Revise gpg stanza order and parameters

lib/cask/dsl/gpg.rb

@@ -1,40 +1,36 @@
 class Cask::DSL::Gpg
 
-  VALID_TYPES = Set.new [
-                         :id,   # first one is the default
-                         :url,
-                        ]
+  KEY_PARAMETERS = Set.new [
+                            :key_id,
+                            :key_url,
+                           ]
 
-  REQUIRED_PARAMETERS = [
-                         :signature
-                        ]
+  VALID_PARAMETERS = Set.new [ ]
+  VALID_PARAMETERS.merge KEY_PARAMETERS
 
-  attr_reader :key, :parameters, :type, :signature
+  attr_accessor *VALID_PARAMETERS
+  attr_accessor :signature
 
-  def initialize(key, parameters={})
+  def initialize(signature, parameters={})
     @parameters = parameters
-    REQUIRED_PARAMETERS.each do |param|
-      unless @parameters.key?(param) and not @parameters[param].nil?
-        raise "gpg #{param.inspect} parameter is required"
-      end
+    @signature = Cask::UnderscoreSupportingURI.parse(signature)
+    parameters.each do |hkey, hvalue|
+      raise "invalid 'gpg' parameter: '#{hkey.inspect}'" unless VALID_PARAMETERS.include?(hkey)
+      writer_method = "#{hkey}=".to_sym
+      hvalue = Cask::UnderscoreSupportingURI.parse(hvalue) if hkey == :key_url
+      send(writer_method, hvalue)
     end
-    @key       = key
-    @signature = Cask::UnderscoreSupportingURI.parse(@parameters[:signature])
-    @type      = @parameters[:type]
-    @type      = VALID_TYPES.first if @type.nil?
-    unless VALID_TYPES.include?(@type)
-      raise "invalid gpg type: '#{@type.inspect}'"
-    end
-    if @type == :url
-      @key = Cask::UnderscoreSupportingURI.parse(@key)
+    unless KEY_PARAMETERS.intersection(parameters.keys).length == 1
+      raise "'gpg' stanza must include exactly one of: '#{KEY_PARAMETERS.to_a}'"
     end
   end
 
   def to_yaml
-    [@key, @parameters].to_yaml
+    # bug, :key_url value is not represented as an instance of Cask::UnderscoreSupportingURI
+    [@signature, @parameters].to_yaml
   end
 
   def to_s
-    @key.to_s
+    @signature.to_s
   end
 end

test/cask/dsl_test.rb

@@ -159,13 +159,32 @@ def caveats; <<-EOS.undent
       cask.gpg.to_s.must_match %r{\S}
     end
 
-    it "prevents specifying gpg multiple times" do
+    it "allows gpg stanza to be specified with :key_url" do
+      cask = Cask.load('with-gpg-key-url')
+      cask.gpg.to_s.must_match %r{\S}
+    end
+
+    it "prevents specifying gpg stanza multiple times" do
       err = lambda {
-        invalid_cask = Cask.load('invalid/invalid-gpg-multiple')
+        invalid_cask = Cask.load('invalid/invalid-gpg-multiple-stanzas')
       }.must_raise(CaskInvalidError)
       err.message.must_include "'gpg' stanza may only appear once"
     end
 
+    it "prevents missing gpg key parameters" do
+      err = lambda {
+        invalid_cask = Cask.load('invalid/invalid-gpg-missing-key')
+      }.must_raise(CaskInvalidError)
+      err.message.must_include "'gpg' stanza must include exactly one"
+    end
+
+    it "prevents conflicting gpg key parameters" do
+      err = lambda {
+        invalid_cask = Cask.load('invalid/invalid-gpg-conflicting-keys')
+      }.must_raise(CaskInvalidError)
+      err.message.must_include "'gpg' stanza must include exactly one"
+    end
+
     it "refuses to load invalid gpg signature URLs" do
       err = lambda {
         invalid_cask = Cask.load('invalid/invalid-gpg-signature-url')
@@ -178,9 +197,9 @@ def caveats; <<-EOS.undent
       }.must_raise(CaskInvalidError)
     end
 
-    it "refuses to load if gpg :type is invalid" do
+    it "refuses to load if gpg parameter is unknown" do
       err = lambda {
-        invalid_cask = Cask.load('invalid/invalid-gpg-type')
+        invalid_cask = Cask.load('invalid/invalid-gpg-parameter')
       }.must_raise(CaskInvalidError)
     end
   end

test/support/Casks/invalid/invalid-gpg-conflicting-keys.rb

@@ -0,0 +1,10 @@
+class InvalidGpgConflictingKeys < TestCask
+  url TestHelper.local_binary('caffeine.zip')
+  homepage 'http://example.com/invalid-gpg-conflicting-keys'
+  gpg 'http://example.com/gpg-signature.asc',
+      :key_id => 'ID',
+      :key_url => 'http://example.com/gpg-key-url'
+  sha256 '9203c30951f9aab41ac294bbeb1dcef7bed401ff0b353dcb34d68af32ea51853'
+  version '1.2.3'
+  link 'Caffeine.app'
+end

test/support/Casks/invalid/invalid-gpg-key-url.rb

@@ -1,8 +1,8 @@
 class InvalidGpgKeyUrl < TestCask
   url TestHelper.local_binary('caffeine.zip')
   homepage 'http://example.com/invalid-gpg-key-url'
-  gpg 1, :type => :url,
-         :signature => 'http://example.com/gpg-signature.asc'
+  gpg 'http://example.com/gpg-signature.asc',
+      :key_url => 1
   sha256 '9203c30951f9aab41ac294bbeb1dcef7bed401ff0b353dcb34d68af32ea51853'
   version '1.2.3'
   link 'Caffeine.app'

test/support/Casks/invalid/invalid-gpg-missing-key.rb

@@ -0,0 +1,8 @@
+class InvalidGpgMissingKeys < TestCask
+  url TestHelper.local_binary('caffeine.zip')
+  homepage 'http://example.com/invalid-gpg-missing-keys'
+  gpg 'http://example.com/gpg-signature.asc'
+  sha256 '9203c30951f9aab41ac294bbeb1dcef7bed401ff0b353dcb34d68af32ea51853'
+  version '1.2.3'
+  link 'Caffeine.app'
+end

test/support/Casks/invalid/invalid-gpg-multiple-stanzas.rb

@@ -0,0 +1,11 @@
+class InvalidGpgMultipleStanzas < TestCask
+  url TestHelper.local_binary('caffeine.zip')
+  homepage 'http://example.com/invalid-gpg-multiple-stanzas'
+  gpg 'http://example.com/gpg-signature.asc',
+      :key_id => 'ID'
+  gpg 'http://example.com/gpg-signature.asc',
+      :key_id => 'ID'
+  sha256 '9203c30951f9aab41ac294bbeb1dcef7bed401ff0b353dcb34d68af32ea51853'
+  version '1.2.3'
+  link 'Caffeine.app'
+end

test/support/Casks/invalid/invalid-gpg-parameter.rb

@@ -0,0 +1,9 @@
+class InvalidGpgParameter < TestCask
+  url TestHelper.local_binary('caffeine.zip')
+  homepage 'http://example.com/invalid-gpg-type'
+  gpg 'http://example.com/gpg-signature.asc',
+      :no_such_parameter => :value
+  sha256 '9203c30951f9aab41ac294bbeb1dcef7bed401ff0b353dcb34d68af32ea51853'
+  version '1.2.3'
+  link 'Caffeine.app'
+end

test/support/Casks/invalid/invalid-gpg-signature-url.rb

@@ -1,8 +1,8 @@
 class InvalidGpgSignatureUrl < TestCask
   url TestHelper.local_binary('caffeine.zip')
   homepage 'http://example.com/invalid-gpg-signature-url'
-  gpg 'ID', :type => :id,
-            :signature => 1
+  gpg 1,
+      :key_id => 'ID'
   sha256 '9203c30951f9aab41ac294bbeb1dcef7bed401ff0b353dcb34d68af32ea51853'
   version '1.2.3'
   link 'Caffeine.app'

test/support/Casks/invalid/invalid-gpg-type.rb

@@ -1,8 +1,8 @@
-class InvalidGpgType < TestCask
+class InvalidGpgParameter < TestCask
   url TestHelper.local_binary('caffeine.zip')
   homepage 'http://example.com/invalid-gpg-type'
-  gpg 'ID', :type => :no_such_type,
-            :signature => 'http://example.com/gpg-signature.asc'
+  gpg 'http://example.com/gpg-signature.asc',
+      :no_such_parameter => :value
   sha256 '9203c30951f9aab41ac294bbeb1dcef7bed401ff0b353dcb34d68af32ea51853'
   version '1.2.3'
   link 'Caffeine.app'

test/support/Casks/with-gpg-key-url.rb

@@ -0,0 +1,9 @@
+class WithGpgKeyUrl < TestCask
+  url TestHelper.local_binary('caffeine.zip')
+  homepage 'http://example.com/with-gpg-key-url'
+  gpg 'http://example.com/gpg-signature.asc',
+      :key_url => 'http://example.com/gpg-key-url'
+  sha256 '9203c30951f9aab41ac294bbeb1dcef7bed401ff0b353dcb34d68af32ea51853'
+  version '1.2.3'
+  link 'Caffeine.app'
+end

test/support/Casks/with-gpg.rb

@@ -1,8 +1,8 @@
 class WithGpg < TestCask
   url TestHelper.local_binary('caffeine.zip')
   homepage 'http://example.com/with-gpg'
-  gpg 'ID', :type => :id,
-            :signature => 'http://example.com/gpg-signature.asc'
+  gpg 'http://example.com/gpg-signature.asc',
+      :key_id => 'ID'
   sha256 '9203c30951f9aab41ac294bbeb1dcef7bed401ff0b353dcb34d68af32ea51853'
   version '1.2.3'
   link 'Caffeine.app'