Add silent option (#331)

index.js

@@ -39,6 +39,7 @@ module.exports = (plugins, options) => {
 
 	options = {
 		// TODO: Remove this when Gulp gets a real logger with levels
+		silent: process.argv.includes('--silent'),
 		verbose: process.argv.includes('--verbose'),
 		...options
 	};
@@ -102,14 +103,17 @@ module.exports = (plugins, options) => {
 			}
 		})();
 	}, callback => {
-		const percent = totalBytes > 0 ? (totalSavedBytes / totalBytes) * 100 : 0;
-		let msg = `Minified ${totalFiles} ${plur('image', totalFiles)}`;
+		if (!options.silent) {
+			const percent = totalBytes > 0 ? (totalSavedBytes / totalBytes) * 100 : 0;
+			let msg = `Minified ${totalFiles} ${plur('image', totalFiles)}`;
 
-		if (totalFiles > 0) {
-			msg += chalk.gray(` (saved ${prettyBytes(totalSavedBytes)} - ${percent.toFixed(1).replace(/\.0$/, '')}%)`);
+			if (totalFiles > 0) {
+				msg += chalk.gray(` (saved ${prettyBytes(totalSavedBytes)} - ${percent.toFixed(1).replace(/\.0$/, '')}%)`);
+			}
+
+			log(`${PLUGIN_NAME}:`, msg);
 		}
 
-		log(`${PLUGIN_NAME}:`, msg);
 		callback();
 	});
 };

readme.md

@@ -118,3 +118,12 @@ Enabling this will log info on every image passed to `gulp-imagemin`:
 gulp-imagemin: ✔ image1.png (already optimized)
 gulp-imagemin: ✔ image2.png (saved 91 B - 0.4%)
 ```
+
+##### silent
+
+Type: `boolean`<br>
+Default: `false`
+
+Don't log the number of images that have been minified.
+
+You can also enable this from the command-line with the `--silent` flag if the option is not already specified.