Build: Move gradle wrapper jar to a dot dir (#30146)

This commit moves the gradle wrapper jar file to a hidden directory, so
that it does not clutter the top level names seen when doing an ls in
the project. The actual jar file is never manually edited, and only
changed by running `./gradlew wrapper ...` so it is not important for
this directory to be "visible".

.gradle-wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.7-all.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.7-all.zip
 zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
 distributionSha256Sum=203f4537da8b8075e38c036a6d14cb71b1149de5bf0a8f6db32ac2833a1d1294

build.gradle

@@ -440,25 +440,18 @@ task run(type: Run) {
   impliesSubProjects = true
 }
 
-task wrapper(type: Wrapper)
-
-gradle.projectsEvaluated {
-
-  allprojects {
-    tasks.withType(Wrapper) { Wrapper wrapper ->
-      wrapper.distributionType = DistributionType.ALL
-
-      wrapper.doLast {
-        final DistributionLocator locator = new DistributionLocator()
-        final GradleVersion version = GradleVersion.version(wrapper.gradleVersion)
-        final URI distributionUri = locator.getDistributionFor(version, wrapper.distributionType.name().toLowerCase(Locale.ENGLISH))
-        final URI sha256Uri = new URI(distributionUri.toString() + ".sha256")
-        final String sha256Sum = new String(sha256Uri.toURL().bytes)
-        wrapper.getPropertiesFile() << "distributionSha256Sum=${sha256Sum}\n"
-      }
-    }
+task wrapper(type: Wrapper) {
+  distributionType = DistributionType.ALL
+  jarFile = file('.gradle-wrapper/gradle-wrapper.jar')
+  doLast {
+    final DistributionLocator locator = new DistributionLocator()
+    final GradleVersion version = GradleVersion.version(gradleVersion)
+    final URI distributionUri = locator.getDistributionFor(version, distributionType.name().toLowerCase(Locale.ENGLISH))
+    final URI sha256Uri = new URI(distributionUri.toString() + ".sha256")
+    final String sha256Sum = new String(sha256Uri.toURL().bytes)
+    final String existingProperties = getPropertiesFile().getText('UTF-8')
+    getPropertiesFile().setText("${existingProperties}distributionSha256Sum=${sha256Sum}\n", 'UTF-8')
   }
-
 }
 
 static void assertLinesInFile(final Path path, final List<String> expectedLines) {

gradlew

@@ -64,7 +64,7 @@ case "`uname`" in
     ;;
 esac
 
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+CLASSPATH=$APP_HOME/.gradle-wrapper/gradle-wrapper.jar
 
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then