╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ event.zig ────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭64476c3a..╮ 64476c3a.. see-em: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (533) 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 patch.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
1827 1828 pub fn upsert( 1829 comptime T: type, 1830 comptime DB: type, 1831 comptime hash_kind: hash.HashKind, 1832 map: DB.HashMap(.read_write), 1833 event: T, 1834 ) !void { 1835 switch (@typeInfo(T)) { 1836 .@"struct" => |struct_info| { 1837 inline for (struct_info.fields) |field| { 1838 try upsertField(DB, hash_kind, map, field.name, field.type, @field(event, field.name)); 1839 } 1840 }, 1841 else => @compileError("upsert expects a struct"), 1842 } 1843 } 1844 1845 fn upsertField( 1846 comptime DB: type, 1847 comptime hash_kind: hash.HashKind, 1848 map: DB.HashMap(.read_write), 1849 comptime field_name: []const u8, 1850 comptime Field: type, 1851 value: Field, 1852 ) !void { 1853 const key = hash.hashInt(hash_kind, field_name); 1854 1855 switch (@typeInfo(Field)) { 1856 .pointer => |pointer_info| { 1857 if (pointer_info.size == .slice and pointer_info.child == u8) { 1858 try upsertBytes(DB, hash_kind, map, key, value); 1859 } else { 1860 @compileError("unsupported upsert field type: " ++ @typeName(Field)); 1861 } 1862 }, 1863 .array => |array_info| { 1864 if (array_info.child == u8) { 1865 try upsertBytes(DB, hash_kind, map, key, &value); 1866 } else { 1867 @compileError("unsupported upsert field type: " ++ @typeName(Field)); 1868 } 1869 }, 1870 .int => |int_info| switch (int_info.signedness) { 1871 .unsigned => { 1872 if (try map.getCursor(key)) |value_cursor| { 1873 if (try value_cursor.readUint() == value) { 1874 return; 1875 } 1876 } 1877 1878 try map.put(key, .{ .uint = value }); 1879 }, 1880 .signed => { 1881 if (try map.getCursor(key)) |value_cursor| { 1882 if (try value_cursor.readInt() == value) { 1883 return; 1884 } 1885 } 1886 1887 try map.put(key, .{ .int = value }); 1888 }, 1889 }, 1890 .bool => { 1891 const bytes = if (value) "true" else "false"; 1892 if (try map.getCursor(key)) |value_cursor| { 1893 var buffer: [5]u8 = undefined; 1894 const existing = try value_cursor.readBytesObject(&buffer); 1895 if (existing.format_tag) |format_tag| { 1896 if (std.mem.eql(u8, &format_tag, "bl") and std.mem.eql(u8, existing.value, bytes)) { 1897 return; 1898 } 1899 } 1900 } 1901 1902 try map.put(key, .{ .bytes_object = .{ .value = bytes, .format_tag = "bl".* } }); 1903 }, 1904 .@"enum" => try upsertBytes(DB, hash_kind, map, key, @tagName(value)), 1905 .@"union" => switch (value) { 1906 inline else => |payload, tag| { 1907 if (@TypeOf(payload) == void) { 1908 try upsertBytes(DB, hash_kind, map, key, @tagName(tag)); 1909 } else { 1910 const tag_key = hash.hashInt(hash_kind, @tagName(tag)); 1911 if (try map.getCursor(key)) |cursor| { 1912 switch (cursor.slot().tag) { 1913 .hash_map => { 1914 const variants = try DB.HashMap(.read_only).init(cursor); 1915 if (try variants.getCursor(tag_key) == null) try map.put(key, .{ .slot = null }); 1916 }, 1917 else => try map.put(key, .{ .slot = null }), 1918 } 1919 } 1920 const variants = try DB.HashMap(.read_write).init(try map.putCursor(key)); 1921 if (@typeInfo(@TypeOf(payload)) == .optional) { 1922 // keep the variant even when its payload is null 1923 if (payload == null) return try variants.put(tag_key, .{ .slot = null }); 1924 } 1925 if (try variants.getCursor(tag_key)) |cursor| { 1926 if (cursor.slot().tag == .none) _ = try variants.remove(tag_key); 1927 } 1928 try upsertField(DB, hash_kind, variants, @tagName(tag), @TypeOf(payload), payload); 1929 } 1930 }, 1931 }, 1932 .optional => |optional_info| { 1933 // a missing key is null 1934 if (value) |child| { 1935 try upsertField(DB, hash_kind, map, field_name, optional_info.child, child); 1936 } else { 1937 _ = try map.remove(key); 1938 } 1939 }, 1940 .@"struct" => try upsert( 1941 Field, 1942 DB, 1943 hash_kind, 1944 try DB.HashMap(.read_write).init(try map.putCursor(key)), 1945 value, 1946 ), 1947 else => @compileError("unsupported upsert field type: " ++ @typeName(Field)), 1948 } 1949 } 1950 1951 fn upsertBytes( 1952 comptime DB: type, 1953 comptime hash_kind: hash.HashKind, 1954 map: DB.HashMap(.read_write), 1955 key: hash.HashInt(hash_kind), 1956 value: []const u8, 1957 ) !void { 1958 var existing_cursor_maybe = try map.getCursor(key); 1959 if (existing_cursor_maybe) |*existing_cursor| { 1960 if (try bytesEqual(DB, existing_cursor, value)) { 1961 return; 1962 } 1963 } 1964 1965 try map.put(key, .{ .bytes = value }); 1966 } 1967 1968 fn bytesEqual( 1969 comptime DB: type, 1970 cursor: *DB.Cursor(.read_only), 1971 value: []const u8, 1972 ) !bool { 1973 switch (cursor.slot().tag) { 1974 .bytes, .short_bytes => {}, 1975 else => return false, 1976 } 1977 var read_buffer: [1024]u8 = undefined; 1978 var reader = try cursor.reader(&read_buffer); 1979 if (reader.size != value.len) { 1980 return false; 1981 } 1982 1983 var chunk_buffer: [1024]u8 = undefined; 1984 var offset: usize = 0; 1985 while (offset < value.len) { 1986 const chunk_len = @min(chunk_buffer.len, value.len - offset); 1987 try reader.interface.readSliceAll(chunk_buffer[0..chunk_len]); 1988 if (!std.mem.eql(u8, chunk_buffer[0..chunk_len], value[offset .. offset + chunk_len])) { 1989 return false; 1990 } 1991 offset += chunk_len; 1992 } 1993 1994 return true; 1995 } 1996 1997 // 1998 // CommitIterator 1999 // 2000 // differs from xit's ObjectIterator in a few ways: 2001 // 2002 // 1. iterates parents first, rather than children first 2003 // 2. `next` only returns the object id, not the full Object 2004 // 3. stores its temporary state in a file on disk to avoid OOMs 2005 // 2006 2007 pub fn CommitIterator(comptime repo_kind: rp.RepoKind, comptime repo_opts: rp.RepoOpts(repo_kind)) type { 2008 return struct { 2009 const DB = EventDB(repo_opts.hash); 2010 // a plain file is used for the scratch db because each write outside 2011 // a transaction is synced anyway, so buffering would gain nothing 2012 const TempDB = xit.xitdb.Database(.file, hash.HashInt(repo_opts.hash)); 2013 const db_name = "haxy-repo-events.db"; 2014 2015 repo_dir: std.Io.Dir, 2016 db_file: std.Io.File, 2017 db: *TempDB, 2018 // map of each object id to its children 2019 parent_to_children: TempDB.HashMap(.read_write), 2020 // tracking pending parents is necessary because a child can only 2021 // be returned after all of its unconsumed parents have been returned 2022 child_to_pending_parents: TempDB.HashMap(.read_write), 2023 // queue of object ids that are ready to be returned from `next` 2024 ready_queue: TempDB.ArrayList(.read_write), 2025 ready_queue_index: u64, 2026 // the object id at the tip of this branch 2027 newest_object_id: ?[hash.byteLen(repo_opts.hash)]u8, 2028 // the object id furthest back in the history that hasn't been consumed 2029 oldest_object_id: ?[hash.byteLen(repo_opts.hash)]u8, 2030 2031 pub fn init( 2032 state: rp.Repo(repo_kind, repo_opts).State(.read_only), 2033 io: std.Io, 2034 allocator: std.mem.Allocator, 2035 consumed_object_ids: DB.HashMap(.read_only), 2036 ref: rf.Ref, 2037 ) !CommitIterator(repo_kind, repo_opts) { 2038 const db_file = try state.core.repo_dir.createFile(io, db_name, .{ .truncate = true, .lock = .exclusive, .read = true }); 2039 errdefer { 2040 db_file.close(io); 2041 state.core.repo_dir.deleteFile(io, db_name) catch {}; 2042 } 2043 2044 // cursors point at the db, so it needs a stable address 2045 const db_ptr = try allocator.create(TempDB); 2046 errdefer allocator.destroy(db_ptr); 2047 // the db is scratch state that gets deleted after iteration, so 2048 // there is nothing worth fsyncing 2049 db_ptr.* = try TempDB.init(.{ .io = io, .file = db_file, .fsync = false }); 2050 2051 const map = try TempDB.HashMap(.read_write).init(db_ptr.rootCursor()); 2052 2053 const parent_to_children_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "parent->children")); 2054 const parent_to_children = try TempDB.HashMap(.read_write).init(parent_to_children_cursor); 2055 2056 const child_to_pending_parents_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "child->pending-parents")); 2057 const child_to_pending_parents = try TempDB.HashMap(.read_write).init(child_to_pending_parents_cursor); 2058 2059 const ready_queue_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "ready-queue")); 2060 const ready_queue = try TempDB.ArrayList(.read_write).init(ready_queue_cursor); 2061 2062 var self = CommitIterator(repo_kind, repo_opts){ 2063 .repo_dir = state.core.repo_dir, 2064 .db_file = db_file, 2065 .db = db_ptr, 2066 .parent_to_children = parent_to_children, 2067 .child_to_pending_parents = child_to_pending_parents, 2068 .ready_queue = ready_queue, 2069 .ready_queue_index = 0, 2070 .newest_object_id = null, 2071 .oldest_object_id = null, 2072 }; 2073 errdefer self.deinit(io, allocator); 2074 2075 try self.collect(state, io, allocator, consumed_object_ids, ref); 2076 2077 return self; 2078 } 2079 2080 pub fn deinit(self: *CommitIterator(repo_kind, repo_opts), io: std.Io, allocator: std.mem.Allocator) void { 2081 self.db_file.close(io); 2082 self.repo_dir.deleteFile(io, db_name) catch {}; 2083 allocator.destroy(self.db); 2084 } 2085 2086 pub fn next(self: *CommitIterator(repo_kind, repo_opts)) !?[hash.byteLen(repo_opts.hash)]u8 { 2087 if (self.ready_queue_index >= try self.ready_queue.count()) return null; 2088 2089 const oid = try readOidFromList(self.ready_queue.readOnly(), self.ready_queue_index); 2090 self.ready_queue_index += 1; 2091 2092 try self.enqueueChildren(&oid); 2093 return oid; 2094 } 2095 2096 fn collect( 2097 self: *CommitIterator(repo_kind, repo_opts), 2098 state: rp.Repo(repo_kind, repo_opts).State(.read_only), 2099 io: std.Io, 2100 allocator: std.mem.Allocator, 2101 consumed_object_ids: DB.HashMap(.read_only), 2102 ref: rf.Ref, 2103 ) !void { 2104 const map = try TempDB.HashMap(.read_write).init(self.db.rootCursor()); 2105 2106 const walk_queue_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "walk-queue")); 2107 const walk_queue = try TempDB.ArrayList(.read_write).init(walk_queue_cursor); 2108 var walk_queue_index: u64 = 0; 2109 2110 const seen_object_ids_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "seen-object-ids")); 2111 const seen_object_ids = try TempDB.HashSet(.read_write).init(seen_object_ids_cursor); 2112 2113 const head_oid_hex = (try rf.readRecur(repo_kind, repo_opts, state, io, .{ .ref = ref })) orelse return error.OidNotFound; 2114 var head_oid: [hash.byteLen(repo_opts.hash)]u8 = undefined; 2115 _ = try std.fmt.hexToBytes(&head_oid, &head_oid_hex); 2116 try walk_queue.append(.{ .bytes = &head_oid }); 2117 2118 while (walk_queue_index < try walk_queue.count()) { 2119 const oid = try readOidFromList(walk_queue.readOnly(), walk_queue_index); 2120 const oid_int = hash.bytesToInt(repo_opts.hash, &oid); 2121 2122 walk_queue_index += 1; 2123 2124 // if we've seen this object id, skip it 2125 if (null != try seen_object_ids.getCursor(oid_int)) { 2126 continue; 2127 } 2128 2129 try seen_object_ids.put(oid_int, .{ .bytes = &oid }); 2130 2131 var commit_object = try obj.Object(repo_kind, repo_opts).init(state, io, allocator, &std.fmt.bytesToHex(oid, .lower)); 2132 defer commit_object.deinit(); 2133 2134 // if this object id has already been consumed, skip it 2135 if (null != try consumed_object_ids.getCursor(oid_int)) { 2136 continue; 2137 } 2138 2139 if (self.newest_object_id == null) self.newest_object_id = oid; 2140 self.oldest_object_id = oid; 2141 2142 const parent_oids = commit_object.content.commit.metadata.parent_oids orelse return error.ParentOidsNotFound; 2143 var pending_parent_count: u64 = 0; 2144 for (parent_oids) |*parent_oid| { 2145 var parent_oid_bytes: [hash.byteLen(repo_opts.hash)]u8 = undefined; 2146 _ = try std.fmt.hexToBytes(&parent_oid_bytes, parent_oid); 2147 const parent_oid_int = hash.bytesToInt(repo_opts.hash, &parent_oid_bytes); 2148 2149 // if this object id has already been consumed, skip it 2150 if (null != try consumed_object_ids.getCursor(parent_oid_int)) { 2151 continue; 2152 } 2153 2154 // if this object id hasn't already been seen, add it to the walk queue 2155 if (null == try seen_object_ids.getCursor(parent_oid_int)) { 2156 try walk_queue.append(.{ .bytes = &parent_oid_bytes }); 2157 } 2158 2159 const children_cursor = try self.parent_to_children.putCursor(parent_oid_int); 2160 const children = try TempDB.HashSet(.read_write).init(children_cursor); 2161 try children.put(oid_int, .{ .bytes = &oid }); 2162 pending_parent_count += 1; 2163 } 2164 2165 if (pending_parent_count == 0) { 2166 try self.ready_queue.append(.{ .bytes = &oid }); 2167 } else { 2168 try self.child_to_pending_parents.put(oid_int, .{ .uint = pending_parent_count }); 2169 } 2170 } 2171 } 2172 2173 fn enqueueChildren(self: *CommitIterator(repo_kind, repo_opts), oid: *const [hash.byteLen(repo_opts.hash)]u8) !void { 2174 const oid_int = hash.bytesToInt(repo_opts.hash, oid); 2175 const children_cursor = try self.parent_to_children.getCursor(oid_int) orelse return; 2176 const children = try TempDB.HashSet(.read_only).init(children_cursor); 2177 var children_iter = try children.iterator(); 2178 2179 while (try children_iter.next()) |*child_cursor| { 2180 const kv_pair = try child_cursor.readKeyValuePair(); 2181 const child_oid_int = kv_pair.hash; 2182 const pending_parent_cursor = try self.child_to_pending_parents.getCursor(child_oid_int) orelse return error.CursorNotFound; 2183 const pending_parent_count = try pending_parent_cursor.readUint(); 2184 2185 if (pending_parent_count <= 1) { 2186 _ = try self.child_to_pending_parents.remove(child_oid_int); 2187 const child_oid = hash.intToBytes(hash.HashInt(repo_opts.hash), child_oid_int); 2188 try self.ready_queue.append(.{ .bytes = &child_oid }); 2189 } else { 2190 try self.child_to_pending_parents.put(child_oid_int, .{ .uint = pending_parent_count - 1 }); 2191 } 2192 } 2193 } 2194 2195 fn readOidFromList(list: TempDB.ArrayList(.read_only), index: u64) ![hash.byteLen(repo_opts.hash)]u8 { 2196 const oid_cursor = try list.getCursor(index) orelse return error.CursorNotFound; 2197 var oid: [hash.byteLen(repo_opts.hash)]u8 = undefined; 2198 _ = try oid_cursor.readBytes(&oid); 2199 return oid; 2200 } 2201 }; 2202 } 2203