From b1f6ff5862cf7c717b71f387936bbb9d464d0426 Mon Sep 17 00:00:00 2001
From: SkyratBot <59378654+SkyratBot@users.noreply.github.com>
Date: Fri, 4 Nov 2022 18:55:52 +0100
Subject: [PATCH] [MIRROR] Null-checks PR Body in removeGuideComments [MDB
 IGNORE] (#17361)

Null-checks PR Body in removeGuideComments

Co-authored-by: san7890 <the@san7890.com>
---
 .../pull_request_hooks/removeGuideComments.js | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 tools/pull_request_hooks/removeGuideComments.js

diff --git a/tools/pull_request_hooks/removeGuideComments.js b/tools/pull_request_hooks/removeGuideComments.js
new file mode 100644
index 00000000000..c7cdcd1ca67
--- /dev/null
+++ b/tools/pull_request_hooks/removeGuideComments.js
@@ -0,0 +1,41 @@
+import fs from "fs";
+
+const REGEX_COMMENT = /<!--.+?-->/g;
+
+// Make sure we only remove default comments
+const comments = [];
+
+for (const match of fs
+  .readFileSync(".github/PULL_REQUEST_TEMPLATE.md", { encoding: "utf8" })
+  .matchAll(REGEX_COMMENT)) {
+  comments.push(match[0]);
+}
+
+function escapeRegex(string) {
+  return string.replace(/[-\/\\^$*+?.()|[\]{}]/g, "\\$&");
+}
+
+export async function removeGuideComments({ github, context }) {
+  let newBody = context.payload.pull_request.body;
+
+  if (!newBody) {
+	console.log("PR body is empty, skipping...");
+	return;
+  }
+
+  for (const comment of comments) {
+    newBody = newBody.replace(
+      new RegExp(`^\\s*${escapeRegex(comment)}\\s*`, "gm"),
+      "\n"
+    );
+  }
+
+  if (newBody !== context.payload.pull_request.body) {
+    await github.rest.pulls.update({
+      pull_number: context.payload.pull_request.number,
+      repo: context.repo.repo,
+      owner: context.repo.owner,
+      body: newBody,
+    });
+  }
+}