Fix "kubeconfig_file does not exist" (#20)

This commit fixes "kubeconfig_file does not exist" by changing the
current directory to source dir before running kubectl_setup.

assets/out

@@ -17,7 +17,10 @@ source $(dirname $0)/common.sh
 # Print the last exit code if it isn't 0 when this process exits
 trap 'on_exit' EXIT
 
+# The first argument is a path to the directory containing the build's full set of sources.
 source_dir=$1
+cd $source_dir
+
 payload=$(mktemp $TMPDIR/kubernetes-resource-request.XXXXXX)
 cat > $payload <&0
 
@@ -31,8 +34,6 @@ if [[ -z "$kubectl_command" ]]; then
   exit 1
 fi
 
-cd $source_dir
-
 exe kubectl $(eval "echo $kubectl_command")
 
 # Optional. The number of seconds that waits until all pods are ready. Defaults to `30`.