buildMaven: Handle authenticated repos

pkgs/build-support/build-maven.nix

···
-{ stdenv, maven, runCommand, writeText, fetchurl, lib }:
+{ 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.
···
 
   script = writeText "build-maven-repository.sh" ''
     ${lib.concatStrings (map (dep: let
-      inherit (dep) url sha1 groupId artifactId version;
+      inherit (dep) url sha1 groupId artifactId version authenticated;
 
-      fetch = fetchurl { inherit url sha1; };
+      fetch = (if authenticated then requireFile else fetchurl) {
+        inherit url sha1;
+      };
     in ''
       dir=$out/$(echo ${groupId} | sed 's|\.|/|g')/${artifactId}/${version}
       mkdir -p $dir