[bug#43183] [PATCH v3 1/4] gnu: Add guile-struct-pack.

[Martin Becze]

* gnu/packages/guile-xyz.scm (guile-struct-pack): New variable.
---
 gnu/packages/guile-xyz.scm | 44 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm
index 80f792672c..e1c763faef 100644
--- a/gnu/packages/guile-xyz.scm
+++ b/gnu/packages/guile-xyz.scm
@@ -3867,3 +3867,47 @@ between data, in a way that is very similar to WikiData 
or RDF for instance.
 An object can have relations (in the form of an IRI) that relates it to one or
 more objects or strings, represented by a Json object or an IRI.")
     (license license:gpl3+)))
+
+(define-public guile-struct-pack
+  (package
+    (name "guile-struct-pack")
+    (version "1.1.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/weinholt/struct-pack.git";)
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0hd72m821pahjphzyjn26i55542v8makr55xzjll2cycja4wsbc1"))))
+    (build-system guile-build-system)
+    (arguments
+     `(#:compile-flags '("--r6rs" "-Wunbound-variable" "-Warity-mismatch")
+       #:modules ((guix build guile-build-system)
+                  (guix build utils)
+                  (srfi srfi-26)
+                  (ice-9 ftw))
+       #:phases (modify-phases %standard-phases
+                  (add-before 'build 'move-sls-files
+                    (lambda _
+                      ;; Move files under a struct/ directory to reflect the
+                      ;; module hierarchy.
+                      (define dst-folder "struct")
+                      (define (target file)
+                        (string-append dst-folder "/" file))
+                      (define files
+                        (scandir "." (negate (cut member <> '("." "..")))))
+                      (mkdir dst-folder)
+                      (for-each (lambda (file)
+                                  (rename-file file (target file)))
+                                files)
+                      #t)))))
+    (native-inputs
+     `(("guile" ,guile-3.0)))
+    (home-page "https://github.com/weinholt/struct-pack";)
+    (synopsis "R6RS library for working with packed byte structures")
+    (description
+     "This is an R6RS library for working with packed byte structures.  It is
+similar to struct in Python or pack and unpack in Perl.")
+    (license license:expat)))
-- 
2.28.0