* Add assemblyUnzipDirectory to AssemblyOption to use a different dir…

…ectory for unzipping jars

* Add assemblyCacheDependency task to unzip jar dependencies as a separate task

README.md

@@ -393,6 +393,25 @@ lazy val app = (project in file("app"))
   )
 ```
 
+
+### Unzip Caching
+
+When assembling an über artifact, that has many library dependencies, the unzip process can be very IO intensive. These unzipped directories are very suitable for CI systems to persist in between job runs.
+
+```scala
+lazy val app = (project in file("app"))
+  .settings(
+    assemblyUnzipDirectory := Some(localCacheDirectory.value / "sbt-assembly" / "dependencies"),
+    assemblyCacheUnzip := true, // this is the default setting
+    assemblyCacheUseHardLinks := true, // this is experimental but will use a hard link between the files in assemblyUnzipDirectory to assemblyDirectory to avoid additional copy IO
+    // more settings here ...
+  )
+```
+
+To populate the assemblyUnzipDirectory without a full assembly:
+
+    sbt assemblyCacheDependency 
+
 Other Things
 ------------
 

build.sbt

@@ -6,7 +6,7 @@ ThisBuild / crossScalaVersions := Seq(scala212)
 ThisBuild / scalaVersion := scala212
 
 lazy val root = (project in file("."))
-  .enablePlugins(SbtPlugin) // ContrabandPlugin
+  .enablePlugins(SbtPlugin)
   .settings(pomConsistency2021DraftSettings)
   .settings(nocomma {
     name := "sbt-assembly"
@@ -21,7 +21,6 @@ lazy val root = (project in file("."))
         case "2.12" => "1.2.8"
       }
     }
-    Compile / generateContrabands / sourceManaged := baseDirectory.value / "src" / "main" / "contraband-scala"
   })
 
 ThisBuild / scmInfo := Some(