func installSnap(chg *state.Change, name, channel string, userID int, flags snappy.InstallFlags) error {
st := chg.State()
ts, err := snapstateInstall(st, name, channel, userID, flags)
if err != nil {
return err
}
// ensure that each of our task runs after the existing tasks
chgts := state.NewTaskSet(chg.Tasks()...)
for _, t := range ts.Tasks() {
t.WaitAll(chgts)
}
chg.AddAll(ts)
return nil
}
func change2changeInfo(chg *state.Change) *changeInfo {
status := chg.Status()
chgInfo := &changeInfo{
ID: chg.ID(),
Kind: chg.Kind(),
Summary: chg.Summary(),
Status: status.String(),
Ready: status.Ready(),
SpawnTime: chg.SpawnTime(),
}
readyTime := chg.ReadyTime()
if !readyTime.IsZero() {
chgInfo.ReadyTime = &readyTime
}
if err := chg.Err(); err != nil {
chgInfo.Err = err.Error()
}
tasks := chg.Tasks()
taskInfos := make([]*taskInfo, len(tasks))
for j, t := range tasks {
done, total := t.Progress()
taskInfo := &taskInfo{
ID: t.ID(),
Kind: t.Kind(),
Summary: t.Summary(),
Status: t.Status().String(),
Log: t.Log(),
Progress: taskInfoProgress{
Done: done,
Total: total,
},
SpawnTime: t.SpawnTime(),
}
readyTime := t.ReadyTime()
if !readyTime.IsZero() {
taskInfo.ReadyTime = &readyTime
}
taskInfos[j] = taskInfo
}
chgInfo.Tasks = taskInfos
return chgInfo
}
func ensureChange(c *C, r *state.TaskRunner, sb *stateBackend, chg *state.Change) {
for i := 0; i < 10; i++ {
sb.ensureBefore = time.Hour
r.Ensure()
r.Wait()
chg.State().Lock()
s := chg.Status()
chg.State().Unlock()
if s.Ready() {
return
}
if sb.ensureBefore > 0 {
break
}
}
var statuses []string
chg.State().Lock()
for _, t := range chg.Tasks() {
statuses = append(statuses, t.Summary()+":"+t.Status().String())
}
chg.State().Unlock()
c.Fatalf("Change didn't reach final state without blocking: %s", strings.Join(statuses, " "))
}