun

#%include std/out.sh

main() {
    out:info "You ran '$BBRUN_SCRIPT' (compiled to '$0')"
}

main "$@"

Of course, using syntax-extensions.sh and all libraries are also supported as normal. It's just a shebangable wrapper around bbuild after all...