core/pkgs/build-support/build-maven.nix

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2024-05-02 00:46:19 +00:00
{ stdenv, maven, runCommand, writeText, fetchurl, lib, requireFile, linkFarm }:
# Takes an info file generated by mvn2nix
# (https://github.com/NixOS/mvn2nix-maven-plugin) and builds the maven
# project with it.
#
# repo: A local maven repository with the project's dependencies.
#
# settings: A settings.xml to pass to maven to use the repo.
#
# build: A simple build derivation that uses mvn compile and package to build
# the project.
#
# @example
# project = pkgs.buildMaven ./project-info.json
infoFile:
let
info = lib.importJSON infoFile;
dependencies = lib.flatten (map (dep:
let
inherit (dep) sha1 groupId artifactId version metadata repository-id;
versionDir = dep.unresolved-version or version;
authenticated = dep.authenticated or false;
url = dep.url or "";
fetch = if (url != "") then
((if authenticated then requireFile else fetchurl) {
inherit url sha1;
})
else
"";
fetchMetadata = (if authenticated then requireFile else fetchurl) {
inherit (metadata) url sha1;
};
layout = "${
builtins.replaceStrings [ "." ] [ "/" ] groupId
}/${artifactId}/${versionDir}";
in lib.optional (url != "") {
layout = "${layout}/${fetch.name}";
drv = fetch;
} ++ lib.optionals (dep ? metadata) ([{
layout = "${layout}/maven-metadata-${repository-id}.xml";
drv = fetchMetadata;
}] ++ lib.optional (fetch != "") {
layout = "${layout}/${
builtins.replaceStrings [ version ] [ dep.unresolved-version ]
fetch.name
}";
drv = fetch;
})) info.dependencies);
repo = linkFarm "maven-repository" (lib.forEach dependencies (dependency: {
name = dependency.layout;
path = dependency.drv;
}));
settings = writeText "settings.xml" ''
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
http://maven.apache.org/xsd/settings-1.0.0.xsd">
<localRepository>${repo}</localRepository>
</settings>
'';
src = dirOf infoFile;
in {
inherit repo settings info;
build = stdenv.mkDerivation {
name = "${info.project.artifactId}-${info.project.version}.jar";
src = builtins.filterSource (path: type:
(toString path) != (toString (src + "/target")) && (toString path)
!= (toString (src + "/.git"))) src;
buildInputs = [ maven ];
buildPhase = "mvn --offline --settings ${settings} compile";
installPhase = ''
mvn --offline --settings ${settings} package
mv target/*.jar $out
'';
};
}