// parseCloudConfig parses the provided config into a node structure and logs
// any parsing issues into the provided report. Unrecoverable errors are
// returned as an error.
func parseCloudConfig(cfg []byte, report *Report) (node, error) {
yaml.UnmarshalMappingKeyTransform = func(nameIn string) (nameOut string) {
return nameIn
}
// unmarshal the config into an implicitly-typed form. The yaml library
// will implicitly convert types into their normalized form
// (e.g. 0744 -> 484, off -> false).
var weak map[interface{}]interface{}
if err := yaml.Unmarshal(cfg, &weak); err != nil {
matches := yamlLineError.FindStringSubmatch(err.Error())
if len(matches) == 3 {
line, err := strconv.Atoi(matches[1])
if err != nil {
return node{}, err
}
msg := matches[2]
report.Error(line, msg)
return node{}, nil
}
matches = yamlError.FindStringSubmatch(err.Error())
if len(matches) == 2 {
report.Error(1, matches[1])
return node{}, nil
}
return node{}, errors.New("couldn't parse yaml error")
}
w := NewNode(weak, NewContext(cfg))
w = normalizeNodeNames(w, report)
// unmarshal the config into the explicitly-typed form.
yaml.UnmarshalMappingKeyTransform = func(nameIn string) (nameOut string) {
return strings.Replace(nameIn, "-", "_", -1)
}
var strong config.CloudConfig
if err := yaml.Unmarshal([]byte(cfg), &strong); err != nil {
return node{}, err
}
s := NewNode(strong, NewContext(cfg))
// coerceNodes weak nodes and strong nodes. strong nodes replace weak nodes
// if they are compatible types (this happens when the yaml library
// converts the input).
// (e.g. weak 484 is replaced by strong 0744, weak 4 is not replaced by
// strong false)
return coerceNodes(w, s), nil
}
func (s *S) TestUnmarshalErrors(c *C) {
for _, item := range unmarshalErrorTests {
var value interface{}
err := yaml.Unmarshal([]byte(item.data), &value)
c.Assert(err, ErrorMatches, item.error, Commentf("Partial unmarshal: %#v", value))
}
}
func (s *S) TestUnmarshal(c *C) {
for i, item := range unmarshalTests {
t := reflect.ValueOf(item.value).Type()
var value interface{}
switch t.Kind() {
case reflect.Map:
value = reflect.MakeMap(t).Interface()
case reflect.String:
t := reflect.ValueOf(item.value).Type()
v := reflect.New(t)
value = v.Interface()
default:
pt := reflect.ValueOf(item.value).Type()
pv := reflect.New(pt.Elem())
value = pv.Interface()
}
err := yaml.Unmarshal([]byte(item.data), value)
c.Assert(err, IsNil, Commentf("Item #%d", i))
if t.Kind() == reflect.String {
c.Assert(*value.(*string), Equals, item.value, Commentf("Item #%d", i))
} else {
c.Assert(value, DeepEquals, item.value, Commentf("Item #%d", i))
}
}
}
// NewCloudConfig instantiates a new CloudConfig from the given contents (a
// string of YAML), returning any error encountered. It will ignore unknown
// fields but log encountering them.
func NewCloudConfig(contents string) (*CloudConfig, error) {
yaml.UnmarshalMappingKeyTransform = func(nameIn string) (nameOut string) {
return strings.Replace(nameIn, "-", "_", -1)
}
var cfg CloudConfig
err := yaml.Unmarshal([]byte(contents), &cfg)
return &cfg, err
}
func (s *S) TestUnmarshalWholeDocumentWithSetter(c *C) {
obj := &typeWithSetter{}
err := yaml.Unmarshal([]byte(setterTests[0].data), obj)
c.Assert(err, IsNil)
c.Assert(obj.tag, Equals, setterTests[0].tag)
value, ok := obj.value.(map[interface{}]interface{})
c.Assert(ok, Equals, true)
c.Assert(value["_"], DeepEquals, setterTests[0].value)
}
func (s *S) TestUnmarshalWithValueSetter(c *C) {
for _, item := range setterTests {
obj := &setterValueType{}
err := yaml.Unmarshal([]byte(item.data), obj)
c.Assert(err, IsNil)
c.Assert(obj.Field, NotNil, Commentf("Pointer not initialized (%#v)", item.value))
c.Assert(obj.Field.tag, Equals, item.tag)
c.Assert(obj.Field.value, DeepEquals, item.value)
}
}
func (s *S) TestUnmarshalNull(c *C) {
for _, test := range unmarshalNullTests {
item := test()
zero := reflect.Zero(reflect.TypeOf(item).Elem()).Interface()
err := yaml.Unmarshal([]byte("null"), item)
c.Assert(err, IsNil)
if reflect.TypeOf(item).Kind() == reflect.Map {
c.Assert(reflect.ValueOf(item).Interface(), DeepEquals, reflect.MakeMap(reflect.TypeOf(item)).Interface())
} else {
c.Assert(reflect.ValueOf(item).Elem().Interface(), DeepEquals, zero)
}
}
}
func (s *S) TestUnmarshalWithTransform(c *C) {
data := `{a_b: 1, c-d: 2, e-f_g: 3, h_i-j: 4}`
expect := map[string]int{
"a_b": 1,
"c_d": 2,
"e_f_g": 3,
"h_i_j": 4,
}
m := map[string]int{}
yaml.UnmarshalMappingKeyTransform = func(i string) string {
return strings.Replace(i, "-", "_", -1)
}
err := yaml.Unmarshal([]byte(data), m)
c.Assert(err, IsNil)
c.Assert(m, DeepEquals, expect)
}
func (s *S) TestMergeStruct(c *C) {
type Data struct {
X, Y, R int
Label string
}
want := Data{1, 2, 10, "center/big"}
var m map[string]Data
err := yaml.Unmarshal([]byte(mergeTests), &m)
c.Assert(err, IsNil)
for name, test := range m {
if name == "anchors" {
continue
}
c.Assert(test, Equals, want, Commentf("test %q failed", name))
}
}
func (s *S) TestMerge(c *C) {
var want = map[interface{}]interface{}{
"x": 1,
"y": 2,
"r": 10,
"label": "center/big",
}
var m map[string]interface{}
err := yaml.Unmarshal([]byte(mergeTests), &m)
c.Assert(err, IsNil)
for name, test := range m {
if name == "anchors" {
continue
}
c.Assert(test, DeepEquals, want, Commentf("test %q failed", name))
}
}
func (s *S) TestUnmarshalWithFalseSetterIgnoresValue(c *C) {
setterResult[2] = false
setterResult[4] = false
defer func() {
delete(setterResult, 2)
delete(setterResult, 4)
}()
m := map[string]*typeWithSetter{}
data := `{abc: 1, def: 2, ghi: 3, jkl: 4}`
err := yaml.Unmarshal([]byte(data), m)
c.Assert(err, IsNil)
c.Assert(m["abc"], NotNil)
c.Assert(m["def"], IsNil)
c.Assert(m["ghi"], NotNil)
c.Assert(m["jkl"], IsNil)
c.Assert(m["abc"].value, Equals, 1)
c.Assert(m["ghi"].value, Equals, 3)
}
func (s *S) TestUnmarshalNaN(c *C) {
value := map[string]interface{}{}
err := yaml.Unmarshal([]byte("notanum: .NaN"), &value)
c.Assert(err, IsNil)
c.Assert(math.IsNaN(value["notanum"].(float64)), Equals, true)
}