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Assuming that acorn's dependencies have not changed, to upgrade our tree's
acorn to a new version:
1. Clone the acorn repository, and check out the version you want to upgrade
to:
$ git clone https://github.com/marijnh/acorn.git
$ cd acorn
$ git checkout <version>
2. Make sure that all tests pass:
$ npm install .
$ npm test
If there are any test failures, do not upgrade to that version of acorn!
3. Copy acorn.js to our tree:
$ cp acorn.js /path/to/mozilla-central/devtools/shared/acorn/acorn.js
4. Copy acorn_loose.js to our tree:
$ cp acorn_loose.js /path/to/mozilla-central/devtools/shared/acorn/acorn_loose.js
5. Copy util/walk.js to our tree:
$ cp util/walk.js /path/to/mozilla-central/devtools/shared/acorn/walk.js
6. Check and see if javascript pretty-printing and scratchpad work without any errors. As of version 2.6.4 we need to comment out lines in acorn_loose.js that attempt to extend the acorn object, like `acorn.parse_dammit = parse_dammit`.
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