`--eval-file` requires `=`, impossible to provide from `#!`

[egasimus]

Version: Deno 2.5.3
CC: @najumancheril, @bartlomieju, @dsherret
Related: #23071

Hi folks. I'm trying to run a REPL from a script with least steps and moving parts. The distinction made in #23071 (to only get the exports) is not decisive to my use case, so --eval-file is fine too. However, the --eval-file flag as merged in #14247 doesn't seem to work in hashbang context:

#!/usr/bin/env -S deno repl --allow-read --eval-file
console.log('hello from data.ts')

error: equal sign is needed when assigning values to '--eval-file=<eval-file>...'

Were it not for the equal sign requirement, this would parse as deno repl --allow-read --eval-file data.ts and drop me right where I need to be. The equal sign is explained to be needed for passing multiple values (--eval-file=1.ts,2.ts).

Do you guys see a way to make this work with multiple flag instances (--eval-file 1.ts --eval-file 2.ts), making the equal sign optional, without breaking backwards compatibility?

[najumancheril]

I'm a bit unsure what workflow you're trying to create. Here is my attempt to replicate what you are doing. Here is my data.ts:

console.log("hello from data.ts")

Here is my shell script (test.sh):

#!/usr/bin/env -S deno repl --allow-read --eval-file=data.ts

When I run this script, I see this error message:

$ ./test.sh
error: unexpected argument './test.sh' found

Usage: deno repl [OPTIONS] [-- [ARGS]...]

This is happening because ./test.sh is being passed as a command-line argument to deno. I can stop deno from trying to process this argument by adding -- to the end of my script contents. Here is my modified test.sh:

#!/usr/bin/env -S deno repl --allow-read --eval-file=data.ts --

I now see the following:

$ ./test.sh
hello from data.ts
Deno 2.5.0
exit using ctrl+d, ctrl+c, or close()
>

Does this address your concern?