style: git-source: Handle more URLs.

* guix/import/utils.scm (tarball-url->git-repository-url): New procedure.
* guix/scripts/style.scm (url-fetch->git-fetch)[transform-source]: Add
‘repository-url’ parameter.
Use ‘tarball-url->git-repository-url’ when ‘home-page’ is not a Git URL.
(transform-to-git-fetch): Rename ‘home-page’ to ‘repository-url’.
* tests/import/utils.scm ("tarball-url->git-repository-url, guile"): New test.
* tests/style.scm ("url-fetch->git-fetch, mirror:// URL"): New test.

Change-Id: I4f8ca7c67a58f917d69380678b62c00962b0f9cd
Signed-off-by: Ludovic Courtès <ludo@gnu.org>

tests/import/utils.scm

@@ -344,4 +344,13 @@ error procedure has been called."
   (let ((sexp error-called? (test-generate-git-source "1.0.0" "2.0.0")))
     error-called?))
 
+(test-equal "tarball-url->git-repository-url, guile"
+  '("https://https.git.savannah.gnu.org/git/guile.git"
+    "https://gitlab.gnome.org/GNOME/brasero.git"
+    "https://github.com/aide/aide")
+  (map tarball-url->git-repository-url
+       '("mirror://gnu/guile/guile-3.0.11.tar.gz"
+         "mirror://gnome/sources/brasero/3.12/brasero-3.12.3.tar.xz"
+         "https://github.com/aide/aide/releases/download/v0.19.3/aide-0.19.3.tar.gz")))
+
 (test-end "import-utils")

tests/style.scm

@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2021-2024 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2021-2024, 2026 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -669,6 +669,41 @@
                              (cut string-contains <> "patches")))))))
     "1"))
 
+(unless (false-if-exception
+         (getaddrinfo "https.git.savannah.gnu.org" "https"))
+  (test-skip 1))
+(test-equal "url-fetch->git-fetch, mirror:// URL"
+  '(origin
+     (method git-fetch)
+     (uri (git-reference
+            (url "https://https.git.savannah.gnu.org/git/sed.git")
+            (commit (string-append "v" version))))
+     (file-name (git-file-name name version))
+     (sha256
+      (base32
+       "00p6v3aa22jz365scmifr06fspkylzrvbqda0waz4x06q5qv0263")))
+  (call-with-test-package
+      '((version "4.9")
+        (source
+         (origin
+           (method url-fetch)
+           (uri (string-append "mirror://gnu/sed/sed-"
+                               version ".tar.gz"))
+           (sha256
+            (base32 "0000000000000000000000000000000000000000000000000000")))))
+    (lambda (directory)
+      (define file
+        (string-append directory "/my-packages-1.scm"))
+
+      ;; Note: This ends up cloning the 'sed' repository on Savannah.
+      (system* "guix" "style" "-L" directory "-S" "git-source" "my-coreutils-1")
+
+      (load file)
+      (call-with-input-string (read-package-field
+                               (@ (my-packages-1) my-coreutils-1) 'source 8)
+        read))
+    "1"))
+
 (test-assert "url-fetch->git-fetch, non-git home-page unchanged"
   (call-with-test-package
       '((home-page "https://www.example.com")