nixpkgs/pkgs/build-support/fetchmavenartifact/default.nix

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# Adaptation of the MIT-licensed work on `sbt2nix` done by Charles O'Farrell
{ fetchurl, stdenv }:
let
defaultRepos = [
"https://repo1.maven.org/maven2"
"https://oss.sonatype.org/content/repositories/releases"
"https://oss.sonatype.org/content/repositories/public"
"https://repo.typesafe.com/typesafe/releases"
];
in
args@
{ # Example: "org.apache.httpcomponents"
groupId
, # Example: "httpclient"
artifactId
, # Example: "4.3.6"
version
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, # Example: "jdk11"
classifier ? null
, # List of maven repositories from where to fetch the artifact.
# Example: [ http://oss.sonatype.org/content/repositories/public ].
repos ? defaultRepos
# The `url` and `urls` parameters, if specified should point to the JAR
# file and will take precedence over the `repos` parameter. Only one of `url`
# and `urls` can be specified, not both.
, url ? ""
, urls ? []
, # The rest of the arguments are just forwarded to `fetchurl`.
...
}:
# only one of url and urls can be specified at a time.
assert (url == "") || (urls == []);
# if repos is empty, then url or urls must be specified.
assert (repos != []) || (url != "") || (urls != []);
let
name_ =
with stdenv.lib; concatStrings [
(replaceChars ["."] ["_"] groupId) "_"
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(replaceChars ["."] ["_"] artifactId) "-"
version
];
mkJarUrl = repoUrl:
with stdenv.lib; concatStringsSep "/" [
(removeSuffix "/" repoUrl)
(replaceChars ["."] ["/"] groupId)
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artifactId
version
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"${artifactId}-${version}${optionalString (!isNull classifier) "-${classifier}"}.jar"
];
urls_ =
if url != "" then [url]
else if urls != [] then urls
else map mkJarUrl repos;
jar =
fetchurl (
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builtins.removeAttrs args ["groupId" "artifactId" "version" "classifier" "repos" "url" ]
// { urls = urls_; name = "${name_}.jar"; }
);
in
stdenv.mkDerivation {
name = name_;
phases = "installPhase fixupPhase";
# By moving the jar to $out/share/java we make it discoverable by java
# packages packages that mention this derivation in their buildInputs.
installPhase = ''
mkdir -p $out/share/java
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ln -s ${jar} $out/share/java/${artifactId}-${version}.jar
'';
# We also add a `jar` attribute that can be used to easily obtain the path
# to the downloaded jar file.
passthru.jar = jar;
}