Add variants - close #137

build_tests/variants/default.rb

@@ -0,0 +1,8 @@
+variant "debug", default: false
+variant "release"
+
+with_variants do
+  env "prog" do |env|
+    env.Program("^/prog.exe", "prog.c")
+  end
+end

build_tests/variants/error_with_variants_with_empty_variant_group.rb

@@ -1,5 +0,0 @@
-variant_group
-variant_group
-variant "foo"
-with_variants do
-end

build_tests/variants/variant_enabled.rb

@@ -0,0 +1,14 @@
+variant "one"
+variant "two", default: false
+
+configure do
+  if variant_enabled?("one")
+    puts "one enabled"
+  end
+  if variant_enabled?("two")
+    puts "two enabled"
+  end
+  if variant_enabled?("three")
+    puts "three enabled"
+  end
+end