import: gem: Add recursive import.

* doc/guix.texi (Invoking guix import): Document gem recursive import.
* guix/import/gem.scm (gem->guix-package): Return package and dependencies
values.
(gem-recursive-import): New procedure.
* guix/scripts/import/gem.scm (show-help, %options): Add recursive option.
(guix-import-gem): Use 'gem-recursive-import'.
* tests/gem.scm (test-json): Rename to 'test-foo-json'.
("gem->guix-package"): Use 'test-foo-json'.
(test-bar-json, test-bundler-json): New variables.
("gem-recursive-import"): New test.

1 files changed, 105 insertions, 3 deletions

diff --git a/tests/gem.scm b/tests/gem.scm
index a39e8ba514..4220170ff0 100644
--- a/tests/gem.scm
+++ b/tests/gem.scm
@@ -1,6 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2015 David Thompson <davet@gnu.org>
 ;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
+;;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -23,10 +24,11 @@
   #:use-module (guix hash)
   #:use-module (guix tests)
   #:use-module ((guix build utils) #:select (delete-file-recursively))
+  #:use-module (srfi srfi-41)
   #:use-module (srfi srfi-64)
   #:use-module (ice-9 match))
 
-(define test-json
+(define test-foo-json
   "{
   \"name\": \"foo\",
   \"version\": \"1.0.0\",
@@ -42,6 +44,34 @@
   \"licenses\": [\"MIT\", \"Apache 2.0\"]
 }")
 
+(define test-bar-json
+  "{
+  \"name\": \"bar\",
+  \"version\": \"1.0.0\",
+  \"sha\": \"f3676eafca9987cb5fe263df1edf2538bf6dafc712b30e17be3543a9680547a8\",
+  \"info\": \"Another cool gem\",
+  \"homepage_uri\": \"https://example.com\",
+  \"dependencies\": {
+    \"runtime\": [
+      { \"name\": \"bundler\" },
+    ]
+  },
+  \"licenses\": [\"MIT\", \"Apache 2.0\"]
+}")
+
+(define test-bundler-json
+  "{
+  \"name\": \"bundler\",
+  \"version\": \"1.14.2\",
+  \"sha\": \"3bb53e03db0a8008161eb4c816ccd317120d3c415ba6fee6f90bbc7f7eec8690\",
+  \"info\": \"Ruby gem bundler\",
+  \"homepage_uri\": \"https://bundler.io/\",
+  \"dependencies\": {
+    \"runtime\": []
+  },
+  \"licenses\": [\"MIT\"]
+}")
+
 (test-begin "gem")
 
 (test-assert "gem->guix-package"
@@ -50,8 +80,8 @@
          (lambda (url . rest)
            (match url
              ("https://rubygems.org/api/v1/gems/foo.json"
-              (values (open-input-string test-json)
-                      (string-length test-json)))
+              (values (open-input-string test-foo-json)
+                      (string-length test-foo-json)))
              (_ (error "Unexpected URL: " url)))))
     (match (gem->guix-package "foo")
       (('package
@@ -76,4 +106,76 @@
       (x
        (pk 'fail x #f)))))
 
+(test-assert "gem-recursive-import"
+  ;; Replace network resources with sample data.
+  (mock ((guix http-client) http-fetch
+         (lambda (url . rest)
+           (match url
+             ("https://rubygems.org/api/v1/gems/foo.json"
+              (values (open-input-string test-foo-json)
+                      (string-length test-foo-json)))
+             ("https://rubygems.org/api/v1/gems/bar.json"
+              (values (open-input-string test-bar-json)
+                      (string-length test-bar-json)))
+             ("https://rubygems.org/api/v1/gems/bundler.json"
+              (values (open-input-string test-bundler-json)
+                      (string-length test-bundler-json)))
+             (_ (error "Unexpected URL: " url)))))
+        (match (stream->list (gem-recursive-import "foo"))
+          ((('package
+              ('name "ruby-foo")
+              ('version "1.0.0")
+              ('source
+               ('origin
+                 ('method 'url-fetch)
+                 ('uri ('rubygems-uri "foo" 'version))
+                 ('sha256
+                  ('base32
+                   "1a270mlajhrmpqbhxcqjqypnvgrq4pgixpv3w9gwp1wrrapnwrzk"))))
+              ('build-system 'ruby-build-system)
+              ('propagated-inputs
+               ('quasiquote
+                (("bundler" ('unquote 'bundler))
+                 ("ruby-bar" ('unquote 'ruby-bar)))))
+              ('synopsis "A cool gem")
+              ('description "This package provides a cool gem")
+              ('home-page "https://example.com")
+              ('license ('list 'license:expat 'license:asl2.0)))
+            ('package
+              ('name "ruby-bundler")
+              ('version "1.14.2")
+              ('source
+               ('origin
+                 ('method 'url-fetch)
+                 ('uri ('rubygems-uri "bundler" 'version))
+                 ('sha256
+                  ('base32
+                   "1446xiz7zg0bz7kgx9jv84y0s4hpsg61dj5l3qb0i00avc1kxd9v"))))
+              ('build-system 'ruby-build-system)
+              ('synopsis "Ruby gem bundler")
+              ('description "Ruby gem bundler")
+              ('home-page "https://bundler.io/")
+              ('license 'license:expat))
+            ('package
+              ('name "ruby-bar")
+              ('version "1.0.0")
+              ('source
+               ('origin
+                 ('method 'url-fetch)
+                 ('uri ('rubygems-uri "bar" 'version))
+                 ('sha256
+                  ('base32
+                   "1a270mlajhrmpqbhxcqjqypnvgrq4pgixpv3w9gwp1wrrapnwrzk"))))
+              ('build-system 'ruby-build-system)
+              ('propagated-inputs
+               ('quasiquote
+                (('"bundler" ('unquote 'bundler)))))
+              ('synopsis "Another cool gem")
+              ('description "Another cool gem")
+              ('home-page "https://example.com")
+              ('license ('list 'license:expat 'license:asl2.0))))
+           #t)
+          (x
+           (pk 'fail x #f)))))
+
 (test-end "gem")