vue hello world项目
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3 years ago
'use strict';
const path = require('path');
const Module = require('module');
const fs = require('fs');
const resolveFrom = (fromDir, moduleId, silent) => {
if (typeof fromDir !== 'string') {
throw new TypeError(`Expected \`fromDir\` to be of type \`string\`, got \`${typeof fromDir}\``);
}
if (typeof moduleId !== 'string') {
throw new TypeError(`Expected \`moduleId\` to be of type \`string\`, got \`${typeof moduleId}\``);
}
try {
fromDir = fs.realpathSync(fromDir);
} catch (err) {
if (err.code === 'ENOENT') {
fromDir = path.resolve(fromDir);
} else if (silent) {
return null;
} else {
throw err;
}
}
const fromFile = path.join(fromDir, 'noop.js');
const resolveFileName = () => Module._resolveFilename(moduleId, {
id: fromFile,
filename: fromFile,
paths: Module._nodeModulePaths(fromDir)
});
if (silent) {
try {
return resolveFileName();
} catch (err) {
return null;
}
}
return resolveFileName();
};
module.exports = (fromDir, moduleId) => resolveFrom(fromDir, moduleId);
module.exports.silent = (fromDir, moduleId) => resolveFrom(fromDir, moduleId, true);