HoTT about platform

[Alizter]

Once I can get the noinit stuff merged into the main branch, we can think about getting rid of the current makefile setup. There are still some decisions about the html docs, dependency graphs etc. that need to be sorted out. That will let us to eventually get rid of the hoq commands.

I should also add that I would like to eventually switch to using dune to build the library.

[Zimmi48]

How stable is HoTT nowadays? It's hard to tell from the version numbering scheme since it just mimics the one of Coq.

Another question is the non-standard hoqtop / hoqc / hoqide commands that it introduces. Isn't it time to get rid of those? Maybe getting in the platform would be a good trigger for doing this.

[spitters]

@Alizter just mentioned that he got HoTT to compile with the stdlib. Together with @ejgallego.
So, this should greatly simplify the inclusion in platform.
This is quite exciting!

[Alizter]

@spitters I got HoTT to compile without the stdlib using the noinit argument.

[palmskog]

@Alizter @spitters when do we get a package in the Coq opam archive for HoTT for 8.12? Is this planned at all?

[k4rtik]

It seems HoTT is already included in the latest platform release #97 and #99 by @MSoegtropIMC, however, it doesn't seem locatable:

$ rlwrap coqtop
Welcome to Coq 8.13.2 (April 2021)

Coq < Require Import HoTT.
Toplevel input, characters 15-19:
> Require Import HoTT.
>                ^^^^
Error: Unable to locate library HoTT. (While searching for a .vos file.)

I can't find binaries like hoqtop or hoqc either. Is all this expected?

[Alizter]

@k4rtik Yes it is expected not to find the hoq scripts. The HoTT library should work with regular coq_makefile, coqide etc. You need to set up your _CoqProject to pass -noinit and -indices-matter to coq however.

As for why you can't locate the library, did you install HoTT using opam?

[k4rtik]

$ coqtop -noinit -indices-matter
Welcome to Coq 8.13.2 (April 2021)

Coq < Require Import HoTT.
Toplevel input, characters 15-19:
> Require Import HoTT.
>                ^^^^
Error: Unable to locate library HoTT. (While searching for a .vos file.)

Coq < ^D
$ opam install coq-hott
[NOTE] Package coq-hott is already installed (current version is 8.13).

I installed the coq platform released 4 days ago. If it helps, I am on macOS.

[Alizter]

Try

From HoTT Require Import HoTT.

[k4rtik]

Got it, that works.

Thanks. Perhaps this issue can now be closed?