| 'use strict'; |
| |
| var fs = require('fs'); |
| var path = require('path'); |
| var babylon = require('babylon'); |
| var t = require('babel-types'); |
| var generate = require('babel-generator').default; |
| var traverse = require('babel-traverse').default; |
| var resolve = require('resolve'); |
| |
| var camelToDashed = require('../lib/parsers').camelToDashed; |
| |
| var basename = path.basename; |
| var dirname = path.dirname; |
| |
| var uniqueIndex = 0; |
| function getUniqueIndex() { |
| return uniqueIndex++; |
| } |
| |
| var property_files = fs.readdirSync(path.resolve(__dirname, '../lib/properties')).filter(function (property) { |
| return property.substr(-3) === '.js'; |
| }); |
| var out_file = fs.createWriteStream(path.resolve(__dirname, '../lib/properties.js'), {encoding: 'utf-8'}); |
| |
| out_file.write('\'use strict\';\n\n// autogenerated\n\n'); |
| out_file.write('/*\n *\n * http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSS2Properties\n */\n\n'); |
| |
| function isModuleDotExports(node) { |
| return ( |
| t.isMemberExpression(node, {computed: false}) && |
| t.isIdentifier(node.object, {name: 'module'}) && |
| t.isIdentifier(node.property, {name: 'exports'}) |
| ); |
| } |
| function isRequire(node, filename) { |
| if ( |
| t.isCallExpression(node) && |
| t.isIdentifier(node.callee, {name: 'require'}) && |
| node.arguments.length === 1 && |
| t.isStringLiteral(node.arguments[0]) |
| ) { |
| var relative = node.arguments[0].value; |
| var fullPath = resolve.sync(relative, {basedir: dirname(filename)}); |
| return {relative: relative, fullPath: fullPath}; |
| } else { |
| return false; |
| } |
| } |
| |
| // step 1: parse all files and figure out their dependencies |
| var parsedFilesByPath = {}; |
| property_files.map(function (property) { |
| var filename = path.resolve(__dirname, '../lib/properties/' + property); |
| var src = fs.readFileSync(filename, 'utf8'); |
| property = basename(property, '.js'); |
| var ast = babylon.parse(src); |
| var dependencies = []; |
| traverse(ast, { |
| enter(path) { |
| var r; |
| if (r = isRequire(path.node, filename)) { |
| dependencies.push(r.fullPath); |
| } |
| } |
| }); |
| parsedFilesByPath[filename] = { |
| filename: filename, |
| property: property, |
| ast: ast, |
| dependencies: dependencies, |
| }; |
| }); |
| |
| // step 2: serialize the files in an order where dependencies are always above |
| // the files they depend on |
| var externalDependencies = []; |
| var parsedFiles = []; |
| var addedFiles = {}; |
| function addFile(filename, dependencyPath) { |
| if (dependencyPath.indexOf(filename) !== -1) { |
| throw new Error( |
| 'Circular dependency: ' + |
| dependencyPath.slice(dependencyPath.indexOf(filename)).concat([filename]).join(' -> ') |
| ); |
| } |
| var file = parsedFilesByPath[filename]; |
| if (addedFiles[filename]) { |
| return; |
| } |
| if (!file) { |
| externalDependencies.push(filename); |
| } else { |
| file.dependencies.forEach(function (dependency) { |
| addFile(dependency, dependencyPath.concat([filename])); |
| }); |
| parsedFiles.push(parsedFilesByPath[filename]); |
| } |
| addedFiles[filename] = true; |
| } |
| Object.keys(parsedFilesByPath).forEach(function (filename) { |
| addFile(filename, []); |
| }); |
| // Step 3: add files to output |
| // renaming exports to local variables `moduleName_export_exportName` |
| // and updating require calls as appropriate |
| var moduleExportsByPath = {}; |
| var statements = []; |
| externalDependencies.forEach(function (filename, i) { |
| var id = t.identifier( |
| 'external_dependency_' + |
| basename(filename, '.js').replace(/[^A-Za-z]/g, '') + |
| '_' + i |
| ); |
| moduleExportsByPath[filename] = {defaultExports: id}; |
| var relativePath = path.relative(path.resolve(__dirname + '/../lib'), filename); |
| if (relativePath[0] !== '.') { |
| relativePath = './' + relativePath; |
| } |
| statements.push(t.variableDeclaration( |
| 'var', |
| [ |
| t.variableDeclarator( |
| id, |
| t.callExpression( |
| t.identifier('require'), |
| [ |
| t.stringLiteral( |
| relativePath |
| ) |
| ] |
| ) |
| ) |
| ] |
| )); |
| }); |
| function getRequireValue(node, file) { |
| var r; |
| // replace require("./foo").bar with the named export from foo |
| if ( |
| t.isMemberExpression(node, {computed: false}) && |
| (r = isRequire(node.object, file.filename)) |
| ) { |
| var e = moduleExportsByPath[r.fullPath]; |
| if (!e) { |
| return; |
| } |
| if (!e.namedExports) { |
| return t.memberExpression( |
| e.defaultExports, |
| node.property |
| ); |
| } |
| if (!e.namedExports[node.property.name]) { |
| throw new Error(r.relative + ' does not export ' + node.property.name); |
| } |
| return e.namedExports[node.property.name]; |
| |
| // replace require("./foo") with the default export of foo |
| } else if (r = isRequire(node, file.filename)) { |
| var e = moduleExportsByPath[r.fullPath]; |
| if (!e) { |
| if (/^\.\.\//.test(r.relative)) { |
| node.arguments[0].value = r.relative.substr(1); |
| } |
| return; |
| } |
| return e.defaultExports; |
| } |
| } |
| parsedFiles.forEach(function (file) { |
| var namedExports = {}; |
| var localVariableMap = {}; |
| |
| traverse(file.ast, { |
| enter(path) { |
| // replace require calls with the corresponding value |
| var r; |
| if (r = getRequireValue(path.node, file)) { |
| path.replaceWith(r); |
| return; |
| } |
| |
| // if we see `var foo = require('bar')` we can just inline the variable |
| // representing `require('bar')` wherever `foo` was used. |
| if ( |
| t.isVariableDeclaration(path.node) && |
| path.node.declarations.length === 1 && |
| t.isIdentifier(path.node.declarations[0].id) && |
| (r = getRequireValue(path.node.declarations[0].init, file)) |
| ) { |
| var newName = 'compiled_local_variable_reference_' + getUniqueIndex(); |
| path.scope.rename( |
| path.node.declarations[0].id.name, |
| newName |
| ); |
| localVariableMap[newName] = r; |
| path.remove(); |
| return; |
| } |
| |
| // rename all top level variables to keep them local to the module |
| if ( |
| t.isVariableDeclaration(path.node) && |
| t.isProgram(path.parent) |
| ) { |
| path.node.declarations.forEach(function (declaration) { |
| path.scope.rename( |
| declaration.id.name, |
| file.property + '_local_var_' + declaration.id.name |
| ); |
| }); |
| return; |
| } |
| |
| // replace module.exports.bar with a variable for the named export |
| if ( |
| t.isMemberExpression(path.node, {computed: false}) && |
| isModuleDotExports(path.node.object) |
| ) { |
| var name = path.node.property.name; |
| var identifier = t.identifier(file.property + '_export_' + name); |
| path.replaceWith(identifier); |
| namedExports[name] = identifier; |
| } |
| } |
| }); |
| traverse(file.ast, { |
| enter(path) { |
| if ( |
| t.isIdentifier(path.node) && |
| Object.prototype.hasOwnProperty.call(localVariableMap, path.node.name) |
| ) { |
| path.replaceWith(localVariableMap[path.node.name]); |
| } |
| } |
| }); |
| var defaultExports = t.objectExpression(Object.keys(namedExports).map(function (name) { |
| return t.objectProperty(t.identifier(name), namedExports[name]); |
| })); |
| moduleExportsByPath[file.filename] = { |
| namedExports: namedExports, |
| defaultExports: defaultExports |
| }; |
| statements.push(t.variableDeclaration( |
| 'var', |
| Object.keys(namedExports).map(function (name) { |
| return t.variableDeclarator(namedExports[name]); |
| }) |
| )) |
| statements.push.apply(statements, file.ast.program.body); |
| }); |
| var propertyDefinitions = []; |
| parsedFiles.forEach(function (file) { |
| var dashed = camelToDashed(file.property); |
| propertyDefinitions.push( |
| t.objectProperty( |
| t.identifier(file.property), |
| t.identifier(file.property + '_export_definition') |
| ) |
| ); |
| if (file.property !== dashed) { |
| propertyDefinitions.push( |
| t.objectProperty( |
| t.stringLiteral(dashed), |
| t.identifier(file.property + '_export_definition') |
| ) |
| ); |
| } |
| }); |
| var definePropertiesCall = t.callExpression( |
| t.memberExpression( |
| t.identifier('Object'), |
| t.identifier('defineProperties') |
| ), |
| [ |
| t.identifier('prototype'), |
| t.objectExpression( |
| propertyDefinitions |
| ) |
| ] |
| ); |
| statements.push(t.expressionStatement( |
| t.assignmentExpression( |
| '=', |
| t.memberExpression( |
| t.identifier('module'), |
| t.identifier('exports') |
| ), |
| t.functionExpression( |
| null, |
| [t.identifier('prototype')], |
| t.blockStatement([t.expressionStatement(definePropertiesCall)]) |
| ) |
| ) |
| )); |
| out_file.write(generate(t.program(statements)).code + '\n') |
| out_file.end(function (err) { |
| if (err) { |
| throw err; |
| } |
| }); |