Fix update-node-version script for non-existent @types/node version

extensions/ql-vscode/scripts/update-node-version.ts

@@ -3,13 +3,37 @@ import { execSync } from "child_process";
 import { outputFile, readFile, readJSON } from "fs-extra";
 import { getVersionInformation } from "./util/vscode-versions";
 import { fetchJson } from "./util/fetch";
+import { SemVer } from "semver";
 
 const extensionDirectory = resolve(__dirname, "..");
 
 interface Release {
   tag_name: string;
 }
 
+interface NpmViewError {
+  error: {
+    code: string;
+    summary: string;
+    detail: string;
+  };
+}
+
+interface ExecError extends Error {
+  status: number;
+  stdout: string;
+}
+
+function isExecError(e: unknown): e is ExecError {
+  return (
+    e instanceof Error &&
+    "status" in e &&
+    typeof e.status === "number" &&
+    "stdout" in e &&
+    typeof e.stdout === "string"
+  );
+}
+
 async function updateNodeVersion() {
   const latestVsCodeRelease = await fetchJson<Release>(
     "https://api.github.com/repos/microsoft/vscode/releases/latest",
@@ -49,20 +73,64 @@ async function updateNodeVersion() {
     "utf8",
   );
 
+  const nodeVersion = new SemVer(versionInformation.nodeVersion);
+
   // The @types/node version needs to match the first two parts of the Node
   // version, e.g. if the Node version is 18.17.3, the @types/node version
   // should be 18.17.*. This corresponds with the documentation at
   // https://github.com/definitelytyped/definitelytyped#how-do-definitely-typed-package-versions-relate-to-versions-of-the-corresponding-library
   // "The patch version of the type declaration package is unrelated to the library patch version. This allows
   // Definitely Typed to safely update type declarations for the same major/minor version of a library."
   // 18.17.* is equivalent to >=18.17.0 <18.18.0
-  const typesNodeVersion = versionInformation.nodeVersion
-    .split(".")
-    .slice(0, 2)
-    .join(".");
+  // In some cases, the @types/node version matching the exact Node version may not exist, in which case we'll try
+  // the next lower minor version, and so on, until we find a version that exists.
+  const typesNodeSemver = new SemVer(nodeVersion);
+  typesNodeSemver.patch = 0;
+
+  // eslint-disable-next-line no-constant-condition
+  while (true) {
+    const typesNodeVersion = `${typesNodeSemver.major}.${typesNodeSemver.minor}.*`;
+
+    try {
+      // Check that this version actually exists
+      console.log(`Checking if @types/node@${typesNodeVersion} exists`);
+
+      execSync(`npm view --json "@types/node@${typesNodeVersion}"`, {
+        encoding: "utf-8",
+        stdio: "pipe",
+      });
+
+      console.log(`@types/node@${typesNodeVersion} exists`);
+
+      // If it exists, we can break out of this loop
+      break;
+    } catch (e: unknown) {
+      if (!isExecError(e)) {
+        throw e;
+      }
+
+      const error = JSON.parse(e.stdout) as NpmViewError;
+      if (error.error.code !== "E404") {
+        throw new Error(error.error.detail);
+      }
+
+      console.log(
+        `@types/node package doesn't exist for ${typesNodeVersion}, trying a lower version (${error.error.summary})`,
+      );
+
+      // This means the version doesn't exist, so we'll try decrementing the minor version
+      typesNodeSemver.minor -= 1;
+      if (typesNodeSemver.minor < 0) {
+        throw new Error(
+          `Could not find a suitable @types/node version for Node ${nodeVersion.format()}`,
+        );
+      }
+    }
+  }
 
   packageJson.engines.node = `^${versionInformation.nodeVersion}`;
-  packageJson.devDependencies["@types/node"] = `${typesNodeVersion}.*`;
+  packageJson.devDependencies["@types/node"] =
+    `${typesNodeSemver.major}.${typesNodeSemver.minor}.*`;
 
   await outputFile(
     join(extensionDirectory, "package.json"),