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nixpkgs/pkgs/build-support/build-maven.nix
Charles Duffy 8f90b33240
buildMaven: Support metadata-only dependencies
The circumstances which can make this necessary are discussed in NixOS/mvn2nix-maven-plugin#17
2018-11-29 17:29:59 +00:00

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2.5 KiB
Nix

{ stdenv, maven, runCommand, writeText, fetchurl, lib, requireFile }:
/* 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.
*/
infoFile: let
info = lib.importJSON infoFile;
script = writeText "build-maven-repository.sh" ''
${lib.concatStrings (map (dep: let
inherit (dep) sha1 groupId artifactId version metadata repository-id;
versionDir = dep.unresolved-version or version;
authenticated = dep.authenticated or false;
url = dep.url or "";
fetch = if (url != "") then ((if authenticated then requireFile else fetchurl) {
inherit url sha1;
}) else "";
fetchMetadata = (if authenticated then requireFile else fetchurl) {
inherit (metadata) url sha1;
};
in ''
dir=$out/$(echo ${groupId} | sed 's|\.|/|g')/${artifactId}/${versionDir}
mkdir -p $dir
${lib.optionalString (fetch != "") ''
ln -sv ${fetch} $dir/${fetch.name}
''}
${lib.optionalString (dep ? metadata) ''
ln -svf ${fetchMetadata} $dir/maven-metadata-${repository-id}.xml
${lib.optionalString (fetch != "") ''
ln -sv ${fetch} $dir/$(echo ${fetch.name} | sed 's|${version}|${dep.unresolved-version}|')
''}
''}
'') info.dependencies)}
'';
repo = runCommand "maven-repository" {} ''
bash ${script}
'';
settings = writeText "settings.xml" ''
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
http://maven.apache.org/xsd/settings-1.0.0.xsd">
<localRepository>${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
'';
};
}