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| 'use strict';
const atob = require('atob');
const chalk = require('chalk');
const babel = require('babel-core');
const browserify = require('browserify');
const babelify = require('babelify');
const es2015 = require('babel-preset-es2015');
const react = require('babel-preset-react');
const babili = require('babel-preset-babili');
const flowStripTypes = require('babel-plugin-transform-flow-strip-types');
const flowSyntax = require('babel-plugin-syntax-flow');
const CLIEngine = require('eslint').CLIEngine;
const ESLINT_SEVERITY = {
'1': chalk.yellow('warning'),
'2': chalk.red('error')
};
const sourceMapPattern = /\/\/# sourceMappingURL=data:application\/json;charset=utf-8;base64,(.*)/;
const sourceMapPatternMatchIndex = 1;
const OPTION_DEFAULTS = {
'bundle': false,
'minify': false,
'output': null,
'sourcemap': false
};
const PRESET_DEFAULTS = [es2015, react];
/**
* Transforms a file with babel.
*
* @example spire.transformFileWithBabel(file).then(function (result) { console.log(result); });
* @param {String} file File path.
* @param {Object} [options] Options object.
* @param {Boolean} [options.sourcemap] Generate sourcemap.
* @return {Object} Promise
* @public
*/
const transformFileWithBabel = (file, options) => new Promise((resolve, reject) => {
const settings = Object.assign({}, OPTION_DEFAULTS, options);
let sourceMaps = true;
if (settings.sourcemap && !settings.output) {
sourceMaps = 'inline';
}
const presets = PRESET_DEFAULTS.slice();
if (settings.minify) {
presets.push(babili);
}
babel.transformFile(file, {
'plugins': [flowSyntax, flowStripTypes],
presets,
sourceMaps
}, (err, result) => {
if (err) {
return reject(new Error(err));
}
let code = `${result.code.trim()}\n`;
let map = null;
if (settings.sourcemap) {
map = `${JSON.stringify(result.map)}\n`;
if (settings.output) {
code = `${code}//# sourceMappingURL=${settings.output}.map\n`;
}
}
return resolve({
code,
map
});
});
});
/**
* Transforms a file with browserify.
*
* @example spire.transformFileWithBrowserify(file).then(function (result) { console.log(result); });
* @param {String} file File path.
* @param {Object} [options] Options object.
* @param {Boolean} [options.sourcemap] Generate sourcemap.
* @return {Object} Promise
* @public
*/
const transformFileWithBrowserify = (file, options) => new Promise((resolve, reject) => {
const settings = Object.assign({}, OPTION_DEFAULTS, options);
const debug = settings.sourcemap;
const presets = PRESET_DEFAULTS.slice();
if (settings.minify) {
presets.push(babili);
}
browserify(file, {debug})
.transform(babelify, {
'plugins': [flowSyntax, flowStripTypes],
presets
})
.bundle((err, buffer) => {
if (err) {
return reject(new Error(err));
}
let code = `${buffer.toString().trim()}\n`;
let map = null;
if (settings.sourcemap) {
map = atob(sourceMapPattern.exec(code)[sourceMapPatternMatchIndex]);
if (settings.output) {
code = code.replace(
sourceMapPattern,
`//# sourceMappingURL=${settings.output}.map\n`
);
}
}
return resolve({
code,
map
});
});
});
/**
* Transforms a file.
*
* @example spire.transformFile(file, options).then(function (result) { console.log(result); });
* @param {String} file File path.
* @param {Object} [options] Options object.
* @param {Boolean} [options.bundle] Use browserify bundler.
* @param {Boolean} [options.sourcemap] Generate sourcemap.
* @return {Object} Promise
* @public
*/
const transformFile = (file, options) => {
const settings = Object.assign({}, OPTION_DEFAULTS, options);
if (settings.bundle) {
return transformFileWithBrowserify(file, options);
}
return transformFileWithBabel(file, options);
};
/**
* Lint a file.
*
* @example spire.lintFile(file, configFile).then(function (results) { console.log(results); });
* @param {String} file File path.
* @param {String} configFile Config file.
* @return {Object} Promise
* @public
*/
const lintFile = (file, configFile) => new Promise((resolve, reject) => {
const cli = new CLIEngine({
configFile
});
const report = cli.executeOnFiles([file]);
const warningAndErrorCount = report.results.reduce((prev, curr) =>
prev + curr.warningCount + curr.errorCount
, 0);
if (warningAndErrorCount) {
const errorMessages = report.results.reduce((prev, curr) => {
Eif (curr.messages.length) {
prev.push(`\n${chalk.underline(curr.filePath)}\n${
curr.messages.map(message => {
const pos = `${message.line}:${message.column}`;
return ` ${chalk.grey(pos)} ` +
`${ESLINT_SEVERITY[message.severity]}\t ` +
`${message.message}\t ${chalk.grey(message.ruleId)}`;
}).join('\n')}`);
}
return prev;
}, []).join('\n');
reject(errorMessages);
} else {
resolve();
}
});
module.exports = {
lintFile,
transformFile,
transformFileWithBabel,
transformFileWithBrowserify
};
|