Combined dark/light CSS files without duplicated code

.github/workflows/main.yml

@@ -44,7 +44,6 @@ jobs:
             - uses: actions/checkout@v2
               with:
                   fetch-depth: 0
-
             - uses: actions/setup-node@v2
               with:
                   node-version: 14
@@ -56,20 +55,14 @@ jobs:
                   stamp: package.json
                   setCommonVars: true
                   setAllVars: true
-
             - run: |
                   echo 'NpmPackageVersion: ${{ steps.nbgv.outputs.NpmPackageVersion }}'
 
             - run: npm install
-              if: github.event_name == 'push'
-
             - run: npm run build
-              if: github.event_name == 'push'
-
             - run: npm publish --access=public
               env:
                   NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
-              if: github.event_name == 'push'
 
             - uses: actions/create-release@v1
               env:
@@ -78,5 +71,4 @@ jobs:
                   tag_name: v${{ steps.nbgv.outputs.NpmPackageVersion }}
                   release_name: v${{ steps.nbgv.outputs.NpmPackageVersion }} Release
                   draft: false
-                  prerelease: false
-              if: github.event_name == 'push'
+                  prerelease: ${{ github.event_name != 'push' }}

clean_non_color_attr.js

@@ -0,0 +1,69 @@
+//
+// Based on https://github.com/dinhani/gulp-css-remove-attributes/blob/master/index.js
+//
+const through = require('through2');
+const css = require('css');
+
+const PLUGIN_NAME = 'gulp-css-clean-non-color-attributes';
+module.exports = function (options) {
+    const attributesNotToRemove = [
+        'color',
+        'background',
+        'background-color',
+        'background-image',
+        'border',
+        'border-color',
+        'border-top',
+        'border-right',
+        'border-bottom',
+        'border-left',
+        'box-shadow',
+        'outline-color',
+        'text-shadow',
+    ];
+
+    // INPUT
+    function parseInputCss(inputFile, encoding, options) {
+        let fileContent = inputFile.contents.toString(encoding);
+        let parsedCss = css.parse(fileContent, options);
+        return parsedCss;
+    }
+
+    // PARSING
+    function removeCssAttributes(parsedCss) {
+        parsedCss.stylesheet.rules = mapRules(parsedCss.stylesheet.rules);
+        return parsedCss;
+    }
+
+    function mapRules(rules) {
+        return rules.map((rule) => {
+            // only filter rules, the other types are just kept
+            if (rule.type === 'rule') {
+                rule.declarations = rule.declarations.filter((declaration) => attributesNotToRemove.includes(declaration.property));
+            }
+            if (rule.type === 'media') {
+                rule.rules = mapRules(rule.rules);
+            }
+            return rule;
+        });
+    }
+
+    // OUTPUT
+    function outputFinalCss(modifiedCss, options) {
+        return css.stringify(modifiedCss, options);
+    }
+
+    // MAIN
+    let transform = function (file, encoding, callback) {
+        let parsedCss = parseInputCss(file, encoding, options);
+        let modifiedCss = removeCssAttributes(parsedCss, attributesNotToRemove);
+        let finalCss = outputFinalCss(modifiedCss, options);
+        file.contents = Buffer.from(finalCss);
+
+        // success
+        callback(null, file);
+    };
+
+    //
+    return through.obj(transform);
+};