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authorLudovic Courtès <ludo@gnu.org>2018-11-26 11:48:33 +0100
committerLudovic Courtès <ludo@gnu.org>2018-11-28 10:39:58 +0100
commit94c0e61fe759924625c9e27d3da8c7c0c767ea2b (patch)
treea40bc5de2f9e71a83532545367f2ecd153b1af2a /guix/inferior.scm
parentd4aa147eecc64a00d1463d4008b22c9595041552 (diff)
inferior: Add 'inferior-eval-with-store'.
* guix/inferior.scm (inferior-eval-with-store): New procedure, with code formerly in 'inferior-package-derivation'. (inferior-package-derivation): Rewrite in terms of 'inferior-eval-with-store'. * tests/inferior.scm ("inferior-eval-with-store"): New test.
Diffstat (limited to 'guix/inferior.scm')
-rw-r--r--guix/inferior.scm70
1 files changed, 43 insertions, 27 deletions
diff --git a/guix/inferior.scm b/guix/inferior.scm
index 1dbb9e1699..ccc1c27cb2 100644
--- a/guix/inferior.scm
+++ b/guix/inferior.scm
@@ -56,6 +56,7 @@
open-inferior
close-inferior
inferior-eval
+ inferior-eval-with-store
inferior-object?
inferior-packages
@@ -402,55 +403,70 @@ input/output ports.)"
(unless (port-closed? client)
(loop))))))
-(define* (inferior-package-derivation store package
- #:optional
- (system (%current-system))
- #:key target)
- "Return the derivation for PACKAGE, an inferior package, built for SYSTEM
-and cross-built for TARGET if TARGET is true. The inferior corresponding to
-PACKAGE must be live."
- ;; Create a named socket in /tmp and let the inferior of PACKAGE connect to
- ;; it and use it as its store. This ensures the inferior uses the same
- ;; store, with the same options, the same per-session GC roots, etc.
+(define (inferior-eval-with-store inferior store code)
+ "Evaluate CODE in INFERIOR, passing it STORE as its argument. CODE must
+thus be the code of a one-argument procedure that accepts a store."
+ ;; Create a named socket in /tmp and let INFERIOR connect to it and use it
+ ;; as its store. This ensures the inferior uses the same store, with the
+ ;; same options, the same per-session GC roots, etc.
(call-with-temporary-directory
(lambda (directory)
(chmod directory #o700)
(let* ((name (string-append directory "/inferior"))
(socket (socket AF_UNIX SOCK_STREAM 0))
- (inferior (inferior-package-inferior package))
(major (nix-server-major-version store))
(minor (nix-server-minor-version store))
(proto (logior major minor)))
(bind socket AF_UNIX name)
(listen socket 1024)
(send-inferior-request
- `(let ((socket (socket AF_UNIX SOCK_STREAM 0)))
+ `(let ((proc ,code)
+ (socket (socket AF_UNIX SOCK_STREAM 0)))
(connect socket AF_UNIX ,name)
;; 'port->connection' appeared in June 2018 and we can hardly
;; emulate it on older versions. Thus fall back to
;; 'open-connection', at the risk of talking to the wrong daemon or
;; having our build result reclaimed (XXX).
- (let* ((store (if (defined? 'port->connection)
- (port->connection socket #:version ,proto)
- (open-connection)))
- (package (hashv-ref %package-table
- ,(inferior-package-id package)))
- (drv ,(if target
- `(package-cross-derivation store package
- ,target
- ,system)
- `(package-derivation store package
- ,system))))
- (close-connection store)
- (close-port socket)
- (derivation-file-name drv)))
+ (let ((store (if (defined? 'port->connection)
+ (port->connection socket #:version ,proto)
+ (open-connection))))
+ (dynamic-wind
+ (const #t)
+ (lambda ()
+ (proc store))
+ (lambda ()
+ (close-connection store)
+ (close-port socket)))))
inferior)
(match (accept socket)
((client . address)
(proxy client (nix-server-socket store))))
(close-port socket)
- (read-derivation-from-file (read-inferior-response inferior))))))
+ (read-inferior-response inferior)))))
+
+(define* (inferior-package-derivation store package
+ #:optional
+ (system (%current-system))
+ #:key target)
+ "Return the derivation for PACKAGE, an inferior package, built for SYSTEM
+and cross-built for TARGET if TARGET is true. The inferior corresponding to
+PACKAGE must be live."
+ (define proc
+ `(lambda (store)
+ (let* ((package (hashv-ref %package-table
+ ,(inferior-package-id package)))
+ (drv ,(if target
+ `(package-cross-derivation store package
+ ,target
+ ,system)
+ `(package-derivation store package
+ ,system))))
+ (derivation-file-name drv))))
+
+ (and=> (inferior-eval-with-store (inferior-package-inferior package) store
+ proc)
+ read-derivation-from-file))
(define inferior-package->derivation
(store-lift inferior-package-derivation))