fix: allow specifying the vcpkg version

src/vcpkg/vcpkg.ts

@@ -1,5 +1,5 @@
 import { grantUserWriteAccess } from "admina"
-import { notice } from "ci-log"
+import { info, notice } from "ci-log"
 import { execaSync } from "execa"
 import { pathExists } from "path-exists"
 import { addShExt, addShRelativePrefix, dirname, join } from "patha"
@@ -16,7 +16,7 @@ import { setupPacmanPack } from "../utils/setup/setupPacmanPack"
 let hasVCPKG = false
 
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
-export async function setupVcpkg(_version: string, setupDir: string, _arch: string): Promise<InstallationInfo> {
+export async function setupVcpkg(version: string, setupDir: string, _arch: string): Promise<InstallationInfo> {
   if (!hasVCPKG || which.sync("vcpkg", { nothrow: true }) === null) {
     if (process.platform === "linux") {
       // vcpkg download and extraction dependencies
@@ -50,12 +50,23 @@ export async function setupVcpkg(_version: string, setupDir: string, _arch: stri
       }
     }
 
+    // clone if not already exists
     if (!(await pathExists(join(setupDir, addShExt("bootstrap-vcpkg", ".bat"))))) {
       execaSync("git", ["clone", "https://github.com/microsoft/vcpkg"], { cwd: dirname(setupDir), stdio: "inherit" })
     } else {
-      notice(`Vcpkg folder already exists at ${setupDir}. This might mean that ~/vcpkg is restored from the cache.`)
+      notice(`Vcpkg folder already exists at ${setupDir}. Skipping the clone`)
     }
 
+    // if version specified, checkout the version
+    if (!(version in ["", "true"])) {
+      info(`Checking out vcpkg version ${version}`)
+      execaSync("git", ["checkout", version], {
+        cwd: setupDir,
+        stdio: "inherit",
+      })
+    }
+
+    // bootstrap vcpkg
     execaSync(addShExt(addShRelativePrefix("bootstrap-vcpkg"), ".bat"), {
       cwd: setupDir,
       shell: true,