Add fallback for tar package

Author: Sebastian Benjamin

jbrowse/resources/external/fetch-jbrowse-bundle.mjs

@@ -1,34 +1,57 @@
 import { execSync } from 'node:child_process';
 import { existsSync, mkdirSync, copyFileSync, rmSync } from 'node:fs';
 import { join, resolve } from 'node:path';
-import tar from 'tar';
 
 const ROOT = resolve('.');
 const BUILD = join(ROOT, 'buildCli');
 const OUTDIR = join(ROOT, 'resources', 'external');
 const OUTFILE = join(OUTDIR, 'jbrowse.js');
 
-if (existsSync(BUILD)) rmSync(BUILD, { recursive: true, force: true });
-mkdirSync(BUILD, { recursive: true });
-mkdirSync(OUTDIR, { recursive: true });
+async function extractTgz(tgzPath, cwd) {
+  try {
+    const mod = await import('tar').catch(() => null);
+    const tar = mod?.default ?? mod;
+    if (tar?.x) {
+      await tar.x({ file: tgzPath, cwd });
+      return;
+    }
+  } catch {
+  }
+  execSync(`tar -xzf "${tgzPath}" -C "${cwd}"`, { stdio: 'inherit', shell: true });
+}
 
-console.log('Packing @jbrowse/cli (latest)…');
-const out = execSync('npm pack @jbrowse/cli', { cwd: BUILD, stdio: ['ignore', 'pipe', 'inherit'] }).toString().trim();
+async function main() {
+  if (existsSync(BUILD)) rmSync(BUILD, { recursive: true, force: true });
+  mkdirSync(BUILD, { recursive: true });
+  mkdirSync(OUTDIR, { recursive: true });
 
-// npm outputs the filename on stdout, e.g. "jbrowse-cli-3.6.4.tgz"
-const tgz = join(BUILD, out);
-console.log(`Downloaded: ${tgz}`);
+  console.log('Packing @jbrowse/cli (latest)…');
+  const out = execSync('npm pack @jbrowse/cli', {
+    cwd: BUILD,
+    stdio: ['ignore', 'pipe', 'inherit'],
+    shell: true,
+  })
+    .toString()
+    .trim();
 
-console.log('Extracting tarball…');
-await tar.x({ file: tgz, cwd: BUILD });
+  const tgz = join(BUILD, out);
+  console.log(`Downloaded: ${tgz}`);
 
-const bundled = join(BUILD, 'package', 'bundle', 'index.js');
-if (!existsSync(bundled)) {
-  throw new Error(`bundle/index.js not found at ${bundled}`);
-}
+  console.log('Extracting tarball…');
+  await extractTgz(tgz, BUILD);
 
-copyFileSync(bundled, OUTFILE);
+  const bundled = join(BUILD, 'package', 'bundle', 'index.js');
+  if (!existsSync(bundled)) {
+    throw new Error(`bundle/index.js not found at ${bundled}`);
+  }
 
-rmSync(BUILD, { recursive: true, force: true });
+  copyFileSync(bundled, OUTFILE);
+  console.log(`Copied bundle to ${OUTFILE}`);
+
+  rmSync(BUILD, { recursive: true, force: true });
+}
 
-console.log(`Copied bundle to ${OUTFILE}`);
+main().catch(err => {
+  console.error(err);
+  process.exit(1);
+});