╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ event.zig ────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭03aedad0..╮ 03aedad0.. haxy: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues patches new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (701) 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 notify.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
2805 try upsertField(DB, hash_kind, variants, @tagName(tag), @TypeOf(payload), payload); 2806 } 2807 }, 2808 }, 2809 .optional => |optional_info| { 2810 // a missing key is null 2811 if (value) |child| { 2812 try upsertField(DB, hash_kind, map, field_name, optional_info.child, child); 2813 } else { 2814 _ = try map.remove(key); 2815 } 2816 }, 2817 .@"struct" => try upsert( 2818 Field, 2819 DB, 2820 hash_kind, 2821 try DB.HashMap(.read_write).init(try map.putCursor(key)), 2822 value, 2823 ), 2824 else => @compileError("unsupported upsert field type: " ++ @typeName(Field)), 2825 } 2826 } 2827 2828 fn upsertBytes( 2829 comptime DB: type, 2830 comptime hash_kind: hash.HashKind, 2831 map: DB.HashMap(.read_write), 2832 key: hash.HashInt(hash_kind), 2833 value: []const u8, 2834 ) !void { 2835 var existing_cursor_maybe = try map.getCursor(key); 2836 if (existing_cursor_maybe) |*existing_cursor| { 2837 if (try bytesEqual(DB, existing_cursor, value)) { 2838 return; 2839 } 2840 } 2841 2842 try map.put(key, .{ .bytes = value }); 2843 } 2844 2845 fn bytesEqual( 2846 comptime DB: type, 2847 cursor: *DB.Cursor(.read_only), 2848 value: []const u8, 2849 ) !bool { 2850 switch (cursor.slot().tag) { 2851 .bytes, .short_bytes => {}, 2852 else => return false, 2853 } 2854 var read_buffer: [1024]u8 = undefined; 2855 var reader = try cursor.reader(&read_buffer); 2856 if (reader.size != value.len) { 2857 return false; 2858 } 2859 2860 var chunk_buffer: [1024]u8 = undefined; 2861 var offset: usize = 0; 2862 while (offset < value.len) { 2863 const chunk_len = @min(chunk_buffer.len, value.len - offset); 2864 try reader.interface.readSliceAll(chunk_buffer[0..chunk_len]); 2865 if (!std.mem.eql(u8, chunk_buffer[0..chunk_len], value[offset .. offset + chunk_len])) { 2866 return false; 2867 } 2868 offset += chunk_len; 2869 } 2870 2871 return true; 2872 } 2873 2874 // 2875 // CommitIterator 2876 // 2877 // differs from xit's ObjectIterator in a few ways: 2878 // 2879 // 1. iterates parents first, rather than children first 2880 // 2. `next` only returns the object id, not the full Object 2881 // 3. stores its temporary state in a file on disk to avoid OOMs 2882 // 2883 2884 pub fn CommitIterator(comptime repo_kind: rp.RepoKind, comptime repo_opts: rp.RepoOpts(repo_kind)) type { 2885 return struct { 2886 const DB = EventDB(repo_opts.hash); 2887 // a plain file is used for the scratch db because each write outside 2888 // a transaction is synced anyway, so buffering would gain nothing 2889 const TempDB = xit.xitdb.Database(.file, hash.HashInt(repo_opts.hash)); 2890 const db_name = "haxy-repo-events.db"; 2891 2892 repo_dir: std.Io.Dir, 2893 db_file: std.Io.File, 2894 db: *TempDB, 2895 // map of each object id to its children 2896 parent_to_children: TempDB.HashMap(.read_write), 2897 // tracking pending parents is necessary because a child can only 2898 // be returned after all of its unconsumed parents have been returned 2899 child_to_pending_parents: TempDB.HashMap(.read_write), 2900 // queue of object ids that are ready to be returned from `next` 2901 ready_queue: TempDB.ArrayList(.read_write), 2902 ready_queue_index: u64, 2903 // the object id at the tip of this branch 2904 newest_object_id: ?[hash.byteLen(repo_opts.hash)]u8, 2905 // the object id furthest back in the history that hasn't been consumed 2906 oldest_object_id: ?[hash.byteLen(repo_opts.hash)]u8, 2907 2908 pub fn init( 2909 state: rp.Repo(repo_kind, repo_opts).State(.read_only), 2910 io: std.Io, 2911 allocator: std.mem.Allocator, 2912 consumed_object_ids: DB.HashMap(.read_only), 2913 ref: rf.Ref, 2914 ) !CommitIterator(repo_kind, repo_opts) { 2915 const db_file = try state.core.repo_dir.createFile(io, db_name, .{ .truncate = true, .lock = .exclusive, .read = true }); 2916 errdefer { 2917 db_file.close(io); 2918 state.core.repo_dir.deleteFile(io, db_name) catch {}; 2919 } 2920 2921 // cursors point at the db, so it needs a stable address 2922 const db_ptr = try allocator.create(TempDB); 2923 errdefer allocator.destroy(db_ptr); 2924 // the db is scratch state that gets deleted after iteration, so 2925 // there is nothing worth fsyncing 2926 db_ptr.* = try TempDB.init(.{ .io = io, .file = db_file, .fsync = false }); 2927 2928 const map = try TempDB.HashMap(.read_write).init(db_ptr.rootCursor()); 2929 2930 const parent_to_children_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "parent->children")); 2931 const parent_to_children = try TempDB.HashMap(.read_write).init(parent_to_children_cursor); 2932 2933 const child_to_pending_parents_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "child->pending-parents")); 2934 const child_to_pending_parents = try TempDB.HashMap(.read_write).init(child_to_pending_parents_cursor); 2935 2936 const ready_queue_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "ready-queue")); 2937 const ready_queue = try TempDB.ArrayList(.read_write).init(ready_queue_cursor); 2938 2939 var self = CommitIterator(repo_kind, repo_opts){ 2940 .repo_dir = state.core.repo_dir, 2941 .db_file = db_file, 2942 .db = db_ptr, 2943 .parent_to_children = parent_to_children, 2944 .child_to_pending_parents = child_to_pending_parents, 2945 .ready_queue = ready_queue, 2946 .ready_queue_index = 0, 2947 .newest_object_id = null, 2948 .oldest_object_id = null, 2949 }; 2950 errdefer self.deinit(io, allocator); 2951 2952 try self.collect(state, io, allocator, consumed_object_ids, ref); 2953 2954 return self; 2955 } 2956 2957 pub fn deinit(self: *CommitIterator(repo_kind, repo_opts), io: std.Io, allocator: std.mem.Allocator) void { 2958 self.db_file.close(io); 2959 self.repo_dir.deleteFile(io, db_name) catch {}; 2960 allocator.destroy(self.db); 2961 } 2962 2963 pub fn next(self: *CommitIterator(repo_kind, repo_opts)) !?[hash.byteLen(repo_opts.hash)]u8 { 2964 if (self.ready_queue_index >= try self.ready_queue.count()) return null; 2965 2966 const oid = try readOidFromList(self.ready_queue.readOnly(), self.ready_queue_index); 2967 self.ready_queue_index += 1; 2968 2969 try self.enqueueChildren(&oid); 2970 return oid; 2971 } 2972 2973 fn collect( 2974 self: *CommitIterator(repo_kind, repo_opts), 2975 state: rp.Repo(repo_kind, repo_opts).State(.read_only), 2976 io: std.Io, 2977 allocator: std.mem.Allocator, 2978 consumed_object_ids: DB.HashMap(.read_only), 2979 ref: rf.Ref, 2980 ) !void { 2981 const map = try TempDB.HashMap(.read_write).init(self.db.rootCursor()); 2982 2983 const walk_queue_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "walk-queue")); 2984 const walk_queue = try TempDB.ArrayList(.read_write).init(walk_queue_cursor); 2985 var walk_queue_index: u64 = 0; 2986 2987 const seen_object_ids_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "seen-object-ids")); 2988 const seen_object_ids = try TempDB.HashSet(.read_write).init(seen_object_ids_cursor); 2989 2990 const head_oid_hex = (try rf.readRecur(repo_kind, repo_opts, state, io, .{ .ref = ref })) orelse return error.OidNotFound; 2991 var head_oid: [hash.byteLen(repo_opts.hash)]u8 = undefined; 2992 _ = try std.fmt.hexToBytes(&head_oid, &head_oid_hex); 2993 try walk_queue.append(.{ .bytes = &head_oid }); 2994 2995 while (walk_queue_index < try walk_queue.count()) { 2996 const oid = try readOidFromList(walk_queue.readOnly(), walk_queue_index); 2997 const oid_int = hash.bytesToInt(repo_opts.hash, &oid); 2998 2999 walk_queue_index += 1; 3000 3001 // if we've seen this object id, skip it 3002 if (null != try seen_object_ids.getCursor(oid_int)) { 3003 continue; 3004 } 3005 3006 try seen_object_ids.put(oid_int, .{ .bytes = &oid }); 3007 3008 var commit_object = try obj.Object(repo_kind, repo_opts).init(state, io, allocator, &std.fmt.bytesToHex(oid, .lower)); 3009 defer commit_object.deinit(); 3010 3011 // if this object id has already been consumed, skip it 3012 if (null != try consumed_object_ids.getCursor(oid_int)) { 3013 continue; 3014 } 3015 3016 if (self.newest_object_id == null) self.newest_object_id = oid; 3017 self.oldest_object_id = oid; 3018 3019 const parent_oids = commit_object.content.commit.metadata.parent_oids orelse return error.ParentOidsNotFound; 3020 var pending_parent_count: u64 = 0; 3021 for (parent_oids) |*parent_oid| { 3022 var parent_oid_bytes: [hash.byteLen(repo_opts.hash)]u8 = undefined; 3023 _ = try std.fmt.hexToBytes(&parent_oid_bytes, parent_oid); 3024 const parent_oid_int = hash.bytesToInt(repo_opts.hash, &parent_oid_bytes); 3025 3026 // if this object id has already been consumed, skip it 3027 if (null != try consumed_object_ids.getCursor(parent_oid_int)) { 3028 continue; 3029 } 3030 3031 // if this object id hasn't already been seen, add it to the walk queue 3032 if (null == try seen_object_ids.getCursor(parent_oid_int)) { 3033 try walk_queue.append(.{ .bytes = &parent_oid_bytes }); 3034 } 3035 3036 const children_cursor = try self.parent_to_children.putCursor(parent_oid_int); 3037 const children = try TempDB.HashSet(.read_write).init(children_cursor); 3038 try children.put(oid_int, .{ .bytes = &oid }); 3039 pending_parent_count += 1; 3040 } 3041 3042 if (pending_parent_count == 0) { 3043 try self.ready_queue.append(.{ .bytes = &oid }); 3044 } else { 3045 try self.child_to_pending_parents.put(oid_int, .{ .uint = pending_parent_count }); 3046 } 3047 } 3048 } 3049 3050 fn enqueueChildren(self: *CommitIterator(repo_kind, repo_opts), oid: *const [hash.byteLen(repo_opts.hash)]u8) !void { 3051 const oid_int = hash.bytesToInt(repo_opts.hash, oid); 3052 const children_cursor = try self.parent_to_children.getCursor(oid_int) orelse return; 3053 const children = try TempDB.HashSet(.read_only).init(children_cursor); 3054 var children_iter = try children.iterator(); 3055 3056 while (try children_iter.next()) |*child_cursor| { 3057 const kv_pair = try child_cursor.readKeyValuePair(); 3058 const child_oid_int = kv_pair.hash; 3059 const pending_parent_cursor = try self.child_to_pending_parents.getCursor(child_oid_int) orelse return error.CursorNotFound; 3060 const pending_parent_count = try pending_parent_cursor.readUint(); 3061 3062 if (pending_parent_count <= 1) { 3063 _ = try self.child_to_pending_parents.remove(child_oid_int); 3064 const child_oid = hash.intToBytes(hash.HashInt(repo_opts.hash), child_oid_int); 3065 try self.ready_queue.append(.{ .bytes = &child_oid }); 3066 } else { 3067 try self.child_to_pending_parents.put(child_oid_int, .{ .uint = pending_parent_count - 1 }); 3068 } 3069 } 3070 } 3071 3072 fn readOidFromList(list: TempDB.ArrayList(.read_only), index: u64) ![hash.byteLen(repo_opts.hash)]u8 { 3073 const oid_cursor = try list.getCursor(index) orelse return error.CursorNotFound; 3074 var oid: [hash.byteLen(repo_opts.hash)]u8 = undefined; 3075 _ = try oid_cursor.readBytes(&oid); 3076 return oid; 3077 } 3078 }; 3079 } 3080