pkg/sysregistriesv2/system_registries_v2.go
func postProcessRegistries(regs []Registry) ([]Registry, error) {
	var registries []Registry
	regMap := make(map[string][]Registry)

	for _, reg := range regs {
		var err error

		// make sure Location and Prefix are valid
		reg.Location, err = parseLocation(reg.Location)
		if err != nil {
			return nil, err
		}

		if reg.Prefix == "" {
			reg.Prefix = reg.Location
		} else {
			reg.Prefix, err = parseLocation(reg.Prefix)
			if err != nil {
				return nil, err
			}
		}

		// make sure mirrors are valid
		for _, mir := range reg.Mirrors {
			mir.Location, err = parseLocation(mir.Location)
			if err != nil {
				return nil, err
			}
		}
		registries = append(registries, reg)
		regMap[reg.Location] = append(regMap[reg.Location], reg)
	}

	// Given a registry can be mentioned multiple times (e.g., to have
	// multiple prefixes backed by different mirrors), we need to make sure
	// there are no conflicts among them.
	//
	// Note: we need to iterate over the registries array to ensure a
	// deterministic behavior which is not guaranteed by maps.
	for _, reg := range registries {
		others, _ := regMap[reg.Location]
		for _, other := range others {
			if reg.Insecure != other.Insecure {
				msg := fmt.Sprintf("registry '%s' is defined multiple times with conflicting 'insecure' setting", reg.Location)

				return nil, &InvalidRegistries{s: msg}
			}
			if reg.Blocked != other.Blocked {
				msg := fmt.Sprintf("registry '%s' is defined multiple times with conflicting 'blocked' setting", reg.Location)
				return nil, &InvalidRegistries{s: msg}
			}
		}
	}

	return registries, nil
}
func postProcessRegistries(regs []Registry) ([]Registry, error) {
	var registries []Registry
	regMap := make(map[string][]Registry)

	for _, reg := range regs {
		var err error

		// make sure Location and Prefix are valid
		reg.Location, err = parseLocation(reg.Location)
		if err != nil {
			return nil, err
		}

		if reg.Prefix == "" {
			reg.Prefix = reg.Location
		} else {
			reg.Prefix, err = parseLocation(reg.Prefix)
			if err != nil {
				return nil, err
			}
		}

		// make sure mirrors are valid
		for _, mir := range reg.Mirrors {
			mir.Location, err = parseLocation(mir.Location)
			if err != nil {
				return nil, err
			}
		}
		registries = append(registries, reg)
		regMap[reg.Location] = append(regMap[reg.Location], reg)
	}

	// Given a registry can be mentioned multiple times (e.g., to have
	// multiple prefixes backed by different mirrors), we need to make sure
	// there are no conflicts among them.
	//
	// Note: we need to iterate over the registries array to ensure a
	// deterministic behavior which is not guaranteed by maps.
	for _, reg := range registries {
		others, _ := regMap[reg.Location]
		for _, other := range others {
			if reg.Insecure != other.Insecure {
				msg := fmt.Sprintf("registry '%s' is defined multiple times with conflicting 'insecure' setting", reg.Location)

				return nil, &InvalidRegistries{s: msg}
			}
			if reg.Blocked != other.Blocked {
				msg := fmt.Sprintf("registry '%s' is defined multiple times with conflicting 'blocked' setting", reg.Location)
				return nil, &InvalidRegistries{s: msg}
			}
		}
	}

	return registries, nil
}
// postProcessRegistries checks the consistency of all registries (e.g., set
// the Prefix to Location if not set) and applies conflict checks.  It returns an
// array of cleaned registries and error in case of conflicts.