feat: add "lts" version option (#97)

(cherry picked from commit a1496dd8d9)

.github/workflows/test.yml

@@ -23,6 +23,7 @@ jobs:
           - "~1.32"
           - "b290fd01f3f5d32f9d010fc719ced0240759c049"
           - "rc"
+          - "lts"
 
     steps:
       - uses: actions/checkout@v3
@@ -111,5 +112,5 @@ jobs:
       - name: Build code
         run: deno run -A scripts/build.ts
 
-      - name: Assert no git changes
+      - name: Assert no git changes (run `deno task build` if this fails)
         run: git diff --quiet

README.md

@@ -70,6 +70,14 @@ Targets the latest major, minor and patch version of Deno.
     deno-version: 2.0.0-rc.1
 ```
 
+### Latest LTS
+
+```yaml
+- uses: denoland/setup-deno@v2
+  with:
+    deno-version: lts
+```
+
 ### Version from file
 
 The extension can also automatically read the version file from

action.yml

@@ -6,7 +6,7 @@ branding:
   color: "gray-dark"
 inputs:
   deno-version:
-    description: The Deno version to install. Can be a semver version of a stable release, "canary" for the latest canary, or the Git hash of a specific canary release.
+    description: The Deno version to install. Can be a semver version of a stable release, "canary" for the latest canary, "lts" for the latest LTS, or the Git hash of a specific canary release.
     default: "2.x"
   deno-version-file:
     description: File containing the Deno version to install such as .dvmrc or .tool-versions.

dist/main.mjs

@@ -36389,6 +36389,10 @@ function parseVersionRange(version) {
 		range: "latest",
 		kind: "stable"
 	};
+	if (version === "lts") return {
+		range: "latest",
+		kind: "lts"
+	};
 	if (GIT_HASH_RE.test(version)) return {
 		range: version,
 		kind: "canary"
@@ -36410,6 +36414,7 @@ function getDenoVersionFromFile(versionFilePath) {
 function resolveVersion({ range, kind }) {
 	if (kind === "canary") return resolveCanary(range);
 	else if (kind === "rc") return resolveReleaseCandidate();
+	else if (kind === "lts") return resolveLTS();
 	else return resolveRelease(range);
 }
 async function resolveCanary(range) {
@@ -36436,6 +36441,16 @@ async function resolveReleaseCandidate() {
 		kind: "rc"
 	};
 }
+async function resolveLTS() {
+	const res = await fetchWithRetries("https://dl.deno.land/release-lts-latest.txt");
+	if (res.status !== 200) throw new Error("Failed to fetch LTS version info from dl.deno.land. Please try again later.");
+	const version = import_semver.default.clean((await res.text()).trim());
+	if (version === null) throw new Error("Failed to parse LTS version.");
+	return {
+		version,
+		kind: "lts"
+	};
+}
 async function resolveRelease(range) {
 	if (range === "latest") {
 		const res = await fetchWithRetries("https://dl.deno.land/release-latest.txt");
@@ -38230,6 +38245,7 @@ async function install(version) {
 			url = `https://dl.deno.land/release/v${version.version}/${zip}`;
 			break;
 		case "stable":
+		case "lts":
 			url = `https://github.com/denoland/deno/releases/download/v${version.version}/${zip}`;
 			break;
 	}

src/install.ts

@@ -28,6 +28,7 @@ export async function install(version: Version) {
       url = `https://dl.deno.land/release/v${version.version}/${zip}`;
       break;
     case "stable":
+    case "lts":
       url =
         `https://github.com/denoland/deno/releases/download/v${version.version}/${zip}`;
       break;

src/version.ts

@@ -9,12 +9,12 @@ const GIT_HASH_RE = /^[0-9a-fA-F]{40}$/;
 
 export interface VersionRange {
   range: string;
-  kind: "canary" | "rc" | "stable";
+  kind: "canary" | "rc" | "stable" | "lts";
 }
 
 export interface Version {
   version: string;
-  kind: "canary" | "rc" | "stable";
+  kind: "canary" | "rc" | "stable" | "lts";
 }
 
 /** Parses the version from the user into a structure */
@@ -36,6 +36,10 @@ export function parseVersionRange(
     return { range: "latest", kind: "stable" };
   }
 
+  if (version === "lts") {
+    return { range: "latest", kind: "lts" };
+  }
+
   if (GIT_HASH_RE.test(version)) {
     return { range: version, kind: "canary" };
   }
@@ -82,6 +86,8 @@ export function resolveVersion(
   } else if (kind === "rc") {
     // range is always "latest"
     return resolveReleaseCandidate();
+  } else if (kind === "lts") {
+    return resolveLTS();
   } else {
     return resolveRelease(range);
   }
@@ -120,6 +126,22 @@ async function resolveReleaseCandidate(): Promise<Version | null> {
   return { version, kind: "rc" };
 }
 
+async function resolveLTS(): Promise<Version | null> {
+  const res = await fetchWithRetries(
+    "https://dl.deno.land/release-lts-latest.txt",
+  );
+  if (res.status !== 200) {
+    throw new Error(
+      "Failed to fetch LTS version info from dl.deno.land. Please try again later.",
+    );
+  }
+  const version = semver.clean((await res.text()).trim());
+  if (version === null) {
+    throw new Error("Failed to parse LTS version.");
+  }
+  return { version, kind: "lts" };
+}
+
 async function resolveRelease(range: string): Promise<Version | null> {
   if (range === "latest") {
     const res = await fetchWithRetries(