// BuildStack fetches stack details from MongoDB.
//
// When nil error is returned, the b.Stack field is non-nil.
func (b *Builder) BuildStack(stackID string, credentials map[string][]string) error {
var overallErr error
computeStack, err := modelhelper.GetComputeStack(stackID)
if err != nil {
return models.ResError(err, "jComputeStack")
}
b.Stack = &stack.Stack{
ID: computeStack.Id,
Stack: computeStack,
Machines: make([]string, len(computeStack.Machines)),
Credentials: make(map[string][]string),
}
for i, m := range b.Stack.Stack.Machines {
b.Stack.Machines[i] = m.Hex()
}
baseStackID := b.Stack.Stack.BaseStackId.Hex()
// If fetching jStackTemplate fails, it might got deleted outside.
// Continue building stack and let the caller decide, whether missing
// jStackTemplate is fatal or not (e.g. for apply operations it's fatal,
// for destroy ones - not).
if stackTemplate, err := modelhelper.GetStackTemplate(baseStackID); err == nil {
// first copy admin/group based credentials
for k, v := range stackTemplate.Credentials {
b.Stack.Credentials[k] = v
}
b.Stack.Template = stackTemplate.Template.Content
} else {
overallErr = models.ResError(err, "jStackTemplate")
}
// copy user based credentials
for k, v := range computeStack.Credentials {
// however don't override anything the admin already added
if _, ok := b.Stack.Credentials[k]; !ok {
b.Stack.Credentials[k] = v
}
}
// Set or override credentials when passed in apply request.
for k, v := range credentials {
if len(v) != 0 {
b.Stack.Credentials[k] = v
}
}
b.Log.Debug("Stack built: len(machines)=%d, len(credentials)=%d, overallErr=%v",
len(b.Stack.Machines), len(b.Stack.Credentials), overallErr)
return overallErr
}
// BuildStackTemplate fetched stack template details from MongoDB.
//
// When nil error is returned, the b.StackTemplate field is guaranteed to be non-nil.
func (b *Builder) BuildStackTemplate(templateID string) error {
var err error
if b.StackTemplate, err = modelhelper.GetStackTemplate(templateID); err != nil {
return models.ResError(err, "jStackTemplate")
}
if b.StackTemplate.Template.Content == "" {
return errors.New("Stack template content is empty")
}
return nil
}