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https://github.com/martinvonz/jj.git
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4e3c772428
There's a subtle behavior change that an empty revset is no longer rejected individually, but I think that's good for "jj duplicate". cmd_duplicate() was the last caller of index.topo_order().
100 lines
3.5 KiB
Rust
100 lines
3.5 KiB
Rust
// Copyright 2020 The Jujutsu Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use std::io::Write;
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use indexmap::IndexMap;
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use jj_lib::backend::CommitId;
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use jj_lib::commit::Commit;
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use jj_lib::repo::Repo;
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use tracing::instrument;
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use crate::cli_util::{short_commit_hash, CommandHelper, RevisionArg};
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use crate::command_error::{user_error, CommandError};
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use crate::ui::Ui;
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/// Create a new change with the same content as an existing one
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#[derive(clap::Args, Clone, Debug)]
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pub(crate) struct DuplicateArgs {
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/// The revision(s) to duplicate
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#[arg(default_value = "@")]
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revisions: Vec<RevisionArg>,
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/// Ignored (but lets you pass `-r` for consistency with other commands)
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#[arg(short = 'r', hide = true)]
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unused_revision: bool,
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}
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#[instrument(skip_all)]
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pub(crate) fn cmd_duplicate(
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ui: &mut Ui,
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command: &CommandHelper,
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args: &DuplicateArgs,
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) -> Result<(), CommandError> {
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let mut workspace_command = command.workspace_helper(ui)?;
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let to_duplicate: Vec<CommitId> = {
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let expression = workspace_command.parse_union_revsets(&args.revisions)?;
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let revset = workspace_command.evaluate_revset(expression)?;
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revset.iter().collect() // in reverse topological order
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};
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if to_duplicate.is_empty() {
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return Err(user_error("No revisions to duplicate"));
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}
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if to_duplicate.last() == Some(workspace_command.repo().store().root_commit_id()) {
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return Err(user_error("Cannot duplicate the root commit"));
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}
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let mut duplicated_old_to_new: IndexMap<Commit, Commit> = IndexMap::new();
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let mut tx = workspace_command.start_transaction();
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let base_repo = tx.base_repo().clone();
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let store = base_repo.store();
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let mut_repo = tx.mut_repo();
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for original_commit_id in to_duplicate.iter().rev() {
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// Topological order ensures that any parents of `original_commit` are
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// either not in `to_duplicate` or were already duplicated.
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let original_commit = store.get_commit(original_commit_id).unwrap();
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let new_parents = original_commit
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.parents()
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.iter()
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.map(|parent| {
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if let Some(duplicated_parent) = duplicated_old_to_new.get(parent) {
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duplicated_parent
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} else {
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parent
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}
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.id()
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.clone()
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})
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.collect();
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let new_commit = mut_repo
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.rewrite_commit(command.settings(), &original_commit)
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.generate_new_change_id()
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.set_parents(new_parents)
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.write()?;
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duplicated_old_to_new.insert(original_commit, new_commit);
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}
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for (old, new) in duplicated_old_to_new.iter() {
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write!(
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ui.stderr(),
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"Duplicated {} as ",
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short_commit_hash(old.id())
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)?;
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tx.write_commit_summary(ui.stderr_formatter().as_mut(), new)?;
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writeln!(ui.stderr())?;
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}
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tx.finish(ui, format!("duplicating {} commit(s)", to_duplicate.len()))?;
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Ok(())
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}
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