Rene Nochebuena
38a415c2ab
Introduces `code.nochebuena.dev/einherjar/core` — the foundational implementation module of the Einherjar framework. Provides four sub-packages that together cover every service's baseline needs: lifecycle management, structured logging, typed errors, and struct validation. - launcher: Launcher interface — three-phase managed lifecycle (OnInit → BeforeStart hooks → OnStart → OS signal wait → OnStop in reverse). Accepts lifecycle.Component and logging.Logger from contracts. Prints an ASCII art banner at startup (EINHERJAR_BANNER=off to suppress). Banner includes core version via runtime/debug.ReadBuildInfo() and a loaded-module list for every registered component that implements observability.Identifiable. Config struct with EINHERJAR_COMPONENT_STOP_TIMEOUT env tag (caarlos0/env syntax, default 15s). - logz: Logger implementation backed by log/slog. Returns contracts/logging.Logger. Detects errs.CodedError and errs.ContextualError (from contracts/errs) to enrich log records automatically — replaces the private duck-typed bridge from micro-lib. Context helpers: WithRequestID, WithField, WithFields, GetRequestID. Config struct with EINHERJAR_LOG_LEVEL (default INFO) and EINHERJAR_LOG_JSON (default false) env tags (caarlos0/env syntax); programmatic-only fields StaticArgs and Writer carry no tags. - xerrors: Typed error codes with context enrichment. Complete gRPC canonical set (16 codes) plus HTTP 410 ErrGone. Adds ErrOutOfRange, ErrAborted, ErrDataLoss over micro-lib. One convenience constructor per code. *Err declares compile-time satisfaction of errs.CodedError and errs.ContextualError. - valid: Struct validation wrapping go-playground/validator/v10. Validator interface + MessageProvider interface with full built-in tag coverage (~150 tags) in both DefaultMessages (English) and SpanishMessages (Spanish). Backend fully hidden; returns *xerrors.Err with ErrInvalidInput or ErrInternal. FieldLevel interface abstracts the backend's field-level access for custom validators. WithCustomValidator registers custom validation tags at construction time; OverrideProvider chains a tag→handler map with a fallback MessageProvider for custom tag messages without re-implementing built-ins. Compliance test enforces CT-6 (at most one exported TypeSpec per file via AST) and verifies behavioural correctness of all four sub-packages, including custom validator registration and OverrideProvider composition. Compile-time var _ assertions prove interface satisfaction. docs: ADR-001 (core module composition), ADR-002 (logz contracts/errs adoption), ADR-003 (Config naming convention and caarlos0/env tag standard)
52 lines
2.1 KiB
Go
52 lines
2.1 KiB
Go
package launcher
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import (
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"fmt"
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"os"
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"runtime/debug"
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"strings"
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"code.nochebuena.dev/einherjar/contracts/observability"
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)
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func printBanner(identifiables []observability.Identifiable) {
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v := strings.ToLower(os.Getenv("EINHERJAR_BANNER"))
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if v == "off" || v == "false" {
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return
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}
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fmt.Fprintf(os.Stdout, bannerText, coreVersion())
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for _, id := range identifiables {
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path := strings.TrimPrefix(id.ModulePath(), "code.nochebuena.dev/")
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fmt.Fprintf(os.Stdout, " · %-25s %s\n", path, id.ModuleVersion())
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}
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if len(identifiables) > 0 {
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fmt.Fprintln(os.Stdout)
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}
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}
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func coreVersion() string {
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const path = "code.nochebuena.dev/einherjar/core"
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if info, ok := debug.ReadBuildInfo(); ok {
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for _, dep := range info.Deps {
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if dep.Path == path {
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return dep.Version
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}
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}
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if info.Main.Path == path {
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return info.Main.Version
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}
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}
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return "(devel)"
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}
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const bannerText = `
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███████╗██╗███╗ ██╗██╗ ██╗███████╗██████╗ ██╗ █████╗ ██████╗
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██╔════╝██║████╗ ██║██║ ██║██╔════╝██╔══██╗ ██║██╔══██╗██╔══██╗
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█████╗ ██║██╔██╗ ██║███████║█████╗ ██████╔╝ ██║███████║██████╔╝
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██╔══╝ ██║██║╚██╗██║██╔══██║██╔══╝ ██╔══██╗██ ██║██╔══██║██╔══██╗
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███████╗██║██║ ╚████║██║ ██║███████╗██║ ██║╚█████╔╝██║ ██║██║ ██║
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╚══════╝╚═╝╚═╝ ╚═══╝╚═╝ ╚═╝╚══════╝╚═╝ ╚═╝ ╚════╝ ╚═╝ ╚═╝╚═╝ ╚═╝
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code.nochebuena.dev/einherjar · Chosen warriors. Not for themselves. · %s
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`
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