Fix: support more Terraform variable types (#3204)

Support Any, set and some complicated variable types

Signed-off-by: Zheng Xi Zhou <zzxwill@gmail.com>

pkg/controller/utils/capability.go

@@ -61,11 +61,13 @@ const (
 	TerraformVariableMap    string = "map"
 	TerraformVariableObject string = "object"
 	TerraformVariableNull   string = ""
+	TerraformVariableAny    string = "any"
 
 	TerraformListTypePrefix   string = "list("
 	TerraformTupleTypePrefix  string = "tuple("
 	TerraformMapTypePrefix    string = "map("
 	TerraformObjectTypePrefix string = "object("
+	TerraformSetTypePrefix    string = "set("
 
 	typeTraitDefinition        = "trait"
 	typeComponentDefinition    = "component"
@@ -157,17 +159,38 @@ func GetOpenAPISchemaFromTerraformComponentDefinition(configuration string) ([]b
 			schema = openapi3.NewArraySchema()
 		case TerraformVariableMap, TerraformVariableObject:
 			schema = openapi3.NewObjectSchema()
+		case TerraformVariableAny:
+			switch v.Default.(type) {
+			case []interface{}:
+				schema = openapi3.NewArraySchema()
+			case map[string]interface{}:
+				schema = openapi3.NewObjectSchema()
+			}
 		case TerraformVariableNull:
-			return nil, fmt.Errorf("null type variable is NOT supported, please specify a type for the variable: %s", v.Name)
+			switch v.Default.(type) {
+			case nil, string:
+				schema = openapi3.NewStringSchema()
+			case []interface{}:
+				schema = openapi3.NewArraySchema()
+			case map[string]interface{}:
+				schema = openapi3.NewObjectSchema()
+			case int, float64:
+				schema = openapi3.NewFloat64Schema()
+			default:
+				return nil, fmt.Errorf("null type variable is NOT supported, please specify a type for the variable: %s", v.Name)
+			}
 		}
 
 		// To identify unusual list type
 		if schema == nil {
 			switch {
-			case strings.HasPrefix(v.Type, TerraformListTypePrefix) || strings.HasPrefix(v.Type, TerraformTupleTypePrefix):
+			case strings.HasPrefix(v.Type, TerraformListTypePrefix) || strings.HasPrefix(v.Type, TerraformTupleTypePrefix) ||
+				strings.HasPrefix(v.Type, TerraformSetTypePrefix):
 				schema = openapi3.NewArraySchema()
 			case strings.HasPrefix(v.Type, TerraformMapTypePrefix) || strings.HasPrefix(v.Type, TerraformObjectTypePrefix):
 				schema = openapi3.NewObjectSchema()
+			default:
+				return nil, fmt.Errorf("the type `%s` of variable %s is NOT supported", v.Type, v.Name)
 			}
 		}
 		schema.Title = k

pkg/controller/utils/capability_test.go

@@ -20,6 +20,7 @@ package utils
 import (
 	"context"
 	"errors"
+	"fmt"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -326,8 +327,38 @@ variable "name" {
   default = "abc"
 }`,
 			want: want{
-				subStr: "",
-				err:    errors.New("null type variable is NOT supported, please specify a type for the variable: name"),
+				subStr: "abc",
+				err:    nil,
+			},
+		},
+		"null type variable, while default value is a slice": {
+			configuration: `
+variable "name" {
+  default = [123]
+}`,
+			want: want{
+				subStr: "123",
+				err:    nil,
+			},
+		},
+		"null type variable, while default value is a map": {
+			configuration: `
+variable "name" {
+  default = {a = 1}
+}`,
+			want: want{
+				subStr: "a",
+				err:    nil,
+			},
+		},
+		"null type variable, while default value is number": {
+			configuration: `
+variable "name" {
+  default = 123
+}`,
+			want: want{
+				subStr: "123",
+				err:    nil,
 			},
 		},
 		"complicated list variable": {
@@ -354,6 +385,38 @@ variable "bbb" {
     config = string
   })
   default = []
+}`,
+			want: want{
+				subStr: "bbb",
+				err:    nil,
+			},
+		},
+		"not supported complicated variable": {
+			configuration: `
+variable "bbb" {
+  type = xxxxx(string)
+}`,
+			want: want{
+				subStr: "",
+				err:    fmt.Errorf("the type `%s` of variable %s is NOT supported", "xxxxx(string)", "bbb"),
+			},
+		},
+		"any type, slice default": {
+			configuration: `
+variable "bbb" {
+  type = any
+  default = []
+}`,
+			want: want{
+				subStr: "bbb",
+				err:    nil,
+			},
+		},
+		"any type, map default": {
+			configuration: `
+variable "bbb" {
+  type = any
+  default = {}
 }`,
 			want: want{
 				subStr: "bbb",