status-heatmap-plugin for Grafana

- fixes for 5.1.3
- nulls as empty

Gruntfile.js

@@ -0,0 +1,66 @@
+module.exports = (grunt) => {
+  require('load-grunt-tasks')(grunt);
+
+  grunt.loadNpmTasks('grunt-execute');
+  grunt.loadNpmTasks('grunt-contrib-clean');
+
+  grunt.initConfig({
+
+    clean: ['dist'],
+
+    copy: {
+      src_to_dist: {
+        cwd: 'src',
+        expand: true,
+        src: ['**/*', '!**/*.js', '!**/*.scss'],
+        dest: 'dist'
+      },
+      pluginDef: {
+        expand: true,
+        src: ['plugin.json', 'README.md'],
+        dest: 'dist'
+      }
+    },
+
+    watch: {
+      rebuild_all: {
+        files: ['src/**/*', 'plugin.json'],
+        tasks: ['default'],
+        options: {
+          spawn: false,
+          livereload: true
+        }
+      }
+    },
+
+    babel: {
+      options: {
+        sourceMap: true,
+        presets: ['es2015'],
+        plugins: ['transform-es2015-modules-systemjs', 'transform-es2015-for-of', 'transform-class-properties', 'transform-object-rest-spread'],
+      },
+      dist: {
+        files: [{
+          cwd: 'src',
+          expand: true,
+          src: ['*.js', '**/*.js'],
+          dest: 'dist',
+          ext: '.js'
+        }]
+      }
+    },
+
+    sass: {
+      dist: {
+        files: {
+          'dist/css/status-heatmap.css': 'src/css/status-heatmap.scss'
+        }
+      }
+    }
+
+  });
+
+  grunt.registerTask('default', ['clean', 'copy:src_to_dist', 'copy:pluginDef', 'babel', 'sass']);
+  // grunt.registerTask('clean', ['clean']);
+  // grunt.registerTask('watch', ['watch']);
+};