Use gzip for release assets so they can easily be extracted from node

cli/npm/.gitignore

@@ -1,4 +1,3 @@
 tree-sitter
 tree-sitter.exe
-*.tar.gz
-*.zip
+*.gz

cli/npm/install.js

@@ -1,12 +1,11 @@
 #!/usr/bin/env node
 
 const fs = require('fs');
+const zlib = require('zlib');
 const https = require('https');
-const execFileSync = require('child_process').execFileSync;
 const packageJSON = require('./package.json');
 
 // Determine the URL of the file.
-const isWindows = process.platform === 'win32';
 const platformName = {
   'darwin': 'osx',
   'linux': 'linux',
@@ -15,48 +14,41 @@ const platformName = {
 if (!platformName) {
   throw new Error(`Cannot install tree-sitter-cli for platform ${process.platform}`);
 }
+
+const archName = {
+  'x64': 'x64',
+  'x86': 'x86',
+  'ia32': 'x86'
+}[process.arch];
+if (!archName) {
+  throw new Error(`Cannot install tree-sitter-cli for architecture ${process.arch}`);
+}
+
 const releaseURL = `https://github.com/tree-sitter/tree-sitter/releases/download/${packageJSON.version}`;
-const assetExtension = isWindows ? 'zip' : 'tar.gz';
-const assetName = `tree-sitter-${platformName}-${process.arch}.${assetExtension}`;
+const assetName = `tree-sitter-${platformName}-${archName}.gz`;
 const assetURL = `${releaseURL}/${assetName}`;
 
 // Remove previously-downloaded files.
-const executableName = isWindows ? 'tree-sitter.exe' : 'tree-sitter';
+const executableName = process.platform === 'win32' ? 'tree-sitter.exe' : 'tree-sitter';
 if (fs.existsSync(executableName)) {
   fs.unlinkSync(executableName);
 }
-if (fs.existsSync(assetName)) {
-  fs.unlinkSync(assetName);
-}
 
 // Download the compressed file.
 console.log(`Downloading ${assetURL}`);
-const file = fs.createWriteStream(assetName);
+const file = fs.createWriteStream(executableName);
 get(assetURL, response => {
   if (response.statusCode > 299) {
     throw new Error([
       'Download failed',
       '',
-      `url: ${url}`,
+      `url: ${assetURL}`,
       `status: ${response.statusCode}`,
       `headers: ${JSON.stringify(response.headers, null, 2)}`,
       '',
     ].join('\n'));
   }
-
-  response.pipe(file);
-});
-
-// Extract the file.
-file.on('finish', () => {
-  console.log(`Extracting ${assetName}`);
-  if (isWindows) {
-    execFileSync('7z', ['e', assetName]);
-  } else {
-    execFileSync('tar', ['xzf', assetName]);
-  }
-  fs.unlinkSync(assetName);
-  console.log(`Done`);
+  response.pipe(zlib.createGunzip()).pipe(file);
 });
 
 // Follow redirects.

cli/npm/package.json

@@ -14,7 +14,7 @@
   ],
   "main": "lib/api/index.js",
   "scripts": {
-    "install": "./install.js"
+    "install": "install.js"
   },
   "bin": {
     "tree-sitter": "tree-sitter"