Added git pre commit hook for checking the contents of icons.json

scripts/checkIconsAndCategories.js

@@ -0,0 +1,49 @@
+import path from 'path';
+import icons from '../icons.json';
+import {readSvgDirectory} from './helpers';
+
+const ICONS_DIR = path.resolve(__dirname, '../icons');
+
+console.log(`Read all icons`);
+
+const svgFiles = readSvgDirectory(ICONS_DIR);
+
+const iconNames = svgFiles.map(icon => icon.split('.')[0]);
+
+let error = false;
+
+iconNames.forEach(iconName => {
+  if (typeof icons.icons[iconName] === 'undefined') {
+    console.error(`'${iconName}.svg' is not present in 'icons.json'.`);
+    error = true;
+  }
+});
+
+Object.keys(icons.icons).forEach(iconName => {
+  const icon = icons.icons[iconName];
+  if (iconNames.indexOf(iconName) === -1) {
+    console.error(`'${iconName}.svg' does not exist.`);
+    error = true;
+  }
+  icon.categories.forEach(categoryName => {
+    if (typeof icons.categories[categoryName] === 'undefined') {
+      console.error(`Icon '${iconName}' refers to the non-existing category '${categoryName}'.`);
+      error = true;
+    }
+  });
+});
+
+Object.keys(icons.categories).forEach(categoryName => {
+  const category = icons.categories[categoryName];
+  if (!category.icon) {
+    console.error(`Category '${categoryName}' does not use an icon '${category.icon}'.`);
+    error = true;
+  } else if (typeof icons.icons[category.icon] === 'undefined') {
+    console.error(`Category '${categoryName}' uses the non-existing icon '${category.icon}'.`);
+    error = true;
+  }
+});
+
+if (error) {
+  throw new Error('At least one error in icons.json prevents from committing changes.');
+}