Subject: [PATCH 3/4] inferior: Add a shared-directory field to <inferior>

From: Christopher Baines <[email-masked]>
Date: Sun, 24 Feb 2019 16:18:54 +0000

---
 guix/inferior.scm | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/guix/inferior.scm b/guix/inferior.scm
index 027418a98d..cf72454426 100644
--- a/guix/inferior.scm
+++ b/guix/inferior.scm
@@ -97,14 +97,15 @@
 
 ;; Inferior Guix process.
 (define-record-type <inferior>
-  (inferior pid socket close version packages table)
+  (inferior pid socket close shared-directory version packages table)
   inferior?
-  (pid      inferior-pid)
-  (socket   inferior-socket)
-  (close    inferior-close-socket)               ;procedure
-  (version  inferior-version)                    ;REPL protocol version
-  (packages inferior-package-promise)            ;promise of inferior packages
-  (table    inferior-package-table))             ;promise of vhash
+  (pid              inferior-pid)
+  (socket           inferior-socket)
+  (close            inferior-close-socket)       ;procedure
+  (shared-directory inferior-shared-directory)
+  (version          inferior-version)            ;REPL protocol version
+  (packages         inferior-package-promise)    ;promise of inferior packages
+  (table            inferior-package-table))     ;promise of vhash
 
 (define (inferior-pipe directory command)
   "Return an input/output pipe on the Guix instance in DIRECTORY.  This runs
@@ -136,7 +137,7 @@ it's an old Guix."
                           ((@ (guix scripts repl) machine-repl))))))
         pipe)))
 
-(define* (port->inferior pipe #:optional (close close-port))
+(define* (port->inferior pipe shared-directory #:optional (close close-port))
   "Given PIPE, an input/output port, return an inferior that talks over PIPE.
 PIPE is closed with CLOSE when 'close-inferior' is called on the returned
 inferior."
@@ -144,7 +145,8 @@ inferior."
 
   (match (read pipe)
     (('repl-version 0 rest ...)
-     (letrec ((result (inferior 'pipe pipe close (cons 0 rest)
+     (letrec ((result (inferior 'pipe pipe close shared-directory
+                                (cons 0 rest)
                                 (delay (%inferior-packages result))
                                 (delay (%inferior-package-table result)))))
        (inferior-eval '(use-modules (guix)) result)
@@ -162,7 +164,7 @@ equivalent.  Return #f if the inferior could not be launched."
   (define pipe
     (inferior-pipe directory command))
 
-  (port->inferior pipe close-pipe))
+  (port->inferior pipe #f close-pipe))
 
 (define (close-inferior inferior)
   "Close INFERIOR."
@@ -479,7 +481,8 @@ thus be the code of a one-argument procedure that accepts a store."
          ((client . address)
           (proxy client (store-connection-socket store))))
        (close-port socket)
-       (read-inferior-response inferior)))))
+       (read-inferior-response inferior)))
+   #:base-directory (inferior-shared-directory inferior)))
 
 (define* (inferior-package-derivation store package
                                       #:optional
-- 
2.20.1