| package funcs |
| |
| import ( |
| "regexp" |
| "strings" |
| |
| "github.com/zclconf/go-cty/cty" |
| "github.com/zclconf/go-cty/cty/function" |
| ) |
| |
| // ReplaceFunc constructs a function that searches a given string for another |
| // given substring, and replaces each occurence with a given replacement string. |
| var ReplaceFunc = function.New(&function.Spec{ |
| Params: []function.Parameter{ |
| { |
| Name: "str", |
| Type: cty.String, |
| }, |
| { |
| Name: "substr", |
| Type: cty.String, |
| }, |
| { |
| Name: "replace", |
| Type: cty.String, |
| }, |
| }, |
| Type: function.StaticReturnType(cty.String), |
| Impl: func(args []cty.Value, retType cty.Type) (ret cty.Value, err error) { |
| str := args[0].AsString() |
| substr := args[1].AsString() |
| replace := args[2].AsString() |
| |
| // We search/replace using a regexp if the string is surrounded |
| // in forward slashes. |
| if len(substr) > 1 && substr[0] == '/' && substr[len(substr)-1] == '/' { |
| re, err := regexp.Compile(substr[1 : len(substr)-1]) |
| if err != nil { |
| return cty.UnknownVal(cty.String), err |
| } |
| |
| return cty.StringVal(re.ReplaceAllString(str, replace)), nil |
| } |
| |
| return cty.StringVal(strings.Replace(str, substr, replace, -1)), nil |
| }, |
| }) |
| |
| // Replace searches a given string for another given substring, |
| // and replaces all occurences with a given replacement string. |
| func Replace(str, substr, replace cty.Value) (cty.Value, error) { |
| return ReplaceFunc.Call([]cty.Value{str, substr, replace}) |
| } |