gnu: Add go-github-com-urfave-cli-altsrc-v3.

* gnu/packages/golang-xyz.scm (go-github-com-urfave-cli-altsrc-v3): New variable.

Change-Id: I8f84face3baf4f2c598571d2c4c5991e0f4ba826
Co-authored-by: Sharlatan Hellseher <sharlatanus@gmail.com>
Signed-off-by: Sharlatan Hellseher <sharlatanus@gmail.com>

gnu/packages/golang-xyz.scm

@@ -67,6 +67,7 @@
 ;;; Copyright © 2025 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2025 Tomas Volf <~@wolfsden.cz>
 ;;; Copyright © 2025 Arthur Rodrigues <arthurhdrodrigues@proton.me>
+;;; Copyright © 2025 Tomás Ortín Fernández <quanrong@mailbox.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -19873,6 +19874,43 @@ distributable command line applications in an expressive way.")
       #~(list "-vet=off")))
     (propagated-inputs '())))
 
+(define-public go-github-com-urfave-cli-altsrc-v3
+  (package
+    (name "go-github-com-urfave-cli-altsrc-v3")
+    (version "3.0.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/urfave/cli-altsrc")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0nk1c31li7yijfa2p9s2723p5727ad3fl80dj6a5cwjg1qkbsl12"))))
+    (build-system go-build-system)
+    (arguments
+     (list
+      #:tests? #f ;tests need git in PATH
+      #:import-path "github.com/urfave/cli-altsrc/v3"
+      ;; Pattern autocomplete: cannot embed directory autocomplete: contains
+      ;; no embeddable files.
+      #:embed-files
+      #~(list "bash_autocomplete"
+              "powershell_autocomplete.ps1"
+              "zsh_autocomplete")))
+    (native-inputs
+     (list go-github-com-stretchr-testify
+           go-github-com-urfave-cli-v3))
+    (propagated-inputs
+     (list go-github-com-burntsushi-toml
+           go-gopkg-in-yaml-v3))
+    (home-page "https://github.com/urfave/cli-altsrc")
+    (synopsis "Read values for urfave/cli/v3 flags from config files")
+    (description
+     "This package provides an extension for https://github.com/urfave/cli, to
+read flag values from JSON, YAML, and TOML.")
+    (license license:expat)))
+
 (define-public go-github-com-valyala-bytebufferpool
   (package
     (name "go-github-com-valyala-bytebufferpool")