package osbuild1
import (
"encoding/json"
"fmt"
)
// A Stage transforms a filesystem tree.
type Stage struct {
// Well-known name in reverse domain-name notation, uniquely identifying
// the stage type.
Name string `json:"name"`
// Stage-type specific options fully determining the operations of the
// stage.
Options StageOptions `json:"options"`
}
// StageOptions specify the operations of a given stage-type.
type StageOptions interface {
isStageOptions()
}
type rawStage struct {
Name string `json:"name"`
Options json.RawMessage `json:"options"`
}
// UnmarshalJSON unmarshals JSON into a Stage object. Each type of stage has
// a custom unmarshaller for its options, selected based on the stage name.
func (stage *Stage) UnmarshalJSON(data []byte) error {
var rawStage rawStage
err := json.Unmarshal(data, &rawStage)
if err != nil {
return err
}
var options StageOptions
switch rawStage.Name {
case "org.osbuild.fix-bls":
// TODO: verify that we can unmarshall this also if "options" is omitted
options = new(FixBLSStageOptions)
case "org.osbuild.fstab":
options = new(FSTabStageOptions)
case "org.osbuild.grub2":
options = new(GRUB2StageOptions)
case "org.osbuild.locale":
options = new(LocaleStageOptions)
case "org.osbuild.selinux":
options = new(SELinuxStageOptions)
case "org.osbuild.hostname":
options = new(HostnameStageOptions)
case "org.osbuild.users":
options = new(UsersStageOptions)
case "org.osbuild.groups":
options = new(GroupsStageOptions)
case "org.osbuild.timezone":
options = new(TimezoneStageOptions)
case "org.osbuild.chrony":
options = new(ChronyStageOptions)
case "org.osbuild.keymap":
options = new(KeymapStageOptions)
case "org.osbuild.firewall":
options = new(FirewallStageOptions)
case "org.osbuild.rhsm":
options = new(RHSMStageOptions)
case "org.osbuild.rpm":
options = new(RPMStageOptions)
case "org.osbuild.rpm-ostree":
options = new(RPMOSTreeStageOptions)
case "org.osbuild.systemd":
options = new(SystemdStageOptions)
case "org.osbuild.script":
options = new(ScriptStageOptions)
case "org.osbuild.sysconfig":
options = new(SysconfigStageOptions)
case "org.osbuild.kernel-cmdline":
options = new(KernelCmdlineStageOptions)
default:
return fmt.Errorf("unexpected stage name: %s", rawStage.Name)
}
err = json.Unmarshal(rawStage.Options, options)
if err != nil {
return err
}
stage.Name = rawStage.Name
stage.Options = options
return nil
}