// 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 std::io::Write as _; use clap_complete::ArgValueCandidates;use jj_lib::object_id::ObjectId as _;use tracing::instrument; use crate::cli_util::CommandHelper;use crate::cli_util::RevisionArg;use crate::command_error::CommandError;use crate::complete;use crate::ui::Ui; /// Sets the specified revision as the working-copy revision////// Note: it is [generally recommended] to instead use `jj new` and `jj/// squash`.////// [generally recommended]:///     https://jj-vcs.github.io/jj/latest/FAQ#how-do-i-resume-working-on-an-existing-change#[derive(clap::Args, Clone, Debug)]pub(crate) struct EditArgs {    /// The commit to edit    #[arg(value_name = "REVSET", add = ArgValueCandidates::new(complete::mutable_revisions))]    revision: RevisionArg,    /// Ignored (but lets you pass `-r` for consistency with other commands)    #[arg(short = 'r', hide = true)]    unused_revision: bool,} #[instrument(skip_all)]pub(crate) fn cmd_edit(    ui: &mut Ui,    command: &CommandHelper,    args: &EditArgs,) -> Result<(), CommandError> {    let mut workspace_command = command.workspace_helper(ui)?;    let new_commit = workspace_command.resolve_single_rev(ui, &args.revision)?;    workspace_command.check_rewritable([new_commit.id()])?;    if workspace_command.get_wc_commit_id() == Some(new_commit.id()) {        writeln!(ui.status(), "Already editing that commit")?;    } else {        let mut tx = workspace_command.start_transaction();        tx.edit(&new_commit)?;        tx.finish(ui, format!("edit commit {}", new_commit.id().hex()))?;    }    Ok(())}