add path to transformHeaders - resolves #275

src/__tests__/__snapshots__/build-headers-program.ts.snap

@@ -85,3 +85,88 @@ exports[`build-headers-program without caching headers 1`] = `
   Referrer-Policy: same-origin
 "
 `;
+
+exports[`build-headers-program with all page headers configuration 1`] = `
+"## Created with gatsby-plugin-netlify
+
+/*
+  X-Frame-Options: DENY
+  X-XSS-Protection: 1; mode=block
+  X-Content-Type-Options: nosniff
+  Referrer-Policy: same-origin
+/webpack-runtime-acaa8994f1f704475e21.js
+  Cache-Control: public, max-age=31536000, immutable
+/styles.1025963f4f2ec7abbad4.css
+  Cache-Control: public, max-age=31536000, immutable
+/styles-565f081c8374bbda155f.js
+  Cache-Control: public, max-age=31536000, immutable
+/app-f33c13590352da20930f.js
+  Cache-Control: public, max-age=31536000, immutable
+/component---node-modules-gatsby-plugin-offline-app-shell-js-78f9e4dea04737fa062d.js
+  Cache-Control: public, max-age=31536000, immutable
+/0-0180cd94ef2497ac7db8.js
+  Cache-Control: public, max-age=31536000, immutable
+/component---src-templates-blog-post-js-517987eae96e75cddbe7.js
+  Cache-Control: public, max-age=31536000, immutable
+/component---src-pages-404-js-53e6c51a5a7e73090f50.js
+  Cache-Control: public, max-age=31536000, immutable
+/component---src-pages-index-js-0bdd01c77ee09ef0224c.js
+  Cache-Control: public, max-age=31536000, immutable
+/711-90491aa56de138c82516.js
+  Cache-Control: public, max-age=31536000, immutable
+/static/*
+  Cache-Control: public, max-age=31536000, immutable
+/sw.js
+  Cache-Control: no-cache
+/offline-plugin-app-shell-fallback/
+  X-Custom-PageHeader: SomeCustomValue
+/hi-folks/
+  X-Custom-PageHeader: SomeCustomValue
+/my-second-post/
+  X-Custom-PageHeader: SomeCustomValue
+/hello-world/
+  X-Custom-PageHeader: SomeCustomValue
+/404/
+  X-Custom-PageHeader: SomeCustomValue
+/
+  X-Custom-PageHeader: SomeCustomValue
+/404.html
+  X-Custom-PageHeader: SomeCustomValue
+"
+`;
+
+exports[`build-headers-program with transform headers configuration 1`] = `
+"## Created with gatsby-plugin-netlify
+
+/*
+  X-Frame-Options: DENY
+  X-XSS-Protection: 1; mode=block
+  X-Content-Type-Options: nosniff
+  Referrer-Policy: same-origin
+/webpack-runtime-acaa8994f1f704475e21.js
+  Cache-Control: public, max-age=31536000, immutable
+  X-TransformedPageHeader: webpack-runtime
+/styles.1025963f4f2ec7abbad4.css
+  Cache-Control: public, max-age=31536000, immutable
+/styles-565f081c8374bbda155f.js
+  Cache-Control: public, max-age=31536000, immutable
+/app-f33c13590352da20930f.js
+  Cache-Control: public, max-age=31536000, immutable
+/component---node-modules-gatsby-plugin-offline-app-shell-js-78f9e4dea04737fa062d.js
+  Cache-Control: public, max-age=31536000, immutable
+/0-0180cd94ef2497ac7db8.js
+  Cache-Control: public, max-age=31536000, immutable
+/component---src-templates-blog-post-js-517987eae96e75cddbe7.js
+  Cache-Control: public, max-age=31536000, immutable
+/component---src-pages-404-js-53e6c51a5a7e73090f50.js
+  Cache-Control: public, max-age=31536000, immutable
+/component---src-pages-index-js-0bdd01c77ee09ef0224c.js
+  Cache-Control: public, max-age=31536000, immutable
+/711-90491aa56de138c82516.js
+  Cache-Control: public, max-age=31536000, immutable
+/static/*
+  Cache-Control: public, max-age=31536000, immutable
+/sw.js
+  Cache-Control: no-cache
+"
+`;

src/__tests__/build-headers-program.ts

@@ -116,4 +116,41 @@ describe(`build-headers-program`, () => {
 
     expect(reporter.panic).toHaveBeenCalled()
   })
+
+  it(`with all page headers configuration`, async () => {
+    const pluginData = await createPluginData()
+
+    const pluginOptions = {
+      ...DEFAULT_OPTIONS,
+      allPageHeaders: [
+        `X-Custom-PageHeader: SomeCustomValue`
+      ]
+    }
+
+    await buildHeadersProgram(pluginData, pluginOptions, reporter)
+
+    expect(reporter.panic).not.toHaveBeenCalled()
+    expect(await readFile(pluginData.publicFolder(`_headers`), `utf8`)).toMatchSnapshot()
+  })  
+
+  it(`with transform headers configuration`, async () => {
+    const pluginData = await createPluginData()
+
+    const pluginOptions = {
+      ...DEFAULT_OPTIONS,
+      transformHeaders: (headers, path) => {
+        if (path !== '/webpack-runtime-acaa8994f1f704475e21.js') {
+          return headers
+        }        
+
+        headers.push('X-TransformedPageHeader: webpack-runtime')
+        return headers
+      }
+    }
+
+    await buildHeadersProgram(pluginData, pluginOptions, reporter)
+
+    expect(reporter.panic).not.toHaveBeenCalled()
+    expect(await readFile(pluginData.publicFolder(`_headers`), `utf8`)).toMatchSnapshot()
+  })
 })

src/build-headers-program.ts

@@ -210,7 +210,7 @@ const applyTransformHeaders =
   }: any) =>
   (headers: any) =>  
     Object.entries(headers).reduce((temp, [key, value]) => {
-      temp[key] = transformHeaders(value)
+      temp[key] = transformHeaders(value, key)
       return temp
     }, {})