guix lint: Make sure synopses are not too long.

* guix/scripts/lint.scm (check-synopsis-length): New procedure.
* tests/lint.scm ("synopsis: too long"): New test.

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/lint.scm b/tests/lint.scm
index 56558c904f..e0829089b4 100644
--- a/tests/lint.scm
+++ b/tests/lint.scm
@@ -79,6 +79,15 @@
                         (check-synopsis-style pkg))))
                     "no article allowed at the beginning of the synopsis")))
 
+(test-assert "synopsis: too long"
+  (->bool
+   (string-contains (call-with-warnings
+                      (lambda ()
+                        (let ((pkg (dummy-package "x"
+                                     (synopsis (make-string 80 #\x)))))
+                          (check-synopsis-style pkg))))
+                    "synopsis should be less than 80 characters long")))
+
 (test-assert "inputs: pkg-config is probably a native input"
   (->bool
    (string-contains