Improve error message for watch mode in CI (#1208)

Author: forresst

docs/recipes/watch-mode.md

@@ -85,7 +85,7 @@ The [`.only` modifier] disables watch mode's dependency tracking algorithm. When
 
 ## Watch mode and CI
 
-If you run AVA in your CI with watch mode, the execution will exit with a error. AVA will not run with the `--watch` (`-w`) option in CI, because CI processes should terminate, and with the `--watch` option, AVA will never terminate.
+If you run AVA in your CI with watch mode, the execution will exit with an error (`Error : Watch mode is not available in CI, as it prevents AVA from terminating.`). AVA will not run with the `--watch` (`-w`) option in CI, because CI processes should terminate, and with the `--watch` option, AVA will never terminate.
 
 ## Manually rerunning all tests
 

lib/cli.js

@@ -101,7 +101,7 @@ exports.run = () => {
 	}
 
 	if ((hasFlag('--watch') || hasFlag('-w')) && isCi) {
-		throw new Error(colors.error(figures.cross) + ' AVA will not run with the --watch (-w) option in CI, because CI processes should terminate, and with the --watch option, AVA will never terminate.');
+		throw new Error(colors.error(figures.cross) + ' Watch mode is not available in CI, as it prevents AVA from terminating.');
 	}
 
 	if (hasFlag('--require') || hasFlag('-r')) {

test/cli.js

@@ -304,7 +304,7 @@ test('bails when config contains `"tap": true` and `"watch": true`', t => {
 	test(`bails when CI is used while ${watchFlag} is given`, t => {
 		execCli([watchFlag, 'test.js'], {dirname: 'fixture/watcher', env: {CI: true}}, (err, stdout, stderr) => {
 			t.is(err.code, 1);
-			t.match(stderr, 'AVA will not run with the --watch (-w) option in CI, because CI processes should terminate, and with the --watch option, AVA will never terminate.');
+			t.match(stderr, 'Watch mode is not available in CI, as it prevents AVA from terminating.');
 			t.end();
 		});
 	});