From 4d2867aa88b5ae02ef34a505794c650038fd3591 Mon Sep 17 00:00:00 2001
From: Ben Soares <b.soares@dundee.ac.uk>
Date: Wed, 13 Nov 2019 22:52:42 +0000
Subject: [PATCH] JAL-3210 task jalviewjsIDE_checkJ2sPlugin compares installed
 net.sf.j2s.core with version in eclipse being run

---
 build.gradle |   43 +++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 41 insertions(+), 2 deletions(-)

diff --git a/build.gradle b/build.gradle
index 21a4c81..3cf725a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,6 +2,7 @@ import org.apache.tools.ant.filters.ReplaceTokens
 import org.gradle.internal.os.OperatingSystem
 import org.gradle.plugins.ide.eclipse.model.Output
 import org.gradle.plugins.ide.eclipse.model.Library
+import java.security.MessageDigest
 
 import groovy.transform.ExternalizeMethods
 
@@ -82,10 +83,11 @@ ext {
   } else {
     println("HEADLESS BUILD")
   }
-  /*
+  /* *-/
   System.properties.sort { it.key }.each {
     key, val -> println("SYSTEM PROPERTY ${key}='${val}'")
   }
+  /-* *-/
   if (false && IN_ECLIPSE) {
     jalviewDir = jalviewDirAbsolutePath
   }
@@ -702,7 +704,7 @@ task convertBuildingMD(type: Exec) {
         commandLine pandoc, '-s', '-o', buildingHTML, '--metadata', 'pagetitle="Building Jalview from Source"', '--toc', '-H', css, buildingMD
     } else {
         println("Cannot find pandoc. Skipping convert building.md to HTML")
-        throw new StopExecutionException()
+        throw new StopExecutionException("Cannot find pandoc. Skipping convert building.md to HTML")
     }
   }
 
@@ -2255,6 +2257,43 @@ task cleanJalviewjsAll {
 }
 
 
+task jalviewjsIDE_checkJ2sPlugin {
+  group "00 JalviewJS in Eclipse"
+  description "Compare the swingjs/net.sf.j2s.core.jar file with the Eclipse pluing version"
+
+  doFirst {
+    def j2sPlugin = string("${jalviewDir}/${jalviewjs_j2s_plugin}")
+    def j2sPluginFile = file(j2sPlugin)
+    def eclipseHome = System.properties["eclipse.home.location"]
+    if (eclipseHome == null || ! IN_ECLIPSE) {
+      throw new StopExecutionException("Cannot find running Eclipse home from System.properties['eclipse.home.location']. Skipping J2S Plugin Check.")
+    }
+    def eclipseJ2sPlugin = "${eclipseHome}/dropins/${j2sPluginFile.getName()}"
+    def eclipseJ2sPluginFile = file(eclipseJ2sPlugin)
+    if (!eclipseJ2sPluginFile.exists()) {
+      def msg = "Eclipse J2S Plugin is not installed"
+      println(msg)
+      throw new GradleException(msg)
+    }
+
+    def digest = MessageDigest.getInstance("MD5")
+
+    digest.update(j2sPluginFile.text.bytes)
+    def j2sPluginMd5 = new BigInteger(1, digest.digest()).toString(16).padLeft(32, '0')
+
+    digest.update(eclipseJ2sPluginFile.text.bytes)
+    def eclipseJ2sPluginMd5 = new BigInteger(1, digest.digest()).toString(16).padLeft(32, '0')
+     
+    if (j2sPluginMd5 != eclipseJ2sPluginMd5) {
+      def msg = "Eclipse J2S Plugin is different to '${j2sPlugin}'"
+      println(msg)
+      throw new GradleException(msg)
+    }
+
+    println("Eclipse J2S Plugin is same as '${j2sPlugin}'")
+  }
+}
+
 
 task jalviewjsIDE_j2sFile {
   group "00 JalviewJS in Eclipse"
-- 
1.7.10.2