WIP: Add task for generating man pages

sop-java-picocli/build.gradle

@@ -4,6 +4,7 @@
 
 plugins {
     id 'application'
+    id 'org.asciidoctor.jvm.convert' version '3.1.0'
 }
 
 dependencies {
@@ -23,6 +24,7 @@ dependencies {
 
     // CLI
     implementation "info.picocli:picocli:$picocliVersion"
+    annotationProcessor "info.picocli:picocli-codegen:$picocliVersion"
 
     // @Nonnull, @Nullable...
     implementation "com.google.code.findbugs:jsr305:$jsrVersion"
@@ -49,3 +51,24 @@ jar {
         exclude "META-INF/*.RSA"
     }
 }
+
+task generateManpageAsciiDoc(type: JavaExec) {
+    dependsOn(classes)
+    group = "Documentation"
+    description = "Generate AsciiDoc manpage"
+    classpath(configurations.annotationProcessor, sourceSets.main.runtimeClasspath)
+    systemProperty("user.language", "en")
+    main 'picocli.codegen.docgen.manpage.ManPageGenerator'
+    args mainClassName, "--outdir=${project.buildDir}/generated-picocli-docs", "-v" //, "--template-dir=src/docs/mantemplates"
+}
+
+apply plugin: 'org.asciidoctor.jvm.convert'
+asciidoctor {
+    dependsOn(generateManpageAsciiDoc)
+    sourceDir = file("${project.buildDir}/generated-picocli-docs")
+    outputDir = file("${project.buildDir}/docs")
+    logDocuments = true
+    outputOptions {
+        backends = ['manpage', 'html5']
+    }
+}