[Environment Variables] Add support for scheme environment variables

.rubocop_todo.yml

@@ -1,35 +1,23 @@
-# This configuration was generated by `rubocop --auto-gen-config`
-# on 2015-03-06 13:49:50 +0100 using RuboCop version 0.28.0.
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2015-10-25 15:59:02 -0700 using RuboCop version 0.34.2.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-# Offense count: 499
+# Offense count: 804
 # Configuration parameters: AllowURI, URISchemes.
 Metrics/LineLength:
   Max: 186
 
-# Offense count: 66
-# Configuration parameters: CountComments.
-Metrics/MethodLength:
-  Max: 46
-
 # Offense count: 2
 # Configuration parameters: CountKeywordArgs.
 Metrics/ParameterLists:
   Max: 7
 
-# Offense count: 9
-Metrics/PerceivedComplexity:
-  Max: 16
-
 # Offense count: 94
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, SupportedStyles.
 Style/DotPosition:
   Enabled: false
-
-# Offense count: 1
-Style/DoubleNegation:
-  Enabled: false

CHANGELOG.md

@@ -4,6 +4,10 @@
 
 ##### Enhancements
 
+* Add accessors for working with Environment Variables in xcscheme files
+  [Justin Martin](https://github.com/justinseanmartin)
+  [Xcodeproj#326](https://github.com/CocoaPods/Xcodeproj/pull/326)
+
 * Add method to create new variant groups (groups for localized versions of the same file)  
   [Tim Bodeit](https://github.com/timbodeit)
   [Xcodeproj#315](https://github.com/CocoaPods/Xcodeproj/pull/315)

lib/xcodeproj/constants.rb

@@ -8,7 +8,7 @@ module Constants
 
     # @return [String] The last known OS X SDK (stable).
     #
-    LAST_KNOWN_OSX_SDK  = '10.11'
+    LAST_KNOWN_OSX_SDK = '10.11'
 
     # @return [String] The last known tvOS SDK (stable).
     LAST_KNOWN_TVOS_SDK = '9.0'

lib/xcodeproj/scheme/environment_variables.rb

@@ -0,0 +1,170 @@
+require 'xcodeproj/scheme/xml_element_wrapper'
+
+module Xcodeproj
+  class XCScheme
+    VARIABLES_NODE = 'EnvironmentVariables'
+    VARIABLE_NODE = 'EnvironmentVariable'
+
+    # This class wraps the EnvironmentVariables node of a .xcscheme XML file. This
+    # is just a container of EnvironmentVariable objects. It can either appear on a
+    # LaunchAction or TestAction scheme group.
+    #
+    class EnvironmentVariables < XMLElementWrapper
+      # @param [nil,REXML::Element,Array<EnvironmentVariable>,Array<Hash{Symbol => String,Bool}>] node_or_variables
+      #        The 'EnvironmentVariables' XML node, or list of environment variables, that this object represents.
+      #          - If nil, an empty 'EnvironmentVariables' XML node will be created
+      #          - If an REXML::Element, it must be named 'EnvironmentVariables'
+      #          - If an Array of objects or Hashes, they'll each be passed to {#assign_variable}
+      #
+      def initialize(node_or_variables = nil)
+        create_xml_element_with_fallback(node_or_variables, VARIABLES_NODE) do
+          @all_variables = []
+          node_or_variables.each { |var| assign_variable(var) } unless node_or_variables.nil?
+        end
+      end
+
+      # @return [Array<EnvironmentVariable>]
+      #         The key value pairs currently set in @xml_element
+      #
+      def all_variables
+        @all_variables ||= @xml_element.get_elements(VARIABLE_NODE).map { |variable| EnvironmentVariable.new(variable) }
+      end
+
+      # Adds a given variable to the set of environment variables, or replaces it if that key already exists
+      #
+      # @param [EnvironmentVariable,Hash{Symbol => String,Bool}] variable
+      #        The variable to add or update, backed by an EnvironmentVariable node.
+      #          - If an EnvironmentVariable, the previous reference will still be valid
+      #          - If a Hash, must conform to {EnvironmentVariable#initialize} requirements
+      # @return [Array<EnvironmentVariable>]
+      #         The new set of environment variables after addition
+      #
+      def assign_variable(variable)
+        env_var = variable.is_a?(EnvironmentVariable) ? variable : EnvironmentVariable.new(variable)
+        all_variables.each { |existing_var| remove_variable(existing_var) if existing_var.key == env_var.key }
+        @xml_element.add_element(env_var.xml_element)
+        @all_variables << env_var
+      end
+
+      # Removes a specified variable (by string or object) from the set of environment variables
+      #
+      # @param [EnvironmentVariable,String] variable
+      #        The variable to remove
+      # @return [Array<EnvironmentVariable>]
+      #         The new set of environment variables after removal
+      #
+      def remove_variable(variable)
+        env_var = variable.is_a?(EnvironmentVariable) ? variable : all_variables.find { |var| var.key == variable }
+        raise "Unexpected parameter type: #{env_var.class}" unless env_var.is_a?(EnvironmentVariable)
+        @xml_element.delete_element(env_var.xml_element)
+        @all_variables -= [env_var]
+      end
+
+      # @param [String] key
+      #        The key to lookup
+      # @return [EnvironmentVariable] variable
+      #         Returns the matching environment variable for a specified key
+      #
+      def [](key)
+        all_variables.find { |var| var.key == key }
+      end
+
+      # Assigns a value for a specified key
+      #
+      # @param [String] key
+      #   The key to update in the environment variables
+      # @param [String] value
+      #   The value to lookup
+      # @return [EnvironmentVariable] variable
+      #   The newly updated environment variable
+      #
+      def []=(key, value)
+        assign_variable(:key => key, :value => value)
+        self[key]
+      end
+
+      # @return Array<Hash{Symbol => String,Bool}>
+      #   The current environment variables represented as an array
+      #
+      def to_a
+        all_variables.map(&:to_h)
+      end
+    end
+
+    # This class wraps the EnvironmentVariable node of a .xcscheme XML file.
+    # Environment variables are accessible via the NSDictionary returned from
+    # [[NSProcessInfo processInfo] environment] in your app code.
+    #
+    class EnvironmentVariable < XMLElementWrapper
+      # @param [nil,REXML::Element,Hash{Symbol => String,Bool}] node_or_variable
+      #        - If nil, it will create a default XML node to use
+      #        - If a REXML::Element, should be a <EnvironmentVariable> XML node to wrap
+      #        - If a Hash, must contain keys :key and :value (Strings) and optionally :enabled (Boolean)
+      #
+      def initialize(node_or_variable)
+        create_xml_element_with_fallback(node_or_variable, VARIABLE_NODE) do
+          raise "Must pass a Hash with 'key' and 'value'!" unless node_or_variable.is_a?(Hash) &&
+              node_or_variable.key?(:key) && node_or_variable.key?(:value)
+
+          @xml_element.attributes['key'] = node_or_variable[:key]
+          @xml_element.attributes['value'] = node_or_variable[:value]
+
+          if node_or_variable.key?(:enabled)
+            @xml_element.attributes['isEnabled'] = bool_to_string(node_or_variable[:enabled])
+          else
+            @xml_element.attributes['isEnabled'] = bool_to_string(true)
+          end
+        end
+      end
+
+      # Returns the EnvironmentValue's key
+      # @return [String]
+      #
+      def key
+        @xml_element.attributes['key']
+      end
+
+      # Sets the EnvironmentValue's key
+      # @param [String] key
+      #
+      def key=(key)
+        @xml_element.attributes['key'] = key
+      end
+
+      # Returns the EnvironmentValue's value
+      # @return [String]
+      #
+      def value
+        @xml_element.attributes['value']
+      end
+
+      # Sets the EnvironmentValue's value
+      # @param [String] value
+      #
+      def value=(value)
+        @xml_element.attributes['value'] = value
+      end
+
+      # Returns the EnvironmentValue's enabled state
+      # @return [Bool]
+      #
+      def enabled
+        string_to_bool(@xml_element.attributes['isEnabled'])
+      end
+
+      # Sets the EnvironmentValue's enabled state
+      # @param [Bool] enabled
+      #
+      def enabled=(enabled)
+        @xml_element.attributes['isEnabled'] = bool_to_string(enabled)
+      end
+
+      # @return [Hash{:key => String, :value => String, :enabled => Bool}]
+      #         The environment variable XML node with attributes converted to a representative Hash
+      #
+      def to_h
+        { :key => key, :value => value, :enabled => enabled }
+      end
+    end
+  end
+end

lib/xcodeproj/scheme/launch_action.rb

@@ -62,6 +62,22 @@ def buildable_product_runnable=(runnable)
         @xml_element.add_element(runnable.xml_element) if runnable
       end
 
+      # @return [EnvironmentVariables]
+      #         Returns the EnvironmentVariables that will be defined at app launch
+      #
+      def environment_variables
+        EnvironmentVariables.new(@xml_element.elements[XCScheme::VARIABLES_NODE])
+      end
+
+      # @param [EnvironmentVariables,nil] env_vars
+      #        Sets the EnvironmentVariables that will be defined at app launch
+      #
+      def environment_variables=(env_vars)
+        @xml_element.delete_element(XCScheme::VARIABLES_NODE)
+        @xml_element.add_element(env_vars.xml_element) if env_vars
+        env_vars
+      end
+
       # @todo handle 'AdditionalOptions' tag
     end
   end

lib/xcodeproj/scheme/test_action.rb

@@ -1,4 +1,5 @@
 require 'xcodeproj/scheme/abstract_scheme_action'
+require 'xcodeproj/scheme/environment_variables'
 
 module Xcodeproj
   class XCScheme
@@ -84,6 +85,23 @@ def add_macro_expansion(macro_expansion)
         @xml_element.add_element(macro_expansion.xml_element)
       end
 
+      # @return [EnvironmentVariables]
+      #         Returns the EnvironmentVariables that will be defined at test launch
+      #
+      def environment_variables
+        EnvironmentVariables.new(@xml_element.elements[XCScheme::VARIABLES_NODE])
+      end
+
+      # @param [EnvironmentVariables,nil] env_vars
+      #        Sets the EnvironmentVariables that will be defined at test launch
+      # @return [EnvironmentVariables]
+      #
+      def environment_variables=(env_vars)
+        @xml_element.delete_element(XCScheme::VARIABLES_NODE)
+        @xml_element.add_element(env_vars.xml_element) if env_vars
+        env_vars
+      end
+
       #-------------------------------------------------------------------------#
 
       class TestableReference < XMLElementWrapper

spec/fixtures/SharedSchemes/SharedSchemes.xcodeproj/xcshareddata/xcschemes/SharedSchemes.xcscheme

@@ -38,6 +38,18 @@
             ReferencedContainer = "container:SharedSchemes.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
+      <EnvironmentVariables>
+         <EnvironmentVariable
+            key = "testkey"
+            value = "testval"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+         <EnvironmentVariable
+            key = "testkeydisabled"
+            value = "testvaldisabled"
+            isEnabled = "NO">
+         </EnvironmentVariable>
+      </EnvironmentVariables>
    </TestAction>
    <LaunchAction
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
@@ -48,7 +60,8 @@
       ignoresPersistentStateOnLaunch = "NO"
       debugDocumentVersioning = "YES"
       allowLocationSimulation = "YES">
-      <BuildableProductRunnable>
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "632143E8175736EE0038D40D"
@@ -57,6 +70,18 @@
             ReferencedContainer = "container:SharedSchemes.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
+      <EnvironmentVariables>
+         <EnvironmentVariable
+            key = "launchkey"
+            value = "launchval"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+         <EnvironmentVariable
+            key = "launchkeydisabled"
+            value = "launchvaldisabled"
+            isEnabled = "NO">
+         </EnvironmentVariable>
+      </EnvironmentVariables>
       <AdditionalOptions>
       </AdditionalOptions>
    </LaunchAction>
@@ -66,7 +91,8 @@
       useCustomWorkingDirectory = "NO"
       buildConfiguration = "Release"
       debugDocumentVersioning = "YES">
-      <BuildableProductRunnable>
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "632143E8175736EE0038D40D"

spec/plist_helper_spec.rb

@@ -87,7 +87,7 @@ def o.to_hash
 
       it 'allows hashes, strings, booleans, numbers, and arrays of hashes and strings as values' do
         hash = {
-          'hash'   => { 'a hash' => 'in a hash' },
+          'hash' => { 'a hash' => 'in a hash' },
           'string' => 'string',
           'true_bool' => '1',
           'false_bool' => '0',