From 7c3f8b3041b6d904350563fe4437530db029f583 Mon Sep 17 00:00:00 2001
From: epriestley <git@epriestley.com>
Date: Wed, 21 Mar 2012 18:04:35 -0700
Subject: [PATCH] Resolve arc location through symlinks-of-symlinks, etc

Summary:
Stole this from stackoverflow; seems to work?

http://stackoverflow.com/questions/59895/can-a-bash-script-tell-what-directory-its-stored-in

Test Plan: Ran a symlink to bin/arc.

Reviewers: btrahan, zeeg

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T124

Differential Revision: https://secure.phabricator.com/D1968
---
 bin/arc | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/bin/arc b/bin/arc
index bf49fa39..8ca8af85 100755
--- a/bin/arc
+++ b/bin/arc
@@ -1,7 +1,15 @@
-#!/bin/sh
+#!/bin/bash
 
 # NOTE: This file is a wrapper script instead of a symlink so it will work in
 # the Git Bash environment in Windows.
 
-exec `dirname $0`/../scripts/arcanist.php $@
+# Do bash magic to resolve the real location of this script through aliases,
+# symlinks, etc.
+SOURCE="${BASH_SOURCE[0]}";
+while [ -h "$SOURCE" ]; do
+  SOURCE="$(readlink "$SOURCE")";
+done;
+DIR="$(cd -P "$(dirname "$SOURCE")" && pwd)"
+
+exec $DIR/../scripts/arcanist.php $@