Flow files no longer have `source.js` scope, snippets broken

[IanVS]

Prerequisites

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Description

Moved from atom/atom#18398.

When using the flow pragma in a file, all of my existing javascript snippets no longer work. I notice that the scope in these files no loner include source.js, which is what my snippets are expecting. Do I now need to duplicate all my snippets for both scopes, so I can work in files with and without flow? Do I need to recreate "built-in" snippets like log?

Steps to Reproduce

1. Add // @flow to the top of a file
2. Save the file, close, and reopen
3. Notice that you can no longer type log and tab, and get console.log();

Expected behavior: [What you expect to happen]

Javascript snippets work in flow files.

Actual behavior: [What actually happens]

They don't.

Reproduces how often: [What percentage of the time does it reproduce?]

100%

Versions

Atom    : 1.33.0-beta1
Electron: 2.0.11
Chrome  : 61.0.3163.100
Node    : 8.9.3

apm  2.1.2
npm  6.2.0
node 8.9.3 x64
atom 1.33.0-beta1
python 2.7.10
git 2.19.1

Additional Information

[gwing33]

This was quite frustrating as I couldn't figure out where this "Flow JavaScript" was coming from.

Once I found out it was related to this library, I was finally able to determine that I can add .source.flow to my snippets, to get them working again. While I'm at it, might as well add .ts.

'.source.js, .source.jsx, .source.flow':

[rsese]

Thanks for the report @IanVS - confirmed on macOS 10.12.6 with 1.34.0-nightly10.