Lint netlify-headers script

Author: Munter

scripts/netlify-headers.js

@@ -1,99 +1,99 @@
-var AssetGraph = require('assetgraph');
+'use strict';
 
-var headers = [
-    'Content-Security-Policy'
+const AssetGraph = require('assetgraph');
+
+const headers = [
+  'Content-Security-Policy'
 ];
 
-var resourceHintTypeMap = {
-    HtmlPreloadLink: 'preload',
-    HtmlPrefetchLink: 'prefetch',
-    HtmlPreconnectLink: 'preconnect',
-    HtmlDnsPrefetchLink: 'dns-prefetch'
+const resourceHintTypeMap = {
+  HtmlPreloadLink: 'preload',
+  HtmlPrefetchLink: 'prefetch',
+  HtmlPreconnectLink: 'preconnect',
+  HtmlDnsPrefetchLink: 'dns-prefetch'
 };
 
 function getHeaderForRelation (rel) {
-    let header = `Link: <${rel.href}>; rel=${resourceHintTypeMap[rel.type]}; as=${rel.as}; type=${rel.to.contentType}`;
+  let header = `Link: <${rel.href}>; rel=${resourceHintTypeMap[rel.type]}; as=${rel.as}; type=${rel.to.contentType}`;
 
-    if (rel.as === 'font') {
-        header = `${header}; crossorigin=anonymous`;
-    }
+  if (rel.as === 'font') {
+    header = `${header}; crossorigin=anonymous`;
+  }
 
-    return header;
+  return header;
 }
 
 new AssetGraph({ root: 'docs/_dist' })
-    .loadAssets('*.html')
-    .populate({
-        followRelations: { type: 'HtmlAnchor', crossorigin: false }
-    })
-    .queue(function (assetGraph) {
-        var assets = assetGraph.findAssets({ type: 'Html', isInline: false });
-
-        var headerMap = {};
-
-        assets.forEach(function (asset) {
-            var url = '/' + asset.url.replace(assetGraph.root, '').replace(/#.*/, '').replace('index.html', '');
-            if (!headerMap[url]) {
-                headerMap[url] = [];
-            }
+  .loadAssets('*.html')
+  .populate({
+    followRelations: { type: 'HtmlAnchor', crossorigin: false }
+  })
+  .queue(function (assetGraph) {
+    const assets = assetGraph.findAssets({ type: 'Html', isInline: false });
 
-            headers.forEach(function (header) {
-                var node = asset.parseTree.querySelector('meta[http-equiv=' + header + ']');
+    const headerMap = {};
 
-                if (node) {
-                    headerMap[url].push(`${header}: ${node.getAttribute('content')}`)
+    assets.forEach(function (asset) {
+      const url = '/' + asset.url.replace(assetGraph.root, '').replace(/#.*/, '').replace('index.html', '');
+      if (!headerMap[url]) {
+        headerMap[url] = [];
+      }
 
-                    node.parentNode.removeChild(node);
-                    asset.markDirty();
-                }
-            });
+      headers.forEach(function (header) {
+        const node = asset.parseTree.querySelector('meta[http-equiv=' + header + ']');
 
-            var firstCssRel = asset.outgoingRelations.filter(r => {
-                return r.type === 'HtmlStyle'
-                    && r.crossorigin === false
-                    && r.href !== undefined;
-            })[0];
+        if (node) {
+          headerMap[url].push(`${header}: ${node.getAttribute('content')}`);
 
-            if (firstCssRel) {
-                const header = `Link: <${firstCssRel.href}>; rel=preload; as=style`;
+          node.parentNode.removeChild(node);
+          asset.markDirty();
+        }
+      });
 
+      const firstCssRel = asset.outgoingRelations.filter(r => {
+        return r.type === 'HtmlStyle' &&
+                    r.crossorigin === false &&
+                    r.href !== undefined;
+      })[0];
 
-                headerMap[url].push(header);
-            }
+      if (firstCssRel) {
+        const header = `Link: <${firstCssRel.href}>; rel=preload; as=style`;
 
-            var resourceHintRelations = asset.outgoingRelations.filter(r => ['HtmlPreloadLink', 'HtmlPrefetchLink'].includes(r.type));
+        headerMap[url].push(header);
+      }
 
-            resourceHintRelations.forEach(rel => {
-                headerMap[url].push(getHeaderForRelation(rel));
+      const resourceHintRelations = asset.outgoingRelations.filter(r => ['HtmlPreloadLink', 'HtmlPrefetchLink'].includes(r.type));
 
-                rel.detach();
-            });
+      resourceHintRelations.forEach(rel => {
+        headerMap[url].push(getHeaderForRelation(rel));
 
-            var resourceHintRelations = asset.outgoingRelations.filter(r => ['HtmlPreconnectLink'].includes(r.type));
+        rel.detach();
+      });
 
-            resourceHintRelations.forEach(rel => {
-                let header = `Link: <${rel.href}>; rel=preconnect`;
+      const preconnectRelations = asset.outgoingRelations.filter(r => ['HtmlPreconnectLink'].includes(r.type));
 
-                headerMap[url].push(header);
+      preconnectRelations.forEach(rel => {
+        let header = `Link: <${rel.href}>; rel=preconnect`;
 
-                rel.detach();
-            });
-        });
+        headerMap[url].push(header);
 
-        console.log('\n## Autogenerated headers:\n')
+        rel.detach();
+      });
+    });
 
-        Object.keys(headerMap).forEach(function (url) {
-            console.log(url);
+    console.log('\n## Autogenerated headers:\n');
 
-            var httpHeaders = headerMap[url];
+    Object.keys(headerMap).forEach(function (url) {
+      console.log(url);
 
-            httpHeaders.forEach(function (header) {
-                console.log(`  ${header}`)
-            });
+      const httpHeaders = headerMap[url];
 
-            console.log('');
-        });
+      httpHeaders.forEach(function (header) {
+        console.log(`  ${header}`);
+      });
 
-    })
-    .writeAssetsToDisc({ isLoaded: true })
-    .run();
+      console.log('');
+    });
+  })
+  .writeAssetsToDisc({ isLoaded: true })
+  .run();