Removes carriage return characters from CF stacks during normalize

.changelog/14270.txt

@@ -0,0 +1,7 @@
+```release-note:bug
+resource/aws_cloudformation_stack: CRLF line endings in `template_body` no longer cause erroneous diffs
+```
+
+```release-note:note
+provider: When using YAML or JSON documents, such as in `template_body` of `aws_cloudformation_stack`, CRLF was previously treated as different from LF but these are now treated as equivalent in many situations
+```

internal/verify/json.go

@@ -85,6 +85,9 @@ func SuppressEquivalentJSONOrYAMLDiffs(k, old, new string, d *schema.ResourceDat
 }
 
 func NormalizeJSONOrYAMLString(templateString interface{}) (string, error) {
+ if v, ok := templateString.(string); ok {
+ templateString = strings.ReplaceAll(v, "\r\n", "\n")
+ }
  if looksLikeJSONString(templateString) {
  return structure.NormalizeJsonString(templateString.(string))
  }

internal/verify/json_test.go

@@ -384,14 +384,25 @@ func TestNormalizeJSONOrYAMLString(t *testing.T) {
  t.Fatalf("Got:\n\n%s\n\nExpected:\n\n%s\n", actual, validNormalizedJSON)
  }
 
- validNormalizedYaml := `abc: 1
+ validNormalizedYAML := `abc: 1
 `
- actual, err = NormalizeJSONOrYAMLString(validNormalizedYaml)
+ actual, err = NormalizeJSONOrYAMLString(validNormalizedYAML)
  if err != nil {
  t.Fatalf("Expected not to throw an error while parsing template, but got: %s", err)
  }
- if actual != validNormalizedYaml {
- t.Fatalf("Got:\n\n%s\n\nExpected:\n\n%s\n", actual, validNormalizedYaml)
+ if actual != validNormalizedYAML {
+ t.Fatalf("Got:\n\n%s\n\nExpected:\n\n%s\n", actual, validNormalizedYAML)
+ }
+
+ validNormalizedYAMLWithCarriageReturn := "abc: 1\r\n"
+ expectedNormalizedYAML := `abc: 1
+`
+ actual, err = NormalizeJSONOrYAMLString(validNormalizedYAMLWithCarriageReturn)
+ if err != nil {
+ t.Fatalf("Expected not to throw an error while parsing template, but got: %s", err)
+ }
+ if actual != expectedNormalizedYAML {
+ t.Fatalf("Got:\n\n%s\n\nExpected:\n\n%s\n", actual, expectedNormalizedYAML)
  }
 }