// Copyright 2024 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::fmt::Debug;use std::io::Write as _; use futures::StreamExt as _;use jj_lib::backend::CopyRecord;use jj_lib::repo::Repo as _; use crate::cli_util::CommandHelper;use crate::cli_util::RevisionArg;use crate::command_error::CommandError;use crate::ui::Ui; /// Show information about file copies detected#[derive(clap::Args, Clone, Debug)]pub struct CopyDetectionArgs {    /// Show file copies detected in changed files in this revision, compared to    /// its parent(s)    #[arg(default_value = "@", value_name = "REVSET")]    revision: RevisionArg,} pub async fn cmd_debug_copy_detection(    ui: &mut Ui,    command: &CommandHelper,    args: &CopyDetectionArgs,) -> Result<(), CommandError> {    let ws = command.workspace_helper(ui).await?;    let store = ws.repo().store();     let commit = ws.resolve_single_rev(ui, &args.revision).await?;    for parent_id in commit.parent_ids() {        let mut records = store.get_copy_records(None, parent_id, commit.id())?;        while let Some(result) = records.next().await {            if let Ok(CopyRecord { target, source, .. }) = result {                writeln!(                    ui.stdout(),                    "{} -> {}",                    source.as_internal_file_string(),                    target.as_internal_file_string()                )?;            }        }    }    Ok(())}