feat: Allow suppressing of printing the report on the console

Add a "quite" flag to the task options, false by default.

Author: prantlf

Gruntfile.js

@@ -49,6 +49,9 @@ module.exports = function (grunt) {
         src: 'test/work/missing.html'
       },
       incomplete: {
+        options: {
+          quiet: true
+        },
         src: 'test/work/incomplete.html'
       },
       minimal: {

README.md

@@ -54,6 +54,10 @@ or integrate it to your build sequence in `Gruntfile.js`:
 grunt.registerTask('default', ['tidy-html5', ...]);
 ```
 
+Warnings about invalid parts of the HTML markup will be logged on the console,
+if the `quiet` mode is not enabled. If there are any, unless the task
+execution is `force`d, the task will make Grunt fail.
+
 ## Customizing
 
 Default behaviour of the task can be tweaked by the task options; these
@@ -65,6 +69,7 @@ grunt.initConfig({
     task: {
       options: {
         force: false,
+        quiet: false,
         ignoreMissing: false,
         tidyOptions: {}
       },
@@ -83,6 +88,13 @@ Default: `false`
 Suppresses reporting the failure to Grunt and thus stopping execution
 of further tasks, if set to `true`.
 
+#### quiet
+Type: `Boolean`
+Default: `false`
+
+Suppresses printing of errors and warnings about problems found in input
+files on the console. if set to `true`.
+
 #### ignoreMissing
 Type: `Boolean`
 Default: `false`

tasks/tidy-html5.js

@@ -17,10 +17,12 @@ module.exports = function (grunt) {
     const done = this.async()
     const options = this.options({
       force: false,
+      quiet: false,
       ignoreMissing: false,
       tidyOptions: {}
     })
     const force = options.force
+    const quiet = options.quiet
     const ignoreMissing = options.ignoreMissing
     const tidyOptions = options.tidyOptions
     const files = this.files
@@ -82,7 +84,9 @@ module.exports = function (grunt) {
         .then(function (result) {
           const errors = result.errlog
           if (errors.length) {
-            grunt.log.write(errors)
+            if (!quiet) {
+              grunt.log.write(errors)
+            }
             ++failed
           }
         })