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authorHuang Ying <huang.ying.caritas@gmail.com>2017-03-12 19:53:58 +0800
committerLudovic Courtès <ludo@gnu.org>2017-03-26 12:53:48 +0200
commitaddce19e2d38a197f5ea10eefb5f3cd25c3a52e7 (patch)
tree87f70b53d781a51da36f18f780bfdb586f94d26d /guix/build/union.scm
parent7398d96ee9141768de2a33df94109f7f10637d27 (diff)
union: Add create-all-directories? parameter to 'union-build'.
* guix/build/union.scm (union-build): Add create-all-directories? keyword parameter. * tests/union.scm ("union-build #:create-all-directories? #t"): New test. Co-authored-by: Ludovic Courtès <ludo@gnu.org>
Diffstat (limited to 'guix/build/union.scm')
-rw-r--r--guix/build/union.scm17
1 files changed, 12 insertions, 5 deletions
diff --git a/guix/build/union.scm b/guix/build/union.scm
index 6640b56523..a2ea72e1f5 100644
--- a/guix/build/union.scm
+++ b/guix/build/union.scm
@@ -1,6 +1,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2016 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2014 Mark H Weaver <mhw@netris.org>
+;;; Copyright © 2017 Huang Ying <huang.ying.caritas@gmail.com>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -73,9 +74,12 @@ identical, #f otherwise."
(loop)))))))))))))
(define* (union-build output inputs
- #:key (log-port (current-error-port)))
- "Build in the OUTPUT directory a symlink tree that is the union of all
-the INPUTS."
+ #:key (log-port (current-error-port))
+ (create-all-directories? #f))
+ "Build in the OUTPUT directory a symlink tree that is the union of all the
+INPUTS. As a special case, if CREATE-ALL-DIRECTORIES?, creates the
+subdirectories in the output directory to make sure the caller can modify them
+later."
(define (symlink* input output)
(format log-port "`~a' ~~> `~a'~%" input output)
@@ -104,8 +108,11 @@ the INPUTS."
(define (union output inputs)
(match inputs
((input)
- ;; There's only one input, so just make a link.
- (symlink* input output))
+ ;; There's only one input, so just make a link unless
+ ;; create-all-directories?.
+ (if (and create-all-directories? (file-is-directory? input))
+ (union-of-directories output inputs)
+ (symlink* input output)))
(_
(call-with-values (lambda () (partition file-is-directory? inputs))
(match-lambda*