build-system/go: Allow providing additional test flags.

By allowing the use of test flags, we can more precisely skip failing tests
(for go version >=1.20), disable the vetting stage or select a subset of tests
(e.g. if an upstream flag is provided to skip tests which require a network
connection).  At the moment, the only way around these test failures is to
remove the test file completely or patch the code ourselves.

* guix/build-system/go.scm (go-build): Add test-flags variable.
(go-cross-build): Add test-flags variable.
* guix/build/go-build-system.scm (check): Pass the additional test flags to the invoke call.
* doc/guix.texi (go-build-system): Document <#:test-flags> parameter.

Signed-off-by: Sharlatan Hellseher <sharlatanus@gmail.com>
Change-Id: I4015870fbbc15503cb405fe9ef6032953a5ff17f

doc/guix.texi

@@ -9582,6 +9582,12 @@ in their documentation}.
 The key @code{#:go} can be used to specify the Go compiler package with
 which to build the package.
 
+The phase @code{check} provides a wrapper for @code{go test} which
+builds a test binary (or multiple binaries), vets the code and then runs
+the test binary.  Build, test and test binary flags can be provided as
+@code{#:test-flags} parameter, default is @code{'()}.  See @code{go help
+test} and @code{go help testflag} for more details.
+
 @end defvar
 
 @defvar glib-or-gtk-build-system

guix/build-system/go.scm

@@ -192,6 +192,7 @@ (define* (go-build name inputs
                    (unpack-path "")
                    (build-flags ''())
                    (tests? #t)
+                   (test-flags ''())
                    (parallel-build? #t)
                    (parallel-tests? #t)
                    (allow-go-reference? #f)
@@ -224,6 +225,7 @@ (define builder
                     #:unpack-path #$unpack-path
                     #:build-flags #$build-flags
                     #:tests? #$tests?
+                    #:test-flags #$test-flags
                     #:parallel-build? #$parallel-build?
                     #:parallel-tests? #$parallel-tests?
                     #:allow-go-reference? #$allow-go-reference?
@@ -248,6 +250,7 @@ (define* (go-cross-build name
                          (unpack-path "")
                          (build-flags ''())
                          (tests? #f)              ; nothing can be done
+                         (test-flags ''())
                          (allow-go-reference? #f)
                          (system (%current-system))
                          (goarch (first (go-target target)))
@@ -297,6 +300,7 @@ (define %outputs
                     #:unpack-path #$unpack-path
                     #:build-flags #$build-flags
                     #:tests? #$tests?
+                    #:test-flags #$test-flags
                     #:make-dynamic-linker-cache? #f ;cross-compiling
                     #:allow-go-reference? #$allow-go-reference?
                     #:inputs %build-inputs))))

guix/build/go-build-system.scm

@@ -278,14 +278,13 @@ (define* (build #:key import-path build-flags (parallel-build? #t)
                               "Here are the results of `go env`:\n"))
       (invoke "go" "env"))))
 
-;; Can this also install commands???
-(define* (check #:key tests? import-path (parallel-tests? #t)
+(define* (check #:key tests? import-path test-flags (parallel-tests? #t)
                 #:allow-other-keys)
   "Run the tests for the package named by IMPORT-PATH."
   (when tests?
     (let* ((njobs (if parallel-tests? (parallel-job-count) 1)))
       (setenv "GOMAXPROCS" (number->string njobs)))
-    (invoke "go" "test" import-path))
+    (apply invoke "go" "test" `(,import-path ,@test-flags)))
   #t)
 
 (define* (install #:key install-source? outputs import-path unpack-path #:allow-other-keys)