Fix #671: `updatekeys` checks for config file flag (#672)

* update 'updatekeys' subcommand to use config (if exists) from commandline

* Fix #671: `updatekeys` checks for config file flag

The 'updatekeys' subcommand did not check for the config flag
in the command line. Add that check and if found use it to set configPath.

* Fix #671: `updatekeys` checks for config file flag

The 'updatekeys' subcommand did not check for the config global string flag.
 Add that check and if found use it to set configPath.

* Fix #671: `updatekeys` checks for config file flag

The 'updatekeys' subcommand did not check for the config global string flag.
Add that check and if found use it to set configPath.

 Edit: Remove mistake file addition

* Update cmd/sops/main.go

Co-authored-by: Adrian Utrilla <adrianutrilla@gmail.com>

cmd/sops/main.go

@@ -474,9 +474,15 @@ func main() {
 				},
 			}, keyserviceFlags...),
 			Action: func(c *cli.Context) error {
-				configPath, err := config.FindConfigFile(".")
-				if err != nil {
-					return common.NewExitError(err, codes.ErrorGeneric)
+				var err error
+				var configPath string
+				if c.GlobalString("config") != "" {
+					configPath = c.GlobalString("config")
+				} else {
+					configPath, err = config.FindConfigFile(".")
+					if err != nil {
+						return common.NewExitError(err, codes.ErrorGeneric)
+					}
 				}
 				if c.NArg() < 1 {
 					return common.NewExitError("Error: no file specified", codes.NoFileSpecified)