Vendor dependencies with vndr

This fixes issue #123

1 files changed, 208 insertions, 0 deletions

diff --git a/vendor/github.com/hashicorp/terraform/helper/schema/field_reader_diff.go b/vendor/github.com/hashicorp/terraform/helper/schema/field_reader_diff.go
new file mode 100644
index 00000000..16bbae29
--- /dev/null
+++ b/vendor/github.com/hashicorp/terraform/helper/schema/field_reader_diff.go
@@ -0,0 +1,208 @@
+package schema
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/hashicorp/terraform/terraform"
+	"github.com/mitchellh/mapstructure"
+)
+
+// DiffFieldReader reads fields out of a diff structures.
+//
+// It also requires access to a Reader that reads fields from the structure
+// that the diff was derived from. This is usually the state. This is required
+// because a diff on its own doesn't have complete data about full objects
+// such as maps.
+//
+// The Source MUST be the data that the diff was derived from. If it isn't,
+// the behavior of this struct is undefined.
+//
+// Reading fields from a DiffFieldReader is identical to reading from
+// Source except the diff will be applied to the end result.
+//
+// The "Exists" field on the result will be set to true if the complete
+// field exists whether its from the source, diff, or a combination of both.
+// It cannot be determined whether a retrieved value is composed of
+// diff elements.
+type DiffFieldReader struct {
+	Diff   *terraform.InstanceDiff
+	Source FieldReader
+	Schema map[string]*Schema
+}
+
+func (r *DiffFieldReader) ReadField(address []string) (FieldReadResult, error) {
+	schemaList := addrToSchema(address, r.Schema)
+	if len(schemaList) == 0 {
+		return FieldReadResult{}, nil
+	}
+
+	schema := schemaList[len(schemaList)-1]
+	switch schema.Type {
+	case TypeBool, TypeInt, TypeFloat, TypeString:
+		return r.readPrimitive(address, schema)
+	case TypeList:
+		return readListField(r, address, schema)
+	case TypeMap:
+		return r.readMap(address, schema)
+	case TypeSet:
+		return r.readSet(address, schema)
+	case typeObject:
+		return readObjectField(r, address, schema.Elem.(map[string]*Schema))
+	default:
+		panic(fmt.Sprintf("Unknown type: %#v", schema.Type))
+	}
+}
+
+func (r *DiffFieldReader) readMap(
+	address []string, schema *Schema) (FieldReadResult, error) {
+	result := make(map[string]interface{})
+	resultSet := false
+
+	// First read the map from the underlying source
+	source, err := r.Source.ReadField(address)
+	if err != nil {
+		return FieldReadResult{}, err
+	}
+	if source.Exists {
+		result = source.Value.(map[string]interface{})
+		resultSet = true
+	}
+
+	// Next, read all the elements we have in our diff, and apply
+	// the diff to our result.
+	prefix := strings.Join(address, ".") + "."
+	for k, v := range r.Diff.Attributes {
+		if !strings.HasPrefix(k, prefix) {
+			continue
+		}
+		if strings.HasPrefix(k, prefix+"%") {
+			// Ignore the count field
+			continue
+		}
+
+		resultSet = true
+
+		k = k[len(prefix):]
+		if v.NewRemoved {
+			delete(result, k)
+			continue
+		}
+
+		result[k] = v.New
+	}
+
+	err = mapValuesToPrimitive(result, schema)
+	if err != nil {
+		return FieldReadResult{}, nil
+	}
+
+	var resultVal interface{}
+	if resultSet {
+		resultVal = result
+	}
+
+	return FieldReadResult{
+		Value:  resultVal,
+		Exists: resultSet,
+	}, nil
+}
+
+func (r *DiffFieldReader) readPrimitive(
+	address []string, schema *Schema) (FieldReadResult, error) {
+	result, err := r.Source.ReadField(address)
+	if err != nil {
+		return FieldReadResult{}, err
+	}
+
+	attrD, ok := r.Diff.Attributes[strings.Join(address, ".")]
+	if !ok {
+		return result, nil
+	}
+
+	var resultVal string
+	if !attrD.NewComputed {
+		resultVal = attrD.New
+		if attrD.NewExtra != nil {
+			result.ValueProcessed = resultVal
+			if err := mapstructure.WeakDecode(attrD.NewExtra, &resultVal); err != nil {
+				return FieldReadResult{}, err
+			}
+		}
+	}
+
+	result.Computed = attrD.NewComputed
+	result.Exists = true
+	result.Value, err = stringToPrimitive(resultVal, false, schema)
+	if err != nil {
+		return FieldReadResult{}, err
+	}
+
+	return result, nil
+}
+
+func (r *DiffFieldReader) readSet(
+	address []string, schema *Schema) (FieldReadResult, error) {
+	prefix := strings.Join(address, ".") + "."
+
+	// Create the set that will be our result
+	set := schema.ZeroValue().(*Set)
+
+	// Go through the map and find all the set items
+	for k, d := range r.Diff.Attributes {
+		if d.NewRemoved {
+			// If the field is removed, we always ignore it
+			continue
+		}
+		if !strings.HasPrefix(k, prefix) {
+			continue
+		}
+		if strings.HasSuffix(k, "#") {
+			// Ignore any count field
+			continue
+		}
+
+		// Split the key, since it might be a sub-object like "idx.field"
+		parts := strings.Split(k[len(prefix):], ".")
+		idx := parts[0]
+
+		raw, err := r.ReadField(append(address, idx))
+		if err != nil {
+			return FieldReadResult{}, err
+		}
+		if !raw.Exists {
+			// This shouldn't happen because we just verified it does exist
+			panic("missing field in set: " + k + "." + idx)
+		}
+
+		set.Add(raw.Value)
+	}
+
+	// Determine if the set "exists". It exists if there are items or if
+	// the diff explicitly wanted it empty.
+	exists := set.Len() > 0
+	if !exists {
+		// We could check if the diff value is "0" here but I think the
+		// existence of "#" on its own is enough to show it existed. This
+		// protects us in the future from the zero value changing from
+		// "0" to "" breaking us (if that were to happen).
+		if _, ok := r.Diff.Attributes[prefix+"#"]; ok {
+			exists = true
+		}
+	}
+
+	if !exists {
+		result, err := r.Source.ReadField(address)
+		if err != nil {
+			return FieldReadResult{}, err
+		}
+		if result.Exists {
+			return result, nil
+		}
+	}
+
+	return FieldReadResult{
+		Value:  set,
+		Exists: exists,
+	}, nil
+}