hook

type Committer interface {
	CommitHook(Info) error
}

type Info struct {
	Kind hooks.Kind `yaml:"kind"`

	// RelationId identifies the relation associated with the hook.
	// It is only set when Kind indicates a relation hook.
	RelationId int `yaml:"relation-id,omitempty"`

	// RemoteUnit is the name of the unit that triggered the hook.
	// It is only set when Kind indicates a relation hook other than
	// relation-created or relation-broken.
	RemoteUnit string `yaml:"remote-unit,omitempty"`

	// RemoteApplication is always set if either an app or a unit triggers
	// the hook. If the app triggers the hook, then RemoteUnit will be empty.
	RemoteApplication string `yaml:"remote-application,omitempty"`

	// ChangeVersion identifies the most recent unit settings change
	// associated with RemoteUnit. It is only set when RemoteUnit is set.
	ChangeVersion int64 `yaml:"change-version,omitempty"`

	// StorageId is the ID of the storage instance relevant to the hook.
	StorageId string `yaml:"storage-id,omitempty"`

	// DepartingUnit is the name of the unit that goes away. It is only set
	// when Kind indicates a relation-departed hook.
	DepartingUnit string `yaml:"departee,omitempty"`

	// WorkloadName is the name of the sidecar container or workload relevant to the hook.
	WorkloadName string `yaml:"workload-name,omitempty"`

	// NoticeID is the Pebble notice ID associated with the hook.
	NoticeID string `yaml:"notice-id,omitempty"`

	// NoticeType is the Pebble notice type associated with the hook.
	NoticeType string `yaml:"notice-type,omitempty"`

	// NoticeKey is the Pebble notice key associated with the hook.
	NoticeKey string `yaml:"notice-key,omitempty"`

	// MachineUpgradeTarget is the base that the unit's machine is to be
	// updated to when Juju is issued the `upgrade-machine` command.
	// It is only set for the pre-series-upgrade hook.
	MachineUpgradeTarget string `yaml:"series-upgrade-target,omitempty"`

	// SecretURI is the secret URI relevant to the hook.
	SecretURI string `yaml:"secret-uri,omitempty"`

	// SecretRevision is the secret revision relevant to the hook.
	SecretRevision int `yaml:"secret-revision,omitempty"`

	// SecretLabel is the secret label to expose to the hook.
	SecretLabel string `yaml:"secret-label,omitempty"`
}

type Validator interface {
	ValidateHook(Info) error
}