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-rw-r--r--lib/expand_variables.rb15
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/expand_variables.rb b/lib/expand_variables.rb
new file mode 100644
index 00000000000..40bf9483eb5
--- /dev/null
+++ b/lib/expand_variables.rb
@@ -0,0 +1,15 @@
+String.instance_eval
+ def expand_variables(variables)
+ # Convert hash array to variables
+ if variables.is_a?(Array)
+ variables = variables.reduce({}) do |hash, variable|
+ hash[variable[:key]] = variable[:value]
+ hash
+ end
+ end
+
+ self.gsub(/\$([a-zA-Z_][a-zA-Z0-9_]*)|\${\g<1>}|%\g<1>%/) do
+ variables[$1 || $2]
+ end
+ end
+end