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Enable colors to syntax highlight code in errors

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Reviewed By: mjesun

Differential Revision: D7110895

fbshipit-source-id: 1ec1a2147258de44fe65453e1df25afb72c2c6a4
This commit is contained in:
Christoph Nakazawa 2018-03-01 05:55:06 -08:00 committed by Facebook Github Bot
parent 59cfe85cca
commit 240711313c
4 changed files with 16 additions and 4 deletions
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10
packages/metro/src/JSTransformer/index.js
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@ -10,8 +10,9 @@
'use strict'; 'use strict';
const {Logger} = require('metro-core'); const chalk = require('chalk');
const {Logger} = require('metro-core');
const debug = require('debug')('Metro:JStransformer'); const debug = require('debug')('Metro:JStransformer');
const Worker = require('jest-worker').default; const Worker = require('jest-worker').default;
@ -150,11 +151,16 @@ module.exports = class Transformer {
/^--heap[_-]growing[_-]percent=[0-9]+$/.test(arg) || /^--heap[_-]growing[_-]percent=[0-9]+$/.test(arg) ||
/^--max[_-]old[_-]space[_-]size=[0-9]+$/.test(arg), /^--max[_-]old[_-]space[_-]size=[0-9]+$/.test(arg),
); );
const env = {
...process.env,
// Force color to print syntax highlighted code frames.
FORCE_COLOR: chalk.supportsColor ? 1 : 0,
};
return new Worker(workerPath, { return new Worker(workerPath, {
computeWorkerKey, computeWorkerKey,
exposedMethods, exposedMethods,
forkOptions: {execArgv}, forkOptions: {env, execArgv},
numWorkers, numWorkers,
}); });
} }

7
packages/metro/src/defaultTransform.js
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@ -26,7 +26,12 @@ module.exports.transform = ({filename, options, plugins, src}: Params) => {
process.env.BABEL_ENV = options.dev ? 'development' : 'production'; process.env.BABEL_ENV = options.dev ? 'development' : 'production';
try { try {
const {ast} = transformSync(src, {filename, code: false, plugins}); const {ast} = transformSync(src, {
filename,
code: false,
highlightCode: true,
plugins,
});
return {ast}; return {ast};
} finally { } finally {

2
packages/metro/src/lib/__tests__/__snapshots__/getTransformCacheKeyFn-test.js.snap
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@ -1,3 +1,3 @@
// Jest Snapshot v1, https://goo.gl/fbAQLP // Jest Snapshot v1, https://goo.gl/fbAQLP
exports[`getTransformCacheKeyFn Should return always the same key for the same params 1`] = `"ebb4289551298854bc262e46bbb58c038dc97c91"`; exports[`getTransformCacheKeyFn Should return always the same key for the same params 1`] = `"e65336d380f8bf43e00f5cd94b8bf541b1b08f5c"`;

1
packages/metro/src/transformer.js
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@ -89,6 +89,7 @@ function buildBabelConfig(filename, options, plugins?: BabelPlugins = []) {
: true, : true,
code: false, code: false,
filename, filename,
highlightCode: true,
}; };
let config = Object.assign({}, babelRC, extraConfig); let config = Object.assign({}, babelRC, extraConfig);