[Agda] Installing Idris without breaking Agda

[Dave Martin]

...Update!

The install is FINALLY complete after all these hours! I got the following error messages:

Installed idris-1.3.1
cabal: Error: some packages failed to install:
Agda-2.5.3 failed during the configure step. The exception was:
ExitFailure 1

...That is indeed the version of Agda I'd had; but I've tried opening and loading an .agda file into Emacs and so far (haven't tried other commands yet) all seems well. Also called up the Idris REPL and everything seems in order there too.

Is everything indeed fine? Why the error messages? What has happened exactly?

...A huge list of apparently success indicating messages...but then a couple of (apparent) error messages towards the end:

Configuring Agda-2.5.3...
Failed to install Agda-2.5.3

[...]

Configuring Agda-2.5.3...
setup: The program 'alex' version >=3.1.0 && <3.2.0 || >=3.2.1 is required but
it could not be found.
cabal: Leaving directory '/tmp/cabal-tmp-14275/Agda-2.5.3'

[...]

Building idris-1.3.1...

...where it has been stuck for probably half an hour now. Did the fact that I still had Agda open during this process have something to do with it? It hadn't been obvious to me that I should close it; I just thought the "Agda" in the command you sent me was a flag to avoid Agda or something, not a reinstallation as I now think it may have been. What should I do now? I'm starting to think that this is not normal! Idris shouldn't take this long to install!


> Sent: Sunday, October 28, 2018 at 7:52 PM
> From: "Tom Murphy" <amindfv at gmail.com>
> To: "Dave Martin" <dave.martin at mail.com>
> Cc: agda at lists.chalmers.se
> Subject: Re: [Agda] Installing Idris without breaking Agda
>
> What's the result of
> 
>     cabal install idris Agda uri-encode
> 
> ?
> 
> Tom
> 
> On 10/28/18, Dave Martin <dave.martin at mail.com> wrote:
> > I hope this isn't too off topic, but understand that I'm almost completely
> > "computer illiterate" and I don't know of any better place to ask it!
> >
> > I some time ago installed (Linux Mint 19) Emacs and Agda; they apparently
> > work perfectly. But now I want to install Idris as well. I followed the
> > official instructions (
> > http://docs.idris-lang.org/en/latest/tutorial/starting.html ). I first
> > installed cabal, then did cabal update, both with no messages; then I
> > finally tried cabal install idris. Whereupon I get this message:
> >
> > cabal: The following packages are likely to be broken by the reinstalls:
> > uri-encode-1.5.0.5
> > Agda-2.5.3
> > Use --force-reinstalls if you want to install anyway.
> >
> > Ah, what is going on here? I don't want to break Agda! (Taking the website's
> > suggestion of adding to my PATH didn't help.) How do I handle this puzzle?
> >
> > Also: Once I succeed, will I be able to use Idris in Emacs like I can Agda?
> > I have used Atom and I find it unpleasant and confusing.
> >
> > Any help anyone can provide would be appreciated; again, I was sure this
> > small community is as likely as any out there to be familiar with what it
> > takes.
> > _______________________________________________
> > Agda mailing list
> > Agda at lists.chalmers.se
> > https://lists.chalmers.se/mailman/listinfo/agda
> >
>