monads: Move '%store-monad' and related procedures where they belong.

This turns (guix monads) into a generic module for monads, and moves the
store monad and related monadic procedures in their corresponding
module.

* guix/monads.scm (store-return, store-bind, %store-monad, store-lift,
  text-file, interned-file, package-file, package->derivation,
  package->cross-derivation, origin->derivation, imported-modules,
  compiled, modules, built-derivations, run-with-store): Move to...
* guix/store.scm (store-return, store-bind, %store-monad, store-lift,
  text-file, interned-file): ... here.
  (%guile-for-build): New variable.
  (run-with-store): Moved from monads.scm.  Remove default value for
  #:guile-for-build.
* guix/packages.scm (default-guile): Export.
  (set-guile-for-build): New procedure.
  (package-file, package->derivation, package->cross-derivation,
  origin->derivation): Moved from monads.scm.
* guix/derivations.scm (%guile-for-build): Remove.
  (imported-modules): Rename to...
  (%imported-modules): ... this.
  (compiled-modules): Rename to...
  (%compiled-modules): ... this.
  (built-derivations, imported-modules, compiled-modules): New
  procedures.
* gnu/services/avahi.scm, gnu/services/base.scm, gnu/services/dbus.scm,
  gnu/services/dmd.scm, gnu/services/networking.scm,
  gnu/services/ssh.scm, gnu/services/xorg.scm, gnu/system/install.scm,
  gnu/system/linux-initrd.scm, gnu/system/shadow.scm, guix/download.scm,
  guix/gexp.scm, guix/git-download.scm, guix/profiles.scm,
  guix/svn-download.scm, tests/monads.scm: Adjust imports accordingly.
* guix/monad-repl.scm (default-guile-derivation): New procedure.
  (store-monad-language, run-in-store): Use it.
* build-aux/hydra/gnu-system.scm (qemu-jobs): Add explicit
  'set-guile-for-build' call.
* guix/scripts/archive.scm (derivation-from-expression): Likewise.
* guix/scripts/build.scm (options/resolve-packages): Likewise.
* guix/scripts/environment.scm (guix-environment): Likewise.
* guix/scripts/system.scm (guix-system): Likewise.
* doc/guix.texi (The Store Monad): Adjust module names accordingly.

1 files changed, 19 insertions, 7 deletions

diff --git a/guix/monad-repl.scm b/guix/monad-repl.scm
index 5242f5448b..ebd9151065 100644
--- a/guix/monad-repl.scm
+++ b/guix/monad-repl.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2014, 2015 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -19,6 +19,8 @@
 (define-module (guix monad-repl)
   #:use-module (guix store)
   #:use-module (guix monads)
+  #:use-module (guix utils)
+  #:use-module (guix packages)
   #:use-module (ice-9 pretty-print)
   #:use-module (system repl repl)
   #:use-module (system repl common)
@@ -54,20 +56,30 @@
                    #:make-default-environment
                    (language-make-default-environment scheme))))
 
+(define* (default-guile-derivation store #:optional (system (%current-system)))
+  "Return the derivation of the default "
+  (package-derivation store (default-guile) system))
+
 (define (store-monad-language)
   "Return a compiler language for the store monad."
-  (let ((store (open-connection)))
+  (let* ((store (open-connection))
+         (guile (or (%guile-for-build)
+                    (default-guile-derivation store))))
     (monad-language %store-monad
-                    (cut run-with-store store <>)
+                    (cut run-with-store store <>
+                         #:guile-for-build guile)
                     'store-monad)))
 
 (define-meta-command ((run-in-store guix) repl (form))
   "run-in-store EXP
 Run EXP through the store monad."
-  (let ((value (with-store store
-                 (run-with-store store (repl-eval repl form)))))
-    (run-hook before-print-hook value)
-    (pretty-print value)))
+  (with-store store
+    (let* ((guile (or (%guile-for-build)
+                      (default-guile-derivation store)))
+           (value (run-with-store store (repl-eval repl form)
+                                  #:guile-for-build guile)))
+      (run-hook before-print-hook value)
+      (pretty-print value))))
 
 (define-meta-command ((enter-store-monad guix) repl)
   "enter-store-monad