Source: Adapted from Exherbo's by Bo Ørsted Andresen <zlin@exherbo.org>
Upstream: No.
Reason: Avoid error messages such as:
	bash: BASH_COMPLETION: readonly variable


--- bash_completion	2008-11-23 22:45:42.000000000 +0100
+++ bash_completion	2008-11-23 23:33:01.000000000 +0100
@@ -39,8 +39,13 @@
 
 # Alter the following to reflect the location of this file.
 #
-[ -n "$BASH_COMPLETION" ] || BASH_COMPLETION=/etc/bash_completion
-[ -n "$BASH_COMPLETION_DIR" ] || BASH_COMPLETION_DIR=/etc/bash_completion.d
+# Don't try to redefine readonly variables
+if [[ -z ${BASH_COMPLETION} ]]; then
+  BASH_COMPLETION="${BASH_COMPLETION:-/usr/share/bash-completion/base}"
+fi
+if [[ -z ${BASH_COMPLETION_DIR} ]]; then
+   BASH_COMPLETION_DIR="${BASH_COMPLETION_DIR:=/etc/bash_completion.d}"
+fi
 readonly BASH_COMPLETION BASH_COMPLETION_DIR
 
 # Set a couple of useful vars