100 lines
3.7 KiB
JavaScript
100 lines
3.7 KiB
JavaScript
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/**
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* @fileoverview Utility to translate test files to CommonJS imports.
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*
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* This is a somewhat hacky tool designed to do one very specific thing.
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* All of the test files in *_test.js are written with Closure-style
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* imports (goog.require()). This works great for running the tests
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* against Closure-style generated code, but we also want to run the
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* tests against CommonJS-style generated code without having to fork
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* the tests.
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*
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* Closure-style imports import each individual type by name. This is
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* very different than CommonJS imports which are by file. So we put
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* special comments in these tests like:
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*
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* // CommonJS-LoadFromFile: test_pb
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* goog.require('proto.jspb.test.CloneExtension');
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* goog.require('proto.jspb.test.Complex');
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* goog.require('proto.jspb.test.DefaultValues');
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*
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* This script parses that special comment and uses it to generate proper
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* CommonJS require() statements so that the tests can run and pass using
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* CommonJS imports. The script will change the above statements into:
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*
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* var test_pb = require('test_pb');
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* googleProtobuf.exportSymbol('proto.jspb.test.CloneExtension', test_pb.CloneExtension, global);
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* googleProtobuf.exportSymbol('proto.jspb.test.Complex', test_pb.Complex, global);
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* googleProtobuf.exportSymbol('proto.jspb.test.DefaultValues', test_pb.DefaultValues, global);
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*
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* (The "exportSymbol" function will define the given names in the global
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* namespace, taking care not to overwrite any previous value for
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* "proto.jspb.test").
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*/
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var lineReader = require('readline').createInterface({
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input: process.stdin,
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output: process.stdout
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});
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function tryStripPrefix(str, prefix) {
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if (str.lastIndexOf(prefix) !== 0) {
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throw "String: " + str + " didn't start with: " + prefix;
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}
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return str.substr(prefix.length);
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}
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function camelCase(str) {
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var ret = '';
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var ucaseNext = false;
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for (var i = 0; i < str.length; i++) {
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if (str[i] == '-') {
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ucaseNext = true;
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} else if (ucaseNext) {
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ret += str[i].toUpperCase();
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ucaseNext = false;
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} else {
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ret += str[i];
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}
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}
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return ret;
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}
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var module = null;
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var pkg = null;
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// Header: goes in every file at the top.
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console.log("var global = Function('return this')();");
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console.log("var googleProtobuf = require('google-protobuf');");
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console.log("var testdeps = require('testdeps_commonjs');");
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console.log("global.goog = testdeps.goog;");
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console.log("global.jspb = testdeps.jspb;");
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console.log("var asserts = require('closure_asserts_commonjs');");
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console.log("");
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console.log("// Bring asserts into the global namespace.");
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console.log("googleProtobuf.object.extend(global, asserts);");
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lineReader.on('line', function(line) {
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var isRequire = line.match(/goog\.require\('([^']*)'\)/);
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var isLoadFromFile = line.match(/CommonJS-LoadFromFile: (\S*) (.*)/);
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var isSetTestOnly = line.match(/goog.setTestOnly()/);
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if (isRequire) {
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if (module) { // Skip goog.require() lines before the first directive.
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var fullSym = isRequire[1];
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// Skip lines importing from jspb.*, these are handled by the header above.
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if (fullSym.match(/^jspb\./)) return;
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var sym = tryStripPrefix(fullSym, pkg);
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console.log("googleProtobuf.exportSymbol('" + fullSym + "', " + module + sym + ', global);');
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}
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} else if (isLoadFromFile) {
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var module_path = isLoadFromFile[1].split('/');
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module = camelCase(module_path[module_path.length - 1]);
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pkg = isLoadFromFile[2];
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if (module != "googleProtobuf") { // We unconditionally require this in the header.
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console.log("var " + module + " = require('./" + isLoadFromFile[1] + "');");
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}
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} else if (!isSetTestOnly) { // Remove goog.setTestOnly() lines.
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console.log(line);
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}
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});
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