From 830dc25176349112c759ba3986c721089e9ec605 Mon Sep 17 00:00:00 2001
From: Pierre Neidhardt <mail@ambrevar.xyz>
Date: Wed, 24 Oct 2018 10:57:43 +0200
Subject: gnu: Move go-golang-org-x-crypto-union from syncthing.scm to
 golang.scm

* gnu/packages/syncthing.scm (go-golang-org-x-crypto-union): Delete.
* gnu/packages/golang.scm (go-golang-org-x-crypto-union): Add.
---
 gnu/packages/golang.scm | 42 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

(limited to 'gnu/packages/golang.scm')

diff --git a/gnu/packages/golang.scm b/gnu/packages/golang.scm
index 9c81534205..f59ddd1386 100644
--- a/gnu/packages/golang.scm
+++ b/gnu/packages/golang.scm
@@ -36,6 +36,7 @@
   #:use-module (guix git-download)
   #:use-module (guix packages)
   #:use-module (guix build-system gnu)
+  #:use-module (guix build-system trivial)
   #:use-module (guix build-system go)
   #:use-module (gnu packages admin)
   #:use-module (gnu packages gcc)
@@ -47,7 +48,8 @@
   #:use-module (gnu packages mp3)
   #:use-module (ice-9 match)
   #:use-module (srfi srfi-1)
-  #:export (go-github-com-gogo-protobuf-union))
+  #:export (go-github-com-gogo-protobuf-union)
+  #:export (go-golang-org-x-crypto-union))
 
 ;; According to https://golang.org/doc/install/gccgo, gccgo-4.8.2 includes a
 ;; complete go-1.1.2 implementation, gccgo-4.9 includes a complete go-1.2
@@ -988,6 +990,44 @@ Tiny Encryption Algorithm (XTEA) block cipher.")
       (home-page "https://go.googlesource.com/crypto/")
       (license license:bsd-3))))
 
+;; Go searches for library modules by looking in the GOPATH environment
+;; variable.  This variable is a list of paths.  However, Go does not
+;; keep searching on GOPATH if it tries and fails to import a module.
+;; So, we use a union for packages sharing a namespace.
+(define* (go-golang-org-x-crypto-union #:optional
+                                    (packages (list go-golang-org-x-crypto-blowfish
+                                                    go-golang-org-x-crypto-bcrypt
+                                                    go-golang-org-x-crypto-tea
+                                                    go-golang-org-x-crypto-xtea
+                                                    go-golang-org-x-crypto-pbkdf2
+                                                    go-golang-org-x-crypto-twofish
+                                                    go-golang-org-x-crypto-cast5
+                                                    go-golang-org-x-crypto-salsa20)))
+  (package
+    (name "go-golang-org-x-crypto")
+    (version (package-version go-golang-org-x-crypto-bcrypt))
+    (source #f)
+    (build-system trivial-build-system)
+    (arguments
+     '(#:modules ((guix build union))
+       #:builder (begin
+                   (use-modules (ice-9 match)
+                                (guix build union))
+                   (match %build-inputs
+                     (((names . directories) ...)
+                      (union-build (assoc-ref %outputs "out")
+                                   directories)
+                      #t)))))
+    (inputs (map (lambda (package)
+                   (list (package-name package) package))
+                 packages))
+    (synopsis "Union of the Go x crypto libraries")
+    (description "A union of the Golang cryptographic libraries.  A
+union is required because `go build` assumes that all of the headers and
+libraries are in the same directory.")
+    (home-page (package-home-page go-golang-org-x-crypto-bcrypt))
+    (license (package-license go-golang-org-x-crypto-bcrypt))))
+
 (define-public go-golang-org-x-net-ipv4
   (let ((commit "d866cfc389cec985d6fda2859936a575a55a3ab6")
         (revision "1"))
-- 
cgit v1.2.3