// 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 clap_complete::ArgValueCompleter;use jj_lib::backend::Signature;use jj_lib::object_id::ObjectId as _;use jj_lib::repo::Repo as _;use tracing::instrument; use crate::cli_util::CommandHelper;use crate::command_error::user_error;use crate::command_error::CommandError;use crate::complete;use crate::description_util::add_trailers;use crate::description_util::description_template;use crate::description_util::edit_description;use crate::description_util::join_message_paragraphs;use crate::text_util::parse_author;use crate::ui::Ui; /// Update the description and create a new change on top.#[derive(clap::Args, Clone, Debug)]pub(crate) struct CommitArgs {    /// Interactively choose which changes to include in the first commit    #[arg(short, long)]    interactive: bool,    /// Specify diff editor to be used (implies --interactive)    #[arg(long, value_name = "NAME")]    tool: Option<String>,    /// The change description to use (don't open editor)    #[arg(long = "message", short, value_name = "MESSAGE")]    message_paragraphs: Vec<String>,    /// Put these paths in the first commit    #[arg(        value_name = "FILESETS",         value_hint = clap::ValueHint::AnyPath,        add = ArgValueCompleter::new(complete::modified_files),    )]    paths: Vec<String>,    /// Reset the author to the configured user    ///    /// This resets the author name, email, and timestamp.    ///    /// You can use it in combination with the JJ_USER and JJ_EMAIL    /// environment variables to set a different author:    ///    /// $ JJ_USER='Foo Bar' JJ_EMAIL=foo@bar.com jj commit --reset-author    #[arg(long)]    reset_author: bool,    /// Set author to the provided string    ///    /// This changes author name and email while retaining author    /// timestamp for non-discardable commits.    #[arg(        long,        conflicts_with = "reset_author",        value_parser = parse_author    )]    author: Option<(String, String)>,} #[instrument(skip_all)]pub(crate) fn cmd_commit(    ui: &mut Ui,    command: &CommandHelper,    args: &CommitArgs,) -> Result<(), CommandError> {    let mut workspace_command = command.workspace_helper(ui)?;     let commit_id = workspace_command        .get_wc_commit_id()        .ok_or_else(|| user_error("This command requires a working copy"))?;    let commit = workspace_command.repo().store().get_commit(commit_id)?;    let matcher = workspace_command        .parse_file_patterns(ui, &args.paths)?        .to_matcher();    let advanceable_bookmarks = workspace_command.get_advanceable_bookmarks(commit.parent_ids())?;    let diff_selector =        workspace_command.diff_selector(ui, args.tool.as_deref(), args.interactive)?;    let text_editor = workspace_command.text_editor()?;    let mut tx = workspace_command.start_transaction();    let base_tree = commit.parent_tree(tx.repo())?;    let format_instructions = || {        format!(            "\You are splitting the working-copy commit: {} The diff initially shows all changes. Adjust the right side until it shows thecontents you want for the first commit. The remainder will be included in thenew working-copy commit.",            tx.format_commit_summary(&commit)        )    };    let tree_id = diff_selector.select(        &base_tree,        &commit.tree()?,        matcher.as_ref(),        format_instructions,    )?;    if !args.paths.is_empty() && tree_id == base_tree.id() {        writeln!(            ui.warning_default(),            "The given paths do not match any file: {}",            args.paths.join(" ")        )?;    }     let mut commit_builder = tx.repo_mut().rewrite_commit(&commit).detach();    commit_builder.set_tree_id(tree_id);    if args.reset_author {        commit_builder.set_author(commit_builder.committer().clone());    }    if let Some((name, email)) = args.author.clone() {        let new_author = Signature {            name,            email,            timestamp: commit_builder.author().timestamp,        };        commit_builder.set_author(new_author);    }     let description = if !args.message_paragraphs.is_empty() {        let mut description = join_message_paragraphs(&args.message_paragraphs);        if !description.is_empty() {            // The first trailer would become the first line of the description.            // Also, a commit with no description is treated in a special way in jujutsu: it            // can be discarded as soon as it's no longer the working copy. Adding a            // trailer to an empty description would break that logic.            commit_builder.set_description(description);            description = add_trailers(ui, &tx, &commit_builder)?;        }        description    } else {        let description = add_trailers(ui, &tx, &commit_builder)?;        commit_builder.set_description(description);        let temp_commit = commit_builder.write_hidden()?;        let description = description_template(ui, &tx, "", &temp_commit)?;        edit_description(&text_editor, &description)?    };    commit_builder.set_description(description);    let new_commit = commit_builder.write(tx.repo_mut())?;     let workspace_names = tx.repo().view().workspaces_for_wc_commit_id(commit.id());    if !workspace_names.is_empty() {        let new_wc_commit = tx            .repo_mut()            .new_commit(vec![new_commit.id().clone()], commit.tree_id().clone())            .write()?;         // Does nothing if there's no bookmarks to advance.        tx.advance_bookmarks(advanceable_bookmarks, new_commit.id());         for name in workspace_names {            tx.repo_mut().edit(name, &new_wc_commit).unwrap();        }    }    tx.finish(ui, format!("commit {}", commit.id().hex()))?;    Ok(())}