chore(lockfile) change flag to --lockfile

This is more consistent with the `lockfile` config option

internal/flags/flags.go

@@ -1,10 +1,10 @@
 package flags
 
 var (
-	CI            bool = false
-	VERBOSE       bool = false
-	CRON_LEAN     bool = false
-	RESTIC_BIN    string
-	DOCKER_IMAGE  string
-	LOCKFILE_PATH string
+	CI           bool = false
+	VERBOSE      bool = false
+	CRON_LEAN    bool = false
+	RESTIC_BIN   string
+	DOCKER_IMAGE string
+	LOCKFILE     string
 )

internal/lock.go

@@ -20,14 +20,14 @@ const (
 )
 
 // getLockfilePath returns the path to the lockfile. The path for the lockfile
-// can be sources from multiple places If flags.LOCKFILE_PATH is set, its value
-// is used; if the config has the `lockfile` option set, its value is used;
+// can be sources from multiple places If flags.LOCKFILE is set, its value is
+// used; if the config has the `lockfile` option set, its value is used;
 // otherwise the path is generated relative to the config file.
 func getLockfilePath() string {
-	if flags.LOCKFILE_PATH != "" {
-		abs, err := filepath.Abs(flags.LOCKFILE_PATH)
+	if flags.LOCKFILE != "" {
+		abs, err := filepath.Abs(flags.LOCKFILE)
 		if err != nil {
-			return flags.LOCKFILE_PATH
+			return flags.LOCKFILE
 		}
 		return abs
 	}

internal/lock_test.go

@@ -17,7 +17,7 @@ import (
 func setup(t *testing.T) {
 	t.Helper()
 	cleanup := func() {
-		flags.LOCKFILE_PATH = ""
+		flags.LOCKFILE = ""
 		config = nil
 		once = sync.Once{}
 		viper.Reset()
@@ -62,7 +62,7 @@ func TestGetLockfilePath(t *testing.T) {
 		for _, testCase := range testCases {
 			t.Run(testCase.name, func(t *testing.T) {
 				setup(t)
-				flags.LOCKFILE_PATH = testCase.flag
+				flags.LOCKFILE = testCase.flag
 				if testCase.config != "" {
 					viper.Set("lockfile", testCase.config)
 					err := viper.WriteConfig()