func MakeRef(sources fallbackmap.Deep, rules *template.Rules) template.Rule {
return func(path []interface{}, node interface{}) (interface{}, interface{}) {
key := interface{}(nil)
if len(path) > 0 {
key = path[len(path)-1]
}
argInterface, ok := singleKey(node, "Ref")
if !ok {
return key, node //passthru
}
var argString string
if argString, ok = argInterface.(string); !ok {
return key, node //passthru
}
var refpath []string
for _, part := range deepalias.Split(argString) {
refpath = append(refpath, part)
}
var newNode interface{}
newNode, ok = sources.Get(refpath)
if ok {
var newKey interface{}
newKey, newNode = template.Walk(path, newNode, rules)
return newKey, newNode
}
return key, node //passthru (ref not found)
}
}
func testGetNil(i fallbackmap.Deep, path []string, t *testing.T) {
v, ok := i.Get(path)
if v != nil {
t.Fatalf("getting of %v returned nil", path)
}
if ok {
t.Fatalf("getting of %v returned a result", path)
}
}
func testGetString(i fallbackmap.Deep, path []string, value string, t *testing.T) {
v, ok := i.Get(path)
if !ok {
t.Fatalf("getting of %v did not return a result", path)
}
vs, ok := v.(string)
if !ok {
t.Fatalf("getting of %v did not return an string (got %v instead)", path, v)
}
if vs != value {
t.Fatalf("getting of %v did not return expected result (%v)", path, value)
}
}
func testGetInt(i fallbackmap.Deep, path []string, value int, t *testing.T) {
v, ok := i.Get(path)
if !ok {
t.Fatalf("getting of %v did not return a result", path)
}
vi, ok := v.(int)
if !ok {
t.Fatalf("getting of %v did not return an int (got %v instead)", path, v)
}
if vi != value {
t.Fatalf("getting of %v did not return expected result (%v)", path, value)
}
}
func DeAlias(path []string, deep fallbackmap.Deep) ([]string, bool) {
did_translate := false
translated := []string{}
for _, component := range path {
if strings.HasPrefix(component, "[") && strings.HasSuffix(component, "]") {
alias_path := strings.Split(component[1:len(component)-1], ".")
dereferenced_component, found := deep.Get(alias_path)
if found {
dereferenced_component_string, ok := dereferenced_component.(string)
if ok {
component = dereferenced_component_string
did_translate = true
}
}
}
translated = append(translated, component)
}
return translated, did_translate
}