dylants · October 28, 2014 20:03 · Oct 28, 2014
diff --git a/logger.js b/logger.js
@@ -0,0 +1,59 @@
+"use strict";
+
+var debug = require("debug");
+
+// enable the "myApp" namespace by default
+debug.enable("myApp*");
+
+// returns the calling filename, but prepended with "myApp:"
+function _getDecorator() {
+    // the code below screws up test output when a test fails,
+    // so in the test environment, set this to return a constant
+    // string rather than determining the decorator via stack trace.
+    if (process.env.NODE_ENV === "test") {
+        return "myApp:test_environment";
+    }
+
+    try {
+        var err = new Error();
+        var callerfile;
+        var currentfile;
+
+        Error.prepareStackTrace = function(err, stack) {
+            return stack;
+        };
+
+        currentfile = err.stack.shift().getFileName();
+
+        while (err.stack.length) {
+            callerfile = err.stack.shift().getFileName();
+
+            if (currentfile !== callerfile) {
+                // trim the file to the file name itself (minus the .js)
+                callerfile = callerfile.slice(callerfile.lastIndexOf("/") + 1, callerfile.indexOf(".js"));
+                // prepend the project name
+                return "myApp:" + callerfile;
+            }
+        }
+    } catch (err) {}
+    return undefined;
+}
+
+function logger() {
+    var decorator, log, error;
+
+    // get the filename which is used to decorate the debug module
+    decorator = _getDecorator();
+
+    // setup two debug'ers, one for console.log and one for console.error
+    log = debug(decorator);
+    error = debug(decorator);
+    error.log = console.error.bind(console);
+
+    // return the two under the log and error functions
+    return {
+        log: log,
+        error: error
+    };
+}
+module.exports = logger;
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