From eb7389abb241b415774798ecc9d45e6b13c16ed8 Mon Sep 17 00:00:00 2001
From: Simon Plenderleith <simon@simonplend.co.uk>
Date: Sat, 17 Sep 2022 19:31:13 +0100
Subject: [PATCH] Add support to Prism for the Astro language

This enables syntax highlighting for `astro` code blocks.

The `@astro/prism` package is pinned to v1.0.1 as we're
importing a module from it that isn't exposed by the
package.

`prism-include-languages.js` was generated with:

```bash
npm run swizzle @docusaurus/theme-classic prism-include-languages
```

See: https://docusaurus.io/docs/markdown-features/code-blocks#supported-languages
---
 package-lock.json                    | 20 ++++++++++++++++++++
 package.json                         |  1 +
 src/theme/prism-include-languages.js | 25 +++++++++++++++++++++++++
 3 files changed, 46 insertions(+)
 create mode 100644 src/theme/prism-include-languages.js

diff --git a/package-lock.json b/package-lock.json
index d1e24ef595..ea58130a62 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,6 +8,7 @@
       "name": "platformatic-oss-website",
       "version": "0.0.1",
       "dependencies": {
+        "@astrojs/prism": "^1.0.1",
         "@docusaurus/core": "2.0.1",
         "@docusaurus/preset-classic": "2.0.1",
         "@mdx-js/react": "^1.6.22",
@@ -186,6 +187,17 @@
         "node": ">=6.0.0"
       }
     },
+    "node_modules/@astrojs/prism": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@astrojs/prism/-/prism-1.0.1.tgz",
+      "integrity": "sha512-HxEFslvbv+cfOs51q/C7aMVFuW3EAGg0d1xXU/0e/QeScDzfrp5Ra4SOb8mV082SgENVjtVvet4zR84t3at4VQ==",
+      "dependencies": {
+        "prismjs": "^1.28.0"
+      },
+      "engines": {
+        "node": "^14.18.0 || >=16.12.0"
+      }
+    },
     "node_modules/@babel/code-frame": {
       "version": "7.18.6",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.18.6.tgz",
@@ -13214,6 +13226,14 @@
         "@jridgewell/trace-mapping": "^0.3.9"
       }
     },
+    "@astrojs/prism": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@astrojs/prism/-/prism-1.0.1.tgz",
+      "integrity": "sha512-HxEFslvbv+cfOs51q/C7aMVFuW3EAGg0d1xXU/0e/QeScDzfrp5Ra4SOb8mV082SgENVjtVvet4zR84t3at4VQ==",
+      "requires": {
+        "prismjs": "^1.28.0"
+      }
+    },
     "@babel/code-frame": {
       "version": "7.18.6",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.18.6.tgz",
diff --git a/package.json b/package.json
index 8d136d9900..6dc3dcce7f 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
     "write-heading-ids": "docusaurus write-heading-ids"
   },
   "dependencies": {
+    "@astrojs/prism": "1.0.1",
     "@docusaurus/core": "2.0.1",
     "@docusaurus/preset-classic": "2.0.1",
     "@mdx-js/react": "^1.6.22",
diff --git a/src/theme/prism-include-languages.js b/src/theme/prism-include-languages.js
new file mode 100644
index 0000000000..a20e626b6f
--- /dev/null
+++ b/src/theme/prism-include-languages.js
@@ -0,0 +1,25 @@
+import siteConfig from '@generated/docusaurus.config';
+
+export default function prismIncludeLanguages(PrismObject) {
+  const {
+    themeConfig: {prism},
+  } = siteConfig;
+  const {additionalLanguages} = prism;
+  // Prism components work on the Prism instance on the window, while prism-
+  // react-renderer uses its own Prism instance. We temporarily mount the
+  // instance onto window, import components to enhance it, then remove it to
+  // avoid polluting global namespace.
+  // You can mutate PrismObject: registering plugins, deleting languages... As
+  // long as you don't re-assign it
+  globalThis.Prism = PrismObject;
+  additionalLanguages.forEach((lang) => {
+    // eslint-disable-next-line global-require, import/no-dynamic-require
+    require(`prismjs/components/prism-${lang}`);
+  });
+
+  // TODO: This is a hack. This can be done properly if Astro agree to the
+  //       package exposing this entrypoint.
+  require('../../node_modules/@astrojs/prism/dist/plugin.js').addAstro(PrismObject);
+
+  delete globalThis.Prism;
+}