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41 lines
1.7 KiB
41 lines
1.7 KiB
4 years ago
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# Coq {#sec-language-coq}
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Coq libraries should be installed in `$(out)/lib/coq/${coq.coq-version}/user-contrib/`. Such directories are automatically added to the `$COQPATH` environment variable by the hook defined in the Coq derivation.
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Some extensions (plugins) might require OCaml and sometimes other OCaml packages. The `coq.ocamlPackages` attribute can be used to depend on the same package set Coq was built against.
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Coq libraries may be compatible with some specific versions of Coq only. The `compatibleCoqVersions` attribute is used to precisely select those versions of Coq that are compatible with this derivation.
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Here is a simple package example. It is a pure Coq library, thus it depends on Coq. It builds on the Mathematical Components library, thus it also takes `mathcomp` as `buildInputs`. Its `Makefile` has been generated using `coq_makefile` so we only have to set the `$COQLIB` variable at install time.
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```nix
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{ stdenv, fetchFromGitHub, coq, mathcomp }:
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stdenv.mkDerivation rec {
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name = "coq${coq.coq-version}-multinomials-${version}";
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version = "1.0";
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src = fetchFromGitHub {
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owner = "math-comp";
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repo = "multinomials";
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rev = version;
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sha256 = "1qmbxp1h81cy3imh627pznmng0kvv37k4hrwi2faa101s6bcx55m";
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};
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buildInputs = [ coq ];
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propagatedBuildInputs = [ mathcomp ];
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installFlags = "COQLIB=$(out)/lib/coq/${coq.coq-version}/";
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meta = {
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description = "A Coq/SSReflect Library for Monoidal Rings and Multinomials";
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inherit (src.meta) homepage;
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license = stdenv.lib.licenses.cecill-b;
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inherit (coq.meta) platforms;
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};
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passthru = {
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compatibleCoqVersions = v: builtins.elem v [ "8.5" "8.6" "8.7" ];
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};
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}
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```
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