From 7c37672ae931a0e609ab4654d45f31ccee10c3f9 Mon Sep 17 00:00:00 2001
From: Ilya Kreymer <ikreymer@gmail.com>
Date: Sat, 25 Oct 2025 15:41:31 -0700
Subject: [PATCH] add removing option to also remove unused crawls if doing a
 full sync, disable by default

---
 src/indexer.ts    | 32 +++++++++++++++++++++++-----
 src/util/state.ts | 54 ++++++++++++++++++++++++++++++++++++++++++-----
 2 files changed, 76 insertions(+), 10 deletions(-)

diff --git a/src/indexer.ts b/src/indexer.ts
index f08e59ca..ac31f6fb 100644
--- a/src/indexer.ts
+++ b/src/indexer.ts
@@ -9,6 +9,7 @@ import { initRedisWaitForSuccess } from "./util/redis.js";
 import { AsyncIterReader } from "warcio";
 import { RedisDedupeIndex } from "./util/state.js";
 import { basename } from "node:path";
+import { sleep } from "./util/timing.js";
 
 export type DedupeIndexEntry = {
   name: string;
@@ -42,6 +43,13 @@ export class CrawlIndexer {
           type: "string",
           required: false,
         },
+
+        removing: {
+          describe: "If set, also remove unsued crawls/hashes from index",
+          type: "boolean",
+          required: false,
+          default: false,
+        },
       })
       .parseSync();
   }
@@ -62,16 +70,24 @@ export class CrawlIndexer {
 
     for await (const entry of this.iterWACZ({
       url: params.sourceUrl,
-      name: params.sourceCrawlId || params.sourceUrl,
+      name: basename(params.sourceUrl),
+      crawlId: params.sourceCrawlId,
     })) {
       await dedupeIndex.queueImportSource(entry.name, JSON.stringify(entry));
+      if (params.removing && entry.crawlId) {
+        await dedupeIndex.markNotRemoved(entry.crawlId);
+      }
     }
 
     let count = 0;
+    let total = 0;
     let res;
 
     while ((res = await dedupeIndex.nextQueuedImportSource())) {
-      const { name, entry, total } = res;
+      const { name, entry, remaining } = res;
+      if (!total) {
+        total = remaining;
+      }
       const { url, crawlId, size, hash } = JSON.parse(
         entry,
       ) as DedupeIndexEntry;
@@ -107,7 +123,15 @@ export class CrawlIndexer {
       await dedupeIndex.markImportSourceDone(name, crawlIdReal);
     }
 
+    if (params.removing) {
+      const removeset = await dedupeIndex.getRemoveSet();
+      if (removeset.size > 0) {
+        await dedupeIndex.removeCrawlIds(removeset);
+      }
+    }
+
     logger.info("Done!");
+    await sleep(30);
     await dedupeIndex.markImportFinishedTS();
     process.exit(ExitCodes.Success);
   }
@@ -180,7 +204,6 @@ export class CrawlIndexer {
   }
 
   async *iterWACZ(entry: DedupeIndexEntry): AsyncIterable<DedupeIndexEntry> {
-    const { name } = entry;
     let { url } = entry;
     let path = url;
 
@@ -191,8 +214,7 @@ export class CrawlIndexer {
     }
 
     if (path.endsWith(".wacz")) {
-      console.log({ ...entry, name: basename(name || url) });
-      yield { ...entry, name: basename(name || url) };
+      yield entry;
     } else if (path.endsWith(".json")) {
       if (!url.startsWith("http://") && !url.startsWith("https://")) {
         const blob = await openAsBlob(url);
diff --git a/src/util/state.ts b/src/util/state.ts
index 2a91ae48..6a8de1ba 100644
--- a/src/util/state.ts
+++ b/src/util/state.ts
@@ -263,12 +263,12 @@ export class RedisDedupeIndex {
     for await (const hashes of this.dedupeRedis.hscanStream(
       `h:${this.crawlId}`,
     )) {
-      let value = false;
+      let isValue = false;
       for (const hash of hashes) {
-        if (!value) {
+        if (!isValue) {
           await this.dedupeRedis.hsetnx(DUPE_ALL_HASH_KEY, hash, this.crawlId);
         }
-        value = !value;
+        isValue = !isValue;
       }
     }
 
@@ -371,14 +371,58 @@ export class RedisDedupeIndex {
 
     await this.dedupeRedis.lrem(this.pendingQ, 1, res);
     const { name } = JSON.parse(res);
-    const total = (await this.dedupeRedis.llen(this.sourceQ)) + 1;
+    const remaining = (await this.dedupeRedis.llen(this.sourceQ)) + 1;
     await this.dedupeRedis.setex(this.pendingPrefix + name, "1", 300);
-    return { name, entry: res, total };
+    return { name, entry: res, remaining };
   }
 
   async markImportFinishedTS() {
     await this.dedupeRedis.set("last_update_ts", new Date().toISOString());
   }
+
+  // REMOVE ON IMPORT
+
+  async markNotRemoved(crawlId: string) {
+    await this.dedupeRedis.sadd("noremove", crawlId);
+  }
+
+  async getRemoveSet() {
+    const removeSet = await this.dedupeRedis.sdiff(DUPE_ALL_CRAWLS, "noremove");
+    await this.dedupeRedis.del("noremove");
+    return new Set<string>(removeSet);
+  }
+
+  async removeCrawlIds(toRemove: Set<string>) {
+    for await (const hashes of this.dedupeRedis.hscanStream(
+      DUPE_ALL_HASH_KEY,
+    )) {
+      let isValue = false;
+      let key = "";
+      for (const hash of hashes) {
+        if (!isValue) {
+          key = hash;
+        }
+        if (key && isValue && toRemove.has(hash)) {
+          await this.dedupeRedis.hdel(DUPE_ALL_HASH_KEY, key);
+        }
+        isValue = !isValue;
+      }
+    }
+
+    for (const crawlId of toRemove) {
+      const allWACZ = await this.dedupeRedis.lrange(`c:${crawlId}:wacz`, 0, -1);
+      for (const waczdata of allWACZ) {
+        try {
+          const { filename } = JSON.parse(waczdata);
+          await this.dedupeRedis.srem(this.sourceDone, filename);
+        } catch (e) {
+          // ignore
+        }
+      }
+      await this.dedupeRedis.del(`h:${crawlId}`, `c:${crawlId}:wacz`);
+      await this.dedupeRedis.srem(DUPE_ALL_CRAWLS, crawlId);
+    }
+  }
 }
 
 // ============================================================================