mirror of
https://github.com/martinvonz/jj.git
synced 2024-09-22 03:07:11 +03:00
f6a4cb57da
This will soon replace the `RepoRef` enum, just like how the `Index` trait replaced the `IndexRef` enum.
650 lines
23 KiB
Rust
650 lines
23 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 assert_matches::assert_matches;
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use itertools::Itertools;
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use jujutsu_lib::backend::{ConflictPart, TreeValue};
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use jujutsu_lib::repo::Repo;
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use jujutsu_lib::repo_path::{RepoPath, RepoPathComponent};
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use jujutsu_lib::rewrite::rebase_commit;
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use jujutsu_lib::tree;
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use jujutsu_lib::tree::Tree;
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use test_case::test_case;
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use testutils::TestRepo;
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#[test_case(false ; "local backend")]
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#[test_case(true ; "git backend")]
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fn test_same_type(use_git: bool) {
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// Tests all possible cases where the entry type is unchanged, specifically
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// using only normal files in all trees (no symlinks, no trees, etc.).
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let test_repo = TestRepo::init(use_git);
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let repo = &test_repo.repo;
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let store = repo.store();
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// The file name encodes the state in the base and in each side ("_" means
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// missing)
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let files = vec![
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"__a", // side 2 added
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"_a_", // side 1 added
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"_aa", // both sides added, same content
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"_ab", // both sides added, different content
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"a__", // both sides removed
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"a_a", // side 1 removed
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"a_b", // side 1 removed, side 2 modified
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"aa_", // side 2 removed
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"aaa", // no changes
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"aab", // side 2 modified
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"ab_", // side 1 modified, side 2 removed
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"aba", // side 1 modified
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"abb", // both sides modified, same content
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"abc", // both sides modified, different content
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];
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let write_tree = |index: usize| -> Tree {
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let mut tree_builder = store.tree_builder(store.empty_tree_id().clone());
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for path in &files {
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let contents = &path[index..index + 1];
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if contents != "_" {
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testutils::write_normal_file(
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&mut tree_builder,
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&RepoPath::from_internal_string(path),
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contents,
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);
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}
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}
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let tree_id = tree_builder.write_tree();
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store.get_tree(&RepoPath::root(), &tree_id).unwrap()
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};
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let base_tree = write_tree(0);
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let side1_tree = write_tree(1);
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let side2_tree = write_tree(2);
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// Create the merged tree
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let merged_tree_id = tree::merge_trees(&side1_tree, &base_tree, &side2_tree).unwrap();
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let merged_tree = store.get_tree(&RepoPath::root(), &merged_tree_id).unwrap();
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// Check that we have exactly the paths we expect in the merged tree
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let names = merged_tree
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.entries_non_recursive()
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.map(|entry| entry.name().as_str())
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.collect_vec();
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assert_eq!(
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names,
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vec!["__a", "_a_", "_aa", "_ab", "a_b", "aaa", "aab", "ab_", "aba", "abb", "abc",]
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);
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// Check that the simple, non-conflicting cases were resolved correctly
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assert_eq!(
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merged_tree.value(&RepoPathComponent::from("__a")),
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side2_tree.value(&RepoPathComponent::from("__a"))
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);
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assert_eq!(
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merged_tree.value(&RepoPathComponent::from("_a_")),
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side1_tree.value(&RepoPathComponent::from("_a_"))
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);
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assert_eq!(
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merged_tree.value(&RepoPathComponent::from("_aa")),
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side1_tree.value(&RepoPathComponent::from("_aa"))
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);
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assert_eq!(
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merged_tree.value(&RepoPathComponent::from("aaa")),
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side1_tree.value(&RepoPathComponent::from("aaa"))
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);
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assert_eq!(
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merged_tree.value(&RepoPathComponent::from("aab")),
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side2_tree.value(&RepoPathComponent::from("aab"))
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);
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assert_eq!(
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merged_tree.value(&RepoPathComponent::from("aba")),
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side1_tree.value(&RepoPathComponent::from("aba"))
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);
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assert_eq!(
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merged_tree.value(&RepoPathComponent::from("abb")),
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side1_tree.value(&RepoPathComponent::from("abb"))
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);
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// Check the conflicting cases
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let component = RepoPathComponent::from("_ab");
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match merged_tree.value(&component).unwrap() {
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TreeValue::Conflict(id) => {
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let conflict = store
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.read_conflict(&RepoPath::from_internal_string("_ab"), id)
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.unwrap();
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assert_eq!(
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conflict.adds,
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vec![
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ConflictPart {
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value: side1_tree.value(&component).cloned().unwrap()
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},
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ConflictPart {
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value: side2_tree.value(&component).cloned().unwrap()
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}
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]
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);
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assert!(conflict.removes.is_empty());
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}
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_ => panic!("unexpected value"),
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};
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let component = RepoPathComponent::from("a_b");
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match merged_tree.value(&component).unwrap() {
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TreeValue::Conflict(id) => {
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let conflict = store
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.read_conflict(&RepoPath::from_internal_string("a_b"), id)
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.unwrap();
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assert_eq!(
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conflict.removes,
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vec![ConflictPart {
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value: base_tree.value(&component).cloned().unwrap()
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}]
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);
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assert_eq!(
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conflict.adds,
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vec![ConflictPart {
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value: side2_tree.value(&component).cloned().unwrap()
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}]
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);
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}
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_ => panic!("unexpected value"),
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};
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let component = RepoPathComponent::from("ab_");
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match merged_tree.value(&component).unwrap() {
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TreeValue::Conflict(id) => {
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let conflict = store
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.read_conflict(&RepoPath::from_internal_string("ab_"), id)
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.unwrap();
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assert_eq!(
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conflict.removes,
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vec![ConflictPart {
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value: base_tree.value(&component).cloned().unwrap()
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}]
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);
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assert_eq!(
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conflict.adds,
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vec![ConflictPart {
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value: side1_tree.value(&component).cloned().unwrap()
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}]
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);
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}
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_ => panic!("unexpected value"),
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};
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let component = RepoPathComponent::from("abc");
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match merged_tree.value(&component).unwrap() {
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TreeValue::Conflict(id) => {
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let conflict = store
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.read_conflict(&RepoPath::from_internal_string("abc"), id)
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.unwrap();
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assert_eq!(
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conflict.removes,
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vec![ConflictPart {
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value: base_tree.value(&component).cloned().unwrap()
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}]
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);
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assert_eq!(
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conflict.adds,
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vec![
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ConflictPart {
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value: side1_tree.value(&component).cloned().unwrap()
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},
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ConflictPart {
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value: side2_tree.value(&component).cloned().unwrap()
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}
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]
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);
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}
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_ => panic!("unexpected value"),
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};
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}
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#[test_case(false ; "local backend")]
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#[test_case(true ; "git backend")]
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fn test_subtrees(use_git: bool) {
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// Tests that subtrees are merged.
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let test_repo = TestRepo::init(use_git);
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let repo = &test_repo.repo;
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let store = repo.store();
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let write_tree = |paths: Vec<&str>| -> Tree {
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let mut tree_builder = store.tree_builder(store.empty_tree_id().clone());
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for path in paths {
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testutils::write_normal_file(
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&mut tree_builder,
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&RepoPath::from_internal_string(path),
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&format!("contents of {path:?}"),
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);
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}
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let tree_id = tree_builder.write_tree();
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store.get_tree(&RepoPath::root(), &tree_id).unwrap()
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};
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let base_tree = write_tree(vec!["f1", "d1/f1", "d1/d1/f1", "d1/d1/d1/f1"]);
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let side1_tree = write_tree(vec![
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"f1",
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"f2",
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"d1/f1",
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"d1/f2",
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"d1/d1/f1",
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"d1/d1/d1/f1",
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]);
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let side2_tree = write_tree(vec![
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"f1",
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"d1/f1",
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"d1/d1/f1",
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"d1/d1/d1/f1",
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"d1/d1/d1/f2",
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]);
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let merged_tree_id = tree::merge_trees(&side1_tree, &base_tree, &side2_tree).unwrap();
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let merged_tree = store.get_tree(&RepoPath::root(), &merged_tree_id).unwrap();
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let entries = merged_tree.entries().collect_vec();
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let expected_tree = write_tree(vec![
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"f1",
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"f2",
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"d1/f1",
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"d1/f2",
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"d1/d1/f1",
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"d1/d1/d1/f1",
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"d1/d1/d1/f2",
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]);
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let expected_entries = expected_tree.entries().collect_vec();
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assert_eq!(entries, expected_entries);
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}
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#[test_case(false ; "local backend")]
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#[test_case(true ; "git backend")]
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fn test_subtree_becomes_empty(use_git: bool) {
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// Tests that subtrees that become empty are removed from the parent tree.
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let test_repo = TestRepo::init(use_git);
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let repo = &test_repo.repo;
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let store = repo.store();
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let write_tree = |paths: Vec<&str>| -> Tree {
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let mut tree_builder = store.tree_builder(store.empty_tree_id().clone());
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for path in paths {
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testutils::write_normal_file(
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&mut tree_builder,
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&RepoPath::from_internal_string(path),
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&format!("contents of {path:?}"),
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);
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}
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let tree_id = tree_builder.write_tree();
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store.get_tree(&RepoPath::root(), &tree_id).unwrap()
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};
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let base_tree = write_tree(vec!["f1", "d1/f1", "d1/d1/d1/f1", "d1/d1/d1/f2"]);
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let side1_tree = write_tree(vec!["f1", "d1/f1", "d1/d1/d1/f1"]);
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let side2_tree = write_tree(vec!["d1/d1/d1/f2"]);
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let merged_tree_id = tree::merge_trees(&side1_tree, &base_tree, &side2_tree).unwrap();
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let merged_tree = store.get_tree(&RepoPath::root(), &merged_tree_id).unwrap();
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assert_eq!(merged_tree.id(), store.empty_tree_id());
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}
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#[test_case(false ; "local backend")]
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#[test_case(true ; "git backend")]
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fn test_subtree_one_missing(use_git: bool) {
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// Tests that merging trees where one side is missing is resolved as if the
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// missing side was empty.
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let test_repo = TestRepo::init(use_git);
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let repo = &test_repo.repo;
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let store = repo.store();
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let write_tree = |paths: Vec<&str>| -> Tree {
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let mut tree_builder = store.tree_builder(store.empty_tree_id().clone());
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for path in paths {
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testutils::write_normal_file(
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&mut tree_builder,
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&RepoPath::from_internal_string(path),
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&format!("contents of {path:?}"),
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);
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}
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let tree_id = tree_builder.write_tree();
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store.get_tree(&RepoPath::root(), &tree_id).unwrap()
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};
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let tree1 = write_tree(vec![]);
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let tree2 = write_tree(vec!["d1/f1"]);
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let tree3 = write_tree(vec!["d1/f1", "d1/f2"]);
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// The two sides add different trees
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let merged_tree_id = tree::merge_trees(&tree2, &tree1, &tree3).unwrap();
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let merged_tree = store.get_tree(&RepoPath::root(), &merged_tree_id).unwrap();
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let expected_entries = write_tree(vec!["d1/f1", "d1/f2"]).entries().collect_vec();
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assert_eq!(merged_tree.entries().collect_vec(), expected_entries);
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// Same tree other way
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let merged_tree_id = tree::merge_trees(&tree3, &tree1, &tree2).unwrap();
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assert_eq!(merged_tree_id, *merged_tree.id());
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// One side removes, the other side modifies
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let merged_tree_id = tree::merge_trees(&tree1, &tree2, &tree3).unwrap();
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let merged_tree = store.get_tree(&RepoPath::root(), &merged_tree_id).unwrap();
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let expected_entries = write_tree(vec!["d1/f2"]).entries().collect_vec();
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assert_eq!(merged_tree.entries().collect_vec(), expected_entries);
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// Same tree other way
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let merged_tree_id = tree::merge_trees(&tree3, &tree2, &tree1).unwrap();
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assert_eq!(merged_tree_id, *merged_tree.id());
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}
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#[test_case(false ; "local backend")]
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#[test_case(true ; "git backend")]
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fn test_types(use_git: bool) {
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// Tests conflicts between different types. This is mostly to test that the
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// conflicts survive the roundtrip to the store.
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let test_repo = TestRepo::init(use_git);
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let repo = &test_repo.repo;
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let store = repo.store();
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let mut base_tree_builder = store.tree_builder(store.empty_tree_id().clone());
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let mut side1_tree_builder = store.tree_builder(store.empty_tree_id().clone());
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let mut side2_tree_builder = store.tree_builder(store.empty_tree_id().clone());
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testutils::write_normal_file(
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&mut base_tree_builder,
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&RepoPath::from_internal_string("normal_executable_symlink"),
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"contents",
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);
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testutils::write_executable_file(
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&mut side1_tree_builder,
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&RepoPath::from_internal_string("normal_executable_symlink"),
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"contents",
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);
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testutils::write_symlink(
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&mut side2_tree_builder,
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&RepoPath::from_internal_string("normal_executable_symlink"),
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"contents",
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);
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let tree_id = store.empty_tree_id().clone();
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base_tree_builder.set(
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RepoPath::from_internal_string("tree_normal_symlink"),
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TreeValue::Tree(tree_id),
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);
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testutils::write_normal_file(
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&mut side1_tree_builder,
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&RepoPath::from_internal_string("tree_normal_symlink"),
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"contents",
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);
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testutils::write_symlink(
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&mut side2_tree_builder,
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&RepoPath::from_internal_string("tree_normal_symlink"),
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"contents",
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);
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let base_tree_id = base_tree_builder.write_tree();
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let base_tree = store.get_tree(&RepoPath::root(), &base_tree_id).unwrap();
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let side1_tree_id = side1_tree_builder.write_tree();
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let side1_tree = store.get_tree(&RepoPath::root(), &side1_tree_id).unwrap();
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let side2_tree_id = side2_tree_builder.write_tree();
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let side2_tree = store.get_tree(&RepoPath::root(), &side2_tree_id).unwrap();
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// Created the merged tree
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let merged_tree_id = tree::merge_trees(&side1_tree, &base_tree, &side2_tree).unwrap();
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let merged_tree = store.get_tree(&RepoPath::root(), &merged_tree_id).unwrap();
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// Check the conflicting cases
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let component = RepoPathComponent::from("normal_executable_symlink");
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match merged_tree.value(&component).unwrap() {
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TreeValue::Conflict(id) => {
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let conflict = store
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.read_conflict(
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&RepoPath::from_internal_string("normal_executable_symlink"),
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id,
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)
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.unwrap();
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assert_eq!(
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conflict.removes,
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vec![ConflictPart {
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value: base_tree.value(&component).cloned().unwrap()
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}]
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);
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assert_eq!(
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conflict.adds,
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vec![
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ConflictPart {
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value: side1_tree.value(&component).cloned().unwrap()
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},
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ConflictPart {
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value: side2_tree.value(&component).cloned().unwrap()
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},
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]
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);
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}
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_ => panic!("unexpected value"),
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};
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let component = RepoPathComponent::from("tree_normal_symlink");
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match merged_tree.value(&component).unwrap() {
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TreeValue::Conflict(id) => {
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let conflict = store
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.read_conflict(&RepoPath::from_internal_string("tree_normal_symlink"), id)
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.unwrap();
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assert_eq!(
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conflict.removes,
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vec![ConflictPart {
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value: base_tree.value(&component).cloned().unwrap()
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}]
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);
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assert_eq!(
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conflict.adds,
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vec![
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ConflictPart {
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value: side1_tree.value(&component).cloned().unwrap()
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},
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ConflictPart {
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value: side2_tree.value(&component).cloned().unwrap()
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},
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]
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);
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}
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_ => panic!("unexpected value"),
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};
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}
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|
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#[test_case(false ; "local backend")]
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#[test_case(true ; "git backend")]
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fn test_simplify_conflict(use_git: bool) {
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let test_repo = TestRepo::init(use_git);
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let repo = &test_repo.repo;
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let store = repo.store();
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let component = RepoPathComponent::from("file");
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let path = RepoPath::from_internal_string("file");
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let write_tree =
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|contents: &str| -> Tree { testutils::create_tree(repo, &[(&path, contents)]) };
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let base_tree = write_tree("base contents");
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let branch_tree = write_tree("branch contents");
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let upstream1_tree = write_tree("upstream1 contents");
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let upstream2_tree = write_tree("upstream2 contents");
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|
|
let merge_trees = |base: &Tree, side1: &Tree, side2: &Tree| -> Tree {
|
|
let tree_id = tree::merge_trees(side1, base, side2).unwrap();
|
|
store.get_tree(&RepoPath::root(), &tree_id).unwrap()
|
|
};
|
|
|
|
// Rebase the branch tree to the first upstream tree
|
|
let rebased1_tree = merge_trees(&base_tree, &branch_tree, &upstream1_tree);
|
|
// Make sure we have a conflict (testing the test setup)
|
|
match rebased1_tree.value(&component).unwrap() {
|
|
TreeValue::Conflict(_) => {
|
|
// expected
|
|
}
|
|
_ => panic!("unexpected value"),
|
|
};
|
|
|
|
// Rebase the rebased tree back to the base. The conflict should be gone. Try
|
|
// both directions.
|
|
let rebased_back_tree = merge_trees(&upstream1_tree, &rebased1_tree, &base_tree);
|
|
assert_eq!(
|
|
rebased_back_tree.value(&component),
|
|
branch_tree.value(&component)
|
|
);
|
|
let rebased_back_tree = merge_trees(&upstream1_tree, &base_tree, &rebased1_tree);
|
|
assert_eq!(
|
|
rebased_back_tree.value(&component),
|
|
branch_tree.value(&component)
|
|
);
|
|
|
|
// Rebase the rebased tree further upstream. The conflict should be simplified
|
|
// to not mention the contents from the first rebase.
|
|
let further_rebased_tree = merge_trees(&upstream1_tree, &rebased1_tree, &upstream2_tree);
|
|
match further_rebased_tree.value(&component).unwrap() {
|
|
TreeValue::Conflict(id) => {
|
|
let conflict = store
|
|
.read_conflict(&RepoPath::from_components(vec![component.clone()]), id)
|
|
.unwrap();
|
|
assert_eq!(
|
|
conflict.removes,
|
|
vec![ConflictPart {
|
|
value: base_tree.value(&component).cloned().unwrap()
|
|
}]
|
|
);
|
|
assert_eq!(
|
|
conflict.adds,
|
|
vec![
|
|
ConflictPart {
|
|
value: branch_tree.value(&component).cloned().unwrap()
|
|
},
|
|
ConflictPart {
|
|
value: upstream2_tree.value(&component).cloned().unwrap()
|
|
},
|
|
]
|
|
);
|
|
}
|
|
_ => panic!("unexpected value"),
|
|
};
|
|
let further_rebased_tree = merge_trees(&upstream1_tree, &upstream2_tree, &rebased1_tree);
|
|
match further_rebased_tree.value(&component).unwrap() {
|
|
TreeValue::Conflict(id) => {
|
|
let conflict = store.read_conflict(&path, id).unwrap();
|
|
assert_eq!(
|
|
conflict.removes,
|
|
vec![ConflictPart {
|
|
value: base_tree.value(&component).cloned().unwrap()
|
|
}]
|
|
);
|
|
assert_eq!(
|
|
conflict.adds,
|
|
vec![
|
|
ConflictPart {
|
|
value: upstream2_tree.value(&component).cloned().unwrap()
|
|
},
|
|
ConflictPart {
|
|
value: branch_tree.value(&component).cloned().unwrap()
|
|
},
|
|
]
|
|
);
|
|
}
|
|
_ => panic!("unexpected value"),
|
|
};
|
|
}
|
|
|
|
#[test_case(false ; "local backend")]
|
|
#[test_case(true ; "git backend")]
|
|
fn test_simplify_conflict_after_resolving_parent(use_git: bool) {
|
|
let settings = testutils::user_settings();
|
|
let test_repo = TestRepo::init(use_git);
|
|
let repo = &test_repo.repo;
|
|
|
|
// Set up a repo like this:
|
|
// D
|
|
// | C
|
|
// | B
|
|
// |/
|
|
// A
|
|
//
|
|
// Commit A has a file with 3 lines. B and D make conflicting changes to the
|
|
// first line. C changes the third line. We then rebase B and C onto D,
|
|
// which creates a conflict. We resolve the conflict in the first line and
|
|
// rebase C2 (the rebased C) onto the resolved conflict. C3 should not have
|
|
// a conflict since it changed an unrelated line.
|
|
let path = RepoPath::from_internal_string("dir/file");
|
|
let mut tx = repo.start_transaction(&settings, "test");
|
|
let tree_a = testutils::create_tree(repo, &[(&path, "abc\ndef\nghi\n")]);
|
|
let commit_a = tx
|
|
.mut_repo()
|
|
.new_commit(
|
|
&settings,
|
|
vec![repo.store().root_commit_id().clone()],
|
|
tree_a.id().clone(),
|
|
)
|
|
.write()
|
|
.unwrap();
|
|
let tree_b = testutils::create_tree(repo, &[(&path, "Abc\ndef\nghi\n")]);
|
|
let commit_b = tx
|
|
.mut_repo()
|
|
.new_commit(&settings, vec![commit_a.id().clone()], tree_b.id().clone())
|
|
.write()
|
|
.unwrap();
|
|
let tree_c = testutils::create_tree(repo, &[(&path, "Abc\ndef\nGhi\n")]);
|
|
let commit_c = tx
|
|
.mut_repo()
|
|
.new_commit(&settings, vec![commit_b.id().clone()], tree_c.id().clone())
|
|
.write()
|
|
.unwrap();
|
|
let tree_d = testutils::create_tree(repo, &[(&path, "abC\ndef\nghi\n")]);
|
|
let commit_d = tx
|
|
.mut_repo()
|
|
.new_commit(&settings, vec![commit_a.id().clone()], tree_d.id().clone())
|
|
.write()
|
|
.unwrap();
|
|
|
|
let commit_b2 = rebase_commit(&settings, tx.mut_repo(), &commit_b, &[commit_d]).unwrap();
|
|
let commit_c2 =
|
|
rebase_commit(&settings, tx.mut_repo(), &commit_c, &[commit_b2.clone()]).unwrap();
|
|
|
|
// Test the setup: Both B and C should have conflicts.
|
|
assert_matches!(
|
|
commit_b2.tree().path_value(&path),
|
|
Some(TreeValue::Conflict(_))
|
|
);
|
|
assert_matches!(
|
|
commit_c2.tree().path_value(&path),
|
|
Some(TreeValue::Conflict(_))
|
|
);
|
|
|
|
// Create the resolved B and rebase C on top.
|
|
let tree_b3 = testutils::create_tree(repo, &[(&path, "AbC\ndef\nghi\n")]);
|
|
let commit_b3 = tx
|
|
.mut_repo()
|
|
.rewrite_commit(&settings, &commit_b2)
|
|
.set_tree(tree_b3.id().clone())
|
|
.write()
|
|
.unwrap();
|
|
let commit_c3 = rebase_commit(&settings, tx.mut_repo(), &commit_c2, &[commit_b3]).unwrap();
|
|
tx.mut_repo().rebase_descendants(&settings).unwrap();
|
|
let repo = tx.commit();
|
|
|
|
// The conflict should now be resolved.
|
|
let resolved_value = commit_c3.tree().path_value(&path);
|
|
match resolved_value {
|
|
Some(TreeValue::File {
|
|
id,
|
|
executable: false,
|
|
}) => {
|
|
assert_eq!(
|
|
testutils::read_file(repo.store(), &path, &id),
|
|
b"AbC\ndef\nGhi\n"
|
|
);
|
|
}
|
|
other => {
|
|
panic!("unexpected value: {other:#?}");
|
|
}
|
|
}
|
|
}
|
|
|
|
// TODO: Add tests for simplification of multi-way conflicts. Both the content
|
|
// and the executable bit need testing.
|