all: generate automatic module name in the manifest

api/build.gradle

@@ -21,6 +21,12 @@ compileContextJava {
     targetCompatibility = 1.7
 }
 
+// override default module name assigned
+tasks.named("jar").configure {
+    manifest {
+        attributes('Automatic-Module-Name': 'io.grpc')
+    }
+}
 
 dependencies {
     compileOnly sourceSets.context.output

build.gradle

@@ -201,7 +201,8 @@ subprojects {
         tasks.named("jar").configure {
             manifest {
                 attributes('Implementation-Title': name,
-                        'Implementation-Version': project.version)
+                        'Implementation-Version': project.version,
+                        'Automatic-Module-Name': 'io.grpc.' + project.name.substring(5)) // default name inferred from artifact
             }
         }
 

core/build.gradle

@@ -56,6 +56,12 @@ tasks.named("javadoc").configure {
     exclude 'io/grpc/perfmark/**'
 }
 
+tasks.named("jar").configure {
+    manifest {
+        attributes('Automatic-Module-Name': 'io.grpc.internal')
+    }
+}
+
 animalsniffer {
     // Don't check sourceSets.jmh
     sourceSets = [

gcp-observability/build.gradle

@@ -19,6 +19,12 @@ tasks.named("compileJava").configure {
             "|")
 }
 
+tasks.named("jar").configure {
+    manifest {
+        attributes('Automatic-Module-Name': 'io.grpc.gcp.observability')
+    }
+}
+
 dependencies {
     annotationProcessor libraries.auto.value
     api project(':grpc-api')

netty/shaded/build.gradle

@@ -70,6 +70,9 @@ dependencies {
 tasks.named("jar").configure {
     // Must use a different archiveClassifier to avoid conflicting with shadowJar
     archiveClassifier = 'original'
+    manifest {
+        attributes('Automatic-Module-Name': 'io.grpc.netty.shaded')
+    }
 }
 
 tasks.named("shadowJar").configure {

protobuf-lite/build.gradle

@@ -21,6 +21,12 @@ dependencies {
     signature libraries.signature.android
 }
 
+tasks.named("jar").configure {
+    manifest {
+        attributes('Automatic-Module-Name': 'io.grpc.protobuf.lite')
+    }
+}
+
 tasks.named("compileTestJava").configure {
     options.compilerArgs += [
         "-Xlint:-cast"

testing-proto/build.gradle

@@ -8,6 +8,13 @@ plugins {
 
 description = "gRPC: Testing Protos"
 
+// override default module name assigned
+tasks.named("jar").configure {
+    manifest {
+        attributes('Automatic-Module-Name': 'io.grpc.testing.protobuf')
+    }
+}
+
 dependencies {
     api project(':grpc-protobuf'),
             project(':grpc-stub')