// setImplicitConstraints adds implicit constraints to the job based on the
// features it is requesting.
func setImplicitConstraints(j *structs.Job) {
// Get the required Vault Policies
policies := j.VaultPolicies()
// Get the required signals
signals := j.RequiredSignals()
// Hot path
if len(signals) == 0 && len(policies) == 0 {
return
}
// Add Vault constraints
for _, tg := range j.TaskGroups {
_, ok := policies[tg.Name]
if !ok {
// Not requesting Vault
continue
}
found := false
for _, c := range tg.Constraints {
if c.Equal(vaultConstraint) {
found = true
break
}
}
if !found {
tg.Constraints = append(tg.Constraints, vaultConstraint)
}
}
// Add signal constraints
for _, tg := range j.TaskGroups {
tgSignals, ok := signals[tg.Name]
if !ok {
// Not requesting Vault
continue
}
// Flatten the signals
required := structs.MapStringStringSliceValueSet(tgSignals)
sigConstraint := getSignalConstraint(required)
found := false
for _, c := range tg.Constraints {
if c.Equal(sigConstraint) {
found = true
break
}
}
if !found {
tg.Constraints = append(tg.Constraints, sigConstraint)
}
}
}