mirror of
https://github.com/martinvonz/jj.git
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044f23bc33
I've finally decided to copy Git's branching model (issue #21), except that I'm letting the name identify the branch across remotes. Actually, now that I think about, that makes them more like Mercurial's "bookmarks". Each branch will record the commit it points to locally, as well as the commits it points to on each remote (as far as the repo knows, of course). Those records are effectively the same thing as Git's "remote-tracking branches"; the difference is that we consider them the same branch. Consequently, when you pull a new branch from a remote, we'll create that branch locally. For example, if you pull branch "main" from a remote called "origin", that will result in a local branch called "main", and also a record of the position on the remote, which we'll show as "main@origin" in the CLI (not part of this commit). If you then update the branch locally and also pull a new target for it from "origin", the local "main" branch will be divergent. I plan to make it so that pushing "main" will update the remote's "main" iff it was currently at "main@origin" (i.e. like using Git's `git push --force-with-lease`). This commit adds a place to store information about branches in the view model. The existing git_refs field will be used as input for the branch information. For example, we can use it to tell if "refs/heads/main" has changed and how it has changed. We will then use that ref diff to update our own record of the "main" branch. That will come later. In order to let git_refs take a back seat, I've also added tags (like Git's lightweight tags) to the model in this commit. I haven't ruled out *also* having some more persistent type of branches (like Mercurials branches or topics).
376 lines
14 KiB
Rust
376 lines
14 KiB
Rust
// Copyright 2020 Google LLC
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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 jujutsu_lib::op_store::{BranchTarget, RefTarget};
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use jujutsu_lib::testutils;
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use jujutsu_lib::testutils::CommitGraphBuilder;
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use maplit::{btreemap, hashset};
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use test_case::test_case;
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#[test_case(false ; "local store")]
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#[test_case(true ; "git store")]
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fn test_heads_empty(use_git: bool) {
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let settings = testutils::user_settings();
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let (_temp_dir, repo) = testutils::init_repo(&settings, use_git);
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let wc = repo.working_copy_locked();
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assert_eq!(*repo.view().heads(), hashset! {wc.current_commit_id()});
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assert_eq!(
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*repo.view().public_heads(),
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hashset! {repo.store().root_commit_id().clone()}
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);
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}
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#[test_case(false ; "local store")]
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#[test_case(true ; "git store")]
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fn test_heads_fork(use_git: bool) {
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let settings = testutils::user_settings();
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let (_temp_dir, repo) = testutils::init_repo(&settings, use_git);
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let mut tx = repo.start_transaction("test");
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let mut graph_builder = CommitGraphBuilder::new(&settings, tx.mut_repo());
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let initial = graph_builder.initial_commit();
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let child1 = graph_builder.commit_with_parents(&[&initial]);
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let child2 = graph_builder.commit_with_parents(&[&initial]);
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let repo = tx.commit();
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let wc = repo.working_copy_locked();
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assert_eq!(
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*repo.view().heads(),
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hashset! {
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wc.current_commit_id(),
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child1.id().clone(),
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child2.id().clone(),
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}
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);
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}
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#[test_case(false ; "local store")]
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#[test_case(true ; "git store")]
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fn test_heads_merge(use_git: bool) {
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let settings = testutils::user_settings();
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let (_temp_dir, repo) = testutils::init_repo(&settings, use_git);
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let mut tx = repo.start_transaction("test");
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let mut graph_builder = CommitGraphBuilder::new(&settings, tx.mut_repo());
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let initial = graph_builder.initial_commit();
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let child1 = graph_builder.commit_with_parents(&[&initial]);
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let child2 = graph_builder.commit_with_parents(&[&initial]);
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let merge = graph_builder.commit_with_parents(&[&child1, &child2]);
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let repo = tx.commit();
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let wc = repo.working_copy_locked();
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assert_eq!(
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*repo.view().heads(),
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hashset! {wc.current_commit_id(), merge.id().clone()}
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);
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}
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#[test]
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fn test_merge_views_heads() {
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// Tests merging of the view's heads (by performing concurrent operations).
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let settings = testutils::user_settings();
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let (_temp_dir, repo) = testutils::init_repo(&settings, false);
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let mut tx = repo.start_transaction("test");
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let mut_repo = tx.mut_repo();
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let head_unchanged = testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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let head_remove_tx1 = testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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let head_remove_tx2 = testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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let public_head_unchanged =
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testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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mut_repo.add_public_head(&public_head_unchanged);
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let public_head_remove_tx1 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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mut_repo.add_public_head(&public_head_remove_tx1);
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let public_head_remove_tx2 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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mut_repo.add_public_head(&public_head_remove_tx2);
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let repo = tx.commit();
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let mut tx1 = repo.start_transaction("test");
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tx1.mut_repo().remove_head(&head_remove_tx1);
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tx1.mut_repo().remove_public_head(&public_head_remove_tx1);
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let head_add_tx1 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(tx1.mut_repo());
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let public_head_add_tx1 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(tx1.mut_repo());
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tx1.mut_repo().add_public_head(&public_head_add_tx1);
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tx1.commit();
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let mut tx2 = repo.start_transaction("test");
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tx2.mut_repo().remove_head(&head_remove_tx2);
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tx2.mut_repo().remove_public_head(&public_head_remove_tx2);
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let head_add_tx2 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(tx2.mut_repo());
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let public_head_add_tx2 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(tx2.mut_repo());
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tx2.mut_repo().add_public_head(&public_head_add_tx2);
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tx2.commit();
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let repo = repo.reload();
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let expected_heads = hashset! {
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repo.view().checkout().clone(),
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head_unchanged.id().clone(),
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head_add_tx1.id().clone(),
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head_add_tx2.id().clone(),
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public_head_unchanged.id().clone(),
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public_head_remove_tx1.id().clone(),
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public_head_remove_tx2.id().clone(),
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public_head_add_tx1.id().clone(),
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public_head_add_tx2.id().clone(),
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};
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assert_eq!(repo.view().heads(), &expected_heads);
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let expected_public_heads = hashset! {
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public_head_unchanged.id().clone(),
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public_head_add_tx1.id().clone(),
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public_head_add_tx2.id().clone(),
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};
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assert_eq!(repo.view().public_heads(), &expected_public_heads);
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}
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#[test]
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fn test_merge_views_checkout() {
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// Tests merging of the view's checkout (by performing concurrent operations).
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let settings = testutils::user_settings();
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let (_temp_dir, repo) = testutils::init_repo(&settings, false);
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let mut tx1 = repo.start_transaction("test");
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let checkout_tx1 = testutils::create_random_commit(&settings, &repo)
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.set_open(false)
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.write_to_repo(tx1.mut_repo());
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tx1.mut_repo().set_checkout(checkout_tx1.id().clone());
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tx1.commit();
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let mut tx2 = repo.start_transaction("test");
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let checkout_tx2 = testutils::create_random_commit(&settings, &repo)
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.set_open(false)
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.write_to_repo(tx2.mut_repo());
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tx2.mut_repo().set_checkout(checkout_tx2.id().clone());
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tx2.commit();
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let repo = repo.reload();
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// We currently arbitrarily pick the first transaction's checkout (first by
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// transaction end time).
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assert_eq!(repo.view().checkout(), checkout_tx1.id());
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}
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#[test]
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fn test_merge_views_branches() {
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// Tests merging of branches (by performing concurrent operations). See
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// test_refs.rs for tests of merging of individual ref targets.
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let settings = testutils::user_settings();
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let (_temp_dir, repo) = testutils::init_repo(&settings, false);
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let mut tx = repo.start_transaction("test");
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let mut_repo = tx.mut_repo();
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let main_branch_local_tx0 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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let main_branch_origin_tx0 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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let main_branch_alternate_tx0 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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mut_repo.set_local_branch(
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"main".to_string(),
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RefTarget::Normal(main_branch_local_tx0.id().clone()),
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);
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mut_repo.set_remote_branch(
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"main".to_string(),
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"origin".to_string(),
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RefTarget::Normal(main_branch_origin_tx0.id().clone()),
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);
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mut_repo.set_remote_branch(
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"main".to_string(),
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"alternate".to_string(),
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RefTarget::Normal(main_branch_alternate_tx0.id().clone()),
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);
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let feature_branch_local_tx0 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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mut_repo.set_git_ref(
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"feature".to_string(),
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RefTarget::Normal(feature_branch_local_tx0.id().clone()),
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);
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let repo = tx.commit();
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let mut tx1 = repo.start_transaction("test");
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let main_branch_local_tx1 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(tx1.mut_repo());
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let main_branch_origin_tx1 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(tx1.mut_repo());
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tx1.mut_repo().set_local_branch(
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"main".to_string(),
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RefTarget::Normal(main_branch_local_tx1.id().clone()),
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);
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tx1.mut_repo().set_remote_branch(
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"main".to_string(),
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"origin".to_string(),
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RefTarget::Normal(main_branch_origin_tx1.id().clone()),
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);
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let feature_branch_tx1 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(tx1.mut_repo());
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tx1.mut_repo().set_local_branch(
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"feature".to_string(),
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RefTarget::Normal(feature_branch_tx1.id().clone()),
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);
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tx1.commit();
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let mut tx2 = repo.start_transaction("test");
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let main_branch_local_tx2 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(tx2.mut_repo());
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tx2.mut_repo().set_local_branch(
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"main".to_string(),
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RefTarget::Normal(main_branch_local_tx2.id().clone()),
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);
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tx2.mut_repo().set_remote_branch(
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"main".to_string(),
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"origin".to_string(),
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RefTarget::Normal(main_branch_origin_tx1.id().clone()),
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);
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tx2.commit();
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let repo = repo.reload();
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let expected_main_branch = BranchTarget {
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local_target: Some(RefTarget::Conflict {
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removes: vec![main_branch_local_tx0.id().clone()],
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adds: vec![
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main_branch_local_tx1.id().clone(),
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main_branch_local_tx2.id().clone(),
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],
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}),
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remote_targets: btreemap! {
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"origin".to_string() => RefTarget::Normal(main_branch_origin_tx1.id().clone()),
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"alternate".to_string() => RefTarget::Normal(main_branch_alternate_tx0.id().clone()),
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},
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};
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let expected_feature_branch = BranchTarget {
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local_target: Some(RefTarget::Normal(feature_branch_tx1.id().clone())),
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remote_targets: btreemap! {},
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};
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assert_eq!(
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repo.view().branches(),
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&btreemap! {
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"main".to_string() => expected_main_branch,
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"feature".to_string() => expected_feature_branch,
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}
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);
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}
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#[test]
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fn test_merge_views_tags() {
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// Tests merging of tags (by performing concurrent operations). See
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// test_refs.rs for tests of merging of individual ref targets.
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let settings = testutils::user_settings();
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let (_temp_dir, repo) = testutils::init_repo(&settings, false);
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let mut tx = repo.start_transaction("test");
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let mut_repo = tx.mut_repo();
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let v1_tx0 = testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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mut_repo.set_tag("v1.0".to_string(), RefTarget::Normal(v1_tx0.id().clone()));
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let v2_tx0 = testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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mut_repo.set_tag("v2.0".to_string(), RefTarget::Normal(v2_tx0.id().clone()));
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let repo = tx.commit();
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let mut tx1 = repo.start_transaction("test");
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let v1_tx1 = testutils::create_random_commit(&settings, &repo).write_to_repo(tx1.mut_repo());
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tx1.mut_repo()
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.set_tag("v1.0".to_string(), RefTarget::Normal(v1_tx1.id().clone()));
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let v2_tx1 = testutils::create_random_commit(&settings, &repo).write_to_repo(tx1.mut_repo());
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tx1.mut_repo()
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.set_tag("v2.0".to_string(), RefTarget::Normal(v2_tx1.id().clone()));
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tx1.commit();
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let mut tx2 = repo.start_transaction("test");
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let v1_tx2 = testutils::create_random_commit(&settings, &repo).write_to_repo(tx2.mut_repo());
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tx2.mut_repo()
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.set_tag("v1.0".to_string(), RefTarget::Normal(v1_tx2.id().clone()));
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tx2.commit();
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let repo = repo.reload();
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let expected_v1 = RefTarget::Conflict {
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removes: vec![v1_tx0.id().clone()],
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adds: vec![v1_tx1.id().clone(), v1_tx2.id().clone()],
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};
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let expected_v2 = RefTarget::Normal(v2_tx1.id().clone());
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assert_eq!(
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repo.view().tags(),
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&btreemap! {
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"v1.0".to_string() => expected_v1,
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"v2.0".to_string() => expected_v2,
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}
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);
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}
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#[test]
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fn test_merge_views_git_refs() {
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// Tests merging of git refs (by performing concurrent operations). See
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// test_refs.rs for tests of merging of individual ref targets.
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let settings = testutils::user_settings();
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let (_temp_dir, repo) = testutils::init_repo(&settings, false);
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let mut tx = repo.start_transaction("test");
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let mut_repo = tx.mut_repo();
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let main_branch_tx0 = testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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mut_repo.set_git_ref(
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"refs/heads/main".to_string(),
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RefTarget::Normal(main_branch_tx0.id().clone()),
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);
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let feature_branch_tx0 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(mut_repo);
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mut_repo.set_git_ref(
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"refs/heads/feature".to_string(),
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RefTarget::Normal(feature_branch_tx0.id().clone()),
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);
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let repo = tx.commit();
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let mut tx1 = repo.start_transaction("test");
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let main_branch_tx1 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(tx1.mut_repo());
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tx1.mut_repo().set_git_ref(
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"refs/heads/main".to_string(),
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RefTarget::Normal(main_branch_tx1.id().clone()),
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);
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let feature_branch_tx1 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(tx1.mut_repo());
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tx1.mut_repo().set_git_ref(
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"refs/heads/feature".to_string(),
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RefTarget::Normal(feature_branch_tx1.id().clone()),
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);
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tx1.commit();
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let mut tx2 = repo.start_transaction("test");
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let main_branch_tx2 =
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testutils::create_random_commit(&settings, &repo).write_to_repo(tx2.mut_repo());
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tx2.mut_repo().set_git_ref(
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"refs/heads/main".to_string(),
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RefTarget::Normal(main_branch_tx2.id().clone()),
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);
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tx2.commit();
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let repo = repo.reload();
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let expected_main_branch = RefTarget::Conflict {
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removes: vec![main_branch_tx0.id().clone()],
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adds: vec![main_branch_tx1.id().clone(), main_branch_tx2.id().clone()],
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};
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let expected_feature_branch = RefTarget::Normal(feature_branch_tx1.id().clone());
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assert_eq!(
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repo.view().git_refs(),
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&btreemap! {
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"refs/heads/main".to_string() => expected_main_branch,
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"refs/heads/feature".to_string() => expected_feature_branch,
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}
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);
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}
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