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[bug#40373] [PATCH] guix: new command "guix run-script"
From: |
Konrad Hinsen |
Subject: |
[bug#40373] [PATCH] guix: new command "guix run-script" |
Date: |
Mon, 04 May 2020 15:54:59 +0200 |
Hi Simon,
>> That's very clever! The weak spot is the P, as script evaluation does
>> not print anything. We could make it print the script's return code ;-)
>
> Hum? The usual REPL neither. :-)
You mean... they have been LYING to us all the time... about the REPL?
> Quoting Wikipedia: "print function takes the result yielded by eval"
> but from my understanding 'eval' does not always yield a "printable"
> result, e.g., "(define foo 42)".
True, not always. But for scripts it's never. We have to find some nice
three-valued logic rhetoric that applies to all situations ;-)
Command line:
- read an expression,
- eval it,
- print the result of the evaluation (if any),
- and finally loop to process the next expression
Scripts:
- read the script file1,
- eval it,
- print the textual output of the script (if any),
- and finally loop if there is more than one script file.
That makes "print" look optional in both cases.
Cheers,
Konrad.
- [bug#40373] [PATCH] guix: new command "guix run-script",
Konrad Hinsen <=