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66 lines
1.8 KiB
JavaScript
66 lines
1.8 KiB
JavaScript
var astTransform = require('ast-transform');
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var astTypes = require('ast-types');
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var resolve = require('browser-resolve');
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module.exports = astTransform(function (file) {
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return function(ast, next) {
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astTypes.visit(ast, {
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visitCallExpression: function(path) {
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var node = path.value;
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if (node.callee.type !== 'Identifier'
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|| node.callee.name !== 'require'
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|| node.arguments.length < 1
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|| node.arguments[0].type !== 'Literal')
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return this.traverse(path);
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var module = node.arguments[0].value;
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var p = path;
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while (p = p.parent) {
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var parent = p.value;
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if (parent.type === 'CatchClause')
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break;
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if (parent.type === 'TryStatement') {
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try {
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resolve.sync(module, { filename: file });
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} catch (e) {
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path.replace({
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type: 'CallExpression',
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arguments: [],
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callee: {
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type: 'FunctionExpression',
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params: [],
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body: {
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type: 'BlockStatement',
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body: [{
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type: 'ThrowStatement',
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argument: {
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type: 'NewExpression',
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callee: {
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type: 'Identifier',
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name: 'Error'
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},
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arguments: [{
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type: 'Literal',
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value: e.message
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}]
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}
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}]
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}
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}
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});
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}
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break;
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}
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}
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return false;
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}
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});
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next(null, ast);
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}
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});
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