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Move buildRegExps from react-native to metro-babel-register

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Summary: Moves the `buildRegExps` function from `react-native` to `metro-babel-register`. This way, it is easier to reuse, and we can remove FB-specific logic from React Native.

Reviewed By: jeanlauliac, mjesun

Differential Revision: D7727483

fbshipit-source-id: 0f7773ff044033c465f0712c523a0aef61bf8444
This commit is contained in:
David Aurelio 2018-04-23 13:37:19 -07:00 committed by Facebook Github Bot
parent 05b75b9ebf
commit f80000b9e7
2 changed files with 3 additions and 40 deletions
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2
package.json
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@ -167,7 +167,7 @@
"inquirer": "^3.0.6",
"lodash": "^4.17.5",
"metro": "^0.34.0",
"metro-babel-register": "^0.34.1",
"metro-babel-register": "^0.34.2",
"metro-core": "^0.34.0",
"mime": "^1.3.4",
"minimist": "^1.2.0",

41
setupBabel.js
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@ -8,43 +8,8 @@
'use strict';
const babelRegisterOnly = require('metro-babel-register');
const escapeRegExp = require('lodash/escapeRegExp');
const path = require('path');
const BABEL_ENABLED_PATHS = ['local-cli', 'metro'];
/**
* We use absolute paths for matching only the top-level folders reliably. For
* example, we would not want to match some deeply nested forder that happens to
* have the same name as one of `BABEL_ENABLED_PATHS`.
*/
function buildRegExps(basePath, dirPaths) {
return dirPaths.map(
folderPath =>
folderPath === 'metro'
// metro uses flow (for example) which needs to be stripped out w/babel.
// it'll resolve to .../metro/src/index.js we want root
? path.resolve(require.resolve('metro'), '..')
// Babel `only` option works with forward slashes in the RegExp so replace
// backslashes for Windows.
: folderPath instanceof RegExp
? new RegExp(
`^${escapeRegExp(
path.resolve(basePath, '.').replace(/\\/g, '/')
)}/${folderPath.source}`,
folderPath.flags
)
: new RegExp(
`^${escapeRegExp(
path.resolve(basePath, folderPath).replace(/\\/g, '/')
)}`
)
);
}
function getOnlyList() {
return buildRegExps(__dirname, BABEL_ENABLED_PATHS);
}
const BABEL_ENABLED_PATHS = ['local-cli'];
/**
* Centralized place to register all the directories that need a Babel
@ -52,9 +17,7 @@ function getOnlyList() {
* support Flow type annotations.
*/
function setupBabel() {
babelRegisterOnly(getOnlyList());
babelRegisterOnly(babelRegisterOnly.buildRegExps(__dirname, BABEL_ENABLED_PATHS));
}
setupBabel.buildRegExps = buildRegExps;
setupBabel.getOnlyList = getOnlyList;
module.exports = setupBabel;