make banner configurable from CLI, add link to patreon page, 0.8.4

amm/src/main/scala/ammonite/Main.scala

@@ -151,13 +151,19 @@ object Main{
       // Primary arguments that correspond to the arguments of
       // the `Main` configuration object
       head("ammonite", ammonite.Constants.version)
+
       opt[String]('p', "predef")
         .action((x, c) => c.copy(predef = x))
         .text("Any commands you want to execute at the start of the REPL session")
+
       opt[Unit]("no-default-predef")
         .action((x, c) => c.copy(defaultPredef = false))
         .text("Disable the default predef and run Ammonite with the minimal predef possible")
 
+      opt[String]('b', "banner")
+        .action((x, c) => c.copy(welcomeBanner = Some(x)))
+        .text("Customize the welcome banner that gets shown when Ammonite starts")
+
       // Secondary arguments that correspond to different methods of
       // the `Main` configuration arguments
       arg[String]("<file-args>...")
@@ -245,6 +251,7 @@ object Main{
               }
           }
         },
+        welcomeBanner = c.welcomeBanner,
         verboseOutput = verboseOutput
       )
       (fileToExecute, codeToExecute) match {

amm/src/main/scala/ammonite/main/Defaults.scala

@@ -14,7 +14,8 @@ object Defaults{
     def javaVersion = System.getProperty("java.version")
     Util.normalizeNewlines(
       s"""Welcome to the Ammonite Repl $ammoniteVersion
-          |(Scala $scalaVersion Java $javaVersion)""".stripMargin
+          |(Scala $scalaVersion Java $javaVersion)
+          |If you like Ammonite, please support our development at www.patreon.com/lihaoyi""".stripMargin
     )
   }
   val ignoreUselessImports = """

readme/Footer.scalatex

@@ -114,6 +114,11 @@
 
 
   @sect{Changelog}
+    @sect{0.8.4}
+      @ul
+        @li
+          Make startup banner configurable via a command line flag
+
     @sect{0.8.3}
       @ul
         @li