Update Gradle task dependencies to remove dependsOn 'build' task (#7255)

It is generally discouraged to add dependencies on 'build', so 'javadocCleanup'
and 'jacocoTestReport' have been removed and put on better tasks. Also,
'jacocoTestReport' needs input from the test results.

Updated task dependencies:
- Gradle 'javadoc' task is finalized by 'javadocCleanup', and 'javadocCleanup'
  no longer directly invoked by 'build'
- Gradle 'jacocoTestReport' task run by 'check' instead of 'build', and
  'jacocoTestReport' depends on 'test' and 'testng'

Changes due to dependency updates:
- Add 'javadoc' generation task on Github actions that only 'build'
- Remove 'javadocCleanup' task from Github action as 'publish...' tasks
  already dependent on 'javadoc'

Miscellaneous tangential cleanup:
- Remove "pr" parameter on command line in Github workflow as parameter
  is no longer functional
- Enclose source/target compatibility in Gradle java block

.github/workflows/gradle_branch.yml

@@ -27,6 +27,8 @@ jobs:
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Build branch without snapshot
-      run: ./gradlew -PreleaseMode=pr build --stacktrace
+      run: ./gradlew build --stacktrace
     - name: Upload to Codecov  
       uses: codecov/codecov-action@v1
+    - name: Generate Javadocs
+      run: ./gradlew javadoc --stacktrace

.github/workflows/gradle_jdk11.yml

@@ -29,6 +29,6 @@ jobs:
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Build PR
-      run: ./gradlew -PreleaseMode=pr build --stacktrace
-    #- name: Upload to Codecov  
-    #  uses: codecov/codecov-action@v1
+      run: ./gradlew build --stacktrace
+    - name: Generate Javadocs
+      run: ./gradlew javadoc --stacktrace

.github/workflows/gradle_pr.yml

@@ -1,7 +1,7 @@
 # This workflow will build a Java project with Gradle
 # For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
 
-name: PR
+name: Pull Request
 
 on:
   pull_request:
@@ -27,6 +27,8 @@ jobs:
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Build PR
-      run: ./gradlew -PreleaseMode=pr build --stacktrace
+      run: ./gradlew build --stacktrace
     - name: Upload to Codecov  
       uses: codecov/codecov-action@v1
+    - name: Generate Javadocs
+      run: ./gradlew javadoc --stacktrace

.github/workflows/gradle_release.yml

@@ -40,7 +40,7 @@ jobs:
     - name: Upload to Codecov  
       uses: codecov/codecov-action@v1
     - name: Upload release
-      run: ./gradlew -PreleaseMode=full javadocCleanup uploadArchives --no-daemon --no-parallel --stacktrace
+      run: ./gradlew -PreleaseMode=full uploadArchives --no-daemon --no-parallel --stacktrace
       env:
         # Define secrets at https://github.com/ReactiveX/RxJava/settings/secrets/actions
         # ------------------------------------------------------------------------------ 

.github/workflows/gradle_snapshot.yml

@@ -34,7 +34,7 @@ jobs:
     - name: Build and Snapshot branch
       run: ./gradlew -PreleaseMode=branch build --stacktrace --no-daemon
     - name: Upload Snapshot
-      run: ./gradlew -PreleaseMode=branch javadocCleanup uploadArchives --no-daemon --no-parallel --stacktrace
+      run: ./gradlew -PreleaseMode=branch uploadArchives --no-daemon --no-parallel --stacktrace
       env:
         # Define secrets at https://github.com/ReactiveX/RxJava/settings/secrets/actions
         # ------------------------------------------------------------------------------ 
@@ -48,4 +48,3 @@ jobs:
         # ------------------------------------------------------------------------------
       env:
         JAVADOCS_TOKEN: ${{ secrets.JAVADOCS_TOKEN }}
-

build.gradle

@@ -36,9 +36,6 @@ group = "io.reactivex.rxjava3"
 version = project.properties["VERSION_NAME"]
 description = "RxJava: Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM."
 
-sourceCompatibility = JavaVersion.VERSION_1_8
-targetCompatibility = JavaVersion.VERSION_1_8
-
 repositories {
     mavenCentral()
 }
@@ -57,10 +54,17 @@ dependencies {
     testImplementation "com.google.guava:guava:$guavaVersion"
 }
 
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}
+
 tasks.withType(JavaCompile) {
     options.compilerArgs << "-parameters"
 }
 
+apply from: file("gradle/javadoc_cleanup.gradle")
+
 javadoc {
     failOnError = false
     exclude "**/internal/**"
@@ -80,6 +84,8 @@ javadoc {
         "https://docs.oracle.com/javase/8/docs/api/",
         "http://www.reactive-streams.org/reactive-streams-${reactiveStreamsVersion}-javadoc/"
     )
+
+    finalizedBy javadocCleanup
 }
 
 animalsniffer {
@@ -172,13 +178,16 @@ jacoco {
 }
 
 jacocoTestReport {
+    dependsOn test
+    dependsOn testng
+
     reports {
         xml.enabled = true
         html.enabled = true
     }
 }
 
-build.dependsOn jacocoTestReport
+check.dependsOn jacocoTestReport
 
 checkstyle {
     configFile = rootProject.file("config/checkstyle/checkstyle.xml")
@@ -189,8 +198,6 @@ checkstyle {
     ]
 }
 
-apply from: file("gradle/javadoc_cleanup.gradle")
-
 if (rootProject.hasProperty("releaseMode")) {
     logger.lifecycle("ReleaseMode: {}", rootProject.releaseMode)
 

gradle/javadoc_cleanup.gradle

@@ -57,4 +57,3 @@ def fixJavadocFile(file) {
     file.setText(fileContents, 'UTF-8');
 }
 
-build.dependsOn javadocCleanup