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

     1  package parser
     2  
     3  import (
     4  	"strings"
     5  
     6  	"github.com/khulnasoft-lab/defsec/pkg/scanners/cloudformation/cftypes"
     7  )
     8  
     9  func ResolveJoin(property *Property) (resolved *Property, success bool) {
    10  	if !property.isFunction() {
    11  		return property, true
    12  	}
    13  
    14  	refValue := property.AsMap()["Fn::Join"].AsList()
    15  
    16  	if len(refValue) != 2 {
    17  		return abortIntrinsic(property, "Fn::Join should have exactly 2 values, returning original Property")
    18  	}
    19  
    20  	joiner := refValue[0].AsString()
    21  	items := refValue[1].AsList()
    22  
    23  	var itemValues []string
    24  	for _, item := range items {
    25  		resolved, success := item.resolveValue()
    26  		if success {
    27  			itemValues = append(itemValues, resolved.AsString())
    28  		}
    29  	}
    30  
    31  	joined := strings.Join(itemValues, joiner)
    32  
    33  	return property.deriveResolved(cftypes.String, joined), true
    34  }