[bug#50885] [PATCH] import: go: Recognize major version suffixes.

[Sarah Morgensen <iskarian@mgsn.dev>]

Do not treat major version suffixes (such as "/v3") as repository
subdirectories.  See <https://golang.org/ref/mod#major-version-suffixes>.

* guix/import/go.scm (go-module->guix-package): When determining the
unpack path, compare 'root-module-path' to 'module-path-sans-suffix'
instead of 'module-path'.
---
 guix/import/go.scm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/guix/import/go.scm b/guix/import/go.scm
index ca909ab35a..26dbc34b63 100644
--- a/guix/import/go.scm
+++ b/guix/import/go.scm
@@ -612,6 +612,8 @@ hint: use one of the following available versions ~a\n"
          (dependencies (if pin-versions?
                            dependencies+versions
                            (map car dependencies+versions)))
+         (module-path-sans-suffix
+          (match:prefix (string-match "([\\./]v[0-9]+)?$" module-path)))
          (guix-name (go-module->guix-package-name module-path))
          (root-module-path (module-path->repository-root module-path))
          ;; The VCS type and URL are not included in goproxy information. For
@@ -631,7 +633,7 @@ hint: use one of the following available versions ~a\n"
         (build-system go-build-system)
         (arguments
          '(#:import-path ,module-path
-           ,@(if (string=? module-path root-module-path)
+           ,@(if (string=? module-path-sans-suffix root-module-path)
                  '()
                  `(#:unpack-path ,root-module-path))))
         ,@(maybe-propagated-inputs

base-commit: c582be4c38596a6a31a39c6799723dcd8b6eb909
prerequisite-patch-id: dbb8a05982f57aefffd5b97ab3dac4073b48245d
-- 
2.33.0