Rebuild: tools to rank groups by real span (GROUP's low) and sample how full they are

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tools/group_sizes.ts

@@ -0,0 +1,36 @@
+/**
+ * Every group matching a pattern with its real span: LIST ACTIVE for the
+ * names (its low is always 2 on Eweka), GROUP per group for the real low and
+ * count. TSV, largest span first: rank, name, low, high, span, count.
+ *
+ *   node --env-file=.env --import=@poppinss/ts-exec tools/group_sizes.ts 'alt.binaries.*' [connections] > groups.tsv
+ */
+import { XoverClient } from '#lib/nntp/index'
+
+const pattern = process.argv[2] ?? 'alt.binaries.*'
+const connections = Number(process.argv[3] ?? 4)
+const env = process.env
+const connect = () =>
+  XoverClient.connect({ host: env.NNTP_HOST!, port: Number(env.NNTP_PORT ?? 563), user: env.NNTP_USER, password: env.NNTP_PASSWORD, secure: (env.NNTP_SECURE ?? 'true') !== 'false', compress: true, timeoutMs: 60_000 })
+
+const first = await connect()
+const names = (await first.listActive(pattern)).map((g) => g.name)
+const queue = [...names]
+const out: { name: string; low: number; high: number; count: number }[] = []
+await Promise.all(
+  Array.from({ length: connections }, async (_, i) => {
+    const client = i === 0 ? first : await connect()
+    while (queue.length) {
+      const name = queue.shift()!
+      try {
+        const g = await client.group(name)
+        out.push({ name, ...g })
+      } catch (error: any) {
+        console.error(`${name}: ${error.message}`)
+      }
+    }
+    client.close()
+  })
+)
+out.sort((a, b) => b.high - b.low - (a.high - a.low))
+out.forEach((g, i) => console.log([i + 1, g.name, g.low, g.high, g.high - g.low, g.count].join('\t')))