github.com/khulnasoft-lab/defsec@v1.0.5-0.20230827010352-5e9f46893d95/pkg/scanners/terraform/parser/funcs/string.go (about)

     1  // Copied from github.com/hashicorp/terraform/internal/lang/funcs
     2  package funcs
     3  
     4  import (
     5  	"regexp"
     6  	"strings"
     7  
     8  	"github.com/zclconf/go-cty/cty"
     9  	"github.com/zclconf/go-cty/cty/function"
    10  )
    11  
    12  // ReplaceFunc constructs a function that searches a given string for another
    13  // given substring, and replaces each occurrence with a given replacement string.
    14  var ReplaceFunc = function.New(&function.Spec{
    15  	Params: []function.Parameter{
    16  		{
    17  			Name: "str",
    18  			Type: cty.String,
    19  		},
    20  		{
    21  			Name: "substr",
    22  			Type: cty.String,
    23  		},
    24  		{
    25  			Name: "replace",
    26  			Type: cty.String,
    27  		},
    28  	},
    29  	Type: function.StaticReturnType(cty.String),
    30  	Impl: func(args []cty.Value, retType cty.Type) (ret cty.Value, err error) {
    31  		str := args[0].AsString()
    32  		substr := args[1].AsString()
    33  		replace := args[2].AsString()
    34  
    35  		// We search/replace using a regexp if the string is surrounded
    36  		// in forward slashes.
    37  		if len(substr) > 1 && substr[0] == '/' && substr[len(substr)-1] == '/' {
    38  			re, err := regexp.Compile(substr[1 : len(substr)-1])
    39  			if err != nil {
    40  				return cty.UnknownVal(cty.String), err
    41  			}
    42  
    43  			return cty.StringVal(re.ReplaceAllString(str, replace)), nil
    44  		}
    45  
    46  		return cty.StringVal(strings.Replace(str, substr, replace, -1)), nil
    47  	},
    48  })
    49  
    50  // Replace searches a given string for another given substring,
    51  // and replaces all occurrences with a given replacement string.
    52  func Replace(str, substr, replace cty.Value) (cty.Value, error) {
    53  	return ReplaceFunc.Call([]cty.Value{str, substr, replace})
    54  }