config: Add GetFeature, SetFeature to ConfigFile

Signed-off-by: Laura Brehm <laurabrehm@hey.com>

cli/config/configfile/file.go

@@ -351,3 +351,26 @@ func (configFile *ConfigFile) SetPluginConfig(pluginname, option, value string)
 		delete(configFile.Plugins, pluginname)
 	}
 }
+
+// GetFeature retrieves the given key from the config features map.
+func (configFile *ConfigFile) GetFeature(key string) (string, bool) {
+	if configFile.Features == nil {
+		return "", false
+	}
+	v, ok := configFile.Features[key]
+	return v, ok
+}
+
+// SetFeature sets the key to the given value in the config features map.
+// If the features field is nil, it initializes a new map.
+// Passing a value of "" will remove the key-value pair from the map.
+func (configFile *ConfigFile) SetFeature(key, value string) {
+	if configFile.Features == nil {
+		configFile.Features = make(map[string]string)
+	}
+	if value != "" {
+		configFile.Features[key] = value
+	} else {
+		delete(configFile.Features, key)
+	}
+}

cli/config/configfile/file_test.go

@@ -602,3 +602,57 @@ func TestPluginConfig(t *testing.T) {
 	assert.NilError(t, err)
 	golden.Assert(t, string(cfg), "plugin-config-2.golden")
 }
+
+func TestSetFeature(t *testing.T) {
+	t.Run("new feature", func(t *testing.T) {
+		configFile := &ConfigFile{}
+
+		configFile.SetFeature("foo", "bar")
+
+		assert.Equal(t, "bar", configFile.Features["foo"])
+	})
+
+	t.Run("update key", func(t *testing.T) {
+		configFile := &ConfigFile{}
+
+		configFile.SetFeature("foo", "bar")
+		assert.Equal(t, "bar", configFile.Features["foo"])
+
+		configFile.SetFeature("foo", "baz")
+		assert.Equal(t, "baz", configFile.Features["foo"])
+	})
+
+	t.Run("remove feature", func(t *testing.T) {
+		configFile := &ConfigFile{}
+
+		configFile.SetFeature("foo", "bar")
+		assert.Equal(t, "bar", configFile.Features["foo"])
+
+		configFile.SetFeature("foo", "")
+		_, exists := configFile.Features["foo"]
+		assert.Check(t, !exists)
+	})
+}
+
+func TestGetFeature(t *testing.T) {
+	t.Run("feature exists", func(t *testing.T) {
+		configFile := &ConfigFile{}
+		configFile.Features = map[string]string{
+			"foo": "bar",
+		}
+
+		f, ok := configFile.GetFeature("foo")
+
+		assert.Check(t, ok)
+		assert.Equal(t, "bar", f)
+	})
+
+	t.Run("missing feature", func(t *testing.T) {
+		configFile := &ConfigFile{}
+
+		f, ok := configFile.GetFeature("baz")
+
+		assert.Check(t, !ok)
+		assert.Equal(t, "", f)
+	})
+}