1 files changed, 17 insertions, 0 deletions

diff --git a/vendor/github.com/hashicorp/terraform/config/interpolate_funcs.go b/vendor/github.com/hashicorp/terraform/config/interpolate_funcs.go
index 7b7b3f2..a298cf2 100644
--- a/vendor/github.com/hashicorp/terraform/config/interpolate_funcs.go
+++ b/vendor/github.com/hashicorp/terraform/config/interpolate_funcs.go
@@ -70,6 +70,7 @@ func Funcs() map[string]ast.Function {
                 "coalescelist": interpolationFuncCoalesceList(),
                 "compact":      interpolationFuncCompact(),
                 "concat":       interpolationFuncConcat(),
+                "contains":     interpolationFuncContains(),
                 "dirname":      interpolationFuncDirname(),
                 "distinct":     interpolationFuncDistinct(),
                 "element":      interpolationFuncElement(),
@@ -356,6 +357,22 @@ func interpolationFuncCoalesceList() ast.Function {
         }
 }
 
+// interpolationFuncContains returns true if an element is in the list
+// and return false otherwise
+func interpolationFuncContains() ast.Function {
+        return ast.Function{
+                ArgTypes:   []ast.Type{ast.TypeList, ast.TypeString},
+                ReturnType: ast.TypeBool,
+                Callback: func(args []interface{}) (interface{}, error) {
+                        _, err := interpolationFuncIndex().Callback(args)
+                        if err != nil {
+                                return false, nil
+                        }
+                        return true, nil
+                },
+        }
+}
+
 // interpolationFuncConcat implements the "concat" function that concatenates
 // multiple lists.
 func interpolationFuncConcat() ast.Function {