feat: Allow log handler overriding

cmd/osv-scanner/scan/image/command_test.go

@@ -370,6 +370,7 @@ func TestCommand_OCIImage_JSONFormat(t *testing.T) {
 
 func TestCommand_HtmlFile(t *testing.T) {
 	t.Parallel()
+	testutility.SkipIfNotAcceptanceTesting(t, "Needs container image")
 
 	testDir := testutility.CreateTestDir(t)
 

internal/cmdlogger/handler.go

@@ -8,6 +8,8 @@ import (
 	"strings"
 )
 
+var GlobalHandler slog.Handler
+
 type Handler struct {
 	stdout             io.Writer
 	stderr             io.Writer
@@ -39,15 +41,19 @@ func (c *Handler) writer(level slog.Level) io.Writer {
 	return c.stdout
 }
 
-func (c *Handler) Enabled(_ context.Context, level slog.Level) bool {
+func (c *Handler) Enabled(ctx context.Context, level slog.Level) bool {
 	if level == slog.LevelError {
 		c.hasErrored = true
 	}
 
+	if GlobalHandler != nil {
+		return GlobalHandler.Enabled(ctx, level)
+	}
+
 	return level >= c.Level.Level()
 }
 
-func (c *Handler) Handle(_ context.Context, record slog.Record) error {
+func (c *Handler) Handle(ctx context.Context, record slog.Record) error {
 	if record.Level == slog.LevelError {
 		c.hasErrored = true
 
@@ -56,6 +62,10 @@ func (c *Handler) Handle(_ context.Context, record slog.Record) error {
 		}
 	}
 
+	if GlobalHandler != nil {
+		return GlobalHandler.Handle(ctx, record)
+	}
+
 	_, err := fmt.Fprint(c.writer(record.Level), record.Message+"\n")
 
 	return err
@@ -73,11 +83,17 @@ func (c *Handler) HasErroredBecauseInvalidConfig() bool {
 	return c.hasErroredBecauseInvalidConfig
 }
 
-func (c *Handler) WithAttrs(_ []slog.Attr) slog.Handler {
+func (c *Handler) WithAttrs(a []slog.Attr) slog.Handler {
+	if GlobalHandler != nil {
+		return GlobalHandler.WithAttrs(a)
+	}
 	panic("not supported")
 }
 
-func (c *Handler) WithGroup(_ string) slog.Handler {
+func (c *Handler) WithGroup(g string) slog.Handler {
+	if GlobalHandler != nil {
+		return GlobalHandler.WithGroup(g)
+	}
 	panic("not supported")
 }
 

pkg/osvscanner/osvscanner.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log/slog"
 	"maps"
 	"net/http"
 	"os"
@@ -546,3 +547,8 @@ func overrideGoVersion(scanResults *results.ScanResults) {
 		}
 	}
 }
+
+// SetLogger sets the global slog handler for the cmdlogger.
+func SetLogger(handler slog.Handler) {
+	cmdlogger.GlobalHandler = handler
+}