zones: introduce WithLogger() scan option

Signed-off-by: Alejandro Mery <amery@jpi.io>

cmd/jpictl/config.go

@@ -17,5 +17,6 @@ var cfg = &Config{
 func (cfg *Config) LoadZones(resolve bool) (*zones.Zones, error) {
 	return zones.New(cfg.Base, cfg.Domain,
 		zones.ResolvePublicAddresses(resolve),
+		zones.WithLogger(log),
 	)
 }

cmd/jpictl/log.go

@@ -7,6 +7,7 @@ import (
 	"darvaza.org/slog"
 )
 
+// TODO: make log level configurable via flags
 var (
 	log = zerolog.New(nil, slog.Debug)
 )

go.mod

@@ -8,6 +8,7 @@ require (
 	darvaza.org/resolver v0.5.4
 	darvaza.org/sidecar v0.0.2
 	darvaza.org/slog v0.5.3
+	darvaza.org/slog/handlers/discard v0.4.5
 	github.com/burntSushi/toml v0.3.1
 	github.com/gofrs/uuid/v5 v5.0.0
 	github.com/hack-pad/hackpadfs v0.2.1

go.sum

@@ -10,6 +10,8 @@ darvaza.org/sidecar v0.0.2 h1:4H8FUxc43kkLjxdShN1CoxLTcoHQsZjDVwm7kt6eIK0=
 darvaza.org/sidecar v0.0.2/go.mod h1:yFC3Qt3j+uS7n9CMpLxwrA68z+FNJhENoenBc9zBJJo=
 darvaza.org/slog v0.5.3 h1:sQzmZXgqRh9oFMKBwEYrEpucLvKJVZxaxa2bHIA6GJ0=
 darvaza.org/slog v0.5.3/go.mod h1:59d+yi+C7gn4pDDuwbbOKawERpdXthFFk1Yc+Sv6XB0=
+darvaza.org/slog/handlers/discard v0.4.5 h1:RRykOItNolHyiUav57lG/GFBL33rcljoa0nWTpY+T0g=
+darvaza.org/slog/handlers/discard v0.4.5/go.mod h1:HYHfISQjMqcPbPoPZ92ib/u7s9JcXvF6OaygpPFwdF8=
 darvaza.org/slog/handlers/filter v0.4.5 h1:CX1bMzldd67e3y3s3Sh4jK8Lyo0WMvTGBB2lD315jhc=
 darvaza.org/slog/handlers/filter v0.4.5/go.mod h1:OuH9rHYg9CIErTJCZliMnFexBfP/HJ9PZ1V1VwSCZ1g=
 darvaza.org/slog/handlers/zerolog v0.4.5 h1:W4cgGORx4wImr+RL96CWSQGTdkZzKX6YHXPSYJvdoB4=

pkg/zones/options.go

@@ -5,10 +5,12 @@ import (
 	"path/filepath"
 
 	"darvaza.org/resolver"
+	"darvaza.org/slog"
+	"darvaza.org/slog/handlers/discard"
 	"github.com/hack-pad/hackpadfs/os"
 )
 
-// A ScanOption preconfigures the Zones before scanning
+// A ScanOption pre-configures the Zones before scanning
 type ScanOption func(*Zones, *ScanOptions) error
 
 // ScanOptions contains flags used by the initial scan
@@ -17,6 +19,10 @@ type ScanOptions struct {
 	// pre-populate Machine.PublicAddresses during the
 	// initial scan
 	DontResolvePublicAddresses bool
+
+	// Logger specifies the logger to be used. otherwise
+	// the scanner will be mute
+	slog.Logger
 }
 
 // ResolvePublicAddresses instructs the scanner to use
@@ -55,6 +61,18 @@ func WithResolver(h resolver.Resolver) ScanOption {
 	}
 }
 
+// WithLogger specifies what to use for logging
+func WithLogger(log slog.Logger) ScanOption {
+	return func(m *Zones, opt *ScanOptions) error {
+		if log == nil {
+			log = discard.New()
+		}
+
+		opt.Logger = log
+		return nil
+	}
+}
+
 func (m *Zones) setDefaults(opt *ScanOptions) error {
 	if m.resolver == nil {
 		h := resolver.NewCloudflareLookuper()
@@ -64,6 +82,12 @@ func (m *Zones) setDefaults(opt *ScanOptions) error {
 		}
 	}
 
+	if opt.Logger == nil {
+		if err := WithLogger(nil)(m, opt); err != nil {
+			return err
+		}
+	}
+
 	return nil
 }