81 lines
2.6 KiB
JavaScript
81 lines
2.6 KiB
JavaScript
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var acorn = require('acorn-node');
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var walk = require('acorn-node/walk');
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var defined = require('defined');
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var requireRe = /\brequire\b/;
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function parse (src, opts) {
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if (!opts) opts = {};
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var acornOpts = {
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ranges: defined(opts.ranges, opts.range),
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locations: defined(opts.locations, opts.loc),
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allowReserved: defined(opts.allowReserved, true),
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allowImportExportEverywhere: defined(opts.allowImportExportEverywhere, false)
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};
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// Use acorn-node's defaults for the rest.
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if (opts.ecmaVersion != null) acornOpts.ecmaVersion = opts.ecmaVersion;
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if (opts.sourceType != null) acornOpts.sourceType = opts.sourceType;
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if (opts.allowHashBang != null) acornOpts.allowHashBang = opts.allowHashBang;
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if (opts.allowReturnOutsideFunction != null) acornOpts.allowReturnOutsideFunction = opts.allowReturnOutsideFunction;
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return acorn.parse(src, acornOpts);
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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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var word = opts.word === undefined ? 'require' : opts.word;
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if (typeof src !== 'string') src = String(src);
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var isRequire = opts.isRequire || function (node) {
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return node.callee.type === 'Identifier'
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&& node.callee.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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var wordRe = word === 'require' ? requireRe : RegExp('\\b' + word + '\\b');
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if (!wordRe.test(src)) return modules;
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var ast = parse(src, opts.parse);
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function visit(node, st, c) {
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var hasRequire = wordRe.test(src.slice(node.start, node.end));
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if (!hasRequire) return;
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walk.base[node.type](node, st, c);
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if (node.type !== 'CallExpression') return;
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if (isRequire(node)) {
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if (node.arguments.length) {
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var arg = node.arguments[0];
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if (arg.type === 'Literal') {
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modules.strings.push(arg.value);
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}
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else if (arg.type === 'TemplateLiteral'
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&& arg.quasis.length === 1
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&& arg.expressions.length === 0) {
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modules.strings.push(arg.quasis[0].value.raw);
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}
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else {
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modules.expressions.push(src.slice(arg.start, arg.end));
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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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}
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walk.recursive(ast, null, {
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Statement: visit,
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Expression: visit
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});
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return modules;
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};
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