nixpkgs/pkgs/development/ocaml-modules/cmdliner/default.nix

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{ stdenv, fetchurl, ocaml, findlib, ocamlbuild, topkg, result }:
let
pname = "cmdliner";
in
assert stdenv.lib.versionAtLeast ocaml.version "4.01.0";
let param =
if stdenv.lib.versionAtLeast ocaml.version "4.03" then {
version = "1.0.4";
sha256 = "1h04q0zkasd0mw64ggh4y58lgzkhg6yhzy60lab8k8zq9ba96ajw";
} else {
version = "1.0.2";
sha256 = "18jqphjiifljlh9jg8zpl6310p3iwyaqphdkmf89acyaix0s4kj1";
}
; in
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stdenv.mkDerivation rec {
name = "ocaml${ocaml.version}-${pname}-${version}";
inherit (param) version;
src = fetchurl {
url = "https://erratique.ch/software/${pname}/releases/${pname}-${version}.tbz";
inherit (param) sha256;
};
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nativeBuildInputs = [ ocamlbuild topkg ];
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buildInputs = [ ocaml findlib ];
propagatedBuildInputs = [ result ];
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inherit (topkg) buildPhase installPhase;
meta = with stdenv.lib; {
homepage = https://erratique.ch/software/cmdliner;
description = "An OCaml module for the declarative definition of command line interfaces";
license = licenses.bsd3;
platforms = ocaml.meta.platforms or [];
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maintainers = [ maintainers.vbgl ];
};
}