From d3882914273faad7eedbc08db1a4ba3d6c791c55 Mon Sep 17 00:00:00 2001
From: Cedric Beust <cedric@beust.com>
Date: Tue, 3 Nov 2015 21:03:56 -0800
Subject: [PATCH] Handle ABI changes better.

---
 src/main/kotlin/com/beust/kobalt/Main.kt | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/src/main/kotlin/com/beust/kobalt/Main.kt b/src/main/kotlin/com/beust/kobalt/Main.kt
index 6f5f2d3b..852a391f 100644
--- a/src/main/kotlin/com/beust/kobalt/Main.kt
+++ b/src/main/kotlin/com/beust/kobalt/Main.kt
@@ -120,14 +120,15 @@ private class Main @Inject constructor(
                 try {
                     allProjects = buildFileCompilerFactory.create(listOf(buildFile)).compileBuildFiles(args)
                 } catch(ex: Throwable) {
-                    error("Couldn't build", ex.cause ?: ex)
+                    // This can happen if the ABI for the build script file changed. Try to wipe .kobalt.
                     log(2, "Couldn't parse preBuildScript.jar: ${ex.message}")
-//                    if (! File(".kobalt").deleteRecursively()) {
-//                        warn("Couldn't delete .kobalt, please delete it manually")
-//                    } else {
-//                        log(1, "Deleted .kobalt")
-//                        allProjects = buildFileCompilerFactory.create(listOf(buildFile)).compileBuildFiles(args)
-//                    }
+                    if (! File(".kobalt").deleteRecursively()) {
+                        warn("Couldn't delete the .kobalt directory, please delete it manually and try again")
+                        return 1
+                    } else {
+                        log(1, "Deleted .kobalt")
+                        allProjects = buildFileCompilerFactory.create(listOf(buildFile)).compileBuildFiles(args)
+                    }
                 }
 
                 if (args.tasks) {