Publish the latest Android version code (#2085)

* feat(website): publish latest Android version code

* fix(website): select latest Android APK release

packages/website/src/android-version.test.ts

@@ -0,0 +1,14 @@
+import { describe, expect, it } from "vitest";
+import { getAndroidVersionCode } from "./android-version";
+
+describe("getAndroidVersionCode", () => {
+  it("matches the Android build version code for a stable release", () => {
+    expect(getAndroidVersionCode("0.1.107")).toBe(1107);
+  });
+
+  it("rejects versions that cannot map to a unique Android version code", () => {
+    expect(() => getAndroidVersionCode("0.1000.0")).toThrow(
+      "Cannot derive collision-free Android versionCode from version: 0.1000.0",
+    );
+  });
+});

packages/website/src/android-version.ts

@@ -0,0 +1,22 @@
+export function getAndroidVersionCode(version: string): number {
+  const match = /^(\d+)\.(\d+)\.(\d+)(?:[-+].*)?$/.exec(version);
+  if (!match) {
+    throw new Error(`Cannot derive Android versionCode from non-semver version: ${version}`);
+  }
+
+  const [, majorText, minorText, patchText] = match;
+  const major = Number(majorText);
+  const minor = Number(minorText);
+  const patch = Number(patchText);
+
+  if (minor > 999 || patch > 999) {
+    throw new Error(`Cannot derive collision-free Android versionCode from version: ${version}`);
+  }
+
+  const versionCode = major * 1_000_000 + minor * 1_000 + patch;
+  if (!Number.isSafeInteger(versionCode) || versionCode <= 0 || versionCode > 2_100_000_000) {
+    throw new Error(`Derived Android versionCode is out of range: ${versionCode}`);
+  }
+
+  return versionCode;
+}

packages/website/src/cloudflare-cache.ts

@@ -0,0 +1,9 @@
+import { env, waitUntil } from "cloudflare:workers";
+import type { WebsiteCacheContext } from "./github-cache";
+
+export function getWebsiteCacheContext(): WebsiteCacheContext {
+  return {
+    cache: (env as { WEBSITE_CACHE?: KVNamespace }).WEBSITE_CACHE ?? null,
+    waitUntil,
+  };
+}

packages/website/src/github-cache.ts

@@ -1,7 +1,10 @@
-import { env, waitUntil } from "cloudflare:workers";
-
 export const GITHUB_CACHE_TTL_MS = 5 * 60 * 1000;
 
+export interface WebsiteCacheContext {
+  cache: KVNamespace | null;
+  waitUntil: (promise: Promise<unknown>) => void;
+}
+
 interface CachedValue<T> {
   fetchedAt: number;
   value: T;
@@ -9,10 +12,6 @@ interface CachedValue<T> {
 
 type Validator<T> = (value: unknown) => value is T;
 
-function getWebsiteCache(): KVNamespace | null {
-  return (env as { WEBSITE_CACHE?: KVNamespace }).WEBSITE_CACHE ?? null;
-}
-
 function isCachedValue<T>(value: unknown, isValue: Validator<T>): value is CachedValue<T> {
   if (typeof value !== "object" || value === null) return false;
   const record = value as Record<string, unknown>;
@@ -20,17 +19,20 @@ function isCachedValue<T>(value: unknown, isValue: Validator<T>): value is Cache
 }
 
 async function readCachedValue<T>(
+  cache: KVNamespace | null,
   key: string,
   isValue: Validator<T>,
 ): Promise<CachedValue<T> | null> {
-  const cache = getWebsiteCache();
   if (!cache) return null;
   const cached = await cache.get(key, { cacheTtl: 60, type: "json" });
   return isCachedValue(cached, isValue) ? cached : null;
 }
 
-async function writeCachedValue<T>(key: string, value: T): Promise<void> {
-  const cache = getWebsiteCache();
+async function writeCachedValue<T>(
+  cache: KVNamespace | null,
+  key: string,
+  value: T,
+): Promise<void> {
   if (!cache) return;
   await cache.put(
     key,
@@ -42,20 +44,22 @@ async function writeCachedValue<T>(key: string, value: T): Promise<void> {
 }
 
 export async function getBlockingColdCache<T>({
+  context,
   key,
   isValue,
   fetchFresh,
 }: {
+  context: WebsiteCacheContext;
   key: string;
   isValue: Validator<T>;
   fetchFresh: () => Promise<T>;
 }): Promise<T> {
-  const cached = await readCachedValue(key, isValue);
+  const cached = await readCachedValue(context.cache, key, isValue);
   if (cached) {
     if (Date.now() - cached.fetchedAt > GITHUB_CACHE_TTL_MS) {
-      waitUntil(
+      context.waitUntil(
         fetchFresh()
-          .then((fresh) => writeCachedValue(key, fresh))
+          .then((fresh) => writeCachedValue(context.cache, key, fresh))
           .catch(() => undefined),
       );
     }
@@ -63,6 +67,6 @@ export async function getBlockingColdCache<T>({
   }
 
   const fresh = await fetchFresh();
-  await writeCachedValue(key, fresh);
+  await writeCachedValue(context.cache, key, fresh);
   return fresh;
 }

packages/website/src/latest-release.test.ts

@@ -0,0 +1,32 @@
+import { describe, expect, it } from "vitest";
+import { getLatestAndroidVersionFromReleases, type GitHubRelease } from "./latest-release";
+
+function release({
+  version,
+  hasApk,
+  prerelease = false,
+}: {
+  version: string;
+  hasApk: boolean;
+  prerelease?: boolean;
+}): GitHubRelease {
+  const tag = `v${version}`;
+  return {
+    tag_name: tag,
+    assets: hasApk ? [{ name: `paseo-${tag}-android.apk` }] : [],
+    prerelease,
+    draft: false,
+  };
+}
+
+describe("getLatestAndroidVersionFromReleases", () => {
+  it("selects the latest stable release that contains an Android APK", () => {
+    const releases = [
+      release({ version: "0.1.109", hasApk: true, prerelease: true }),
+      release({ version: "0.1.108", hasApk: false }),
+      release({ version: "0.1.107", hasApk: true }),
+    ];
+
+    expect(getLatestAndroidVersionFromReleases(releases)).toBe("0.1.107");
+  });
+});

packages/website/src/latest-release.ts

@@ -0,0 +1,160 @@
+import { getBlockingColdCache, type WebsiteCacheContext } from "./github-cache";
+
+interface GitHubAsset {
+  name: string;
+}
+
+export interface GitHubRelease {
+  tag_name: string;
+  assets: GitHubAsset[];
+  prerelease: boolean;
+  draft: boolean;
+}
+
+export interface ReleaseInfo {
+  version: string;
+  linuxAppImageAsset: string;
+  windowsX64Asset: string | null;
+  windowsArm64Asset: string | null;
+}
+
+const LINUX_APPIMAGE_ASSET_PATTERN =
+  /^Paseo-(?:\d+\.\d+\.\d+(?:-[0-9A-Za-z.-]+)-)?x86_64\.AppImage$/;
+
+const REQUIRED_ASSET_PATTERNS = [
+  /Paseo-.*-arm64\.dmg$/,
+  LINUX_APPIMAGE_ASSET_PATTERN,
+  /Paseo-Setup-.*\.exe$/,
+];
+
+const GITHUB_RELEASES_URL = "https://api.github.com/repos/getpaseo/paseo/releases?per_page=10";
+const RELEASE_CACHE_KEY = "github-release:v1";
+const ANDROID_RELEASE_CACHE_KEY = "github-android-release:v1";
+
+function hasRequiredAssets(release: GitHubRelease): boolean {
+  return REQUIRED_ASSET_PATTERNS.every((pattern) =>
+    release.assets.some((asset) => pattern.test(asset.name)),
+  );
+}
+
+function pickWindowsAssets(assets: GitHubAsset[]) {
+  const x64Suffixed = assets.find((asset) => /Paseo-Setup-.*-x64\.exe$/.test(asset.name));
+  const arm64 = assets.find((asset) => /Paseo-Setup-.*-arm64\.exe$/.test(asset.name));
+  const legacy = assets.find(
+    (asset) =>
+      /Paseo-Setup-.*\.exe$/.test(asset.name) &&
+      !asset.name.endsWith("-x64.exe") &&
+      !asset.name.endsWith("-arm64.exe"),
+  );
+  return {
+    x64: (x64Suffixed ?? legacy)?.name ?? null,
+    arm64: arm64?.name ?? null,
+  };
+}
+
+function pickLinuxAppImageAsset(assets: GitHubAsset[]) {
+  return assets.find((asset) => LINUX_APPIMAGE_ASSET_PATTERN.test(asset.name))?.name ?? null;
+}
+
+function versionFromTag(tag: string): string {
+  return tag.replace(/^v/, "");
+}
+
+async function fetchGitHubReleases(): Promise<GitHubRelease[]> {
+  const response = await fetch(GITHUB_RELEASES_URL, {
+    headers: {
+      Accept: "application/vnd.github+json",
+      "User-Agent": "paseo-website",
+    },
+    cf: {
+      cacheEverything: true,
+      cacheTtl: 60,
+      cacheKey: "github-releases-latest",
+    },
+  } as RequestInit);
+  if (!response.ok) throw new Error(`github releases ${response.status}`);
+
+  return (await response.json()) as GitHubRelease[];
+}
+
+async function fetchLatestReadyRelease(): Promise<ReleaseInfo> {
+  const releases = await fetchGitHubReleases();
+  const ready = releases.find(
+    (release) => !release.prerelease && !release.draft && hasRequiredAssets(release),
+  );
+  if (!ready) throw new Error("no ready GitHub release found");
+
+  const windowsAssets = pickWindowsAssets(ready.assets);
+  const linuxAppImageAsset = pickLinuxAppImageAsset(ready.assets);
+  if (!linuxAppImageAsset) throw new Error("ready release missing Linux AppImage asset");
+
+  return {
+    version: versionFromTag(ready.tag_name),
+    linuxAppImageAsset,
+    windowsX64Asset: windowsAssets.x64,
+    windowsArm64Asset: windowsAssets.arm64,
+  };
+}
+
+export function getLatestAndroidVersionFromReleases(releases: GitHubRelease[]): string {
+  const release = releases.find((candidate) => {
+    if (candidate.prerelease || candidate.draft) return false;
+    const version = versionFromTag(candidate.tag_name);
+    if (!/^\d+\.\d+\.\d+$/.test(version)) return false;
+    return candidate.assets.some(
+      (asset) => asset.name === `paseo-${candidate.tag_name}-android.apk`,
+    );
+  });
+  if (!release) throw new Error("no stable GitHub release with an Android APK found");
+  return versionFromTag(release.tag_name);
+}
+
+async function fetchLatestAndroidVersion(): Promise<string> {
+  return getLatestAndroidVersionFromReleases(await fetchGitHubReleases());
+}
+
+function isAndroidVersion(value: unknown): value is string {
+  return typeof value === "string" && /^\d+\.\d+\.\d+$/.test(value);
+}
+
+function isReleaseInfo(value: unknown): value is ReleaseInfo {
+  if (typeof value !== "object" || value === null) return false;
+  const record = value as Record<string, unknown>;
+  return (
+    typeof record.version === "string" &&
+    /^\d+\.\d+\.\d+(?:-[0-9A-Za-z.-]+)?$/.test(record.version) &&
+    typeof record.linuxAppImageAsset === "string" &&
+    (record.linuxAppImageAsset === "Paseo-x86_64.AppImage" ||
+      new RegExp(`^Paseo-${record.version.replaceAll(".", "\\.")}-x86_64\\.AppImage$`).test(
+        record.linuxAppImageAsset,
+      )) &&
+    (typeof record.windowsX64Asset === "string" || record.windowsX64Asset === null) &&
+    (typeof record.windowsArm64Asset === "string" || record.windowsArm64Asset === null) &&
+    (record.windowsX64Asset === null ||
+      new RegExp(`^Paseo-Setup-${record.version.replaceAll(".", "\\.")}(?:-x64)?\\.exe$`).test(
+        record.windowsX64Asset,
+      )) &&
+    (record.windowsArm64Asset === null ||
+      new RegExp(`^Paseo-Setup-${record.version.replaceAll(".", "\\.")}-arm64\\.exe$`).test(
+        record.windowsArm64Asset,
+      ))
+  );
+}
+
+export async function getLatestReleaseInfo(context: WebsiteCacheContext): Promise<ReleaseInfo> {
+  return getBlockingColdCache({
+    context,
+    key: RELEASE_CACHE_KEY,
+    isValue: isReleaseInfo,
+    fetchFresh: fetchLatestReadyRelease,
+  });
+}
+
+export async function getLatestAndroidVersion(context: WebsiteCacheContext): Promise<string> {
+  return getBlockingColdCache({
+    context,
+    key: ANDROID_RELEASE_CACHE_KEY,
+    isValue: isAndroidVersion,
+    fetchFresh: fetchLatestAndroidVersion,
+  });
+}

packages/website/src/release.ts

@@ -1,121 +1,7 @@
 import { createServerFn } from "@tanstack/react-start";
-import { getBlockingColdCache } from "./github-cache";
-
-interface GitHubAsset {
-  name: string;
-}
-
-interface GitHubRelease {
-  tag_name: string;
-  assets: GitHubAsset[];
-  prerelease: boolean;
-  draft: boolean;
-}
-
-const LINUX_APPIMAGE_ASSET_PATTERN =
-  /^Paseo-(?:\d+\.\d+\.\d+(?:-[0-9A-Za-z.-]+)-)?x86_64\.AppImage$/;
-
-const REQUIRED_ASSET_PATTERNS = [
-  /Paseo-.*-arm64\.dmg$/, // Mac Apple Silicon
-  LINUX_APPIMAGE_ASSET_PATTERN, // Linux AppImage
-  /Paseo-Setup-.*\.exe$/, // Windows (any arch)
-];
-
-function hasRequiredAssets(release: GitHubRelease): boolean {
-  return REQUIRED_ASSET_PATTERNS.every((pattern) =>
-    release.assets.some((asset) => pattern.test(asset.name)),
-  );
-}
-
-function pickWindowsAssets(assets: GitHubAsset[]) {
-  const x64Suffixed = assets.find((a) => /Paseo-Setup-.*-x64\.exe$/.test(a.name));
-  const arm64 = assets.find((a) => /Paseo-Setup-.*-arm64\.exe$/.test(a.name));
-  const legacy = assets.find(
-    (a) =>
-      /Paseo-Setup-.*\.exe$/.test(a.name) &&
-      !a.name.endsWith("-x64.exe") &&
-      !a.name.endsWith("-arm64.exe"),
-  );
-  return {
-    x64: (x64Suffixed ?? legacy)?.name ?? null,
-    arm64: arm64?.name ?? null,
-  };
-}
-
-function pickLinuxAppImageAsset(assets: GitHubAsset[]) {
-  return assets.find((a) => LINUX_APPIMAGE_ASSET_PATTERN.test(a.name))?.name ?? null;
-}
-
-function versionFromTag(tag: string): string {
-  return tag.replace(/^v/, "");
-}
-
-interface ReleaseInfo {
-  version: string;
-  linuxAppImageAsset: string;
-  windowsX64Asset: string | null;
-  windowsArm64Asset: string | null;
-}
-
-const GITHUB_RELEASES_URL = "https://api.github.com/repos/getpaseo/paseo/releases?per_page=10";
-const RELEASE_CACHE_KEY = "github-release:v1";
-
-async function fetchLatestReadyRelease(): Promise<ReleaseInfo> {
-  const res = await fetch(GITHUB_RELEASES_URL, {
-    headers: {
-      Accept: "application/vnd.github+json",
-      "User-Agent": "paseo-website",
-    },
-    cf: {
-      cacheEverything: true,
-      cacheTtl: 60,
-      cacheKey: "github-releases-latest",
-    },
-  } as RequestInit);
-  if (!res.ok) throw new Error(`github releases ${res.status}`);
-
-  const releases = (await res.json()) as GitHubRelease[];
-  const ready = releases.find((r) => !r.prerelease && !r.draft && hasRequiredAssets(r));
-  if (!ready) throw new Error("no ready GitHub release found");
-  const win = pickWindowsAssets(ready.assets);
-  const linuxAppImageAsset = pickLinuxAppImageAsset(ready.assets);
-  if (!linuxAppImageAsset) throw new Error("ready release missing Linux AppImage asset");
-  return {
-    version: versionFromTag(ready.tag_name),
-    linuxAppImageAsset,
-    windowsX64Asset: win.x64,
-    windowsArm64Asset: win.arm64,
-  };
-}
-
-function isReleaseInfo(value: unknown): value is ReleaseInfo {
-  if (typeof value !== "object" || value === null) return false;
-  const record = value as Record<string, unknown>;
-  return (
-    typeof record.version === "string" &&
-    /^\d+\.\d+\.\d+(?:-[0-9A-Za-z.-]+)?$/.test(record.version) &&
-    typeof record.linuxAppImageAsset === "string" &&
-    (record.linuxAppImageAsset === "Paseo-x86_64.AppImage" ||
-      new RegExp(`^Paseo-${record.version.replaceAll(".", "\\.")}-x86_64\\.AppImage$`).test(
-        record.linuxAppImageAsset,
-      )) &&
-    (typeof record.windowsX64Asset === "string" || record.windowsX64Asset === null) &&
-    (typeof record.windowsArm64Asset === "string" || record.windowsArm64Asset === null) &&
-    (record.windowsX64Asset === null ||
-      new RegExp(`^Paseo-Setup-${record.version.replaceAll(".", "\\.")}(?:-x64)?\\.exe$`).test(
-        record.windowsX64Asset,
-      )) &&
-    (record.windowsArm64Asset === null ||
-      new RegExp(`^Paseo-Setup-${record.version.replaceAll(".", "\\.")}-arm64\\.exe$`).test(
-        record.windowsArm64Asset,
-      ))
-  );
-}
+import { getWebsiteCacheContext } from "./cloudflare-cache";
+import { getLatestReleaseInfo } from "./latest-release";
 
 export const getLatestRelease = createServerFn({ method: "GET" }).handler(async () => {
-  return getBlockingColdCache({
-    key: RELEASE_CACHE_KEY,
-    isValue: isReleaseInfo,
-    fetchFresh: fetchLatestReadyRelease,
-  });
+  return getLatestReleaseInfo(getWebsiteCacheContext());
 });

packages/website/src/server-entry.ts

@@ -1,10 +1,14 @@
 import startEntry from "@tanstack/react-start/server-entry";
+import { getAndroidVersionCode } from "~/android-version";
 import { getDoc } from "~/docs";
+import { getLatestAndroidVersion } from "~/latest-release";
 import { buildLlmsTxt } from "~/llms";
 
 const CANONICAL_HOST = "paseo.sh";
 
-type FetchArgs = Parameters<typeof startEntry.fetch>;
+interface WebsiteEnv {
+  WEBSITE_CACHE?: KVNamespace;
+}
 
 function markdownResponse(body: string): Response {
   return new Response(body, {
@@ -15,6 +19,15 @@ function markdownResponse(body: string): Response {
   });
 }
 
+function plainTextResponse(body: string): Response {
+  return new Response(body, {
+    headers: {
+      "content-type": "text/plain; charset=utf-8",
+      "cache-control": "public, max-age=300, s-maxage=300",
+    },
+  });
+}
+
 function docSlugFromMarkdownPath(pathname: string): string | null {
   if (pathname === "/docs.md") return "";
   const match = pathname.match(/^\/docs\/(.+)\.md$/);
@@ -22,8 +35,7 @@ function docSlugFromMarkdownPath(pathname: string): string | null {
 }
 
 export default {
-  async fetch(...args: FetchArgs): Promise<Response> {
-    const [request] = args;
+  async fetch(request: Request, env: WebsiteEnv, context: ExecutionContext): Promise<Response> {
     const url = new URL(request.url);
 
     const isLocal = url.hostname === "localhost" || url.hostname === "127.0.0.1";
@@ -43,6 +55,14 @@ export default {
       return markdownResponse(buildLlmsTxt());
     }
 
+    if (url.pathname === "/android-version.txt") {
+      const version = await getLatestAndroidVersion({
+        cache: env.WEBSITE_CACHE ?? null,
+        waitUntil: (promise) => context.waitUntil(promise),
+      });
+      return plainTextResponse(`${getAndroidVersionCode(version)}\n`);
+    }
+
     const slug = docSlugFromMarkdownPath(url.pathname);
     if (slug !== null) {
       const doc = getDoc(slug);
@@ -50,6 +70,6 @@ export default {
       return markdownResponse(doc.content);
     }
 
-    return startEntry.fetch(...args);
+    return startEntry.fetch(request);
   },
 };

packages/website/src/stars.ts

@@ -1,4 +1,5 @@
 import { createServerFn } from "@tanstack/react-start";
+import { getWebsiteCacheContext } from "./cloudflare-cache";
 import { getBlockingColdCache } from "./github-cache";
 
 interface GitHubRepo {
@@ -38,6 +39,7 @@ function isStars(value: unknown): value is string {
 
 export const getStarCount = createServerFn({ method: "GET" }).handler(async () => {
   const stars = await getBlockingColdCache({
+    context: getWebsiteCacheContext(),
     key: STARS_CACHE_KEY,
     isValue: isStars,
     fetchFresh: fetchStarCount,