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pythonPackages.sympy: add antlr4 dep #75549

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@matthuszagh matthuszagh commented Dec 12, 2019

antlr is necessary for sympy to be able to parse latex input (see the bottom of this page).

Motivation for this change
Things done
  • Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
  • Built on platform(s)
    • NixOS
    • macOS
    • other Linux distributions
  • Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
  • Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-review wip"
  • Tested execution of all binary files (usually in ./result/bin/)
  • Determined the impact on package closure size (by running nix path-info -S before and after)
  • Ensured that relevant documentation is up to date
  • Fits
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antlr is necessary for sympy to be able to parse latex input.
@matthuszagh matthuszagh requested review from FRidh and jonringer as code owners Dec 12, 2019
@matthuszagh matthuszagh mentioned this pull request Dec 12, 2019
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@ofborg ofborg bot added the 6.topic: python label Dec 12, 2019
@ofborg ofborg bot requested review from lovek323 and timokau Dec 12, 2019
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@FRidh FRidh commented Dec 12, 2019

Is it a mandatory dependency (that is, it is in install_requires), or an optional dependency?

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@matthuszagh matthuszagh commented Dec 13, 2019

Fair point, only necessary if you need latex parsing (not sure if it's used anywhere else). Shall I change it to an option defaulting to false?

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@matthuszagh matthuszagh commented Dec 14, 2019

Happy to close this if you don't feel it's necessary since it's an optional dependency.

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@jonringer jonringer commented Dec 14, 2019

unfortunately there's a mismatch in abstractions between nix and python packages, in which this scenario doesn't have a great solution.

The most proper course of action would be include the related antlr4 package in the environment in which you need it.

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@matthuszagh matthuszagh commented Dec 14, 2019

Sounds good, thanks for the response @jonringer. Closing this.

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