bin/vows, autotesting utility

bin/vows

@@ -0,0 +1,180 @@
+#!/usr/bin/env node
+
+var path   = require('path'),
+    sys    = require('sys'),
+    fs     = require('fs'),
+    exec   = require('child_process').exec,
+    Script = process.binding('evals').Script;
+
+require.paths.unshift(path.join(__dirname, '..', 'lib'));
+
+var argv = [], options = {
+    matcher: /.*/,
+    brief: false
+};
+
+//
+// Parse command-line parameters
+//
+for (var i = 0, arg; i < process.argv.length; i++) {
+    arg = process.argv[i];
+
+    if (arg === __filename) { continue }
+
+    if (arg[0] !== '-') {
+        argv.push(arg);
+    } else {
+        arg = arg.match(/^--?(.*)/)[1];
+
+        if (arg[0] === 'R') {
+            options.matcher = new(RegExp)(arg.slice(1));
+        } else if (arg in options) {
+            options[arg] = true;
+        }
+    }
+}
+
+// Get rid of process runner
+// ('node' in most cases)
+argv = argv.slice(1);
+
+var vows = require('vows').config(options);
+
+if (argv.length > 0) {
+    argv.forEach(function (arg) {
+        runTest(arg);
+    });
+} else {
+    //
+    // Watch mode
+    //
+    vows.options.brief = true;
+
+    (function () {
+        var clock = [
+            '.   ', '..  ', '... ', ' ...',
+            '  ..', '   .', '   .', '  ..',
+            '... ', '..  ', '.   '
+        ];
+        var current = 0,
+            status = 0,
+            runningTests = false,
+            statusText = '',
+            colors = ['\033[32m', '\033[33m', '\033[91m'],
+            timer = setInterval(tick, 100);
+
+        cursorHide();
+
+        // Run every 100ms
+        function tick() {
+            cursorSave();
+            eraseLine();
+            print(colors[status]);
+            print(clock[current]);    
+
+            if (runningTests) {
+                print(' \033[39mrunning tests...');
+            } else {
+                print(' ' + statusText);
+            }
+
+            print('\033[39m');
+            cursorRestore();
+            current = (current == clock.length - 1) ? 0 : current + 1;
+        }
+
+        //
+        // Utility functions
+        //
+        function print(str)      { process.stdout.write(str) }
+        function eraseLine()     { print("\033[2K") }
+        function cursorSave()    { print("\033[s") }
+        function cursorRestore() { print("\033[u") }
+        function cursorHide()    { print("\033[?25l") }
+        function cursorShow()    { print("\033[?25h") }
+        function cleanup()       { cursorShow(), print('\n') }
+
+        //
+        // Called when a file has been modified.
+        // Run the matching tests and change the status.
+        //
+        function changed(file) {
+            runningTests = true;
+            runTest("test/" + file + "-test.js").addListener('end', function (h, b, e) {
+                runningTests = false;
+                statusText = h + " honored, " +
+                             b + " broken, "  +
+                             e + " errored";
+
+                if (b || e) {
+                    eraseLine();
+                    status = e ? 2 : 1;
+                } else {
+                    status = 0;
+                }
+            });
+        }
+        //
+        // Recursively traverse a hierarchy, returning
+        // a list of all relevant .js files.
+        //
+        function paths(dir) {
+            var paths = [];
+
+            try { fs.statSync(dir) }
+            catch (e) { return [] }
+
+            (function traverse(dir, stack) {
+                stack.push(dir);
+                fs.readdirSync(stack.join('/')).forEach(function (file) {
+                    var path = stack.concat([file]).join('/'),
+                        stat = fs.statSync(path);
+
+                    if (file[0] == '.' || file === 'vendor') {
+                        return;
+                    } else if (stat.isFile() && /\.js$/.test(file)) {
+                        paths.push(path);
+                    } else if (stat.isDirectory()) {
+                        traverse(file, stack);
+                    }
+                });
+                stack.pop();
+            })(dir || '.', []);
+
+            return paths;
+        }
+
+        //
+        // Watch all relevant files in lib/ and src/,
+        // and call `changed()` on change.
+        //
+        paths('lib').concat(paths('src')).forEach(function (p) {
+            fs.watchFile(p, function (current, previous) {
+                if (new(Date)(current.mtime).valueOf() ===
+                    new(Date)(previous.mtime).valueOf()) { return }
+                else {
+                    changed(path.basename(p, '.js'));
+                }
+            });
+        });
+
+        process.addListener('exit', cleanup);
+        process.addListener('SIGINT', function () {
+            cleanup();
+            process.exit();
+        });
+        process.addListener('SIGQUIT', function () {
+            changed();
+        });
+    })();
+}
+
+function runTest(file) {
+    var code = (function (require, __filename, __dirname) {
+        /* content */
+    }).toString().replace('/* content */', fs.readFileSync(file));
+
+    return Script.runInThisContext('(' + code + ')', file)
+          .call(global, require, file, path.dirname(file));
+}
+