Split out querying of build servers and substitute servers

These are related things, but somewhat separate. This change should make it
easier to deal with changes regarding querying build servers, and querying
substitute servers.

6 files changed, 159 insertions, 27 deletions

diff --git a/.gitignore b/.gitignore
index 9023cd9..16ff619 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,7 @@ scripts/guix-data-service
 scripts/guix-data-service-process-job
 scripts/guix-data-service-process-jobs
 scripts/guix-data-service-query-build-servers
+scripts/guix-data-service-query-substitute-servers
 scripts/guix-data-service-manage-build-servers
 scripts/guix-data-service-process-branch-updated-email
 scripts/guix-data-service-process-branch-updated-mbox
diff --git a/Makefile.am b/Makefile.am
index dbb32c6..1545dbb 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -28,6 +28,7 @@ bin_SCRIPTS =							\
   scripts/guix-data-service-process-branch-updated-mbox	\
   scripts/guix-data-service-manage-build-servers		\
   scripts/guix-data-service-query-build-servers		\
+  scripts/guix-data-service-query-substitute-servers		\
   scripts/guix-data-service-backup-database			\
   scripts/guix-data-service-create-small-backup
 
@@ -72,6 +73,7 @@ SOURCES =									\
   guix-data-service/comparison.scm						\
   guix-data-service/config.scm							\
   guix-data-service/database.scm						\
+  guix-data-service/substitutes.scm						\
   guix-data-service/utils.scm							\
   guix-data-service/data-deletion.scm						\
   guix-data-service/jobs.scm							\
diff --git a/configure.ac b/configure.ac
index 19a31dd..b7b3aff 100644
--- a/configure.ac
+++ b/configure.ac
@@ -50,6 +50,7 @@ AC_CONFIG_FILES([scripts/guix-data-service-process-branch-updated-email], [chmod
 AC_CONFIG_FILES([scripts/guix-data-service-process-branch-updated-mbox], [chmod +x scripts/guix-data-service-process-branch-updated-mbox])
 AC_CONFIG_FILES([scripts/guix-data-service-manage-build-servers], [chmod +x scripts/guix-data-service-manage-build-servers])
 AC_CONFIG_FILES([scripts/guix-data-service-query-build-servers], [chmod +x scripts/guix-data-service-query-build-servers])
+AC_CONFIG_FILES([scripts/guix-data-service-query-substitute-servers], [chmod +x scripts/guix-data-service-query-substitute-servers])
 AC_CONFIG_FILES([test-env:build-aux/test-env.in], [chmod +x test-env])
 AC_CONFIG_FILES([pre-inst-env], [chmod +x pre-inst-env])
 
diff --git a/guix-data-service/builds.scm b/guix-data-service/builds.scm
index bba5bb3..3182a07 100644
--- a/guix-data-service/builds.scm
+++ b/guix-data-service/builds.scm
@@ -172,8 +172,6 @@ WHERE derivation_output_details.path = $1"
 
   (simple-format #t "\nFetching pending builds\n")
   (process-pending-builds conn id url)
-  (simple-format #t "\nFetching narinfo files\n")
-  (fetch-narinfo-files conn id url revision-commits)
   (simple-format #t "\nFetching unseen derivations\n")
   (process-derivation-outputs
    conn id url
@@ -617,28 +615,3 @@ LIMIT 30000"))
                          result))))
         vlist-null
         (exec-query conn query (list (number->string build-server-id)))))
-
-(define (fetch-narinfo-files conn build-server-id build-server-url revision-commits)
-  (define outputs
-    (select-outputs-without-known-nar-entries
-     conn
-     build-server-id
-     revision-commits))
-
-  (simple-format #t "Querying ~A outputs\n"
-                 (length outputs))
-
-  (let ((narinfos
-         (lookup-narinfos (string-trim-right build-server-url #\/) outputs)))
-
-    (simple-format #t "Got ~A narinfo files\n"
-                   (length narinfos))
-
-    (unless (eq? (length narinfos) 0)
-      (with-postgresql-transaction
-       conn
-       (lambda (conn)
-         (record-narinfo-details-and-return-ids
-          conn
-          build-server-id
-          narinfos))))))
diff --git a/guix-data-service/substitutes.scm b/guix-data-service/substitutes.scm
new file mode 100644
index 0000000..6dd069e
--- /dev/null
+++ b/guix-data-service/substitutes.scm
@@ -0,0 +1,83 @@
+;;; Guix Data Service -- Information about Guix over time
+;;; Copyright © 2019, 2020 Christopher Baines <mail@cbaines.net>
+;;;
+;;; This program is free software: you can redistribute it and/or
+;;; modify it under the terms of the GNU Affero General Public License
+;;; as published by the Free Software Foundation, either version 3 of
+;;; the License, or (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; Affero General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Affero General Public
+;;; License along with this program.  If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+(define-module (guix-data-service substitutes)
+  #:use-module (ice-9 match)
+  #:use-module (guix scripts substitute)
+  #:use-module (guix-data-service database)
+  #:use-module (guix-data-service model build-server)
+  #:use-module (guix-data-service model nar)
+  #:export (query-build-server-substitutes))
+
+(define verbose-output?
+  (make-parameter #f))
+
+(define* (query-build-server-substitutes conn build-server-ids revision-commits
+                                         outputs
+                                         #:key verbose?)
+  (parameterize
+      ((verbose-output? verbose?))
+    (while #t
+      (let ((build-servers (select-build-servers conn)))
+        (for-each
+         (match-lambda
+           ((id url lookup-all-derivations?)
+            (when (or (or (not build-servers)
+                          (not build-server-ids))
+                      (member id build-server-ids))
+              (when lookup-all-derivations?
+                (simple-format #t "\nQuerying ~A\n" url)
+                (catch #t
+                  (lambda ()
+                    (simple-format #t "\nFetching narinfo files\n")
+                    (fetch-narinfo-files conn id url revision-commits
+                                         #:specific-outputs
+                                         outputs))
+                  (lambda (key . args)
+                    (simple-format
+                     (current-error-port)
+                     "exception in query-build-server: ~A ~A\n"
+                     key args)))))))
+         build-servers)))))
+
+(define* (fetch-narinfo-files conn build-server-id build-server-url
+                              revision-commits
+                              #:key specific-outputs)
+  (define outputs
+    (or specific-outputs
+        (select-outputs-without-known-nar-entries
+         conn
+         build-server-id
+         revision-commits)))
+
+  (simple-format #t "Querying ~A outputs\n"
+                 (length outputs))
+
+  (let ((narinfos
+         (lookup-narinfos (string-trim-right build-server-url #\/) outputs)))
+
+    (simple-format #t "Got ~A narinfo files\n"
+                   (length narinfos))
+
+    (unless (eq? (length narinfos) 0)
+      (with-postgresql-transaction
+       conn
+       (lambda (conn)
+         (record-narinfo-details-and-return-ids
+          conn
+          build-server-id
+          narinfos))))))
diff --git a/scripts/guix-data-service-query-substitute-servers.in b/scripts/guix-data-service-query-substitute-servers.in
new file mode 100644
index 0000000..2ae87ac
--- /dev/null
+++ b/scripts/guix-data-service-query-substitute-servers.in
@@ -0,0 +1,72 @@
+#!@GUILE@ --no-auto-compile
+-*- scheme -*-
+-*- geiser-scheme-implementation: guile -*-
+!#
+;;; Guix Data Service -- Information about Guix over time
+;;; Copyright © 2019, 2020 Christopher Baines <mail@cbaines.net>
+;;;
+;;; This file is part of guix-data-service.
+;;;
+;;; guix-data-service is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; guix-data-service is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with the guix-data-service.  If not, see <http://www.gnu.org/licenses/>.
+
+(use-modules (srfi srfi-1)
+             (srfi srfi-37)
+             (squee)
+             (guix-data-service database)
+             (guix-data-service substitutes))
+
+(define %options
+  ;; Specifications of the command-line options
+  (list (option '("build-server-id") #t #f
+                (lambda (opt name arg result)
+                  (alist-cons
+                   'build-server-ids
+                   (cons (string->number arg)
+                         (or (assoc-ref result 'build-server-ids)
+                             '()))
+                   (alist-delete 'build-server-ids result))))
+        (option '("verbose") #f #f
+                (lambda (opt name _ result)
+                  (alist-cons 'verbose #t result)))))
+
+(define %default-options
+  ;; Alist of default option values
+  '((revision-commits . ())))
+
+(define (parse-options args)
+  (args-fold
+   args %options
+   (lambda (opt name arg result)
+     (error "unrecognized option" name))
+   (lambda (arg result)
+     (let ((type (if (string-prefix? "/gnu/store/" arg)
+                     'outputs
+                     'revision-commits)))
+       (alist-cons
+        type
+        (cons arg
+              (or (assoc-ref result type)
+                  '()))
+        (alist-delete type result))))
+   %default-options))
+
+(let ((opts (parse-options (cdr (program-arguments)))))
+  (with-postgresql-connection
+   "query-substitute-servers"
+   (lambda (conn)
+     (query-build-server-substitutes conn
+                                     (assq-ref opts 'build-server-ids)
+                                     (assq-ref opts 'revision-commits)
+                                     (assq-ref opts 'outputs)
+                                     #:verbose? (assq-ref opts 'verbose)))))