ansible/ansible — pull request #1114 by dhozac (2012-09-27 23:08:56+00:00)
Title: Create a string parser for varReplace instead of using re

This fixes a few issues,
- ${foo}${bar} would be parsed as a variable named foo}${bar,
which wouldn't be easily fixed without breaking ${foo.${bar}}
- allows escaping . in variable parts so e.g.
${hostvars.{test.example.com}.foo} works

This is slower than using re. 3 million templating calls take about
about twice as long to complete with this compared to the regexp,
from ~65 seconds to ~115 seconds on my laptop.