Convert update_dependency procedure to use gradle proxy

Collect the set of dependencies using the gradle proxy and push to GCS using
gcs_sync.

TESTED: Verified that the script works against both unupdated and up-to-date
dependency sets, verified that the proxy server is destroyed after completion.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=241529357

gradle/build.gradle

@@ -13,7 +13,6 @@ buildscript {
 }
 
 plugins {
-  id 'maven-publish'
   id 'nebula.lint' version '10.4.2'
   // Config helper for annotation processors such as AutoValue and Dagger.
   // Ensures that source code is generated at an appropriate location.
@@ -73,60 +72,6 @@ task stage {
   description = 'Generates application directories for all services.'
 }
 
-
-if (publishUrl) {
-  publishing {
-    repositories {
-      maven {
-        url publishUrl
-      }
-    }
-  }
-}
-
-ext.processedDependencies = [] as Set<String>
-ext.processDependencies = { Set<ResolvedDependency> deps ->
-
-  if (deps.isEmpty()) {
-    return
-  }
-  deps.each { ResolvedDependency dep ->
-    if (dep.moduleGroup == "nomulus" ||
-        rootProject.processedDependencies.contains(dep.module.toString())) {
-      return
-    }
-    def name = "${dep.moduleGroup}_${dep.moduleName}_${dep.moduleVersion}"
-    rootProject.publishing {
-      publications {
-        "${name}"(MavenPublication) {
-          groupId = dep.moduleGroup
-          artifactId = dep.moduleName
-          version = dep.moduleVersion
-          dep.moduleArtifacts.each { moduleArtifact ->
-            artifact(moduleArtifact.file) {
-              classifier = moduleArtifact.classifier
-            }
-          }
-          if (!dep.children.isEmpty()) {
-            pom.withXml {
-              def dependenciesNode = asNode().appendNode("dependencies")
-              dep.children.each {
-                def dependencyNode =
-                    dependenciesNode.appendNode("dependency")
-                dependencyNode.appendNode("groupId", it.moduleGroup)
-                dependencyNode.appendNode("artifactId", it.moduleName)
-                dependencyNode.appendNode("version", it.moduleVersion)
-              }
-            }
-          }
-        }
-      }
-    }
-    rootProject.processedDependencies.add(dep.module.toString())
-    rootProject.processDependencies(dep.children)
-  }
-}
-
 ext.constructMavenCoordinate = { deps, distinctMetadata ->
   if (deps.isEmpty()) {
     return
@@ -146,31 +91,15 @@ allprojects {
   if (project.name == 'services') return
 
   repositories {
-    if (rootProject.repositoryUrl) {
+    if (rootProject.mavenUrl) {
       maven {
-        url rootProject.repositoryUrl
+        url rootProject.mavenUrl
       }
     } else {
       mavenCentral()
     }
   }
 
-  ext.generateDependencyPublications = {
-    def allconfigs = []
-
-    allconfigs.addAll(configurations)
-    // This only adds buildscript dependencies declare in this project.
-    allconfigs.addAll(buildscript.configurations)
-
-    allconfigs.each {
-      if (!it.isCanBeResolved()) {
-        return
-      }
-      rootProject.processDependencies(
-          it.resolvedConfiguration.firstLevelModuleDependencies)
-    }
-  }
-
   // This task generates a Maven coordinate for each resolved dependency and
   // stores them in the given file.
   task generateMavenCoordinateForDependency {
@@ -218,8 +147,6 @@ subprojects {
     lockAllConfigurations()
   }
 
-  apply plugin: 'maven-publish'
-
   def services = [':services:default',
                   ':services:backend',
                   ':services:tools',
@@ -290,7 +217,6 @@ subprojects {
 
     appengine {
       deploy {
-        // TODO: change this to a variable.
         project = gcpProject
       }
     }
@@ -413,5 +339,3 @@ subprojects {
     }
   }
 }
-
-generateDependencyPublications()

gradle/buildSrc/build.gradle

@@ -1,12 +1,12 @@
 
 repositories {
-  if (project.ext.properties.repositoryUrl == null) {
+  if (project.ext.properties.mavenUrl == null) {
     println "Plugins: Using Maven central..."
     mavenCentral()
   } else {
     maven {
-      println "Plugins: Using repo ${repositoryUrl}..."
-      url repositoryUrl
+      println "Plugins: Using repo ${mavenUrl}..."
+      url mavenUrl
     }
   }
 }

gradle/core/build.gradle

@@ -687,5 +687,3 @@ task nomulus(type: Jar) {
   with jar
   dependsOn project(':third_party').jar
 }
-
-generateDependencyPublications()

gradle/gradle.properties

@@ -1,5 +1,5 @@
-repositoryUrl=
-publishUrl=
+mavenUrl=
+pluginsUrl=
 uploaderDestination=
 uploaderCredentialsFile=
 uploaderMultithreadedUpload=

gradle/proxy/build.gradle

@@ -74,5 +74,3 @@ dependencies {
   annotationProcessor deps['com.google.dagger:dagger-compiler']
   testAnnotationProcessor deps['com.google.dagger:dagger-compiler']
 }
-
-generateDependencyPublications()

gradle/settings.gradle

@@ -1,9 +1,9 @@
-if (repositoryUrl) {
-  println "Using repository $repositoryUrl for plugins"
+if (pluginsUrl) {
+  println "Using repository $pluginsUrl for plugins"
   pluginManagement {
     repositories {
       maven {
-        url repositoryUrl
+        url pluginsUrl
       }
     }
   }

gradle/util/build.gradle

@@ -30,5 +30,3 @@ dependencies {
   testAnnotationProcessor deps['com.google.auto.value:auto-value']
   testAnnotationProcessor deps['com.google.dagger:dagger-compiler']
 }
-
-generateDependencyPublications()