[New] add --no-stack option to command line

will also look for SHOW_STACK environmental variable

bin/cmd.js

@@ -16,11 +16,11 @@ var regexTester = require('safe-regex-test');
 var jsFile = regexTester(/\.js$/i);
 
 var argv = minimist(process.argv.slice(2));
-var tap = faucet({
-	width: defined(argv.w, argv.width, process.stdout.isTTY
-		? process.stdout.columns - 5
-		: 0)
-});
+var opts = {
+	width: defined(argv.w, argv.width, process.stdout.isTTY ? process.stdout.columns - 5 : 0),
+	stack: defined(argv.stack, process.env.SHOW_STACK ? process.env.SHOW_STACK === 'true' : true)
+};
+var tap = faucet(opts);
 process.on('exit', function (code) {
 	if (code === 0 && tap.exitCode !== 0) {
 		process.exit(tap.exitCode);

index.js

@@ -79,7 +79,9 @@ module.exports = function (opts) {
 			test.ok = false;
 		}
 		push(out, str);
-		push(test.assertions, res);
+		if (opts.stack) {
+			push(test.assertions, res);
+		}
 	});
 
 	tap.on('extra', function (extra) {

readme.markdown

@@ -135,9 +135,10 @@ Once you've got a way to get TAP out of your tests, just pipe into `faucet`:
 
 ```
 usage:
-  faucet [FILES]
+  faucet [FILES] [--no-stack]
   command | faucet
 ```
+* the optional ```--no-stack``` argument will remove stack traces from failed test reports
 
 # license