forked from mirrors/nixpkgs
102 lines
3.5 KiB
XML
102 lines
3.5 KiB
XML
<section xmlns="http://docbook.org/ns/docbook"
|
|
xmlns:xlink="http://www.w3.org/1999/xlink"
|
|
xml:id="sec-language-ocaml">
|
|
<title>OCaml</title>
|
|
|
|
<para>
|
|
OCaml libraries should be installed in
|
|
<literal>$(out)/lib/ocaml/${ocaml.version}/site-lib/</literal>. Such
|
|
directories are automatically added to the <literal>$OCAMLPATH</literal>
|
|
environment variable when building another package that depends on them
|
|
or when opening a <literal>nix-shell</literal>.
|
|
</para>
|
|
|
|
<para>
|
|
Given that most of the OCaml ecosystem is now built with dune,
|
|
nixpkgs includes a convenience build support function called
|
|
<literal>buildDunePackage</literal> that will build an OCaml package
|
|
using dune, OCaml and findlib and any additional dependencies provided
|
|
as <literal>buildInputs</literal> or <literal>propagatedBuildInputs</literal>.
|
|
</para>
|
|
|
|
<para>
|
|
Here is a simple package example. It defines an (optional) attribute
|
|
<literal>minimumOCamlVersion</literal> that will be used to throw a
|
|
descriptive evaluation error if building with an older OCaml is attempted.
|
|
It uses the <literal>fetchFromGitHub</literal> fetcher to get its source.
|
|
It sets the <literal>doCheck</literal> (optional) attribute to
|
|
<literal>true</literal> which means that tests will be run with
|
|
<literal>dune runtest -p angstrom</literal> after the build
|
|
(<literal>dune build -p angstrom</literal>) is complete.
|
|
It uses <literal>alcotest</literal> as a build input (because it is needed
|
|
to run the tests) and <literal>bigstringaf</literal> and
|
|
<literal>result</literal> as propagated build inputs (thus they will also
|
|
be available to libraries depending on this library).
|
|
The library will be installed using the <literal>angstrom.install</literal>
|
|
file that dune generates.
|
|
</para>
|
|
|
|
<programlisting>
|
|
{ stdenv, fetchFromGitHub, buildDunePackage, alcotest, result, bigstringaf }:
|
|
|
|
buildDunePackage rec {
|
|
pname = "angstrom";
|
|
version = "0.10.0";
|
|
|
|
minimumOCamlVersion = "4.03";
|
|
|
|
src = fetchFromGitHub {
|
|
owner = "inhabitedtype";
|
|
repo = pname;
|
|
rev = version;
|
|
sha256 = "0lh6024yf9ds0nh9i93r9m6p5psi8nvrqxl5x7jwl13zb0r9xfpw";
|
|
};
|
|
|
|
buildInputs = [ alcotest ];
|
|
propagatedBuildInputs = [ bigstringaf result ];
|
|
doCheck = true;
|
|
|
|
meta = {
|
|
homepage = https://github.com/inhabitedtype/angstrom;
|
|
description = "OCaml parser combinators built for speed and memory efficiency";
|
|
license = stdenv.lib.licenses.bsd3;
|
|
maintainers = with stdenv.lib.maintainers; [ sternenseemann ];
|
|
};
|
|
}
|
|
</programlisting>
|
|
|
|
<para>
|
|
Here is a second example, this time using a source archive generated with
|
|
<literal>dune-release</literal>. The <literal>unpackCmd</literal>
|
|
redefinition is necessary to be able to unpack the kind of tarball that
|
|
<literal>dune-release</literal> generates. This library does not depend
|
|
on any other OCaml library and no tests are run after building it.
|
|
</para>
|
|
|
|
<programlisting>
|
|
{ stdenv, fetchurl, buildDunePackage }:
|
|
|
|
buildDunePackage rec {
|
|
pname = "wtf8";
|
|
version = "1.0.1";
|
|
|
|
minimumOCamlVersion = "4.01";
|
|
|
|
src = fetchurl {
|
|
url = "https://github.com/flowtype/ocaml-${pname}/releases/download/v${version}/${pname}-${version}.tbz";
|
|
sha256 = "1msg3vycd3k8qqj61sc23qks541cxpb97vrnrvrhjnqxsqnh6ygq";
|
|
};
|
|
|
|
unpackCmd = "tar xjf $src";
|
|
|
|
meta = with stdenv.lib; {
|
|
homepage = https://github.com/flowtype/ocaml-wtf8;
|
|
description = "WTF-8 is a superset of UTF-8 that allows unpaired surrogates.";
|
|
license = licenses.mit;
|
|
maintainers = [ maintainers.eqyiel ];
|
|
};
|
|
}
|
|
</programlisting>
|
|
|
|
</section>
|