add javadoc badge. (#76)

README.md

@@ -6,7 +6,7 @@
 
 _ZIO SBT_ is an sbt plugin for ZIO projects. It provides high-level SBT utilities that simplify the development of ZIO applications.
 
-[![Production Ready](https://img.shields.io/badge/Project%20Stage-Production%20Ready-brightgreen.svg)](https://github.com/zio/zio/wiki/Project-Stages) ![CI Badge](https://github.com/zio/zio-sbt/workflows/CI/badge.svg) [![Sonatype Releases](https://img.shields.io/nexus/r/https/oss.sonatype.org/dev.zio/zio-sbt-website_2.12.svg?label=Sonatype%20Release)](https://oss.sonatype.org/content/repositories/releases/dev/zio/zio-sbt-website_2.12/) [![Sonatype Snapshots](https://img.shields.io/nexus/s/https/oss.sonatype.org/dev.zio/zio-sbt-website_2.12.svg?label=Sonatype%20Snapshot)](https://oss.sonatype.org/content/repositories/snapshots/dev/zio/zio-sbt-website_2.12/) [![ZIO SBT](https://img.shields.io/github/stars/zio/zio-sbt?style=social)](https://github.com/zio/zio-sbt)
+[![Production Ready](https://img.shields.io/badge/Project%20Stage-Production%20Ready-brightgreen.svg)](https://github.com/zio/zio/wiki/Project-Stages) ![CI Badge](https://github.com/zio/zio-sbt/workflows/CI/badge.svg) [![Sonatype Releases](https://img.shields.io/nexus/r/https/oss.sonatype.org/dev.zio/zio-sbt-website_2.12.svg?label=Sonatype%20Release)](https://oss.sonatype.org/content/repositories/releases/dev/zio/zio-sbt-website_2.12/) [![Sonatype Snapshots](https://img.shields.io/nexus/s/https/oss.sonatype.org/dev.zio/zio-sbt-website_2.12.svg?label=Sonatype%20Snapshot)](https://oss.sonatype.org/content/repositories/snapshots/dev/zio/zio-sbt-website_2.12/) [![javadoc](https://javadoc.io/badge2/dev.zio/zio-sbt-docs/javadoc.svg)](https://javadoc.io/doc/dev.zio/zio-sbt-docs) [![ZIO SBT](https://img.shields.io/github/stars/zio/zio-sbt?style=social)](https://github.com/zio/zio-sbt)
 
 ## Installation
 

zio-sbt-website/src/main/scala/zio/sbt/WebsitePlugin.scala

@@ -107,7 +107,8 @@ object WebsitePlugin extends sbt.AutoPlugin {
                 WebsiteUtils.generateProjectBadges(
                   projectStage = badge.projectStage,
                   groupId = organization.value,
-                  artifact = badge.artifact,
+                  artifactId = badge.artifact,
+                  docsArtifactId = moduleName.value,
                   githubUser = "zio",
                   githubRepo =
                     scmInfo.value.map(_.browseUrl.getPath.split('/').last).getOrElse("github repo not provided"),

zio-sbt-website/src/main/scala/zio/sbt/WebsiteUtils.scala

@@ -55,6 +55,12 @@ object WebsiteUtils {
     s"[![$projectName]($githubBadge)]($repoUrl)"
   }
 
+  def javadocBadge(groupId: String, artifactId: String): String = {
+    val badge      = s"https://javadoc.io/badge2/$groupId/$artifactId/javadoc.svg"
+    val javadocUrl = s"https://javadoc.io/doc/$groupId/$artifactId"
+    s"[![javadoc]($badge)]($javadocUrl)"
+  }
+
   def discord =
     "[![Chat on Discord!](https://img.shields.io/discord/629491597070827530?logo=discord)](https://discord.gg/2ccFBr4)"
 
@@ -95,18 +101,20 @@ object WebsiteUtils {
   def generateProjectBadges(
     projectStage: ProjectStage,
     groupId: String,
-    artifact: String,
+    artifactId: String,
+    docsArtifactId: String,
     githubUser: String,
     githubRepo: String,
     projectName: String
   ): String = {
     val stage    = projectStageBadge(projectStage)
     val ci       = ciBadge(githubUser, githubRepo)
-    val release  = releaseBadge(groupId, artifact)
-    val snapshot = snapshotBadge(groupId, artifact)
+    val release  = releaseBadge(groupId, artifactId)
+    val snapshot = snapshotBadge(groupId, artifactId)
     val github   = githubBadge(githubUser, githubRepo, projectName)
+    val javadoc  = javadocBadge(groupId, docsArtifactId)
 
-    s"$stage $ci $release $snapshot $github"
+    s"$stage $ci $release $snapshot $javadoc $github"
   }
 
   def generateReadme(