Adding a license confidence override threshold

backend/internal/license/license_detector.go

@@ -119,6 +119,16 @@ func WithConfidenceThreshold(threshold float32) Opt {
 	}
 }
 
+func WithConfidenceOverrideThreshold(threshold float32) Opt {
+	return func(config *Config) error {
+		if threshold < 0 || threshold > 1 {
+			return fmt.Errorf("invalid threshold: %f", threshold)
+		}
+		config.ConfidenceOverrideThreshold = threshold
+		return nil
+	}
+}
+
 func WithCompatibleLicenses(licenses ...string) Opt {
 	return func(config *Config) error {
 		config.CompatibleLicenses = append(config.CompatibleLicenses, licenses...)
@@ -129,19 +139,28 @@ func WithCompatibleLicenses(licenses ...string) Opt {
 type Config struct {
 	CompatibleLicenses  []string
 	ConfidenceThreshold float32
+	// ConfidenceOverrideThreshold is the limit at which a detected license overrides all other detected licenses.
+	// Defaults to 98%.
+	ConfidenceOverrideThreshold float32
 }
 
 func (c *Config) ApplyDefaults() error {
 	if c.ConfidenceThreshold == 0.0 {
 		c.ConfidenceThreshold = 0.9
 	}
+	if c.ConfidenceOverrideThreshold == 0 {
+		c.ConfidenceOverrideThreshold = 0.98
+	}
 	return nil
 }
 
 func (c *Config) Validate() error {
 	if len(c.CompatibleLicenses) == 0 {
 		return fmt.Errorf("no licenses configured")
 	}
+	if c.ConfidenceOverrideThreshold < c.ConfidenceThreshold {
+		return fmt.Errorf("the confidence override threshold (%f) is lower than the confidence threshold (%f)", c.ConfidenceOverrideThreshold, c.ConfidenceThreshold)
+	}
 	return nil
 }
 
@@ -230,6 +249,11 @@ func (d detector) Detect(_ context.Context, repository fs.ReadDirFS, detectOptio
 			if err := detectCfg.LinkFetcher(&l); err != nil {
 				return nil, err
 			}
+			if match.Confidence >= d.config.ConfidenceOverrideThreshold {
+				return []License{
+					l,
+				}, nil
+			}
 			result = append(result, l)
 		}
 	}