78 lines
2.2 KiB
JavaScript
78 lines
2.2 KiB
JavaScript
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'use strict';
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var IMPORT_RE = /(\bimport\s+(?:[^'"]+\s+from\s+)??)(['"])([^'"]+)(\2)/g;
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var EXPORT_RE = /(\bexport\s+(?:[^'"]+\s+from\s+)??)(['"])([^'"]+)(\2)/g;
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var REQUIRE_RE = /(\brequire\s*?\(\s*?)(['"])([^'"]+)(\2\s*?\))/g;
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/**
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* Extract all required modules from a `code` string.
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*/
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var blockCommentRe = /\/\*(.|\n)*?\*\//g;
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var lineCommentRe = /\/\/.+(\n|$)/g;
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// from react-native packager
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function findAll(code) {
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var deps = [];
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code.replace(blockCommentRe, '').replace(lineCommentRe, '')
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// Parse the sync dependencies this module has. When the module is
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// required, all it's sync dependencies will be loaded into memory.
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// Sync dependencies can be defined either using `require` or the ES6
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// `import` or `export` syntaxes:
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// const dep1 = require('dep1');
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.replace(IMPORT_RE, function (match, pre, quot, dep, post) {
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deps.push(dep);
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return match;
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}).replace(EXPORT_RE, function (match, pre, quot, dep, post) {
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deps.push(dep);
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return match;
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}).replace(REQUIRE_RE, function (match, pre, quot, dep, post) {
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deps.push(dep);
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return match;
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});
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return deps;
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}
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function replaceAll(code, replacer) {
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function doIt(_match, pre, quot, dep, post) {
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return '' + pre + quot + replacer(dep) + post;
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}
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return code.replace(blockCommentRe, '').replace(lineCommentRe, '').replace(IMPORT_RE, doIt).replace(EXPORT_RE, doIt).replace(REQUIRE_RE, doIt);
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}
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function splitPackageName(moduleName) {
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var index = moduleName.indexOf('/');
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if (index !== -1) {
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// support domain package
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// require('@ali/matrix')
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if (moduleName.charAt(0) === '@') {
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index = moduleName.indexOf('/', index + 1);
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}
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}
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if (index !== -1) {
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return {
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packageName: moduleName.slice(0, index),
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suffix: moduleName.slice(index)
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};
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} else {
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return {
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packageName: moduleName,
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suffix: ''
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};
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}
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}
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function startsWith(str, prefix) {
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return str.slice(0, prefix.length) === prefix;
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}
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module.exports = {
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findAll: findAll,
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replaceAll: replaceAll,
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findAllImports: findAll,
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splitPackageName: splitPackageName,
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isRelativeModule: function isRelativeModule(dep) {
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return startsWith(dep, './') || startsWith(dep, '../');
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}
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};
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