nixpkgs/pkgs/development/tools/ocaml/merlin/default.nix

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{ stdenv, fetchzip, ocaml, findlib, yojson
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, withEmacsMode ? false, emacs }:
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assert stdenv.lib.versionAtLeast ocaml.version "4.02";
let
version = "3.1.0";
in
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stdenv.mkDerivation {
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name = "merlin-${version}";
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src = fetchzip {
url = "https://github.com/ocaml/merlin/archive/v${version}.tar.gz";
sha256 = "1vf0c2mmflp94r8hshb44lsvnfdy03ld6mld2n79cdxr3zl24ci2";
};
buildInputs = [ ocaml findlib yojson ]
++ stdenv.lib.optional withEmacsMode emacs;
preConfigure = "mkdir -p $out/bin";
prefixKey = "--prefix ";
configureFlags = stdenv.lib.optional withEmacsMode "--enable-compiled-emacs-mode";
meta = with stdenv.lib; {
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description = "An editor-independent tool to ease the development of programs in OCaml";
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homepage = "https://github.com/ocaml/merlin";
license = licenses.mit;
maintainers = [ maintainers.vbgl ];
};
}