diff --git a/.eslintignore b/.eslintignore
deleted file mode 100644
index 1dbc3b75de8..00000000000
--- a/.eslintignore
+++ /dev/null
@@ -1,95 +0,0 @@
-# Generated by "grunt ignorefiles"
-!/.grunt
-*/**/yui/src/*/meta/
-*/**/build/
-node_modules/
-vendor/
-admin/tool/policy/amd/src/jquery-eu-cookie-law-popup.js
-auth/cas/CAS/
-cache/stores/mongodb/MongoDB/
-enrol/lti/ims-blti/
-filter/algebra/AlgParser.pm
-filter/tex/mimetex.*
-h5p/h5plib/v124/joubel/core/
-h5p/h5plib/v124/joubel/editor/
-lib/editor/atto/plugins/html/yui/src/codemirror/
-lib/editor/atto/plugins/html/yui/src/beautify/
-lib/editor/atto/yui/src/rangy/js/*.*
-lib/editor/tinymce/plugins/pdw/tinymce/
-lib/editor/tinymce/plugins/spellchecker/rpc.php
-lib/editor/tinymce/tiny_mce/
-lib/mlbackend/php/phpml/
-lib/adodb/
-lib/behat/axe/
-lib/bennu/
-lib/evalmath/
-lib/phpspreadsheet/
-lib/google/
-lib/htmlpurifier/
-lib/jabber/
-lib/minify/matthiasmullie-minify/
-lib/minify/matthiasmullie-pathconverter/
-lib/pear/HTML/Common.php
-lib/pear/HTML/QuickForm.php
-lib/pear/HTML/QuickForm/
-lib/pear/PEAR.php
-lib/phpmailer/
-lib/simplepie/
-lib/tcpdf/
-lib/yuilib/
-lib/yuilib/gallery/
-lib/jquery/
-lib/html2text/
-lib/markdown/
-lib/xhprof/
-lib/horde/
-lib/requirejs/
-lib/amd/src/loglevel.js
-lib/mustache/
-lib/amd/src/mustache.js
-lib/graphlib.php
-lib/php-css-parser/
-lib/rtlcss/
-lib/scssphp/
-lib/spout/
-lib/amd/src/chartjs-lazy.js
-lib/maxmind/GeoIp2/
-lib/maxmind/MaxMind/
-lib/ltiprovider/
-lib/amd/src/truncate.js
-lib/fonts/
-lib/amd/src/adapter.js
-lib/validateurlsyntax.php
-lib/amd/src/popper.js
-lib/geopattern-php/
-lib/php-jwt/
-lib/babel-polyfill/
-lib/polyfills/
-lib/emoji-data/
-lib/plist/
-lib/zipstream/
-lib/php-enum/
-lib/http-message/
-media/player/videojs/amd/src/video-lazy.js
-media/player/videojs/amd/src/Youtube-lazy.js
-media/player/videojs/videojs/
-media/player/videojs/amd/src/videojs-flash-lazy.js
-media/player/videojs/videojs/video-js.swf
-mod/assign/feedback/editpdf/fpdi/
-repository/s3/S3.php
-theme/boost/scss/bootstrap/
-theme/boost/amd/src/bootstrap/alert.js
-theme/boost/amd/src/bootstrap/button.js
-theme/boost/amd/src/bootstrap/carousel.js
-theme/boost/amd/src/bootstrap/collapse.js
-theme/boost/amd/src/bootstrap/dropdown.js
-theme/boost/amd/src/bootstrap/modal.js
-theme/boost/amd/src/bootstrap/popover.js
-theme/boost/amd/src/bootstrap/tools/sanitizer.js
-theme/boost/amd/src/bootstrap/scrollspy.js
-theme/boost/amd/src/bootstrap/tab.js
-theme/boost/amd/src/bootstrap/toast.js
-theme/boost/amd/src/bootstrap/tooltip.js
-theme/boost/amd/src/bootstrap/util.js
-theme/boost/amd/src/index.js
-theme/boost/scss/fontawesome/
diff --git a/.gitignore b/.gitignore
index de656302dbb..79f48790b10 100644
--- a/.gitignore
+++ b/.gitignore
@@ -48,3 +48,5 @@ atlassian-ide-plugin.xml
 /node_modules/
 /.vscode/
 moodle-plugin-ci.phar
+.eslintignore
+.stylelintignore
diff --git a/.grunt/tasks/javascript.js b/.grunt/tasks/javascript.js
index 4cc309ca6a6..5e511be473e 100644
--- a/.grunt/tasks/javascript.js
+++ b/.grunt/tasks/javascript.js
@@ -37,6 +37,9 @@ const babelRename = function(destPath, srcPath) {
 };
 
 module.exports = grunt => {
+    // Load the Ignorefiles tasks.
+    require('./ignorefiles')(grunt);
+
     // Load the Shifter tasks.
     require('./shifter')(grunt);
 
@@ -47,7 +50,7 @@ module.exports = grunt => {
 
     // Register JS tasks.
     grunt.registerTask('yui', ['eslint:yui', 'shifter']);
-    grunt.registerTask('amd', ['eslint:amd', 'babel']);
+    grunt.registerTask('amd', ['ignorefiles', 'eslint:amd', 'babel']);
     grunt.registerTask('js', ['amd', 'yui']);
 
     // Register NPM tasks.
diff --git a/.grunt/tasks/style.js b/.grunt/tasks/style.js
index 05f713c32bd..e468d6d801d 100644
--- a/.grunt/tasks/style.js
+++ b/.grunt/tasks/style.js
@@ -21,6 +21,9 @@
  */
 
 module.exports = grunt => {
+    // Load the ignorefiles tasks.
+    require('./ignorefiles')(grunt);
+
     // Load the Style Lint tasks.
     require('./stylelint')(grunt);
 
diff --git a/.grunt/tasks/stylelint.js b/.grunt/tasks/stylelint.js
index 4da9067e644..39f85917fa4 100644
--- a/.grunt/tasks/stylelint.js
+++ b/.grunt/tasks/stylelint.js
@@ -125,8 +125,9 @@ module.exports = grunt => {
             grunt.config.merge(getScssConfigForFiles(scssFiles));
             scssTasks.unshift('stylelint:scss');
         }
+        scssTasks.unshift('ignorefiles');
 
-        const cssTasks = [];
+        const cssTasks = ['ignorefiles'];
         if (hasCss) {
             grunt.config.merge(getCssConfigForFiles(cssFiles));
             cssTasks.push('stylelint:css');
diff --git a/.stylelintignore b/.stylelintignore
deleted file mode 100644
index 6428a789a19..00000000000
--- a/.stylelintignore
+++ /dev/null
@@ -1,95 +0,0 @@
-# Generated by "grunt ignorefiles"
-**/yui/build/*
-theme/boost/style/moodle.css
-theme/classic/style/moodle.css
-node_modules/
-vendor/
-admin/tool/policy/amd/src/jquery-eu-cookie-law-popup.js
-auth/cas/CAS/
-cache/stores/mongodb/MongoDB/
-enrol/lti/ims-blti/
-filter/algebra/AlgParser.pm
-filter/tex/mimetex.*
-h5p/h5plib/v124/joubel/core/
-h5p/h5plib/v124/joubel/editor/
-lib/editor/atto/plugins/html/yui/src/codemirror/
-lib/editor/atto/plugins/html/yui/src/beautify/
-lib/editor/atto/yui/src/rangy/js/*.*
-lib/editor/tinymce/plugins/pdw/tinymce/
-lib/editor/tinymce/plugins/spellchecker/rpc.php
-lib/editor/tinymce/tiny_mce/
-lib/mlbackend/php/phpml/
-lib/adodb/
-lib/behat/axe/
-lib/bennu/
-lib/evalmath/
-lib/phpspreadsheet/
-lib/google/
-lib/htmlpurifier/
-lib/jabber/
-lib/minify/matthiasmullie-minify/
-lib/minify/matthiasmullie-pathconverter/
-lib/pear/HTML/Common.php
-lib/pear/HTML/QuickForm.php
-lib/pear/HTML/QuickForm/
-lib/pear/PEAR.php
-lib/phpmailer/
-lib/simplepie/
-lib/tcpdf/
-lib/yuilib/
-lib/yuilib/gallery/
-lib/jquery/
-lib/html2text/
-lib/markdown/
-lib/xhprof/
-lib/horde/
-lib/requirejs/
-lib/amd/src/loglevel.js
-lib/mustache/
-lib/amd/src/mustache.js
-lib/graphlib.php
-lib/php-css-parser/
-lib/rtlcss/
-lib/scssphp/
-lib/spout/
-lib/amd/src/chartjs-lazy.js
-lib/maxmind/GeoIp2/
-lib/maxmind/MaxMind/
-lib/ltiprovider/
-lib/amd/src/truncate.js
-lib/fonts/
-lib/amd/src/adapter.js
-lib/validateurlsyntax.php
-lib/amd/src/popper.js
-lib/geopattern-php/
-lib/php-jwt/
-lib/babel-polyfill/
-lib/polyfills/
-lib/emoji-data/
-lib/plist/
-lib/zipstream/
-lib/php-enum/
-lib/http-message/
-media/player/videojs/amd/src/video-lazy.js
-media/player/videojs/amd/src/Youtube-lazy.js
-media/player/videojs/videojs/
-media/player/videojs/amd/src/videojs-flash-lazy.js
-media/player/videojs/videojs/video-js.swf
-mod/assign/feedback/editpdf/fpdi/
-repository/s3/S3.php
-theme/boost/scss/bootstrap/
-theme/boost/amd/src/bootstrap/alert.js
-theme/boost/amd/src/bootstrap/button.js
-theme/boost/amd/src/bootstrap/carousel.js
-theme/boost/amd/src/bootstrap/collapse.js
-theme/boost/amd/src/bootstrap/dropdown.js
-theme/boost/amd/src/bootstrap/modal.js
-theme/boost/amd/src/bootstrap/popover.js
-theme/boost/amd/src/bootstrap/tools/sanitizer.js
-theme/boost/amd/src/bootstrap/scrollspy.js
-theme/boost/amd/src/bootstrap/tab.js
-theme/boost/amd/src/bootstrap/toast.js
-theme/boost/amd/src/bootstrap/tooltip.js
-theme/boost/amd/src/bootstrap/util.js
-theme/boost/amd/src/index.js
-theme/boost/scss/fontawesome/