From 40f2105070a8cec11b480357aa1332e540066987 Mon Sep 17 00:00:00 2001
From: Bart Schuller <schuller@lunatech.com>
Date: Thu, 6 Sep 2012 19:11:12 +0200
Subject: [PATCH] Use realpath to locate relative files, add sh impl

because Mac OSX doesn't have a realpath binary.

This solves the issue where if you symlink to sbt, it
won't be able to locate the bash library and launcher anymore.

You'd want to do that so you can symlink just sbt to /usr/local/bin
without having to put a bash library file there as well.
In particular, this is what we'd like for Mac homebrew.
---
 project/packaging.scala |  2 +-
 src/scripts/sbt         | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/project/packaging.scala b/project/packaging.scala
index 1018e7ac2..5d0150daf 100644
--- a/project/packaging.scala
+++ b/project/packaging.scala
@@ -49,7 +49,7 @@ object Packaging {
     fixedLinuxScriptDir <<= target / "linux-scripts",
     fixedUniversalScriptDir <<= target / "universal-scripts",
     linuxFixedScripts <<= (fixedScriptDir, fixedLinuxScriptDir) map fixScripts("/usr/lib/sbt/sbt-launch.jar", "/usr/share/sbt/sbt-launch-lib.bash"),
-    universalFixedScripts <<= (fixedScriptDir, fixedUniversalScriptDir) map fixScripts("\\$(dirname \\$0)/sbt-launch.jar", "\\$(dirname \\$0)/sbt-launch-lib.bash"),
+    universalFixedScripts <<= (fixedScriptDir, fixedUniversalScriptDir) map fixScripts("\\$(dirname \\$(realpath \\$0))/sbt-launch.jar", "\\$(dirname \\$(realpath \\$0))/sbt-launch-lib.bash"),
     sbtLaunchJarUrl <<= sbtVersion apply downloadUrlForVersion,
     sbtLaunchJarLocation <<= target apply (_ / "sbt-launch.jar"),
     sbtLaunchJar <<= (sbtLaunchJarUrl, sbtLaunchJarLocation) map { (uri, file) =>
diff --git a/src/scripts/sbt b/src/scripts/sbt
index 8e50f8f03..ea674f6a4 100755
--- a/src/scripts/sbt
+++ b/src/scripts/sbt
@@ -1,5 +1,25 @@
 #!/usr/bin/env bash
 
+realpath () {
+(
+  TARGET_FILE=$1
+
+  cd $(dirname $TARGET_FILE)
+  TARGET_FILE=$(basename $TARGET_FILE)
+
+  COUNT=0
+  while [ -L "$TARGET_FILE" -a $COUNT -lt 100 ]
+  do
+      TARGET_FILE=$(readlink $TARGET_FILE)
+      cd $(dirname $TARGET_FILE)
+      TARGET_FILE=$(basename $TARGET_FILE)
+      COUNT=$(($COUNT + 1))
+  done
+
+  echo $(pwd -P)/$TARGET_FILE
+)
+}
+
 . @@BASH-LIB-LOCATION@@