package helpers import ( "encoding/json" "unicode" "unicode/utf8" "github.com/hashicorp/hcl" ) // hclDecode is a modified version of hcl.Decode just for the super general // purposes here. There's some strange bug in how hcl.Decode decodes json where // // { "sub" : { "v1" : { "field" : "value1" }, "v2" : { "field" : "value2" } } } // // hcl.Decode-s into: // // map[string]interface {}{ // "sub":[]map[string]interface {}{ // map[string]interface {}{ // "v1":[]map[string]interface {}{ // map[string]interface {}{ // "field":"value1" // } // } // }, // map[string]interface {}{ // "v2":[]map[string]interface {}{ // map[string]interface {}{ // "field":"value2" // } // } // } // } // } // // but json.Unmarshal-s into the more expected: // // map[string]interface {}{ // "sub":map[string]interface {}{ // "v1":map[string]interface {}{ // "field":"value1" // }, // "v2":map[string]interface {}{ // "field":"value2" // } // } // } // // The strange part is that the following HCL: // // sub { "v1" = { field = "value1" }, "v2" = { field = "value2" } } // // hcl.Decode-s into: // // map[string]interface {}{ // "sub":[]map[string]interface {}{ // map[string]interface {}{ // "v1":[]map[string]interface {}{ // map[string]interface {}{ // "field":"value1" // } // }, // "v2":[]map[string]interface {}{ // map[string]interface {}{ // "field":"value2" // } // } // } // } // } // // Which is the "correct" value assuming you did the patch-slice-of-maps correction. // // Given that HCLv1 is basically frozen and the HCL part of it is fine instead // of trying to track down a weird bug we'll bypass the weird JSON decoder and just use // the stdlib one. func hclDecode(out interface{}, in string) error { data := []byte(in) if isHCL(data) { return hcl.Decode(out, in) } return json.Unmarshal(data, out) } // this is an inlined variant of hcl.lexMode() func isHCL(v []byte) bool { var ( r rune w int offset int ) for { r, w = utf8.DecodeRune(v[offset:]) offset += w if unicode.IsSpace(r) { continue } if r == '{' { return false } break } return true }