acorn-csp - npm Package Compare versions

Comparing version 0.0.2 to 0.0.3

index.js

		@@ -5,3 +5,6 @@ #!/usr/bin/env node

		if (process.argv.length < 3) {
		var srcPath = process.argv[3] \|\| require.resolve('acorn');
		var destPath = process.argv[2];

		if (!destPath) {
		console.log('Usage: acorn-csp <path to acorn> <destination filename>');
		@@ -11,15 +14,14 @@ process.exit(1);

		Error.stackTraceLimit = 100;

		var fs = require('fs');
		var vm = require('vm');
		var srcPath = process.argv[3] \|\| require.resolve('acorn');
		var destPath = process.argv[2];
		var esprima = require('esprima');
		var recast = require('recast');
		var fs = require('fs');
		var b = recast.types.builders;

		// Read original Acorn's source with conservative parser (recast).
		var source = fs.readFileSync(srcPath, 'utf-8');
		var ast = recast.parse(source, {esprima: esprima});

		var makePredicatePath;
		// Instrument code with predicate collector.
		var makePredicatePath, makePredicateCache = {};

		@@ -30,5 +32,7 @@ recast.visit(ast, {
		if (node.id.name === 'makePredicate') {
		// Found makePredicate function, instrument it with postMessage to sandbox.
		// Found makePredicate function.
		makePredicatePath = path;
		// Rename it temporarily.
		node.id.name = '_makePredicate';
		// And provide wrapper that collects all the possible results.
		var wrapperNode = esprima.parse(
		@@ -49,4 +53,3 @@ 'function makePredicate(words) {' +

		var makePredicateCache = {};

		// Execute instrumented code and collect possible predicates.
		vm.runInNewContext(
		@@ -57,28 +60,27 @@ recast.prettyPrint(ast).code,

		makePredicatePath.get("id").node.name = 'makePredicate';
		// Remove wrapper.
		makePredicatePath.parentPath.get(makePredicatePath.name + 1).replace();

		makePredicatePath.get("body", "body").replace([{
		type: 'ReturnStatement',
		argument: {
		type: 'MemberExpression',
		object: {
		type: 'ObjectExpression',
		properties: Object.keys(makePredicateCache).map(function (key) {
		var fnNode = esprima.parse('(' + this[key] + ')').body[0].expression;
		fnNode.id = null;
		return {
		type: 'Property',
		kind: 'init',
		key: {type: 'Literal', value: key},
		value: fnNode
		};
		}, makePredicateCache)
		},
		computed: true,
		property: makePredicatePath.get("params", 0).node
		}
		}]);
		// Rename original function back.
		makePredicatePath.get('id').node.name = 'makePredicate';

		makePredicatePath.parentPath.get(makePredicatePath.name + 1).replace();
		// And generate it's body as hash of collected inputs/outputs.
		makePredicatePath.get('body', 'body').replace([b.returnStatement(
		b.memberExpression(
		b.objectExpression(Object.keys(makePredicateCache).map(function (key) {
		var funcNode = esprima.parse(makePredicateCache[key]).body[0];
		return b.property('init', b.literal(key), b.functionExpression(
		null,
		funcNode.params,
		funcNode.body
		));
		})),
		makePredicatePath.get('params', 0).node,
		true
		)
		)]);

		fs.writeFileSync(destPath, recast.print(ast).code);
		// Finally, save transformed AST to file with preserved formatting.
		fs.writeFileSync(destPath, recast.print(ast).code);

		console.log('Generated successfully!');

package.json

		{
		"name": "acorn-csp",
		"version": "0.0.2",
		"version": "0.0.3",
		"description": "Builder for Acorn that precompiles predicates in order to satisfy CSP.",
		@@ -5,0 +5,0 @@ "main": "index.js",

README.md

		acorn-csp
		=========

		Builder for Acorn that precompiles predicates in order to satisfy CSP.
		Builder for Acorn that precompiles and inlines predicates in order to satisfy Content Security Policy (CSP).

		@@ -14,4 +14,4 @@ This workaround addresses [acorn#90](https://github.com/marijnh/acorn/issues/90) and [acorn#123](https://github.com/marijnh/acorn/issues/123) issues.

		And use generated file instead of original one Acorn.
		And use generated file instead of original Acorn's `acorn.js`.

		When path to acorn is not specified, it's assumed to be available as `require('acorn')` from current directory.

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