michael@0: Assuming that acorn's dependencies have not changed, to upgrade our tree's
michael@0: acorn to a new version:
michael@0: 
michael@0: 1. Clone the acorn repository, and check out the version you want to upgrade
michael@0: to:
michael@0: 
michael@0:        $ git clone https://github.com/marijnh/acorn.git
michael@0:        $ cd acorn
michael@0:        $ git checkout <version>
michael@0: 
michael@0: 2. Make sure that all tests pass:
michael@0: 
michael@0:        $ npm install .
michael@0:        $ npm test
michael@0: 
michael@0:    If there are any test failures, do not upgrade to that version of acorn!
michael@0: 
michael@0: 3. Copy acorn.js to our tree:
michael@0: 
michael@0:        $ cp acorn.js /path/to/mozilla-central/toolkit/devtools/acorn/acorn.js
michael@0: 
michael@0: 4. Copy acorn_loose.js to our tree:
michael@0: 
michael@0:        $ cp acorn_loose.js /path/to/mozilla-central/toolkit/devtools/acorn/acorn_loose.js
michael@0: 
michael@0: 5. Copy util/walk.js to our tree:
michael@0: 
michael@0:        $ cp util/walk.js /path/to/mozilla-central/toolkit/devtools/acorn/walk.js