bug#23118: Duplicate entries in various environment variables

[Maxim Cournoyer]

Hi,

[...]

> More generally, this can become an issue when environment variables
> reach a certain size (and has led to bug reports in Guix before, which
> have since been fixed).  POSIX mandates a syntax, that would allow
> removing already present components first (see [1]), but I can hardly
> imagine what monstrosities we would need to cook up to do this
> reliably.  Not to mention, that some otherwise POSIX-compliant shells
> might not implement that syntax (correctly).

Why are we talking about POSIX here?  Our wrap-program procedure makes
use of Bash; we could make use of its features to filter duplicates,
right?  Unless I'm missing something.

-- 
Thanks,
Maxim