[PATCH 4/4] gnu: Add ruby-concurrent.

[Ben Woodcroft]

* gnu/packages/ruby.scm (ruby-concurrent): New variable.
* gnu/packages/patches/ruby-concurrent-ignore-broken-test.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
---
 gnu/local.mk                                       |  1 +
 .../ruby-concurrent-ignore-broken-test.patch       | 37 ++++++++++++++
 gnu/packages/ruby.scm                              | 58 ++++++++++++++++++++++
 3 files changed, 96 insertions(+)
 create mode 100644 
gnu/packages/patches/ruby-concurrent-ignore-broken-test.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index c3a3ea4..65146db 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -731,6 +731,7 @@ dist_patch_DATA =                                           
\
   %D%/packages/patches/ripperx-missing-file.patch              \
   %D%/packages/patches/rpm-CVE-2014-8118.patch                 \
   %D%/packages/patches/rsem-makefile.patch                     \
+  %D%/packages/patches/ruby-concurrent-ignore-broken-test.patch        \
   %D%/packages/patches/ruby-symlinkfix.patch                    \
   %D%/packages/patches/rush-CVE-2013-6889.patch                        \
   %D%/packages/patches/sed-hurd-path-max.patch                 \
diff --git a/gnu/packages/patches/ruby-concurrent-ignore-broken-test.patch 
b/gnu/packages/patches/ruby-concurrent-ignore-broken-test.patch
new file mode 100644
index 0000000..803d8a8
--- /dev/null
+++ b/gnu/packages/patches/ruby-concurrent-ignore-broken-test.patch
@@ -0,0 +1,37 @@
+diff --git a/spec/concurrent/channel_spec.rb b/spec/concurrent/channel_spec.rb
+index d70fba8..f1bcc0a 100644
+--- a/spec/concurrent/channel_spec.rb
++++ b/spec/concurrent/channel_spec.rb
+@@ -598,19 +598,19 @@ module Concurrent
+           }.to raise_error(ArgumentError)
+         end
+ 
+-        it 'loops until the block returns false' do
+-          actual = 0
+-          expected = 3
+-          latch = Concurrent::CountDownLatch.new(expected)
+-          Channel.go_loop do
+-            actual += 1
+-            latch.count_down
+-            actual < expected
+-          end
+-
+-          latch.wait(10)
+-          expect(actual).to eq expected
+-        end
++        # it 'loops until the block returns false' do
++        #   actual = 0
++        #   expected = 3
++        #   latch = Concurrent::CountDownLatch.new(expected)
++        #   Channel.go_loop do
++        #     actual += 1
++        #     latch.count_down
++        #     actual < expected
++        #   end
++
++        #   latch.wait(10)
++        #   expect(actual).to eq expected
++        # end
+       end
+ 
+       context '.go_loop_via' do
diff --git a/gnu/packages/ruby.scm b/gnu/packages/ruby.scm
index 71b13e4..e761062 100644
--- a/gnu/packages/ruby.scm
+++ b/gnu/packages/ruby.scm
@@ -4005,4 +4005,62 @@ provides a unified method to mock @code{Time.now}, 
@code{Date.today}, and
     (home-page "https://github.com/travisjeffery/timecop";)
     (license license:expat)))
 
+(define-public ruby-concurrent
+  (package
+    (name "ruby-concurrent")
+    (version "1.0.2")
+    (source
+     (origin
+       (method url-fetch)
+       ;; Download from GitHub because the rubygems version does not contain
+       ;; Rakefile.
+       (uri (string-append
+             "https://github.com/ruby-concurrency/concurrent-ruby/archive/v";
+             version
+             ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1x3g2admp14ykwfxidsicqbhlfsnxh9wyc806np4i15hws4if1d8"))
+       ;; Exclude failing test reported at
+       ;; https://github.com/ruby-concurrency/concurrent-ruby/issues/534
+       (patches (search-patches "ruby-concurrent-ignore-broken-test.patch"))))
+    (build-system ruby-build-system)
+    (arguments
+     `(#:test-target "spec"
+       #:phases
+       (modify-phases %standard-phases
+         (add-before 'build 'remove-git-lsfiles-and-extra-gemspecs
+           (lambda _
+             (for-each (lambda (file)
+                         (substitute* file
+                           (("git ls-files") "find *")))
+                       (list "concurrent-ruby.gemspec"
+                             "concurrent-ruby-edge.gemspec"
+                             "support/file_map.rb"))
+             #t))
+         (add-before 'build 'remove-extra-gemspecs
+           (lambda _
+             ;; Delete extra gemspec files so 'first-gemspec' chooses the
+             ;; correct one.
+             (delete-file "concurrent-ruby-edge.gemspec")
+             (delete-file "concurrent-ruby-ext.gemspec")
+             #t))
+         (add-before 'check 'rake-compile
+           ;; Fix the test error described at
+           ;; https://github.com/ruby-concurrency/concurrent-ruby/pull/408
+           (lambda _ (zero? (system* "rake" "compile")))))))
+    (native-inputs
+     `(("ruby-rake-compiler" ,ruby-rake-compiler)
+       ("ruby-yard" ,ruby-yard)
+       ("ruby-rspec" ,ruby-rspec)
+       ("ruby-timecop" ,ruby-timecop)))
+    (synopsis "Concurrency tools for Ruby")
+    (description
+     "This library provides modern concurrency tools including agents,
+futures, promises, thread pools, actors, supervisors, and more.  It is
+inspired by Erlang, Clojure, Go, JavaScript, actors and classic concurrency
+patterns.")
+    (home-page "http://www.concurrent-ruby.com";)
+    (license license:expat)))
 
-- 
2.7.4