[bug#38754] [PATCH 2/2] scripts: lint: Set the %link-checker-store-connection parameter.

[Christopher Baines]

If set, this parameter provides a store connection used by the derivation
linter. Without this being set, the derivation linter establishes a new
connection for each package. With this change, I saw the time taken to lint
all packages with the derivation linter drop from over 4 minutes to around 3
minutes.

* guix/scripts/lint.scm (guix-lint): Set the %lint-checker-store-connection)
parameter.
---
 guix/scripts/lint.scm | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/guix/scripts/lint.scm b/guix/scripts/lint.scm
index 8d08c484f5..47c104217d 100644
--- a/guix/scripts/lint.scm
+++ b/guix/scripts/lint.scm
@@ -28,6 +28,7 @@
 
 (define-module (guix scripts lint)
   #:use-module (guix packages)
+  #:use-module (guix store)
   #:use-module (guix lint)
   #:use-module (guix ui)
   #:use-module (guix scripts)
@@ -167,12 +168,15 @@ run the checkers on all packages.\n"))
                              (_ #f))
                            (reverse opts)))
          (checkers (or (assoc-ref opts 'checkers) %all-checkers)))
-    (cond
-     ((assoc-ref opts 'list?)
-      (list-checkers-and-exit checkers))
-     ((null? args)
-      (fold-packages (lambda (p r) (run-checkers p checkers)) '()))
-     (else
-      (for-each (lambda (spec)
-                  (run-checkers (specification->package spec) checkers))
-                args)))))
+    (with-store store
+      (parameterize
+          ((%lint-checker-store-connection store))
+        (cond
+         ((assoc-ref opts 'list?)
+          (list-checkers-and-exit checkers))
+         ((null? args)
+          (fold-packages (lambda (p r) (run-checkers p checkers)) '()))
+         (else
+          (for-each (lambda (spec)
+                      (run-checkers (specification->package spec) checkers))
+                    args)))))))
-- 
2.24.1