Use Gradle's task configuration avoidance APIs

This can avoid creating an additional 736 tasks (previously 502 out of
1591 were not created). That's not all that important as the build time
is essentially the same, but this lets us see the poor behavior of the
protobuf plugin in our own project and increase our understanding of how
to avoid task creation when developing the plugin. Of the tasks still
being created, protobuf is the highest contributor with 165 tasks,
followed by maven-publish with 76 and appengine with 53. The remaining
59 are from our own build, but indirectly caused by maven-publish.

all/build.gradle

@@ -36,7 +36,7 @@ dependencies {
     api subprojects.minus([project(':grpc-protobuf-lite')])
 }
 
-javadoc {
+tasks.named("javadoc").configure {
     classpath = files(subprojects.collect { subproject ->
         subproject.javadoc.classpath
     })
@@ -49,7 +49,7 @@ javadoc {
     }
 }
 
-task jacocoMerge(type: JacocoMerge) {
+tasks.register("jacocoMerge", JacocoMerge) {
     dependsOn(subprojects.jacocoTestReport.dependsOn)
     dependsOn(project(':grpc-interop-testing').jacocoTestReport.dependsOn)
     mustRunAfter(subprojects.jacocoTestReport.mustRunAfter)
@@ -60,7 +60,7 @@ task jacocoMerge(type: JacocoMerge) {
             .filter { f -> f.exists() }
 }
 
-jacocoTestReport {
+tasks.named("jacocoTestReport").configure {
     dependsOn(jacocoMerge)
     reports {
         xml.required = true
@@ -78,4 +78,4 @@ coveralls {
     sourceDirs = subprojects.sourceSets.main.allSource.srcDirs.flatten()
 }
 
-tasks.coveralls { dependsOn(jacocoTestReport) }
+tasks.named("coveralls").configure { dependsOn tasks.named("jacocoTestReport") }

alts/build.gradle

@@ -52,28 +52,28 @@ configureProtoCompilation()
 
 import net.ltgt.gradle.errorprone.CheckSeverity
 
-[compileJava, compileTestJava].each() {
+[tasks.named("compileJava"), tasks.named("compileTestJava")]*.configure {
     // protobuf calls valueof. Will be fixed in next release (google/protobuf#4046)
-    it.options.compilerArgs += [
+    options.compilerArgs += [
         "-Xlint:-deprecation"
     ]
     // ALTS returns a lot of futures that we mostly don't care about.
-    it.options.errorprone.check("FutureReturnValueIgnored", CheckSeverity.OFF)
+    options.errorprone.check("FutureReturnValueIgnored", CheckSeverity.OFF)
 }
 
-javadoc {
+tasks.named("javadoc").configure {
     exclude 'io/grpc/alts/internal/**'
     exclude 'io/grpc/alts/Internal*'
 }
 
-jar {
+tasks.named("jar").configure {
     // Must use a different archiveClassifier to avoid conflicting with shadowJar
     archiveClassifier = 'original'
 }
 
 // We want to use grpc-netty-shaded instead of grpc-netty. But we also want our
 // source to work with Bazel, so we rewrite the code as part of the build.
-shadowJar {
+tasks.named("shadowJar").configure {
     archiveClassifier = null
     dependencies {
         exclude(dependency {true})

android-interop-testing/build.gradle

@@ -101,7 +101,7 @@ project.tasks['check'].dependsOn checkStyleMain, checkStyleTest
 
 import net.ltgt.gradle.errorprone.CheckSeverity
 
-tasks.withType(JavaCompile) {
+tasks.withType(JavaCompile).configureEach {
     options.compilerArgs += [
             "-Xlint:-cast"
     ]

android/build.gradle

@@ -42,7 +42,7 @@ dependencies {
     testImplementation libraries.truth
 }
 
-task javadocs(type: Javadoc) {
+tasks.register("javadocs", Javadoc) {
     source = android.sourceSets.main.java.srcDirs
     classpath += files(android.getBootClasspath())
     classpath += files({
@@ -58,12 +58,13 @@ task javadocs(type: Javadoc) {
     }
 }
 
-task javadocJar(type: Jar, dependsOn: javadocs) {
+tasks.register("javadocJar", Jar) {
+    dependsOn javadocs
     archiveClassifier = 'javadoc'
     from javadocs.destinationDir
 }
 
-task sourcesJar(type: Jar) {
+tasks.register("sourcesJar", Jar) {
     archiveClassifier = 'sources'
     from android.sourceSets.main.java.srcDirs
 }

api/build.gradle

@@ -28,7 +28,7 @@ dependencies {
     signature "net.sf.androidscents.signature:android-api-level-14:4.0_r4@signature"
 }
 
-javadoc {
+tasks.named("javadoc").configure {
     // We want io.grpc.Internal, but not io.grpc.Internal*
     exclude 'io/grpc/Internal?*.java'
 }

authz/build.gradle

@@ -29,17 +29,17 @@ dependencies {
     signature "org.codehaus.mojo.signature:java17:1.0@signature"
 }
 
-jar {
+tasks.named("jar").configure {
     classifier = 'original'
 }
 
 // TODO(ashithasantosh): Remove javadoc exclusion on adding authorization
 // interceptor implementations.
-javadoc {
+tasks.named("javadoc").configure {
     exclude "io/grpc/authz/*"
 }
 
-shadowJar {
+tasks.named("shadowJar").configure {
     classifier = null
     dependencies {
         exclude(dependency {true})
@@ -74,4 +74,6 @@ publishing {
     }
 }
 
-publishMavenPublicationToMavenRepository.enabled = false
+tasks.named("publishMavenPublicationToMavenRepository").configure {
+    enabled = false
+}

benchmarks/build.gradle

@@ -9,10 +9,7 @@ plugins {
 
 description = "grpc Benchmarks"
 
-startScripts.enabled = false
-run.enabled = false
-
-jmh {
+tasks.named("jmh").configure {
     jvmArgs = ["-server", "-Xms2g", "-Xmx2g"]
 }
 
@@ -46,7 +43,7 @@ dependencies {
 
 import net.ltgt.gradle.errorprone.CheckSeverity
 
-compileJava {
+tasks.named("compileJava").configure {
     // The Control.Void protobuf clashes
     options.errorprone.check("JavaLangClash", CheckSeverity.OFF)
 }
@@ -60,30 +57,38 @@ def vmArgs = [
     "-XX:+PrintGCDetails"
 ]
 
-task qps_client(type: CreateStartScripts) {
+tasks.named("startScripts").configure {
+    enabled = false
+}
+
+tasks.named("run").configure {
+    enabled = false
+}
+
+def qps_client = tasks.register("qps_client", CreateStartScripts) {
     mainClass = "io.grpc.benchmarks.qps.AsyncClient"
     applicationName = "qps_client"
     defaultJvmOpts = vmArgs
     outputDir = new File(project.buildDir, 'tmp/scripts/' + name)
     classpath = startScripts.classpath
 }
 
-task openloop_client(type: CreateStartScripts) {
+def openloop_client = tasks.register("openloop_client", CreateStartScripts) {
     mainClass = "io.grpc.benchmarks.qps.OpenLoopClient"
     applicationName = "openloop_client"
     defaultJvmOpts = vmArgs
     outputDir = new File(project.buildDir, 'tmp/scripts/' + name)
     classpath = startScripts.classpath
 }
 
-task qps_server(type: CreateStartScripts) {
+def qps_server = tasks.register("qps_server", CreateStartScripts) {
     mainClass = "io.grpc.benchmarks.qps.AsyncServer"
     applicationName = "qps_server"
     outputDir = new File(project.buildDir, 'tmp/scripts/' + name)
     classpath = startScripts.classpath
 }
 
-task benchmark_worker(type: CreateStartScripts) {
+def benchmark_worker = tasks.register("benchmark_worker", CreateStartScripts) {
     mainClass = "io.grpc.benchmarks.driver.LoadWorker"
     applicationName = "benchmark_worker"
     defaultJvmOpts = vmArgs

binder/build.gradle

@@ -85,7 +85,7 @@ dependencies {
 
 import net.ltgt.gradle.errorprone.CheckSeverity
 
-tasks.withType(JavaCompile) {
+tasks.withType(JavaCompile).configureEach {
     options.compilerArgs += [
             "-Xlint:-cast"
     ]
@@ -94,7 +94,7 @@ tasks.withType(JavaCompile) {
     options.errorprone.check("UnnecessaryAnonymousClass", CheckSeverity.OFF)
 }
 
-task javadocs(type: Javadoc) {
+tasks.register("javadocs", Javadoc) {
     source = android.sourceSets.main.java.srcDirs
     classpath += files(android.getBootClasspath())
     classpath += files({
@@ -110,12 +110,13 @@ task javadocs(type: Javadoc) {
     }
 }
 
-task javadocJar(type: Jar, dependsOn: javadocs) {
+tasks.register("javadocJar", Jar) {
+    dependsOn javadocs
     archiveClassifier = 'javadoc'
     from javadocs.destinationDir
 }
 
-task sourcesJar(type: Jar) {
+tasks.register("sourcesJar", Jar) {
     archiveClassifier = 'sources'
     from android.sourceSets.main.java.srcDirs
 }