rysh-script

Overview ¶

Command rysh-script is a shebang shim: it runs `rysh script` with whatever arguments it was given.

It exists for one reason. The natural shebang for a .rysh file is

#!/usr/bin/env -S rysh script

but `env -S` needs coreutils >= 8.30 (2018). A kernel hands a shebang line to the interpreter as at most ONE argument, so without -S the "script" word would arrive glued to the path and nothing would run. Shipping a binary whose name IS the interpreter sidesteps the whole problem:

#!/usr/bin/env rysh-script

which works everywhere, including the BSDs and older distributions.

It deliberately does no work of its own — it finds the rysh binary and execs it — so there is no second implementation of the language to drift.