Update for GitBucket 4.21.0

Author: takezoe

Diff for: README.md

@@ -4,6 +4,7 @@ This is a GitBucket plug-in which provides code snippet repository like Gist.
 
 Plugin version | GitBucket version
 :--------------|:--------------------
+4.12.x         | 4.21.x -
 4.11.x         | 4.19.x -
 4.10.x         | 4.15.x - 4.18.x
 4.9.x          | 4.14.x

Diff for: build.sbt

@@ -1,8 +1,8 @@
 organization := "io.github.gitbucket"
 name := "gitbucket-gist-plugin"
-version := "4.11.0"
+version := "4.12.0"
 scalaVersion := "2.12.4"
-gitbucketVersion := "4.19.0"
+gitbucketVersion := "4.21.0"
 
 scalacOptions := Seq("-deprecation", "-feature", "-language:postfixOps")
 javacOptions in compile ++= Seq("-target", "8", "-source", "8")

Diff for: src/main/scala/Plugin.scala

@@ -33,7 +33,8 @@ class Plugin extends gitbucket.core.plugin.Plugin {
     new Version("4.9.0"),
     new Version("4.9.1"),
     new Version("4.10.0"),
-    new Version("4.11.0")
+    new Version("4.11.0"),
+    new Version("4.12.0")
   )
 
   override def initialize(registry: PluginRegistry, context: ServletContext, settings: SystemSettings): Unit = {

Diff for: src/main/scala/gitbucket/gist/controller/GistController.scala

@@ -193,9 +193,7 @@ trait GistControllerBase extends ControllerBase {
         case Right((revisions, hasNext)) => {
           val commits = revisions.map { revision =>
             defining(JGitUtil.getRevCommitFromId(git, git.getRepository.resolve(revision.id))){ revCommit =>
-              JGitUtil.getDiffs(git, revision.id, true) match { case (diffs, oldCommitId) =>
-                (revision, diffs)
-              }
+              (revision, JGitUtil.getDiffs(git, None, revision.id, true, false))
             }
           }