feat: Compute the kubectl download version map at build time

- Allows for bundled kubectl config to be changed without code changes

- Introduce @k8slens/kubectl-versions

  - Compile time fetching of versions

- Update @swc/* packages

Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/kubectl-versions/.gitignore

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+build/*.mjs

packages/kubectl-versions/.swcrc

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+{
+  "$schema": "https://json.schemastore.org/swcrc",
+  "jsc": {
+    "parser": {
+      "syntax": "typescript"
+    },
+    "target": "es2022"
+  }
+}

packages/kubectl-versions/README.md

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+# @k8slens/kubectl-versions
+
+This package contains a JSON array of entries of the format ["MAJOR.MINOR", "MAJOR.MINOR.PATCH"].
+
+This object represents the current (at time of building each release of this package)
+greatest PATCH version for each "MAJOR.MINOR" version of `kubectl`.
+This is done at compile time so that we don't have to worry about being able to access this data on user machines.
+Furthermore, this is dynamic in that the previous method was to update the table by hand.

packages/kubectl-versions/build/compute-versions.ts

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+import fetch from "node-fetch";
+import { TypedRegEx } from "typed-regex";
+import { XMLParser } from "fast-xml-parser";
+import semver from "semver";
+import { writeFile } from "fs/promises";
+import path from "path";
+import { fileURLToPath } from "url";
+
+const { SemVer } = semver;
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const expectedResponseForm = TypedRegEx("v(?<version>\\d+\\.\\d+\\.\\d+)");
+
+async function requestGreatestKubectlPatchVersion(majorMinor: string): Promise<string | undefined> {
+  const response = await fetch(`https://dl.k8s.io/release/stable-${majorMinor}.txt`);
+
+  if (response.status !== 200) {
+    try {
+      const parser = new XMLParser();
+      const errorBody = parser.parse(await response.text());
+
+      throw new Error(`failed to get stable version for ${majorMinor}: ${errorBody?.Error?.Message ?? response.statusText}`);
+    } catch {
+      throw new Error(`failed to get stable version for ${majorMinor}: ${response.statusText}`);
+    }
+  }
+
+  const body = await response.text();
+  const match = expectedResponseForm.captures(body);
+
+  if (!match) {
+    throw new Error(`failed to get stable version for ${majorMinor}: unexpected response shape. body="${body}"`);
+  }
+
+  return match.version;
+}
+
+async function requestAllVersions(): Promise<[string, string][]> {
+  const greatestVersion = await requestGreatestKubectlPatchVersion("1");
+
+  if (!greatestVersion) {
+    return [];
+  }
+
+  const greatestSemVer = new SemVer(greatestVersion);
+  const majorMinorRequests = new Array<string>(greatestSemVer.minor + 1)
+    .fill("")
+    .map((value, index) => `1.${index}`)
+    .map(async (majorMinor) => [majorMinor, await requestGreatestKubectlPatchVersion(majorMinor)] as const);
+
+  return (await Promise.all(majorMinorRequests))
+    .filter((entry): entry is [string, string] => !!entry[1]);
+}
+
+async function main() {
+  const versions = await requestAllVersions();
+
+  await writeFile(path.join(__dirname, "versions.json"), JSON.stringify(versions, null, 4));
+}
+
+await main();

packages/kubectl-versions/build/versions.json

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+[
+    [
+        "1.0",
+        "1.0.7"
+    ],
+    [
+        "1.1",
+        "1.1.8"
+    ],
+    [
+        "1.2",
+        "1.2.7"
+    ],
+    [
+        "1.3",
+        "1.3.10"
+    ],
+    [
+        "1.4",
+        "1.4.12"
+    ],
+    [
+        "1.5",
+        "1.5.8"
+    ],
+    [
+        "1.6",
+        "1.6.13"
+    ],
+    [
+        "1.7",
+        "1.7.16"
+    ],
+    [
+        "1.8",
+        "1.8.15"
+    ],
+    [
+        "1.9",
+        "1.9.11"
+    ],
+    [
+        "1.10",
+        "1.10.13"
+    ],
+    [
+        "1.11",
+        "1.11.10"
+    ],
+    [
+        "1.12",
+        "1.12.10"
+    ],
+    [
+        "1.13",
+        "1.13.12"
+    ],
+    [
+        "1.14",
+        "1.14.10"
+    ],
+    [
+        "1.15",
+        "1.15.12"
+    ],
+    [
+        "1.16",
+        "1.16.15"
+    ],
+    [
+        "1.17",
+        "1.17.17"
+    ],
+    [
+        "1.18",
+        "1.18.20"
+    ],
+    [
+        "1.19",
+        "1.19.16"
+    ],
+    [
+        "1.20",
+        "1.20.15"
+    ],
+    [
+        "1.21",
+        "1.21.14"
+    ],
+    [
+        "1.22",
+        "1.22.17"
+    ],
+    [
+        "1.23",
+        "1.23.16"
+    ],
+    [
+        "1.24",
+        "1.24.10"
+    ],
+    [
+        "1.25",
+        "1.25.6"
+    ],
+    [
+        "1.26",
+        "1.26.1"
+    ]
+]

packages/kubectl-versions/index.ts

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+import raw from "./build/versions.json";
+
+export const kubectlVersions = raw as [string, string][];

packages/kubectl-versions/jest.config.js

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+module.exports = require("@k8slens/jest").monorepoPackageConfig(__dirname).configForReact;

packages/kubectl-versions/package.json

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+{
+  "name": "@k8slens/kubectl-versions",
+  "private": false,
+  "version": "6.5.0-alpha.1",
+  "description": "Package of kubectl versions at build time",
+  "files": [
+    "dist"
+  ],
+  "publishConfig": {
+    "access": "public",
+    "registry": "https://registry.npmjs.org/"
+  },
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "author": {
+    "name": "OpenLens Authors",
+    "email": "info@k8slens.dev"
+  },
+  "license": "MIT",
+  "homepage": "https://github.com/lensapp/lens",
+  "scripts": {
+    "precompute-versions": "swc ./build/compute-versions.ts -o ./build/compute-versions.mjs",
+    "compute-versions": "node ./build/compute-versions.mjs",
+    "prebuild": "npm run compute-versions",
+    "build": "webpack",
+    "dev": "webpack --mode=development --watch",
+    "test": "jest --coverage --runInBand"
+  },
+  "peerDependencies": {
+    "@ogre-tools/injectable": "^15.1.1"
+  },
+  "devDependencies": {
+    "@swc/cli": "^0.1.62",
+    "@swc/core": "^1.3.44",
+    "fast-xml-parser": "^4.1.2",
+    "semver": "^7.3.8",
+    "ts-node": "^10.9.1",
+    "typed-regex": "^0.0.8"
+  }
+}

packages/kubectl-versions/tsconfig.json

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+{
+  "extends": "@k8slens/typescript/config/base.json"
+}

packages/kubectl-versions/webpack.config.js

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+module.exports = require("@k8slens/webpack").configForNode;