ci: publish cross-platform releases

scripts/write-checksums.cjs

@@ -0,0 +1,53 @@
+const { createHash } = require('node:crypto');
+const { createReadStream, promises: fs } = require('node:fs');
+const path = require('node:path');
+
+const [directory, artifactName] = process.argv.slice(2);
+if (!directory || !artifactName) {
+  console.error('Usage: node scripts/write-checksums.cjs <directory> <artifact-name>');
+  process.exit(1);
+}
+
+const releaseExtensions = new Set([
+  '.AppImage',
+  '.blockmap',
+  '.deb',
+  '.dmg',
+  '.exe',
+  '.zip',
+]);
+
+function hashFile(filePath) {
+  return new Promise((resolve, reject) => {
+    const hash = createHash('sha256');
+    const stream = createReadStream(filePath);
+    stream.on('data', (chunk) => hash.update(chunk));
+    stream.on('error', reject);
+    stream.on('end', () => resolve(hash.digest('hex')));
+  });
+}
+
+async function main() {
+  const entries = await fs.readdir(directory, { withFileTypes: true });
+  const files = entries
+    .filter((entry) => entry.isFile() && releaseExtensions.has(path.extname(entry.name)))
+    .sort((left, right) => left.name.localeCompare(right.name));
+
+  if (files.length === 0) {
+    throw new Error(`No release packages found in ${directory}`);
+  }
+
+  const lines = [];
+  for (const file of files) {
+    lines.push(`${await hashFile(path.join(directory, file.name))}  ${file.name}`);
+  }
+
+  const output = path.join(directory, `SHA256SUMS-${artifactName}.txt`);
+  await fs.writeFile(output, `${lines.join('\n')}\n`, 'ascii');
+  console.log(`Wrote ${output}`);
+}
+
+main().catch((error) => {
+  console.error(error);
+  process.exitCode = 1;
+});