From 1cf7e31898ba444c7c1614aa5d5680806b60442a Mon Sep 17 00:00:00 2001
From: Ludovic Courtès <ludo@gnu.org>
Date: Wed, 16 Mar 2016 14:51:37 +0100
Subject: substitute: Make room for a 'ttl' field in cached entries.

* guix/scripts/substitute.scm (cached-narinfo): Expect 'narinfo' sexp
version 2 with a 'ttl' field.
(cache-narinfo!)[cache-entry]: Produce 'narinfo' sexp version 2 with a
'ttl' field.
(remove-expired-cached-narinfos)[expired?]: Read 'narinfo' sexp version 2.
---
 guix/scripts/substitute.scm | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

(limited to 'guix/scripts/substitute.scm')

diff --git a/guix/scripts/substitute.scm b/guix/scripts/substitute.scm
index 524d453ffa..4b009d8c81 100755
--- a/guix/scripts/substitute.scm
+++ b/guix/scripts/substitute.scm
@@ -452,18 +452,18 @@ (define cache-file
       (call-with-input-file cache-file
         (lambda (p)
           (match (read p)
-            (('narinfo ('version 1)
+            (('narinfo ('version 2)
                        ('cache-uri cache-uri)
-                       ('date date) ('value #f))
+                       ('date date) ('ttl _) ('value #f))
              ;; A cached negative lookup.
              (if (obsolete? date now %narinfo-negative-ttl)
                  (values #f #f)
                  (values #t #f)))
-            (('narinfo ('version 1)
+            (('narinfo ('version 2)
                        ('cache-uri cache-uri)
-                       ('date date) ('value value))
+                       ('date date) ('ttl ttl) ('value value))
              ;; A cached positive lookup
-             (if (obsolete? date now %narinfo-ttl)
+             (if (obsolete? date now ttl)
                  (values #f #f)
                  (values #t (string->narinfo value cache-uri))))
             (('narinfo ('version v) _ ...)
@@ -478,9 +478,10 @@ (define now
     (current-time time-monotonic))
 
   (define (cache-entry cache-uri narinfo)
-    `(narinfo (version 1)
+    `(narinfo (version 2)
               (cache-uri ,cache-uri)
               (date ,(time-second now))
+              (ttl ,%narinfo-ttl)                 ;TODO: Make this per-entry.
               (value ,(and=> narinfo narinfo->string))))
 
   (let ((file (narinfo-cache-file cache-url path)))
@@ -704,12 +705,12 @@ (define (expired? file)
         (call-with-input-file file
           (lambda (port)
             (match (read port)
-              (('narinfo ('version 1) ('cache-uri _) ('date date)
-                         ('value #f))
+              (('narinfo ('version 2) ('cache-uri _)
+                         ('date date) ('ttl _) ('value #f))
                (obsolete? date now %narinfo-negative-ttl))
-              (('narinfo ('version 1) ('cache-uri _) ('date date)
-                         ('value _))
-               (obsolete? date now %narinfo-ttl))
+              (('narinfo ('version 2) ('cache-uri _)
+                         ('date date) ('ttl ttl) ('value _))
+               (obsolete? date now ttl))
               (_ #t)))))
       (lambda args
         ;; FILE may have been deleted.
-- 
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