Build: Add translations to gradle build (part 1 - jars)

core/build.gradle

@@ -10,6 +10,7 @@ sourceSets {
     main {
         java {
             srcDir 'java/src'
+            srcDir 'java/build/messages-src'
             exclude 'gnu/getopt'
             exclude 'gnu/gettext'
         }
@@ -67,6 +68,16 @@ if (System.getenv("TARGET_JAVA_HOME") == null && JavaVersion.current() != JavaVe
     test.dependsOn scalaTest
 }
 
+// Create the java files from the po files. The jar task will compile them.
+// This requires gettext 0.19 or higher.
+// We don't support the "slow way"
+task bundle {
+    doLast {
+        println "core/java/bundle-messages.sh".execute().text
+    }
+}
+jar.dependsOn bundle
+
 jar {
     manifest {
         attributes 'Specification-Title': 'I2P Core API'

core/java/bundle-messages.sh

@@ -10,6 +10,7 @@
 #
 # zzz - public domain
 #
+cd `dirname $0`
 CLASS=net.i2p.util.messages
 TMPFILE=build/javafiles.txt
 export TZ=UTC