c4ebd80669
Implements conf.Load to populate tagged structs from a chain of Sources (env, .env, YAML/JSON/TOML, custom). Supports default values, slice separators, nested structs, pointer fields, and a Validator hook. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
package conf_test
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import (
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"fmt"
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"strings"
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"time"
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"git.juancwu.dev/juancwu/conf"
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"git.juancwu.dev/juancwu/errx"
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)
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type Config struct {
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BindAddr string `env:"BIND_ADDR" default:":8080"`
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DatabaseURL string `env:"DATABASE_URL"`
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SessionCookieSecure bool `env:"SESSION_COOKIE_SECURE" default:"true"`
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SessionIdleTTL time.Duration `env:"SESSION_IDLE_TTL" default:"24h"`
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JWTSecret []byte `env:"JWT_SECRET"`
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WorkerConcurrency int `env:"WORKER_CONCURRENCY" default:"4"`
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}
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func (c *Config) Validate() error {
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const op = "config.Validate"
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if strings.TrimSpace(c.DatabaseURL) == "" {
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return errx.New(op, "DATABASE_URL is required")
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}
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if len(c.JWTSecret) == 0 {
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return errx.New(op, "JWT_SECRET is required")
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}
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return nil
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}
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func ExampleLoad() {
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src := conf.MapSource(map[string]string{
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"DATABASE_URL": "postgres://localhost/x",
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"JWT_SECRET": "shh",
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})
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var cfg Config
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if err := conf.Load(&cfg, src); err != nil {
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fmt.Println("err:", err)
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return
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}
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fmt.Printf("bind=%s workers=%d idle=%s secure=%v",
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cfg.BindAddr, cfg.WorkerConcurrency, cfg.SessionIdleTTL, cfg.SessionCookieSecure)
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// Output: bind=:8080 workers=4 idle=24h0m0s secure=true
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}
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