fix: verify @types/node version with registry

Signed-off-by: Michael Molisani <[email protected]>

packages/create-app/src/app.ts

@@ -4,6 +4,7 @@ import { buildApplication, buildCommand } from "@stricli/core";
 import packageJson from "../package.json";
 
 const command = buildCommand({
+    /* c8 ignore next */
     loader: async () => import("./impl"),
     parameters: {
         positional: {

packages/create-app/src/impl.ts

@@ -2,6 +2,7 @@
 // Distributed under the terms of the Apache 2.0 license.
 import type { PackageJson, TsConfigJson } from "type-fest";
 import self from "../package.json";
+import type { LocalContext } from "./context";
 import {
     binBashCompleteModuleText,
     binBashCompleteScriptText,
@@ -19,8 +20,8 @@ import {
     singleCommandAppText,
     singleCommandImplText,
 } from "./files";
+import { calculateAcceptableNodeVersions, type NodeVersions } from "./node";
 import srcTsconfig from "./tsconfig.json";
-import type { LocalContext } from "./context";
 
 interface TsupConfig {
     entry?: string[];
@@ -45,7 +46,7 @@ type PackageJsonTemplateValues = Pick<PackageJson.PackageJsonStandard, "name"> &
 function buildPackageJson(
     values: PackageJsonTemplateValues,
     commandName: string,
-    nodeMajorVersion: number,
+    nodeVersions: NodeVersions,
 ): LocalPackageJson {
     return {
         ...values,
@@ -55,7 +56,7 @@ function buildPackageJson(
             [commandName]: "dist/cli.js",
         },
         engines: {
-            node: `>=${nodeMajorVersion}`,
+            node: nodeVersions.engine,
         },
         scripts: {
             prebuild: "tsc -p src/tsconfig.json",
@@ -74,7 +75,7 @@ function buildPackageJson(
             "@stricli/core": self.dependencies["@stricli/core"],
         },
         devDependencies: {
-            "@types/node": `${nodeMajorVersion}.x`,
+            "@types/node": nodeVersions.types,
             tsup: self.devDependencies.tsup,
             typescript: self.devDependencies.typescript,
         },
@@ -135,8 +136,8 @@ export default async function (this: LocalContext, flags: CreateProjectFlags, di
 
     const packageName = flags.name ?? path.basename(directoryPath);
     const commandName = flags.command ?? packageName;
-    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-    const nodeMajorVersion = this.process.versions.node.split(".").map(Number)[0]!;
+
+    const nodeVersions = await calculateAcceptableNodeVersions(this.process);
 
     let packageJson = buildPackageJson(
         {
@@ -147,7 +148,7 @@ export default async function (this: LocalContext, flags: CreateProjectFlags, di
             type: flags.type,
         },
         commandName,
-        nodeMajorVersion,
+        nodeVersions,
     );
 
     const bashCommandName = calculateBashCompletionCommand(commandName);

packages/create-app/src/node.ts

@@ -0,0 +1,58 @@
+// Copyright 2024 Bloomberg Finance L.P.
+// Distributed under the terms of the Apache 2.0 license.
+import { discoverPackageRegistry, fetchPackageVersions } from "./registry";
+
+export interface NodeVersions {
+    readonly engine: string;
+    readonly types: string;
+}
+
+const MAXIMUM_KNOWN_SAFE_NODE_TYPES_VERSION = 22;
+
+export async function calculateAcceptableNodeVersions(process: NodeJS.Process): Promise<NodeVersions> {
+    const majorVersion = Number(process.versions.node.split(".")[0]);
+    let typesVersion: string | undefined;
+
+    if (majorVersion > MAXIMUM_KNOWN_SAFE_NODE_TYPES_VERSION) {
+        // To avoid hitting the registry every time, only run when higher than a statically-known maximum safe value.
+        const registry = discoverPackageRegistry(process);
+        const versions = registry && (await fetchPackageVersions(registry, "@types/node"));
+        if (versions?.includes(process.versions.node)) {
+            typesVersion = `^${process.versions.node}`;
+        } else if (versions) {
+            const typeMajors = new Set(versions.map((version) => Number(version.split(".")[0])));
+            if (typeMajors.has(majorVersion)) {
+                // Previously unknown major version exists, which means MAXIMUM_KNOWN_SAFE_NODE_TYPES_VERSION should be updated.
+                typesVersion = `${majorVersion}.x`;
+            } else {
+                // Filter available major versions to just even (LTS) and pick highest.
+                // This assumes that types will exist for the LTS version just prior to the current unknown major version.
+                const highestEvenTypeMajor = [...typeMajors]
+                    .filter((major) => major % 2 === 0)
+                    .toSorted()
+                    .at(-1);
+                if (highestEvenTypeMajor) {
+                    typesVersion = `${highestEvenTypeMajor}.x`;
+                    process.stderr.write(
+                        `No version of @types/node found with major ${majorVersion}, falling back to ${typesVersion}\n`,
+                    );
+                }
+            }
+        }
+    } else {
+        typesVersion = `${majorVersion}.x`;
+    }
+
+    if (!typesVersion) {
+        typesVersion = `${majorVersion}.x`;
+        // Should only be hit if something went wrong determining registry URL or fetching from registry.
+        process.stderr.write(
+            `Unable to determine version of @types/node for ${process.versions.node}, assuming ${typesVersion}\n`,
+        );
+    }
+
+    return {
+        engine: `>=${majorVersion}`,
+        types: typesVersion,
+    };
+}

packages/create-app/src/registry.ts

@@ -0,0 +1,29 @@
+// Copyright 2024 Bloomberg Finance L.P.
+// Distributed under the terms of the Apache 2.0 license.
+import child_process from "node:child_process";
+
+export function discoverPackageRegistry(process: NodeJS.Process): string | undefined {
+    if (process.env["NPM_CONFIG_REGISTRY"]) {
+        return process.env["NPM_CONFIG_REGISTRY"];
+    }
+
+    if (process.env["NPM_EXECPATH"]) {
+        return child_process
+            .execFileSync(process.execPath, [process.env["NPM_EXECPATH"], "config", "get", "registry"], {
+                encoding: "utf-8",
+            })
+            .trim();
+    }
+}
+
+export async function fetchPackageVersions(
+    registry: string,
+    packageName: string,
+): Promise<readonly string[] | undefined> {
+    const input = registry + (registry.endsWith("/") ? packageName : `/${packageName}`);
+    const response = await fetch(input);
+    const data = await response.json();
+    if (typeof data === "object" && data && "versions" in data && typeof data.versions === "object") {
+        return Object.keys(data.versions ?? {});
+    }
+}