chore: add config.nims with nim defaults & chore tasks

[ZoomRmc]

This PR adds a config.nims that provides:

• A few compiler defaults (some of them based on PR chore: add nim_test.yml #20) .
• A Nim task test to run all the units in the repo as executables, with an assumption it runs tests. Task runs with nim test.
  This task is a proposed replacement for the shell scripts from PR chore: add nim_test.yml #20.
  Main benefits over Bash: cross-platform, no additional dependencies.
• A Nim task prettyfy ro run nimpretty on all *.nim files in the repository. Task runs with nim prettyfy
  This task is a proposed replacement for the shell script from PR chore: add check_code_format workflow #19.

List of compiler defaults:

--gc:arc
--checks:on
--assertions:on
--spellSuggest
--styleCheck:error

[dlesnoff]

Apart from being cross-platform, I prefer Nimscript configuration file that does not need additional dependency like Nimble or Atlas.

[dlesnoff]

I think that this is fine, but I wonder how I will merge it with Github actions from previous PRs. I need to ponder about it a bit.

[ZoomRmc]

I think that this is fine, but I wonder how I will merge it with Github actions from previous PRs. I need to ponder about it a bit.

Two ways:

1. Merge as is, fix jobs and remove .sh files in another PR.
2. Wait for/propose changes to chore: add check_code_format workflow #19, chore: add nim_test.yml #20.

[vil02]

@ZoomRmc The benefits are clear - I fully support your idea.

Regarding nim prettyfy - it does not reformat the files at my end.

[ZoomRmc]

@ZoomRmc The benefits are clear - I fully support your idea.

Thanks.

Regarding nim prettyfy - it does not reformat the files at my end.

Works on my end. It's rather silent, though. Did you reset your working tree to main? It should make the changes in the dynamic_programming dir.

[vil02]

Regarding nim prettyfy - it does not reformat the files at my end.

Works on my end. It's rather silent, though. Did you reset your working tree to main? It should make the changes in the dynamic_programming dir.

I have introduced some incorrect formatting and it was not fixed. I have nimpretty 0.2 and Nim Compiler Version 1.6.12 [Linux: amd64].

[ZoomRmc]

I have introduced some incorrect formatting and it was not fixed. I have nimpretty 0.2 and Nim Compiler Version 1.6.12 [Linux: amd64].

Well did the nimpretty run or not with nim prettyfy? This task does little besides that. Nimpretty is not super-reliable and definitely needs a bit more love.

[dlesnoff]

It worked well on my end

[vil02]

I have introduced some incorrect formatting and it was not fixed. I have nimpretty 0.2 and Nim Compiler Version 1.6.12 [Linux: amd64].

Well did the nimpretty run or not with nim prettyfy? This task does little besides that. Nimpretty is not super-reliable and definitely needs a bit more love.

Now I could check it again: it turned out that introducing some big number of empty lines is not considered as incorrect format - sorry for the confusion, it works well.

[vil02]

@ZoomRmc I am having another issue. When running the command nim test, I get the error (both locally and here):
/home/runner/.choosenim/toolchains/nim-1.6.12/lib/pure/parseutils.nim(426, 21) Error: system module needs: nimDestroyAndDispose

Same happens for nim prettyfy.

When I do not use --gc: arc, everything works well.

[ZoomRmc]

@vil02 good catch, thanks.

That's a compiler error, it's fixed on devel (not yet sure at which point though). For mitigation we can move the gc switch from config.nims to nim.cfg.

[vil02]

@ZoomRmc Thanks, cf. 9c9c383 in #20.