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Update Flow instructions #567

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Sep 3, 2016
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Update Flow instructions #567

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35 changes: 2 additions & 33 deletions template/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -376,48 +376,17 @@ node_modules/fbjs/lib/Deferred.js.flow:60
node_modules/fbjs/lib/shallowEqual.js.flow:29
29: return x !== 0 || 1 / (x: $FlowIssue) === 1 / (y: $FlowIssue);
^^^^^^^^^^ identifier `$FlowIssue`. Could not resolve name

src/App.js:3
3: import logo from './logo.svg';
^^^^^^^^^^^^ ./logo.svg. Required module not found

src/App.js:4
4: import './App.css';
^^^^^^^^^^^ ./App.css. Required module not found

src/index.js:5
5: import './index.css';
^^^^^^^^^^^^^ ./index.css. Required module not found
```

To fix this, change your `.flowconfig` to look like this:

```ini
[libs]
./node_modules/fbjs/flow/lib

[options]
esproposal.class_static_fields=enable
esproposal.class_instance_fields=enable

module.name_mapper='^\(.*\)\.css$' -> 'react-scripts/config/flow/css'
module.name_mapper='^\(.*\)\.\(jpg\|png\|gif\|eot\|otf\|webp\|svg\|ttf\|woff\|woff2\|mp4\|webm\)$' -> 'react-scripts/config/flow/file'

suppress_type=$FlowIssue
suppress_type=$FlowFixMe
[ignore]
<PROJECT_ROOT>/node_modules/fbjs/.*
```

Re-run flow, and you shouldn’t get any extra issues.

If you later `eject`, you’ll need to replace `react-scripts` references with the `<PROJECT_ROOT>` placeholder, for example:

```ini
module.name_mapper='^\(.*\)\.css$' -> '<PROJECT_ROOT>/config/flow/css'
module.name_mapper='^\(.*\)\.\(jpg\|png\|gif\|eot\|otf\|webp\|svg\|ttf\|woff\|woff2\|mp4\|webm\)$' -> '<PROJECT_ROOT>/config/flow/file'
```

We will consider integrating more tightly with Flow in the future so that you don’t have to do this.

## Adding Custom Environment Variables

>Note: this feature is available with `[email protected]` and higher.
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