From 40b5af925b8b00d2bd383358a4aa013c3367abc9 Mon Sep 17 00:00:00 2001
From: David C Wang <dcwangmit01@gmail.com>
Date: Wed, 1 Mar 2017 21:56:51 +0000
Subject: [PATCH] Enable pi-gen build when "pi-gen/work" dir is a symlink

* Occasionally, it is necessary to symbolically link the pi-gen/work
  directory to a different place on the filesystem.  This is true if
  the current partition is low on space, or when building within
  vagrant virtual machine shared mounts which do not support all
  regular fs operations.
* Without this change, the pi-gen build will fail to unmount because
  the OS 'mount' command returns canonical paths which fails to match
  the symbolically linked path to 'work' dir.
---
 build.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build.sh b/build.sh
index 2656be8..72c566d 100755
--- a/build.sh
+++ b/build.sh
@@ -132,7 +132,7 @@ export IMG_DATE=${IMG_DATE:-"$(date -u +%Y-%m-%d)"}
 
 export BASE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 export SCRIPT_DIR="${BASE_DIR}/scripts"
-export WORK_DIR="${BASE_DIR}/work/${IMG_DATE}-${IMG_NAME}"
+export WORK_DIR=`readlink -f "${BASE_DIR}/work/${IMG_DATE}-${IMG_NAME}"`
 export DEPLOY_DIR="${BASE_DIR}/deploy"
 export LOG_FILE="${WORK_DIR}/build.log"