[#3896bk] Better support for XML documents

parser/helpers.go

@@ -21,6 +21,17 @@ import (
 // it is common to see variables such as "{{config.docker.interface}}"
 var configMatchRegex = regexp.MustCompile(`{{\s?config\.([\w.-]+)\s?}}`)
 
+// Regex to support modifying XML inline variable data using the config tools. This means
+// you can pass a replacement of Root.Property='[value="testing"]' to get an XML node
+// matching:
+//
+// <Root>
+//   <Property value="testing"/>
+// </Root>
+//
+// noinspection RegExpRedundantEscape
+var xmlValueMatchRegex = regexp.MustCompile(`^\[([\w]+)='(.*)'\]$`)
+
 // Gets the []byte representation of a configuration file to be passed through to other
 // handler functions. If the file does not currently exist, it will be created.
 func readFileBytes(path string) ([]byte, error) {

parser/parser.go

@@ -162,9 +162,16 @@ func (f *ConfigurationFile) parseXmlFile(path string) error {
 
 		// Iterate over the elements we found and update their values.
 		for _, element := range doc.FindElements(path) {
+			if xmlValueMatchRegex.Match(value) {
+				k := xmlValueMatchRegex.ReplaceAllString(string(value), "$1")
+				v := xmlValueMatchRegex.ReplaceAllString(string(value), "$2")
+
+				element.CreateAttr(k, v)
+			} else {
 				element.SetText(string(value))
 			}
 		}
+	}
 
 	// If you don't truncate the file you'll end up duplicating the data in there (or just appending
 	// to the end of the file. We don't want to do that.