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authorLudovic Courtès <ludo@gnu.org>2019-01-12 18:19:13 +0100
committerLudovic Courtès <ludo@gnu.org>2019-01-15 20:24:09 +0100
commitae927822409b220e0e9a006df5912c617973c736 (patch)
tree9d73d3d59311df02b409f3b084cbd0fde9f4becb
parente2a903c807ccacec5925f197ce26f626060e1953 (diff)
downloadpatches-ae927822409b220e0e9a006df5912c617973c736.tar
patches-ae927822409b220e0e9a006df5912c617973c736.tar.gz
inferior: Add 'gexp->derivation-in-inferior'.
* guix/inferior.scm (gexp->derivation-in-inferior): New procedure.
-rw-r--r--guix/inferior.scm26
1 files changed, 26 insertions, 0 deletions
diff --git a/guix/inferior.scm b/guix/inferior.scm
index ba8d00866b..4dfb242e44 100644
--- a/guix/inferior.scm
+++ b/guix/inferior.scm
@@ -81,6 +81,8 @@
inferior-package->manifest-entry
+ gexp->derivation-in-inferior
+
%inferior-cache-directory
inferior-for-channels))
@@ -484,6 +486,30 @@ PACKAGE must be live."
;; Compile PACKAGE for SYSTEM, optionally cross-building for TARGET.
(inferior-package->derivation package system #:target target))
+(define* (gexp->derivation-in-inferior name exp guix
+ #:rest rest)
+ "Return a derivation that evaluates EXP with GUIX, an instance of Guix as
+returned for example by 'channel-instances->derivation'. Other arguments are
+passed as-is to 'gexp->derivation'."
+ (define trampoline
+ ;; This is a crude way to run EXP on GUIX. TODO: use 'raw-derivation' and
+ ;; make 'guix repl' the "builder"; this will require "opening up" the
+ ;; mechanisms behind 'gexp->derivation', and adding '-l' to 'guix repl'.
+ #~(begin
+ (use-modules (ice-9 popen))
+
+ (let ((pipe (open-pipe* OPEN_WRITE
+ #+(file-append guix "/bin/guix")
+ "repl" "-t" "machine")))
+ ;; Unquote EXP right here so that its references to #$output
+ ;; propagate to the surrounding gexp.
+ (write '#$exp pipe) ;XXX: load path for EXP?
+
+ (unless (zero? (close-pipe pipe))
+ (error "inferior failed" #+guix)))))
+
+ (apply gexp->derivation name trampoline rest))
+
;;;
;;; Manifest entries.