HAXY

▄▄▄▄▀▄ ▄▀▀▀▀▀▀▀▀ ▄▄▄▄ ▀▀▀▀▀▄▀▀▀▀▄ ▄▀▀▀▀▀▄ ▀▀▀▀▀▄▄▄▀▀▀ ▄▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▄▀▀▀ ▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▄▀▄▄ ▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▄▀▀ ▀▀▀▀▀▀ ▀▀▀▀▀▀▄▀▀▀▀▀▀▀▀▄ ▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀▄ ▀▀▀ ▀▀▀▀▀▄▀▀▀▀▀▀▀▀▀▀▀▀▄ ▀▀▀ ▄▀▀▀▀▄▀▀▀▀▀▀▀▀▀▄▄▀▀▀ ▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▄▄▄▄▀ ▀▀ ▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀▄▀▀▀▀ ▀ ▀▀▀▀▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▄▀▀▀▄ ▄▀▀▀▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀ ▀▀▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀ ▀▀▀▀▀▀▀▄▀▀▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀▀▀▀▄ ▀▀▀▀▀▀▀▀▄▀▀▀▀▀▀▀▀▀▀▄▀▄▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀▀▀▄▀▄▄▀▀▄▀▀ ▀▀▀▀▀▀▄▄▀▀▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀ ▀▀▀▀▀▀▀▀▄▀▀▀▀▀▀▀▄▄▄▀▀▀▀▄▀▀▀▄▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▄▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▄ ▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀ ▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▄▄▀▀ ▀▀▀▄▀ ▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀ ▀ ▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀▀▀▀▀▀ ▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀▀▀ ▀ ▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▄▀ ▀▄ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▄▄▄▀▀▀▀▀▀▀▀▀▀▀▀ ▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀

╭ Repo.zig ─────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯

╭────╮ ╭ clone ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╮ │http│ ssh │ │ ╰────╯ ╰ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╯

.. Comment.zig Issue.zig ╭─────────────────────────────────╮ │Repo.zig │ ╰─────────────────────────────────╯ User.zig

1 const std = @import("std"); 2 const evt = @import("../event.zig"); 3 const xit = @import("xit"); 4 const hash = xit.hash; 5 6 user_id: []const u8, 7 name: []const u8, 8 description: []const u8, 9 10 // what the db stores: the event's data plus the commit-derived fields 11 pub const Record = struct { 12 event: Self, 13 deleted: bool = false, 14 created_ts: u64 = 0, // the commit timestamp of the event that first created this repo 15 16 // a repo's key in the name index. it's unique per owner, so the read side 17 // resolves the url's username to its user id first. 18 pub fn indexKey(self: Record, allocator: std.mem.Allocator) ![]const u8 { 19 return std.fmt.allocPrint(allocator, "{s}/{s}", .{ self.event.user_id, self.event.name }); 20 } 21 }; 22 23 const Self = @This(); 24 25 pub const name_max_len = 32; 26 27 // the moment keys `evt.merge` reads and writes for this kind 28 pub const merge_policy: evt.MergePolicy = .target_wins; 29 pub const record_map_key = "event-id->repo"; 30 pub const id_set_key = "repo-id-set"; 31 pub const name_index_key = "name->repo-id"; 32 33 pub fn validateName(name: []const u8) !void { 34 if (name.len == 0) return error.NameEmpty; 35 if (name.len > name_max_len) return error.NameTooLong; 36 if (std.mem.eql(u8, name, ".") or std.mem.eql(u8, name, "..")) return error.InvalidName; 37 38 for (name) |c| { 39 if (!std.ascii.isAlphanumeric(c) and c != '-' and c != '_' and c != '.') 40 return error.InvalidName; 41 } 42 } 43 44 pub fn consume( 45 comptime DB: type, 46 comptime hash_kind: hash.HashKind, 47 haxy_moment: DB.HashMap(.read_write), 48 event_id: *const [evt.event_id_size]u8, 49 record_maybe: ?Record, 50 arena: *std.heap.ArenaAllocator, 51 _: ?[]const u8, 52 ) !void { 53 const repo_key = hash.hashInt(hash_kind, event_id); 54 55 const event_id_to_repo_cursor = try haxy_moment.putCursor(hash.hashInt(hash_kind, "event-id->repo")); 56 const event_id_to_repo = try DB.HashMap(.read_write).init(event_id_to_repo_cursor); 57 58 const name_to_repo_id_cursor = try haxy_moment.putCursor(hash.hashInt(hash_kind, "name->repo-id")); 59 const name_to_repo_id = try DB.HashMap(.read_write).init(name_to_repo_id_cursor); 60 61 var existing_record_maybe: ?Record = null; 62 const existing_cursor_maybe = try event_id_to_repo.getCursor(repo_key); 63 if (existing_cursor_maybe) |existing_cursor| { 64 const existing_repo = try DB.HashMap(.read_only).init(existing_cursor); 65 existing_record_maybe = try evt.read(Record, DB, hash_kind, arena, existing_repo); 66 } 67 68 var record_to_write = if (record_maybe) |record| 69 record 70 else blk: { 71 var record = existing_record_maybe orelse return error.EventNotFound; 72 record.deleted = true; 73 break :blk record; 74 }; 75 76 if (!record_to_write.deleted) try validateName(record_to_write.event.name); 77 78 const user_id_to_repo_id_set_cursor = try haxy_moment.putCursor(hash.hashInt(hash_kind, "user-id->repo-id-set")); 79 const user_id_to_repo_id_set = try DB.HashMap(.read_write).init(user_id_to_repo_id_set_cursor); 80 81 if (existing_record_maybe) |existing_record| { 82 // updates preserve the original creation timestamp 83 record_to_write.created_ts = existing_record.created_ts; 84 const order_key = evt.orderKeyDesc(existing_record.created_ts, event_id); 85 86 // drop the old active indexes; active values are re-added below 87 if (!existing_record.deleted) { 88 const existing_path = try existing_record.indexKey(arena.allocator()); 89 _ = try name_to_repo_id.remove(hash.hashInt(hash_kind, existing_path)); 90 91 const old_user_repos_cursor = try user_id_to_repo_id_set.putCursor(hash.hashInt(hash_kind, existing_record.event.user_id)); 92 const old_user_repos = try DB.SortedSet(.read_write).init(old_user_repos_cursor); 93 _ = try old_user_repos.remove(&order_key); 94 } 95 } 96 97 const repo_cursor = try event_id_to_repo.putCursor(repo_key); 98 const repo = try DB.HashMap(.read_write).init(repo_cursor); 99 try evt.upsert(Record, DB, hash_kind, repo, record_to_write); 100 101 const order_key = evt.orderKeyDesc(record_to_write.created_ts, event_id); 102 103 // the id set retains tombstones so merges can carry deletions 104 if (existing_cursor_maybe == null) { 105 const repo_id_set_cursor = try haxy_moment.putCursor(hash.hashInt(hash_kind, id_set_key)); 106 const repo_id_set = try DB.SortedSet(.read_write).init(repo_id_set_cursor); 107 try repo_id_set.put(&order_key); 108 } 109 110 if (!record_to_write.deleted) { 111 const repo_path = try record_to_write.indexKey(arena.allocator()); 112 try name_to_repo_id.put(hash.hashInt(hash_kind, repo_path), .{ .bytes = event_id }); 113 114 // each user's repos are ordered by creation time, newest first 115 const user_repos_cursor = try user_id_to_repo_id_set.putCursor(hash.hashInt(hash_kind, record_to_write.event.user_id)); 116 const user_repos = try DB.SortedSet(.read_write).init(user_repos_cursor); 117 try user_repos.put(&order_key); 118 } 119 } 120 121 // a repo plus its event id (the id is the on-disk repo directory name, so the 122 // caller can locate the working repo under <server>/repos/<hex event id>). 123 pub const RepoWithId = struct { 124 repo: Record, 125 event_id: [evt.event_id_size]u8, 126 }; 127 128 // read a repo by its owner's name and repo name. the owner name is resolved to 129 // a user id via name->user-id (the repo index is keyed by "user-id/repo-name"), 130 // matching the /repo/username/reponame url. 131 pub fn readByOwnerAndName( 132 comptime DB: type, 133 comptime hash_kind: hash.HashKind, 134 haxy_moment: DB.HashMap(.read_only), 135 arena: *std.heap.ArenaAllocator, 136 owner_name: []const u8, 137 repo_name: []const u8, 138 ) !?RepoWithId { 139 // owner name -> user id 140 const name_to_user_id_cursor = try haxy_moment.getCursor(hash.hashInt(hash_kind, "name->user-id")) orelse return null; 141 const name_to_user_id = try DB.HashMap(.read_only).init(name_to_user_id_cursor); 142 const user_id_cursor = try name_to_user_id.getCursor(hash.hashInt(hash_kind, owner_name)) orelse return null; 143 var user_id: [evt.event_id_size]u8 = undefined; 144 _ = try user_id_cursor.readBytes(&user_id); 145 146 // "user-id/repo-name" -> repo event id 147 const repo_path = try (Record{ .event = .{ .user_id = user_id[0..], .name = repo_name, .description = "" } }).indexKey(arena.allocator()); 148 const name_to_repo_id_cursor = try haxy_moment.getCursor(hash.hashInt(hash_kind, "name->repo-id")) orelse return null; 149 const name_to_repo_id = try DB.HashMap(.read_only).init(name_to_repo_id_cursor); 150 const repo_id_cursor = try name_to_repo_id.getCursor(hash.hashInt(hash_kind, repo_path)) orelse return null; 151 var repo_id: [evt.event_id_size]u8 = undefined; 152 _ = try repo_id_cursor.readBytes(&repo_id); 153 154 const event_id_to_repo_cursor = try haxy_moment.getCursor(hash.hashInt(hash_kind, "event-id->repo")) orelse return null; 155 const event_id_to_repo = try DB.HashMap(.read_only).init(event_id_to_repo_cursor); 156 const repo_cursor = try event_id_to_repo.getCursor(hash.hashInt(hash_kind, &repo_id)) orelse return null; 157 const repo_map = try DB.HashMap(.read_only).init(repo_cursor); 158 return .{ .repo = try evt.read(Record, DB, hash_kind, arena, repo_map), .event_id = repo_id }; 159 } 160