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-rw-r--r--guix/ui.scm19
1 files changed, 19 insertions, 0 deletions
diff --git a/guix/ui.scm b/guix/ui.scm
index fb8121c213..9cc1908e6e 100644
--- a/guix/ui.scm
+++ b/guix/ui.scm
@@ -34,6 +34,7 @@
#:use-module (guix serialization)
#:use-module ((guix build utils) #:select (mkdir-p))
#:use-module ((guix licenses) #:select (license? license-name))
+ #:use-module (gnu system file-systems)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-19)
@@ -80,6 +81,7 @@
string->recutils
package->recutils
package-specification->name+version+output
+ specification->file-system-mapping
string->generations
string->duration
run-guix-command
@@ -966,6 +968,23 @@ optionally contain a version number and an output name, as in these examples:
(package-name->name+version name)))
(values name version sub-drv)))
+(define (specification->file-system-mapping spec writable?)
+ "Read the SPEC and return the corresponding <file-system-mapping>. SPEC is
+a string of the form \"SOURCE\" or \"SOURCE=TARGET\". The former specifies
+that SOURCE from the host should be mounted at SOURCE in the other system.
+The latter format specifies that SOURCE from the host should be mounted at
+TARGET in the other system."
+ (let ((index (string-index spec #\=)))
+ (if index
+ (file-system-mapping
+ (source (substring spec 0 index))
+ (target (substring spec (+ 1 index)))
+ (writable? writable?))
+ (file-system-mapping
+ (source spec)
+ (target spec)
+ (writable? writable?)))))
+
;;;
;;; Command-line option processing.