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1.0.11.1: Handle set-but-empty environment variables
[sbcl.git]
/
contrib
/
asdf-install
/
installer.lisp
diff --git
a/contrib/asdf-install/installer.lisp
b/contrib/asdf-install/installer.lisp
index
0af1455
..
b43f15a
100644
(file)
--- a/
contrib/asdf-install/installer.lisp
+++ b/
contrib/asdf-install/installer.lisp
@@
-2,8
+2,9
@@
(defvar *proxy* (posix-getenv "http_proxy"))
(defvar *cclan-mirror*
(defvar *proxy* (posix-getenv "http_proxy"))
(defvar *cclan-mirror*
- (or (posix-getenv "CCLAN_MIRROR")
- "http://ftp.linux.org.uk/pub/lisp/cclan/"))
+ (let ((mirror (posix-getenv "CCLAN_MIRROR")))
+ (or (and (not (string= mirror "")) mirror)
+ "http://ftp.linux.org.uk/pub/lisp/cclan/")))
(defun directorify (name)
;; input name may or may not have a training #\/, but we know we
(defun directorify (name)
;; input name may or may not have a training #\/, but we know we