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feat(db-sqlite): initial implementation — database/sql SQLite with lifecycle and UnitOfWork (v1.0.0) Introduces code.nochebuena.dev/einherjar/db-sqlite — the SQLite database starter for the Einherjar framework. Absorbs the sqlite package from micro-lib using the pure-Go modernc.org/sqlite driver (no CGO, cross-compilation compatible). Interfaces (CT-6: one TypeSpec per file): - Executor — ExecContext, QueryContext, QueryRowContext (database/sql types) - Tx — Executor + Commit(), Rollback() — no ctx; honest database/sql contract - Provider — GetExecutor, Begin, Ping, HandleError - Component — lifecycle.Component + observability.Checkable + Provider - UnitOfWork — Do(ctx, fn) Implementation: - New(logger, cfg) Component — pool not created until OnInit - OnInit: sql.Open with DSN (Path + Pragmas); sets MaxOpenConns, MaxIdleConns - OnStart: Ping with 5s timeout; logs "sqlite: connected" - OnStop: db.Close(); logs "sqlite: closing pool" - GetExecutor: returns active Tx from context (ctxTxKey) or *sql.DB; explicit nil return when db uninitialized to avoid typed-nil interface pitfall - Begin: wraps db.BeginTx; wrapped in xerrors on error - HealthCheck: delegates to Ping; Priority LevelDegraded (file DB; absence is non-fatal on a server restart — file always present if configured) - NewUnitOfWork(logger, provider) UnitOfWork — acquires writeMu before Begin to prevent SQLITE_BUSY under concurrent goroutines (SQLite single-writer model) - writeMu: extracted from *sqliteImpl via type assertion in NewUnitOfWork; gracefully skipped when provider is a mock (nil mu) - HandleError: sql.ErrNoRows→ErrNotFound, unique/pk constraint→ErrAlreadyExists, foreign key→ErrInvalidInput, all others→ErrInternal Config (EINHERJAR_SQLITE_* env vars): Path(required), MaxOpenConns(1), MaxIdleConns(1), Pragmas(?_journal=WAL&_timeout=5000&_fk=true) - Component interface embeds observability.Identifiable; identifiable.go implements ModulePath and ModuleVersion via runtime/debug.ReadBuildInfo() — prints in launcher banner
2026-05-29 15:56:45 +00:00
module code.nochebuena.dev/einherjar/db-sqlite
go 1.26
require (
code.nochebuena.dev/einherjar/contracts v1.0.0
code.nochebuena.dev/einherjar/core v1.0.0
modernc.org/sqlite v1.37.1
)
require (
github.com/dustin/go-humanize v1.0.1 // indirect
github.com/google/uuid v1.6.0 // indirect
github.com/mattn/go-isatty v0.0.20 // indirect
github.com/ncruces/go-strftime v0.1.9 // indirect
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0 // indirect
golang.org/x/sys v0.39.0 // indirect
modernc.org/libc v1.65.7 // indirect
modernc.org/mathutil v1.7.1 // indirect
modernc.org/memory v1.11.0 // indirect
)