support nuking all submodules

pkg/commands/git.go

@@ -375,6 +375,23 @@ func includesInt(list []int, a int) bool {
 
 // ResetAndClean removes all unstaged changes and removes all untracked files
 func (c *GitCommand) ResetAndClean() error {
+	submoduleConfigs, err := c.GetSubmoduleConfigs()
+	if err != nil {
+		return err
+	}
+
+	if len(submoduleConfigs) > 0 {
+		for _, config := range submoduleConfigs {
+			if err := c.SubmoduleStash(config); err != nil {
+				return err
+			}
+		}
+
+		if err := c.SubmoduleUpdateAll(); err != nil {
+			return err
+		}
+	}
+
 	if err := c.ResetHard("HEAD"); err != nil {
 		return err
 	}

pkg/commands/submodules.go

@@ -58,9 +58,20 @@ func (c *GitCommand) GetSubmoduleConfigs() ([]*SubmoduleConfig, error) {
 }
 
 func (c *GitCommand) SubmoduleStash(config *SubmoduleConfig) error {
+	// if the path does not exist then it hasn't yet been initialized so we'll swallow the error
+	// because the intention here is to have no dirty worktree state
+	if _, err := os.Stat(config.Path); os.IsNotExist(err) {
+		c.Log.Infof("submodule path %s does not exist, returning", config.Path)
+		return nil
+	}
+
 	return c.OSCommand.RunCommand("git -C %s stash --include-untracked", config.Path)
 }
 
 func (c *GitCommand) SubmoduleReset(config *SubmoduleConfig) error {
 	return c.OSCommand.RunCommand("git submodule update --force %s", config.Name)
 }
+
+func (c *GitCommand) SubmoduleUpdateAll() error {
+	return c.OSCommand.RunCommand("git submodule update --force")
+}