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71 lines
1.9 KiB
JavaScript
71 lines
1.9 KiB
JavaScript
var esprima = require('esprima-fb');
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var escodegen = require('escodegen');
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var traverse = function (node, cb) {
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if (Array.isArray(node)) {
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node.forEach(function (x) {
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if(x != null) {
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x.parent = node;
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traverse(x, cb);
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}
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});
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}
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else if (node && typeof node === 'object') {
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cb(node);
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Object.keys(node).forEach(function (key) {
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if (key === 'parent' || !node[key]) return;
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node[key].parent = node;
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traverse(node[key], cb);
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});
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}
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};
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var walk = function (src, opts, cb) {
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var ast = esprima.parse(src, opts);
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traverse(ast, cb);
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};
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var exports = module.exports = function (src, opts) {
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return exports.find(src, opts).strings;
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};
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exports.find = function (src, opts) {
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if (!opts) opts = {};
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opts.parse = opts.parse || {};
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opts.parse.tolerant = true;
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var word = opts.word === undefined ? 'require' : opts.word;
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if (typeof src !== 'string') src = String(src);
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src = src.replace(/^#![^\n]*\n/, '');
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var isRequire = opts.isRequire || function (node) {
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var c = node.callee;
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return c
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&& node.type === 'CallExpression'
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&& c.type === 'Identifier'
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&& c.name === word
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;
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}
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var modules = { strings : [], expressions : [] };
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if (opts.nodes) modules.nodes = [];
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if (src.indexOf(word) == -1) return modules;
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walk(src, opts.parse, function (node) {
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if (!isRequire(node)) return;
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if (node.arguments.length) {
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if (node.arguments[0].type === 'Literal') {
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modules.strings.push(node.arguments[0].value);
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}
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else {
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modules.expressions.push(escodegen.generate(node.arguments[0]));
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}
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}
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if (opts.nodes) modules.nodes.push(node);
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});
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return modules;
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};
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