╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ event.zig ────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭89200f97..╮ 89200f97.. see-em: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (623) user
╭────╮ ╭ clone ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╮ │http│ ssh │ │ ╰────╯ ╰ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╯
.. embed/ event/ test/ ui/ command.zig diff3.zig ╭─────────────────────────────────╮ │event.zig │ ╰─────────────────────────────────╯ find.zig fork.zig lib.zig main.zig main_wasm.zig markdown.zig patch.zig progress.zig push.zig search.zig search_commit.zig search_thread.zig serve.zig serve_common.zig serve_http.zig serve_ssh.zig serve_ssh_protocol.zig test.zig testnet.zig try.zig ui.zig web.zig
2321 if (reader.size != value.len) { 2322 return false; 2323 } 2324 2325 var chunk_buffer: [1024]u8 = undefined; 2326 var offset: usize = 0; 2327 while (offset < value.len) { 2328 const chunk_len = @min(chunk_buffer.len, value.len - offset); 2329 try reader.interface.readSliceAll(chunk_buffer[0..chunk_len]); 2330 if (!std.mem.eql(u8, chunk_buffer[0..chunk_len], value[offset .. offset + chunk_len])) { 2331 return false; 2332 } 2333 offset += chunk_len; 2334 } 2335 2336 return true; 2337 } 2338 2339 // 2340 // CommitIterator 2341 // 2342 // differs from xit's ObjectIterator in a few ways: 2343 // 2344 // 1. iterates parents first, rather than children first 2345 // 2. `next` only returns the object id, not the full Object 2346 // 3. stores its temporary state in a file on disk to avoid OOMs 2347 // 2348 2349 pub fn CommitIterator(comptime repo_kind: rp.RepoKind, comptime repo_opts: rp.RepoOpts(repo_kind)) type { 2350 return struct { 2351 const DB = EventDB(repo_opts.hash); 2352 // a plain file is used for the scratch db because each write outside 2353 // a transaction is synced anyway, so buffering would gain nothing 2354 const TempDB = xit.xitdb.Database(.file, hash.HashInt(repo_opts.hash)); 2355 const db_name = "haxy-repo-events.db"; 2356 2357 repo_dir: std.Io.Dir, 2358 db_file: std.Io.File, 2359 db: *TempDB, 2360 // map of each object id to its children 2361 parent_to_children: TempDB.HashMap(.read_write), 2362 // tracking pending parents is necessary because a child can only 2363 // be returned after all of its unconsumed parents have been returned 2364 child_to_pending_parents: TempDB.HashMap(.read_write), 2365 // queue of object ids that are ready to be returned from `next` 2366 ready_queue: TempDB.ArrayList(.read_write), 2367 ready_queue_index: u64, 2368 // the object id at the tip of this branch 2369 newest_object_id: ?[hash.byteLen(repo_opts.hash)]u8, 2370 // the object id furthest back in the history that hasn't been consumed 2371 oldest_object_id: ?[hash.byteLen(repo_opts.hash)]u8, 2372 2373 pub fn init( 2374 state: rp.Repo(repo_kind, repo_opts).State(.read_only), 2375 io: std.Io, 2376 allocator: std.mem.Allocator, 2377 consumed_object_ids: DB.HashMap(.read_only), 2378 ref: rf.Ref, 2379 ) !CommitIterator(repo_kind, repo_opts) { 2380 const db_file = try state.core.repo_dir.createFile(io, db_name, .{ .truncate = true, .lock = .exclusive, .read = true }); 2381 errdefer { 2382 db_file.close(io); 2383 state.core.repo_dir.deleteFile(io, db_name) catch {}; 2384 } 2385 2386 // cursors point at the db, so it needs a stable address 2387 const db_ptr = try allocator.create(TempDB); 2388 errdefer allocator.destroy(db_ptr); 2389 // the db is scratch state that gets deleted after iteration, so 2390 // there is nothing worth fsyncing 2391 db_ptr.* = try TempDB.init(.{ .io = io, .file = db_file, .fsync = false }); 2392 2393 const map = try TempDB.HashMap(.read_write).init(db_ptr.rootCursor()); 2394 2395 const parent_to_children_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "parent->children")); 2396 const parent_to_children = try TempDB.HashMap(.read_write).init(parent_to_children_cursor); 2397 2398 const child_to_pending_parents_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "child->pending-parents")); 2399 const child_to_pending_parents = try TempDB.HashMap(.read_write).init(child_to_pending_parents_cursor); 2400 2401 const ready_queue_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "ready-queue")); 2402 const ready_queue = try TempDB.ArrayList(.read_write).init(ready_queue_cursor); 2403 2404 var self = CommitIterator(repo_kind, repo_opts){ 2405 .repo_dir = state.core.repo_dir, 2406 .db_file = db_file, 2407 .db = db_ptr, 2408 .parent_to_children = parent_to_children, 2409 .child_to_pending_parents = child_to_pending_parents, 2410 .ready_queue = ready_queue, 2411 .ready_queue_index = 0, 2412 .newest_object_id = null, 2413 .oldest_object_id = null, 2414 }; 2415 errdefer self.deinit(io, allocator); 2416 2417 try self.collect(state, io, allocator, consumed_object_ids, ref); 2418 2419 return self; 2420 } 2421 2422 pub fn deinit(self: *CommitIterator(repo_kind, repo_opts), io: std.Io, allocator: std.mem.Allocator) void { 2423 self.db_file.close(io); 2424 self.repo_dir.deleteFile(io, db_name) catch {}; 2425 allocator.destroy(self.db); 2426 } 2427 2428 pub fn next(self: *CommitIterator(repo_kind, repo_opts)) !?[hash.byteLen(repo_opts.hash)]u8 { 2429 if (self.ready_queue_index >= try self.ready_queue.count()) return null; 2430 2431 const oid = try readOidFromList(self.ready_queue.readOnly(), self.ready_queue_index); 2432 self.ready_queue_index += 1; 2433 2434 try self.enqueueChildren(&oid); 2435 return oid; 2436 } 2437 2438 fn collect( 2439 self: *CommitIterator(repo_kind, repo_opts), 2440 state: rp.Repo(repo_kind, repo_opts).State(.read_only), 2441 io: std.Io, 2442 allocator: std.mem.Allocator, 2443 consumed_object_ids: DB.HashMap(.read_only), 2444 ref: rf.Ref, 2445 ) !void { 2446 const map = try TempDB.HashMap(.read_write).init(self.db.rootCursor()); 2447 2448 const walk_queue_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "walk-queue")); 2449 const walk_queue = try TempDB.ArrayList(.read_write).init(walk_queue_cursor); 2450 var walk_queue_index: u64 = 0; 2451 2452 const seen_object_ids_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "seen-object-ids")); 2453 const seen_object_ids = try TempDB.HashSet(.read_write).init(seen_object_ids_cursor); 2454 2455 const head_oid_hex = (try rf.readRecur(repo_kind, repo_opts, state, io, .{ .ref = ref })) orelse return error.OidNotFound; 2456 var head_oid: [hash.byteLen(repo_opts.hash)]u8 = undefined; 2457 _ = try std.fmt.hexToBytes(&head_oid, &head_oid_hex); 2458 try walk_queue.append(.{ .bytes = &head_oid }); 2459 2460 while (walk_queue_index < try walk_queue.count()) { 2461 const oid = try readOidFromList(walk_queue.readOnly(), walk_queue_index); 2462 const oid_int = hash.bytesToInt(repo_opts.hash, &oid); 2463 2464 walk_queue_index += 1; 2465 2466 // if we've seen this object id, skip it 2467 if (null != try seen_object_ids.getCursor(oid_int)) { 2468 continue; 2469 } 2470 2471 try seen_object_ids.put(oid_int, .{ .bytes = &oid }); 2472 2473 var commit_object = try obj.Object(repo_kind, repo_opts).init(state, io, allocator, &std.fmt.bytesToHex(oid, .lower)); 2474 defer commit_object.deinit(); 2475 2476 // if this object id has already been consumed, skip it 2477 if (null != try consumed_object_ids.getCursor(oid_int)) { 2478 continue; 2479 } 2480 2481 if (self.newest_object_id == null) self.newest_object_id = oid; 2482 self.oldest_object_id = oid; 2483 2484 const parent_oids = commit_object.content.commit.metadata.parent_oids orelse return error.ParentOidsNotFound; 2485 var pending_parent_count: u64 = 0; 2486 for (parent_oids) |*parent_oid| { 2487 var parent_oid_bytes: [hash.byteLen(repo_opts.hash)]u8 = undefined; 2488 _ = try std.fmt.hexToBytes(&parent_oid_bytes, parent_oid); 2489 const parent_oid_int = hash.bytesToInt(repo_opts.hash, &parent_oid_bytes); 2490 2491 // if this object id has already been consumed, skip it 2492 if (null != try consumed_object_ids.getCursor(parent_oid_int)) { 2493 continue; 2494 } 2495 2496 // if this object id hasn't already been seen, add it to the walk queue 2497 if (null == try seen_object_ids.getCursor(parent_oid_int)) { 2498 try walk_queue.append(.{ .bytes = &parent_oid_bytes }); 2499 } 2500 2501 const children_cursor = try self.parent_to_children.putCursor(parent_oid_int); 2502 const children = try TempDB.HashSet(.read_write).init(children_cursor); 2503 try children.put(oid_int, .{ .bytes = &oid }); 2504 pending_parent_count += 1; 2505 } 2506 2507 if (pending_parent_count == 0) { 2508 try self.ready_queue.append(.{ .bytes = &oid }); 2509 } else { 2510 try self.child_to_pending_parents.put(oid_int, .{ .uint = pending_parent_count }); 2511 } 2512 } 2513 } 2514 2515 fn enqueueChildren(self: *CommitIterator(repo_kind, repo_opts), oid: *const [hash.byteLen(repo_opts.hash)]u8) !void { 2516 const oid_int = hash.bytesToInt(repo_opts.hash, oid); 2517 const children_cursor = try self.parent_to_children.getCursor(oid_int) orelse return; 2518 const children = try TempDB.HashSet(.read_only).init(children_cursor); 2519 var children_iter = try children.iterator(); 2520 2521 while (try children_iter.next()) |*child_cursor| { 2522 const kv_pair = try child_cursor.readKeyValuePair(); 2523 const child_oid_int = kv_pair.hash; 2524 const pending_parent_cursor = try self.child_to_pending_parents.getCursor(child_oid_int) orelse return error.CursorNotFound; 2525 const pending_parent_count = try pending_parent_cursor.readUint(); 2526 2527 if (pending_parent_count <= 1) { 2528 _ = try self.child_to_pending_parents.remove(child_oid_int); 2529 const child_oid = hash.intToBytes(hash.HashInt(repo_opts.hash), child_oid_int); 2530 try self.ready_queue.append(.{ .bytes = &child_oid }); 2531 } else { 2532 try self.child_to_pending_parents.put(child_oid_int, .{ .uint = pending_parent_count - 1 }); 2533 } 2534 } 2535 } 2536 2537 fn readOidFromList(list: TempDB.ArrayList(.read_only), index: u64) ![hash.byteLen(repo_opts.hash)]u8 { 2538 const oid_cursor = try list.getCursor(index) orelse return error.CursorNotFound; 2539 var oid: [hash.byteLen(repo_opts.hash)]u8 = undefined; 2540 _ = try oid_cursor.readBytes(&oid); 2541 return oid; 2542 } 2543 }; 2544 } 2545