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commands: add a command for splitting a commit in two

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Unlike Mercurial's version of the command, it can currently only
create exactly two parts.
This commit is contained in:
Martin von Zweigbergk 2020-12-26 11:14:44 -08:00
parent c04aa43232
commit 67d496a668
1 changed files with 52 additions and 0 deletions
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52
src/commands.rs
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@ -416,6 +416,11 @@ fn get_app<'a, 'b>() -> App<'a, 'b> {
.about("edit the content changes in a revision")
.arg(rev_arg()),
)
.subcommand(
SubCommand::with_name("split")
.about("split a revision in two")
.arg(rev_arg()),
)
.subcommand(
SubCommand::with_name("merge")
.about("merge work from multiple branches")
@ -1417,6 +1422,51 @@ fn cmd_edit(
Ok(())
}
fn cmd_split(
ui: &mut Ui,
matches: &ArgMatches,
sub_matches: &ArgMatches,
) -> Result<(), CommandError> {
let mut repo = get_repo(ui, &matches)?;
let owned_wc = repo.working_copy().clone();
let mut_repo = Arc::get_mut(&mut repo).unwrap();
let commit = resolve_revision_arg(ui, mut_repo, sub_matches)?;
let base_tree = merge_commit_trees(repo.store(), &commit.parents());
let tree_id = crate::diff_edit::edit_diff(&base_tree, &commit.tree())?;
if &tree_id == commit.tree().id() {
ui.write("Nothing changed.\n");
} else {
let mut tx = repo.start_transaction(&format!("split commit {}", commit.id().hex()));
// TODO: Add a header or footer to the decription where we describe to the user
// that this is the first commit
let first_description = edit_description(&repo, commit.description());
let first_commit = CommitBuilder::for_rewrite_from(ui.settings(), repo.store(), &commit)
.set_tree(tree_id)
.set_description(first_description)
.write_to_transaction(&mut tx);
let second_description = edit_description(&repo, commit.description());
let second_commit = CommitBuilder::for_rewrite_from(ui.settings(), repo.store(), &commit)
.set_parents(vec![first_commit.id().clone()])
.set_tree(commit.tree().id().clone())
.generate_new_change_id()
.set_description(second_description)
.write_to_transaction(&mut tx);
ui.write("First part: ");
ui.write_commit_summary(tx.as_repo(), &first_commit);
ui.write("Second part: ");
ui.write_commit_summary(tx.as_repo(), &second_commit);
ui.write("\n");
update_checkout_after_rewrite(ui, &mut tx);
tx.commit();
update_working_copy(
ui,
Arc::get_mut(&mut repo).unwrap(),
&owned_wc.lock().unwrap(),
)?;
}
Ok(())
}
fn cmd_merge(
ui: &mut Ui,
matches: &ArgMatches,
@ -1931,6 +1981,8 @@ where
cmd_restore(&mut ui, &matches, &sub_matches)
} else if let Some(sub_matches) = matches.subcommand_matches("edit") {
cmd_edit(&mut ui, &matches, &sub_matches)
} else if let Some(sub_matches) = matches.subcommand_matches("split") {
cmd_split(&mut ui, &matches, &sub_matches)
} else if let Some(sub_matches) = matches.subcommand_matches("merge") {
cmd_merge(&mut ui, &matches, &sub_matches)
} else if let Some(sub_matches) = matches.subcommand_matches("rebase") {