nix (#7)

npm
cargo

npm/deskctl-cli/scripts/postinstall.js

@@ -0,0 +1,49 @@
+const fs = require("node:fs");
+
+const {
+  checksumsUrl,
+  checksumForAsset,
+  download,
+  ensureVendorDir,
+  installLocalBinary,
+  readPackageJson,
+  releaseAssetUrl,
+  releaseTag,
+  sha256,
+  supportedTarget,
+  vendorBinaryPath
+} = require("./support");
+
+async function main() {
+  const pkg = readPackageJson();
+  const target = supportedTarget();
+  const targetPath = vendorBinaryPath(target);
+
+  ensureVendorDir();
+
+  if (process.env.DESKCTL_BINARY_PATH) {
+    installLocalBinary(process.env.DESKCTL_BINARY_PATH, targetPath);
+    return;
+  }
+
+  const tag = releaseTag(pkg);
+  const assetUrl = releaseAssetUrl(tag, target.assetName);
+  const checksumText = (await download(checksumsUrl(tag))).toString("utf8");
+  const expectedSha = checksumForAsset(checksumText, target.assetName);
+  const asset = await download(assetUrl);
+  const actualSha = sha256(asset);
+
+  if (actualSha !== expectedSha) {
+    throw new Error(
+      `Checksum mismatch for ${target.assetName}. Expected ${expectedSha}, got ${actualSha}.`
+    );
+  }
+
+  fs.writeFileSync(targetPath, asset);
+  fs.chmodSync(targetPath, 0o755);
+}
+
+main().catch((error) => {
+  console.error(`deskctl-cli install failed: ${error.message}`);
+  process.exit(1);
+});