// 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::matchers::EverythingMatcher;use tracing::instrument; use crate::cli_util::{CommandHelper, RevisionArg};use crate::command_error::CommandError;use crate::diff_util::{self, DiffFormatArgs};use crate::ui::Ui; /// Show commit description and changes in a revision#[derive(clap::Args, Clone, Debug)]pub(crate) struct ShowArgs {    /// Show changes in this revision, compared to its parent(s)    #[arg(default_value = "@")]    revision: RevisionArg,    /// Ignored (but lets you pass `-r` for consistency with other commands)    #[arg(short = 'r', hide = true)]    unused_revision: bool,    /// Render a revision using the given template    ///    /// For the syntax, see https://github.com/martinvonz/jj/blob/main/docs/templates.md    #[arg(long, short = 'T')]    template: Option<String>,    #[command(flatten)]    format: DiffFormatArgs,} #[instrument(skip_all)]pub(crate) fn cmd_show(    ui: &mut Ui,    command: &CommandHelper,    args: &ShowArgs,) -> Result<(), CommandError> {    let workspace_command = command.workspace_helper(ui)?;    let commit = workspace_command.resolve_single_rev(&args.revision)?;    let template_string = match &args.template {        Some(value) => value.to_string(),        None => command.settings().config().get_string("templates.show")?,    };    let template = workspace_command.parse_commit_template(&template_string)?;    let diff_formats = diff_util::diff_formats_for(command.settings(), &args.format)?;    ui.request_pager();    let mut formatter = ui.stdout_formatter();    let formatter = formatter.as_mut();    template.format(&commit, formatter)?;    diff_util::show_patch(        ui,        formatter,        &workspace_command,        &commit,        &EverythingMatcher,        &diff_formats,    )?;    Ok(())}