all: migrate gradle build to java-library plugin

all/build.gradle

@@ -31,7 +31,7 @@ for (subproject in rootProject.subprojects) {
 }
 
 dependencies {
-    compile subprojects.minus(project(':grpc-protobuf-lite'))
+    implementation subprojects.minus(project(':grpc-protobuf-lite'))
 }
 
 javadoc {

alts/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id "java"
+    id "java-library"
     id "maven-publish"
 
     id "com.github.johnrengelman.shadow"
@@ -13,35 +13,35 @@ sourceCompatibility = 1.7
 targetCompatibility = 1.7
 
 dependencies {
-    compile project(':grpc-auth'),
-            project(':grpc-core'),
+    api project(':grpc-core')
+    compileOnly libraries.javax_annotation
+    implementation project(':grpc-auth'),
             project(':grpc-grpclb'),
             project(':grpc-protobuf'),
             project(':grpc-stub'),
             libraries.lang,
-            libraries.protobuf,
             libraries.conscrypt
-    def nettyDependency = compile project(':grpc-netty')
-    compile (libraries.google_auth_oauth2_http) {
+    def nettyDependency = implementation project(':grpc-netty')
+    implementation (libraries.google_auth_oauth2_http) {
         // prefer our own versions instead of google-auth-oauth2-http's dependency
         exclude group: 'com.google.guava', module: 'guava'
         // we'll always be more up-to-date
         exclude group: 'io.grpc', module: 'grpc-context'
     }
-    compileOnly libraries.javax_annotation
-
-    shadow configurations.compile.getDependencies().minus(nettyDependency)
-    shadow project(path: ':grpc-netty-shaded', configuration: 'shadow')
-
-    testCompile project(':grpc-testing'),
+    guavaDependency 'implementation'
+    testImplementation project(':grpc-testing'),
             project(':grpc-testing-proto'),
             libraries.guava,
             libraries.guava_testlib,
             libraries.junit,
             libraries.mockito,
             libraries.truth
-    testRuntime libraries.netty_tcnative,
-            libraries.netty_epoll
+    testRuntimeOnly libraries.netty_epoll,
+            libraries.netty_tcnative
+
+    shadow configurations.implementation.getDependencies().minus(nettyDependency),
+            project(path: ':grpc-netty-shaded', configuration: 'shadow')
+
     signature 'org.codehaus.mojo.signature:java17:1.0@signature'
 }
 

android-interop-testing/build.gradle

@@ -61,10 +61,10 @@ dependencies {
             project(':grpc-testing'),
             libraries.junit,
             libraries.truth
-
     implementation (libraries.google_auth_oauth2_http) {
         exclude group: 'org.apache.httpcomponents'
     }
+    censusGrpcMetricDependency 'implementation'
 
     compileOnly libraries.javax_annotation
 

android/build.gradle

@@ -26,13 +26,13 @@ repositories {
 }
 
 dependencies {
-    implementation project(':grpc-core')
-
-    testImplementation project('::grpc-okhttp')
-    testImplementation libraries.androidx_test
-    testImplementation libraries.junit
-    testImplementation libraries.robolectric
-    testImplementation libraries.truth
+    api project(':grpc-core')
+    guavaDependency 'implementation'
+    testImplementation project('::grpc-okhttp'),
+            libraries.androidx_test,
+            libraries.junit,
+            libraries.robolectric,
+            libraries.truth
 }
 
 task javadocs(type: Javadoc) {

api/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id "java"
+    id "java-library"
     id "maven-publish"
 
     id "me.champeau.gradle.jmh"
@@ -11,20 +11,12 @@ description = 'gRPC: API'
 evaluationDependsOn(project(':grpc-context').path)
 
 dependencies {
-    compile project(':grpc-context'),
-            libraries.errorprone,
-            libraries.jsr305,
-            libraries.animalsniffer_annotations
-    compile (libraries.guava) {
-        // prefer our own versions from libraries instead of Guava's dependency
-        exclude group: 'com.google.errorprone', module: 'error_prone_annotations'
-        exclude group: 'com.google.code.findbugs', module: 'jsr305'
-        exclude group: 'org.codehaus.mojo', module: 'animal-sniffer-annotations'
-    }
-
-    testCompile project(':grpc-context').sourceSets.test.output,
-            project(':grpc-testing'),
+    api project(':grpc-context'),
+            libraries.jsr305
+    guavaDependency 'implementation'
+    testImplementation project(':grpc-context').sourceSets.test.output,
             project(':grpc-grpclb'),
+            project(':grpc-testing'),
             libraries.guava_testlib
 
     jmh project(':grpc-core')

auth/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id "java"
+    id "java-library"
     id "maven-publish"
 
     id "me.champeau.gradle.japicmp"
@@ -8,10 +8,12 @@ plugins {
 
 description = "gRPC: Auth"
 dependencies {
-    compile project(':grpc-api'),
+    api project(':grpc-api'),
             libraries.google_auth_credentials
-    testCompile project(':grpc-testing'),
+    guavaDependency 'implementation'
+    testImplementation project(':grpc-testing'),
             libraries.google_auth_oauth2_http
+
     signature "org.codehaus.mojo.signature:java17:1.0@signature"
     signature "net.sf.androidscents.signature:android-api-level-14:4.0_r4@signature"
 }

benchmarks/build.gradle

@@ -21,20 +21,20 @@ configurations {
 }
 
 dependencies {
-    compile project(':grpc-core'),
+    alpnagent libraries.jetty_alpn_agent
+
+    compileOnly libraries.javax_annotation
+    implementation project(':grpc-core'),
             project(':grpc-netty'),
             project(':grpc-okhttp'),
             project(':grpc-stub'),
             project(':grpc-protobuf'),
             project(':grpc-testing'),
             libraries.hdrhistogram,
-            libraries.netty_tcnative,
+            libraries.math,
             libraries.netty_epoll,
-            libraries.math
-    compileOnly libraries.javax_annotation
-    alpnagent libraries.jetty_alpn_agent
-
-    testCompile libraries.junit,
+            libraries.netty_tcnative
+    testImplementation libraries.junit,
             libraries.mockito
 }
 

build.gradle

@@ -41,6 +41,9 @@ subprojects {
         }
     }
 
+    def isAndroid = project.name in [
+            'grpc-android', 'grpc-android-interop-testing', 'grpc-cronet']
+
     ext {
         def exeSuffix = osdetector.os == 'windows' ? ".exe" : ""
         protocPluginBaseName = 'protoc-gen-grpc-java'
@@ -54,7 +57,6 @@ subprojects {
         opencensusVersion = '0.24.0'
 
         configureProtoCompilation = {
-            boolean isAndroid = project.getName().contains('android')
             String generatedSourcePath = "${projectDir}/src/generated"
             project.protobuf {
                 protoc {
@@ -185,18 +187,76 @@ subprojects {
             // Jetty ALPN dependencies
             jetty_alpn_agent: 'org.mortbay.jetty.alpn:jetty-alpn-agent:2.0.9'
         ]
+
+        // A util function to config guava dependency with the given configuration
+        // name. We exclude some of its transitive dependencies and manually
+        // add them with a specific version.
+        guavaDependency = { configurationName ->
+            dependencies."$configurationName"(libraries.guava) {
+                exclude group: 'com.google.code.findbugs', module: 'jsr305'
+                exclude group: 'com.google.errorprone', module: 'error_prone_annotations'
+                exclude group: 'org.codehaus.mojo', module: 'animal-sniffer-annotations'
+            }
+            dependencies."$configurationName" libraries.errorprone
+            dependencies.runtimeOnly libraries.animalsniffer_annotations
+            dependencies.runtimeOnly libraries.jsr305
+        }
+
+        // A util function to config opencensus_api dependency with the given
+        // configuration name. We exclude some of its transitive dependencies
+        // and manually add them with a specific version.
+        censusApiDependency = { configurationName ->
+            dependencies."$configurationName"(libraries.opencensus_api) {
+                exclude group: 'com.google.code.findbugs', module: 'jsr305'
+                exclude group: 'com.google.guava', module: 'guava'
+                // we'll always be more up-to-date
+                exclude group: 'io.grpc', module: 'grpc-context'
+            }
+            dependencies.runtimeOnly project(':grpc-context')
+            dependencies.runtimeOnly libraries.jsr305
+            guavaDependency 'runtimeOnly'
+        }
+
+        // A util function to config opencensus_contrib_grpc_metrics dependency
+        // with the given configuration name. We exclude some of its transitive
+        // dependencies and manually add them with a specific version.
+        censusGrpcMetricDependency = { configurationName ->
+            dependencies."$configurationName"(libraries.opencensus_contrib_grpc_metrics) {
+                exclude group: 'com.google.code.findbugs', module: 'jsr305'
+                exclude group: 'com.google.guava', module: 'guava'
+                // we'll always be more up-to-date
+                exclude group: 'io.grpc', module: 'grpc-context'
+            }
+            dependencies.runtimeOnly project(':grpc-context')
+            dependencies.runtimeOnly libraries.jsr305
+            guavaDependency 'runtimeOnly'
+        }
+
+        // A util function to config perfmark dependency with the given configuration
+        // name. We exclude some of its transitive dependencies and manually
+        // add them with a specific version.
+        perfmarkDependency = { configurationName ->
+            dependencies."$configurationName"(libraries.perfmark) {
+                exclude group: 'com.google.errorprone', module: 'error_prone_annotations'
+            }
+            dependencies.runtimeOnly libraries.errorprone
+        }
     }
 
-    // Define a separate configuration for managing the dependency on Jetty ALPN agent.
     configurations {
-        compile {
-            // Detect Maven Enforcer's dependencyConvergence failures. We only
-            // care for artifacts used as libraries by others.
-            if (!(project.name in [
+        // Detect Maven Enforcer's dependencyConvergence failures. We only
+        // care for artifacts used as libraries by others.
+        if (isAndroid && !(project.name in ['grpc-android-interop-testing'])) {
+            releaseRuntimeClasspath {
+                resolutionStrategy.failOnVersionConflict()
+            }
+        }
+        if (!isAndroid && !(project.name in [
                 'grpc-benchmarks',
                 'grpc-interop-testing',
                 'grpc-gae-interop-testing-jdk8',
-            ])) {
+        ])) {
+            runtimeClasspath {
                 resolutionStrategy.failOnVersionConflict()
             }
         }

census/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id "java"
+    id "java-library"
     id "maven-publish"
 }
 
@@ -8,27 +8,11 @@ description = 'gRPC: Census'
 evaluationDependsOn(project(':grpc-api').path)
 
 dependencies {
-    compile project(':grpc-api')
-
-    compile (libraries.opencensus_api) {
-        // prefer 3.0.2 from libraries instead of 3.0.1
-        exclude group: 'com.google.code.findbugs', module: 'jsr305'
-        // prefer 20.0 from libraries instead of 19.0
-        exclude group: 'com.google.guava', module: 'guava'
-        // we'll always be more up-to-date
-        exclude group: 'io.grpc', module: 'grpc-context'
-    }
-
-    compile (libraries.opencensus_contrib_grpc_metrics) {
-        // prefer 3.0.2 from libraries instead of 3.0.1
-        exclude group: 'com.google.code.findbugs', module: 'jsr305'
-        // we'll always be more up-to-date
-        exclude group: 'io.grpc', module: 'grpc-context'
-        // prefer 20.0 from libraries instead of 19.0
-        exclude group: 'com.google.guava', module: 'guava'
-    }
-
-    testCompile project(':grpc-api').sourceSets.test.output,
+    api project(':grpc-api')
+    censusApiDependency 'implementation'
+    censusGrpcMetricDependency 'implementation'
+    guavaDependency 'implementation'
+    testImplementation project(':grpc-api').sourceSets.test.output,
             project(':grpc-context').sourceSets.test.output,
             project(':grpc-core').sourceSets.test.output,
             project(':grpc-testing'),

compiler/build.gradle

@@ -126,14 +126,14 @@ model {
 }
 
 configurations {
-    testLiteCompile
+    testLiteImplementation
 }
 
 dependencies {
-    testCompile project(':grpc-protobuf'),
+    testImplementation project(':grpc-protobuf'),
             project(':grpc-stub'),
             libraries.javax_annotation
-    testLiteCompile project(':grpc-protobuf-lite'),
+    testLiteImplementation project(':grpc-protobuf-lite'),
             project(':grpc-stub'),
             libraries.javax_annotation
 }

context/build.gradle

@@ -10,7 +10,9 @@ plugins {
 description = 'gRPC: Context'
 
 dependencies {
-    testCompile libraries.jsr305, libraries.guava_testlib
+    testImplementation libraries.guava_testlib,
+            libraries.jsr305
+
     signature "org.codehaus.mojo.signature:java17:1.0@signature"
     signature "net.sf.androidscents.signature:android-api-level-14:4.0_r4@signature"
 }

core/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id "java"
+    id "java-library"
     id "maven-publish"
 
     id "me.champeau.gradle.japicmp"
@@ -13,20 +13,17 @@ evaluationDependsOn(project(':grpc-context').path)
 evaluationDependsOn(project(':grpc-api').path)
 
 dependencies {
-    compile project(':grpc-api'),
-            libraries.gson,
-            libraries.android_annotations,
-            libraries.errorprone // prefer our version to perfmark's 2.3.3
-    compile (libraries.perfmark) {
-        exclude group: 'com.google.errorprone', module: 'error_prone_annotations'
-    }
-
-    testCompile project(':grpc-context').sourceSets.test.output,
-            project(':grpc-api').sourceSets.test.output,
-            project(':grpc-testing'),
+    api project(':grpc-api')
+    implementation libraries.android_annotations,
+            libraries.animalsniffer_annotations,
+            libraries.gson
+    guavaDependency 'implementation'
+    perfmarkDependency 'implementation'
+    testImplementation project(':grpc-api').sourceSets.test.output,
+            project(':grpc-context').sourceSets.test.output,
             project(':grpc-grpclb'),
+            project(':grpc-testing'),
             libraries.guava_testlib
-
     testRuntimeOnly project(':grpc-census')
 
     jmh project(':grpc-testing')