Use 'grace-doc' Gradle plugin to generate documentation

Closes gh-26

Author: rainboyan

build.gradle

@@ -7,7 +7,6 @@ buildscript {
     dependencies {
         classpath "org.graceframework:grace-gradle-plugin:$graceVersion"
         // classpath "org.graceframework.plugins:asset-pipeline-gradle:$assetPipelineVersion"
-        classpath 'org.asciidoctor:asciidoctor-gradle-jvm:4.0.3'
         classpath "com.github.erdi:webdriver-binaries-gradle-plugin:$webdriverBinariesVersion"
         classpath "org.graceframework.plugins:views-gradle:6.3.0-M1"
         classpath "io.github.gradle-nexus:publish-plugin:2.0.0"
@@ -32,8 +31,10 @@ ext."signing.keyId" = System.getenv("SIGNING_KEY") ?: project.hasProperty("signi
 ext."signing.password" = System.getenv("SIGNING_PASSPHRASE") ?: project.hasProperty("signing.password") ? project.getProperty('signing.password') : null
 ext."signing.secretKeyRingFile" = project.hasProperty("signing.secretKeyRingFile") ? project.getProperty('signing.secretKeyRingFile') : null
 
+apply plugin: 'groovy'
 apply plugin: 'maven-publish'
 apply plugin: "io.github.gradle-nexus.publish-plugin"
+apply plugin: 'org.graceframework.grace-doc'
 
 nexusPublishing {
     repositories {
@@ -50,23 +51,33 @@ nexusPublishing {
     }
 }
 
-subprojects { project ->
-
+allprojects {
     ext {
         groovyVersion = System.getenv('CI_GROOVY_VERSION') ?: project.groovyVersion
     }
 
     repositories {
-        // mavenLocal()
         mavenCentral()
-        if(groovyVersion && groovyVersion.endsWith('-SNAPSHOT')) {
+        if (project.projectVersion.endsWith('-SNAPSHOT')) {
             maven {
                 name = 'Sonatype OSS Snapshot Repo'
-                url = 'https://s01.oss.sonatype.org/content/repositories/snapshots/'
+                url = "https://s01.oss.sonatype.org/content/repositories/snapshots/"
             }
         }
     }
 
+    configurations {
+        documentation
+    }
+
+    dependencies {
+        documentation "com.github.javaparser:javaparser-core:$javaParserCoreVersion"
+        documentation "org.apache.groovy:groovy:$groovyVersion"
+        documentation "org.apache.groovy:groovy-ant:$groovyVersion"
+    }
+}
+
+subprojects { project ->
     if (project.name.startsWith("examples")) {
         group = "examples"
 
@@ -268,3 +279,43 @@ subprojects { project ->
         shouldRunAfter(tasks.withType(Sign))
     }
 }
+
+
+def cleanTask = project.tasks.findByName('clean')
+if (cleanTask == null) {
+    task clean(type: Delete) {
+        delete(buildDir)
+    }
+}
+else {
+    cleanTask.doLast {
+        ant.delete(dir: 'build/docs')
+    }
+}
+
+tasks.withType(Groovydoc) {
+    group = 'Documentation'
+    docTitle = "Grace Data MongoDB - ${project.version}"
+    destinationDir = project.file('build/docs/manual/api')
+    def files = []
+    project.rootProject.subprojects
+            .findAll { !it.name != 'docs' && !it.name.startsWith('examples') }
+            .each { subproject ->
+                if(subproject.file('src/main/groovy').exists()) {
+                    files += subproject.files('src/main/groovy')
+                }
+                if(subproject.file('src/main/java').exists()) {
+                    files += subproject.files('src/main/java')
+                }
+            }
+    if (project.file('src/main/groovy').exists()) {
+        files += project.files('src/main/groovy')
+    }
+    source = files
+    classpath += configurations.documentation
+}
+
+docs {
+    dependsOn groovydoc
+    sourceDir = project.file('src/docs')
+}

docs/build.gradle

@@ -5,9 +5,6 @@ include "grace-datastore-gorm-bson"
 include "grace-datastore-gorm-mongodb"
 include "grace-datastore-gorm-mongodb-ext"
 
-// documentation
-include 'docs'
-
 // plugins
 include 'grace-plugin'