fix: include missing param in parsing cache key construction (gruntwo…

…rk-io#2518)

config/config_partial.go

@@ -159,7 +159,7 @@ func PartialParseConfigFile(
 var terragruntConfigCache = NewTerragruntConfigCache()
 
 // Wrapper of PartialParseConfigString which checks for cached configs.
-// configString, includeFromChild and decodeList are used for the cache key,
+// filename, configString, includeFromChild and decodeList are used for the cache key,
 // by getting the default value (%#v) through fmt.
 func TerragruntConfigFromPartialConfigString(
 	configString string,
@@ -169,19 +169,19 @@ func TerragruntConfigFromPartialConfigString(
 	decodeList []PartialDecodeSectionType,
 ) (*TerragruntConfig, error) {
 	if terragruntOptions.UsePartialParseConfigCache {
-		var cacheKey = fmt.Sprintf("%#v-%#v-%#v", configString, includeFromChild, decodeList)
+		var cacheKey = fmt.Sprintf("%#v-%#v-%#v-%#v", filename, configString, includeFromChild, decodeList)
 		var config, found = terragruntConfigCache.Get(cacheKey)
 
 		if !found {
-			terragruntOptions.Logger.Debugf("Cache miss for '%s' (partial parsing).", filename)
+			terragruntOptions.Logger.Debugf("Cache miss for '%s' (partial parsing), decodeList: '%v'.", filename, decodeList)
 			tgConfig, err := PartialParseConfigString(configString, terragruntOptions, includeFromChild, filename, decodeList)
 			if err != nil {
 				return nil, err
 			}
 			config = *tgConfig
 			terragruntConfigCache.Put(cacheKey, config)
 		} else {
-			terragruntOptions.Logger.Debugf("Cache hit for '%s' (partial parsing).", filename)
+			terragruntOptions.Logger.Debugf("Cache hit for '%s' (partial parsing), decodeList: '%v'.", filename, decodeList)
 		}
 
 		return &config, nil