// nounAddVariableDeps updates the dependencies of a noun given
// a set of associated variable values
func nounAddVariableDeps(
g *depgraph.Graph,
n *depgraph.Noun,
vars map[string]config.InterpolatedVariable,
removeSelf bool) {
for _, v := range vars {
// Only resource variables impose dependencies
rv, ok := v.(*config.ResourceVariable)
if !ok {
continue
}
// Find the target
target := g.Noun(rv.ResourceId())
if target == nil {
continue
}
// If we're ignoring self-references, then don't add that
// dependency.
if removeSelf && n == target {
continue
}
// Build the dependency
dep := &depgraph.Dependency{
Name: rv.ResourceId(),
Source: n,
Target: target,
}
n.Deps = append(n.Deps, dep)
}
}
// graphAddMissingResourceProviders adds GraphNodeResourceProvider nodes for
// the resources that do not have an explicit resource provider specified
// because no provider configuration was given.
func graphAddMissingResourceProviders(
g *depgraph.Graph,
ps map[string]ResourceProviderFactory) error {
var errs []error
for _, n := range g.Nouns {
rn, ok := n.Meta.(*GraphNodeResource)
if !ok {
continue
}
if rn.ResourceProviderID != "" {
continue
}
prefixes := matchingPrefixes(rn.Type, ps)
if len(prefixes) == 0 {
errs = append(errs, fmt.Errorf(
"No matching provider for type: %s",
rn.Type))
continue
}
// The resource provider ID is simply the shortest matching
// prefix, since that'll give us the most resource providers
// to choose from.
rn.ResourceProviderID = prefixes[len(prefixes)-1]
// If we don't have a matching noun for this yet, insert it.
pn := g.Noun(fmt.Sprintf("provider.%s", rn.ResourceProviderID))
if pn == nil {
pn = &depgraph.Noun{
Name: fmt.Sprintf("provider.%s", rn.ResourceProviderID),
Meta: &GraphNodeResourceProvider{
ID: rn.ResourceProviderID,
Config: nil,
},
}
g.Nouns = append(g.Nouns, pn)
}
// Add the provider configuration noun as a dependency
dep := &depgraph.Dependency{
Name: pn.Name,
Source: n,
Target: pn,
}
n.Deps = append(n.Deps, dep)
}
if len(errs) > 0 {
return &multierror.Error{Errors: errs}
}
return nil
}