// Copyright 2020 The Jujutsu Authors//// Licensed under the Apache License, Version 2.0 (the "License");// you may not use this file except in compliance with the License.// You may obtain a copy of the License at//// https://www.apache.org/licenses/LICENSE-2.0//// Unless required by applicable law or agreed to in writing, software// distributed under the License is distributed on an "AS IS" BASIS,// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.// See the License for the specific language governing permissions and// limitations under the License. use jj_lib::ref_name::WorkspaceNameBuf;use tracing::instrument; use crate::cli_util::CommandHelper;use crate::command_error::CommandError;use crate::command_error::user_error;use crate::ui::Ui; /// Renames the current workspace#[derive(clap::Args, Clone, Debug)]pub struct WorkspaceRenameArgs {    /// The name of the workspace to update to.    new_workspace_name: WorkspaceNameBuf,} #[instrument(skip_all)]pub fn cmd_workspace_rename(    ui: &mut Ui,    command: &CommandHelper,    args: &WorkspaceRenameArgs,) -> Result<(), CommandError> {    if args.new_workspace_name.as_str().is_empty() {        return Err(user_error("New workspace name cannot be empty"));    }     let mut workspace_command = command.workspace_helper(ui)?;     let old_name = workspace_command.working_copy().workspace_name().to_owned();    let new_name = &*args.new_workspace_name;    if new_name == old_name {        writeln!(ui.status(), "Nothing changed.")?;        return Ok(());    }     if workspace_command        .repo()        .view()        .get_wc_commit_id(&old_name)        .is_none()    {        return Err(user_error(format!(            "The current workspace '{}' is not tracked in the repo.",            old_name.as_symbol()        )));    }     let mut tx = workspace_command.start_transaction().into_inner();    let (mut locked_ws, _wc_commit) = workspace_command.start_working_copy_mutation()?;     locked_ws.locked_wc().rename_workspace(new_name.to_owned());     tx.repo_mut()        .rename_workspace(&old_name, new_name.to_owned())?;    let repo = tx.commit(format!(        "Renamed workspace '{old}' to '{new}'",        old = old_name.as_symbol(),        new = new_name.as_symbol()    ))?;    locked_ws.finish(repo.op_id().clone())?;     Ok(())}