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Monorepo for Tangled
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Go
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import ( "context" "database/sql" "log/slog" "slices" "strings"
_ "github.com/mattn/go-sqlite3" "tangled.org/core/log" "tangled.org/core/orm")
type DB struct { *sql.DB}
type DBTX interface { QueryRow(query string, args ...any) *sql.Row Exec(query string, args ...any) (sql.Result, error)}
func Make(ctx context.Context, dbPath string) (*DB, error) { // https://github.com/mattn/go-sqlite3#connection-string opts := []string{ "_foreign_keys=1", "_journal_mode=WAL", "_synchronous=NORMAL", "_auto_vacuum=incremental", "_busy_timeout=5000", }
logger := log.FromContext(ctx) logger = log.SubLogger(logger, "db")
db, err := sql.Open("sqlite3", dbPath+"?"+strings.Join(opts, "&")) if err != nil { return nil, err }
conn, err := db.Conn(ctx) if err != nil { return nil, err } defer conn.Close()
_, err = conn.ExecContext(ctx, ` create table if not exists _jetstream ( id integer primary key autoincrement, last_time_us integer not null );
create table if not exists known_dids ( did text primary key );
create table if not exists repos ( id integer primary key autoincrement, knot text not null, owner text not null, rkey text not null, repo_did text, created_at text, addedAt text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
unique(owner, rkey) );
create table if not exists repo_collaborators ( id integer primary key autoincrement, owner_did text not null, rkey text not null, subject text not null, repo_did text not null, addedAt text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
unique(owner_did, rkey) );
create table if not exists spindle_members ( -- identifiers for the record id integer primary key autoincrement, did text not null, rkey text not null,
-- data instance text not null, subject text not null, created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
-- constraints unique (did, rkey) );
-- status event for a single workflow create table if not exists events ( rkey text not null, nsid text not null, event text not null, -- json created integer not null -- unix nanos );
create table if not exists nixos_toplevel_cache ( config_key text primary key, toplevel text not null, updated_at text not null );
create table if not exists migrations ( id integer primary key autoincrement, name text unique ); `) if err != nil { return nil, err }
if err := runMigrations(ctx, conn, logger); err != nil { return nil, err }
return &DB{db}, nil}
func runMigrations(_ context.Context, conn *sql.Conn, logger *slog.Logger) error { if err := orm.RunMigration(conn, logger, "repos-to-repo-did", func(tx *sql.Tx) error { var hasName int if err := tx.QueryRow( `select count(*) from pragma_table_info('repos') where name = 'name'`, ).Scan(&hasName); err != nil { return err }
if hasName > 0 { var totalRows, copiedRows int if err := tx.QueryRow(`select count(*) from repos`).Scan(&totalRows); err != nil { return err } if err := tx.QueryRow(`select count(*) from repos where coalesce(name, '') <> ''`).Scan(&copiedRows); err != nil { return err } if dropped := totalRows - copiedRows; dropped > 0 { logger.Warn("dropping repo rows with empty name during migration", "dropped", dropped, "kept", copiedRows) }
if _, err := tx.Exec(` create table if not exists repos_new ( id integer primary key autoincrement, knot text not null, owner text not null, rkey text not null, repo_did text, created_at text, addedAt text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
unique(owner, rkey) );
insert into repos_new (id, knot, owner, rkey, addedAt) select id, knot, owner, name, addedAt from repos where coalesce(name, '') <> '';
drop table repos; alter table repos_new rename to repos; `); err != nil { return err } }
_, err := tx.Exec(` create index if not exists idx_repos_repo_did on repos(repo_did); create index if not exists idx_repos_owner_repo_did on repos(owner, repo_did); create index if not exists idx_repo_collaborators_repo_did on repo_collaborators(repo_did); `) return err }); err != nil { return err }
return orm.RunMigration(conn, logger, "spindle-members-unique-on-rkey", func(tx *sql.Tx) error { hasTarget, err := hasUniqueIndex(tx, "spindle_members", []string{"did", "rkey"}) if err != nil { return err } if hasTarget { return nil }
var totalRows, distinctRows int if err := tx.QueryRow(`select count(*) from spindle_members`).Scan(&totalRows); err != nil { return err } if err := tx.QueryRow(`select count(*) from (select 1 from spindle_members group by did, rkey)`).Scan(&distinctRows); err != nil { return err } if dropped := totalRows - distinctRows; dropped > 0 { logger.Warn("dropping duplicate (did, rkey) rows during spindle_members rebuild", "dropped", dropped, "kept", distinctRows) }
_, err = tx.Exec(` create table spindle_members_new ( id integer primary key autoincrement, did text not null, rkey text not null, instance text not null, subject text not null, created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')), unique (did, rkey) );
insert into spindle_members_new (id, did, rkey, instance, subject, created) select id, did, rkey, instance, subject, created from spindle_members sm where id = ( select max(id) from spindle_members where did = sm.did and rkey = sm.rkey );
drop table spindle_members; alter table spindle_members_new rename to spindle_members; `) return err })}
func hasUniqueIndex(tx *sql.Tx, table string, cols []string) (bool, error) { rows, err := tx.Query( `select name from pragma_index_list(?) where "unique" = 1`, table, ) if err != nil { return false, err } defer rows.Close()
var indexNames []string for rows.Next() { var name string if err := rows.Scan(&name); err != nil { return false, err } indexNames = append(indexNames, name) } if err := rows.Err(); err != nil { return false, err }
wantSorted := slices.Clone(cols) slices.Sort(wantSorted)
for _, name := range indexNames { colRows, err := tx.Query( `select name from pragma_index_info(?) order by seqno`, name, ) if err != nil { return false, err } var got []string for colRows.Next() { var c string if err := colRows.Scan(&c); err != nil { colRows.Close() return false, err } got = append(got, c) } colRows.Close() slices.Sort(got) if slices.Equal(got, wantSorted) { return true, nil } } return false, nil}
func (d *DB) SaveLastTimeUs(lastTimeUs int64) error { _, err := d.Exec(` insert into _jetstream (id, last_time_us) values (1, ?) on conflict(id) do update set last_time_us = excluded.last_time_us `, lastTimeUs) return err}
func (d *DB) GetLastTimeUs() (int64, error) { var lastTimeUs int64 row := d.QueryRow(`select last_time_us from _jetstream where id = 1;`) err := row.Scan(&lastTimeUs) return lastTimeUs, err}