forked from mirrors/jj
fb33620f9e
The original idea was similar to Mercurial's "topo" sorting, but it was bad at handling merge-heavy history. In order to render merges of topic branches nicely, we need to prioritize branches at merge point, not at fork point. OTOH, we do also want to place unmerged branches as close to the fork point as possible. This commit implements the former requirement, and the latter will be addressed by the next commit. I think this is similar to Git's sorting logic described in the following blog post. In our case, the in-degree walk can be dumb since topological order is guaranteed by the index. We keep HashSet<CommitId> instead of an in-degree integer value, which will be used in the next commit to resolve new heads as late as possible. https://github.blog/2022-08-30-gits-database-internals-ii-commit-history-queries/#topological-sorting Compared to Sapling's beautify_graph(), this is lazy, and can roughly preserve the index (or chronological) order. I tried beautify_graph() with prioritizing the @ commit, but the result seemed too aggressively reordered. Perhaps, for more complex history, beautify_graph() would produce a better result. For my wip branches (~30 branches, a couple of commits per branch), this works pretty well. #242
470 lines
18 KiB
Rust
470 lines
18 KiB
Rust
// Copyright 2022 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::path::Path;
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use git2::Oid;
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use crate::common::TestEnvironment;
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pub mod common;
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#[test]
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fn test_git_colocated() {
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let test_env = TestEnvironment::default();
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let workspace_root = test_env.env_root().join("repo");
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let git_repo = git2::Repository::init(&workspace_root).unwrap();
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// Create an initial commit in Git
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std::fs::write(workspace_root.join("file"), "contents").unwrap();
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git_repo
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.index()
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.unwrap()
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.add_path(Path::new("file"))
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.unwrap();
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let tree1_oid = git_repo.index().unwrap().write_tree().unwrap();
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let tree1 = git_repo.find_tree(tree1_oid).unwrap();
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let signature = git2::Signature::new(
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"Someone",
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"someone@example.com",
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&git2::Time::new(1234567890, 60),
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)
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.unwrap();
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git_repo
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.commit(
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Some("refs/heads/master"),
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&signature,
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&signature,
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"initial",
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&tree1,
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&[],
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)
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.unwrap();
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insta::assert_snapshot!(
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git_repo.head().unwrap().peel_to_commit().unwrap().id().to_string(),
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@"e61b6729ff4292870702f2f72b2a60165679ef37"
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);
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// Import the repo
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test_env.jj_cmd_success(&workspace_root, &["init", "--git-repo", "."]);
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insta::assert_snapshot!(get_log_output(&test_env, &workspace_root), @r###"
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@ 3e9369cd54227eb88455e1834dbc08aad6a16ac4
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◉ e61b6729ff4292870702f2f72b2a60165679ef37 master HEAD@git initial
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◉ 0000000000000000000000000000000000000000
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"###);
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insta::assert_snapshot!(
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git_repo.head().unwrap().peel_to_commit().unwrap().id().to_string(),
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@"e61b6729ff4292870702f2f72b2a60165679ef37"
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);
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// Modify the working copy. The working-copy commit should changed, but the Git
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// HEAD commit should not
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std::fs::write(workspace_root.join("file"), "modified").unwrap();
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insta::assert_snapshot!(get_log_output(&test_env, &workspace_root), @r###"
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@ b26951a9c6f5c270e4d039880208952fd5faae5e
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◉ e61b6729ff4292870702f2f72b2a60165679ef37 master HEAD@git initial
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◉ 0000000000000000000000000000000000000000
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"###);
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insta::assert_snapshot!(
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git_repo.head().unwrap().peel_to_commit().unwrap().id().to_string(),
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@"e61b6729ff4292870702f2f72b2a60165679ef37"
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);
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// Create a new change from jj and check that it's reflected in Git
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test_env.jj_cmd_success(&workspace_root, &["new"]);
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insta::assert_snapshot!(get_log_output(&test_env, &workspace_root), @r###"
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@ 9dbb23ff2ff5e66c43880f1042369d704f7a321e
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◉ b26951a9c6f5c270e4d039880208952fd5faae5e HEAD@git
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◉ e61b6729ff4292870702f2f72b2a60165679ef37 master initial
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◉ 0000000000000000000000000000000000000000
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"###);
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insta::assert_snapshot!(
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git_repo.head().unwrap().target().unwrap().to_string(),
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@"b26951a9c6f5c270e4d039880208952fd5faae5e"
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);
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}
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#[test]
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fn test_git_colocated_export_branches_on_snapshot() {
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// Checks that we export branches that were changed only because the working
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// copy was snapshotted
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let test_env = TestEnvironment::default();
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let workspace_root = test_env.env_root().join("repo");
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let git_repo = git2::Repository::init(&workspace_root).unwrap();
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test_env.jj_cmd_success(&workspace_root, &["init", "--git-repo", "."]);
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// Create branch pointing to the initial commit
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std::fs::write(workspace_root.join("file"), "initial").unwrap();
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test_env.jj_cmd_success(&workspace_root, &["branch", "create", "foo"]);
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insta::assert_snapshot!(get_log_output(&test_env, &workspace_root), @r###"
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@ 438471f3fbf1004298d8fb01eeb13663a051a643 foo
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◉ 0000000000000000000000000000000000000000
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"###);
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// The branch gets updated when we modify the working copy, and it should get
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// exported to Git without requiring any other changes
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std::fs::write(workspace_root.join("file"), "modified").unwrap();
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insta::assert_snapshot!(get_log_output(&test_env, &workspace_root), @r###"
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@ fab22d1acf5bb9c5aa48cb2c3dd2132072a359ca foo
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◉ 0000000000000000000000000000000000000000
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"###);
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insta::assert_snapshot!(git_repo
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.find_reference("refs/heads/foo")
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.unwrap()
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.target()
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.unwrap()
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.to_string(), @"fab22d1acf5bb9c5aa48cb2c3dd2132072a359ca");
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}
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#[test]
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fn test_git_colocated_rebase_on_import() {
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let test_env = TestEnvironment::default();
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let workspace_root = test_env.env_root().join("repo");
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let git_repo = git2::Repository::init(&workspace_root).unwrap();
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test_env.jj_cmd_success(&workspace_root, &["init", "--git-repo", "."]);
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// Make some changes in jj and check that they're reflected in git
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std::fs::write(workspace_root.join("file"), "contents").unwrap();
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test_env.jj_cmd_success(&workspace_root, &["commit", "-m", "add a file"]);
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std::fs::write(workspace_root.join("file"), "modified").unwrap();
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test_env.jj_cmd_success(&workspace_root, &["branch", "set", "master"]);
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test_env.jj_cmd_success(&workspace_root, &["commit", "-m", "modify a file"]);
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// TODO: We shouldn't need this command here to trigger an import of the
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// refs/heads/master we just exported
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test_env.jj_cmd_success(&workspace_root, &["st"]);
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// Move `master` and HEAD backwards, which should result in commit2 getting
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// hidden, and a new working-copy commit at the new position.
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let commit2_oid = git_repo
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.find_branch("master", git2::BranchType::Local)
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.unwrap()
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.get()
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.target()
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.unwrap();
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let commit2 = git_repo.find_commit(commit2_oid).unwrap();
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let commit1 = commit2.parents().next().unwrap();
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git_repo.branch("master", &commit1, true).unwrap();
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git_repo.set_head("refs/heads/master").unwrap();
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insta::assert_snapshot!(get_log_output(&test_env, &workspace_root), @r###"
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@ 7f96185cfbe36341d0f9a86ebfaeab67a5922c7e
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◉ 4bcbeaba9a4b309c5f45a8807fbf5499b9714315 master HEAD@git add a file
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◉ 0000000000000000000000000000000000000000
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"###);
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}
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#[test]
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fn test_git_colocated_branches() {
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let test_env = TestEnvironment::default();
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let workspace_root = test_env.env_root().join("repo");
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let git_repo = git2::Repository::init(&workspace_root).unwrap();
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test_env.jj_cmd_success(&workspace_root, &["init", "--git-repo", "."]);
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test_env.jj_cmd_success(&workspace_root, &["new", "-m", "foo"]);
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test_env.jj_cmd_success(&workspace_root, &["new", "@-", "-m", "bar"]);
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insta::assert_snapshot!(get_log_output(&test_env, &workspace_root), @r###"
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@ 3560559274ab431feea00b7b7e0b9250ecce951f bar
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│ ◉ 1e6f0b403ed2ff9713b5d6b1dc601e4804250cda foo
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├─╯
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◉ 230dd059e1b059aefc0da06a2e5a7dbf22362f22 master HEAD@git
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◉ 0000000000000000000000000000000000000000
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"###);
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// Create a branch in jj. It should be exported to Git even though it points to
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// the working- copy commit.
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test_env.jj_cmd_success(&workspace_root, &["branch", "set", "master"]);
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insta::assert_snapshot!(
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git_repo.find_reference("refs/heads/master").unwrap().target().unwrap().to_string(),
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@"3560559274ab431feea00b7b7e0b9250ecce951f"
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);
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insta::assert_snapshot!(
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git_repo.head().unwrap().target().unwrap().to_string(),
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@"230dd059e1b059aefc0da06a2e5a7dbf22362f22"
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);
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// Update the branch in Git
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let target_id = test_env.jj_cmd_success(
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&workspace_root,
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&["log", "--no-graph", "-T=commit_id", "-r=description(foo)"],
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);
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git_repo
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.reference(
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"refs/heads/master",
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Oid::from_str(&target_id).unwrap(),
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true,
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"test",
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)
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.unwrap();
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insta::assert_snapshot!(get_log_output(&test_env, &workspace_root), @r###"
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Working copy now at: 096dc80da670 (no description set)
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Parent commit : 230dd059e1b0 (no description set)
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@ 096dc80da67094fbaa6683e2a205dddffa31f9a8
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│ ◉ 1e6f0b403ed2ff9713b5d6b1dc601e4804250cda master foo
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├─╯
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◉ 230dd059e1b059aefc0da06a2e5a7dbf22362f22 HEAD@git
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◉ 0000000000000000000000000000000000000000
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"###);
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}
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#[test]
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fn test_git_colocated_branch_forget() {
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let test_env = TestEnvironment::default();
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let workspace_root = test_env.env_root().join("repo");
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let _git_repo = git2::Repository::init(&workspace_root).unwrap();
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test_env.jj_cmd_success(&workspace_root, &["init", "--git-repo", "."]);
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test_env.jj_cmd_success(&workspace_root, &["new"]);
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test_env.jj_cmd_success(&workspace_root, &["branch", "set", "foo"]);
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insta::assert_snapshot!(get_log_output(&test_env, &workspace_root), @r###"
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@ 65b6b74e08973b88d38404430f119c8c79465250 foo
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◉ 230dd059e1b059aefc0da06a2e5a7dbf22362f22 master HEAD@git
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◉ 0000000000000000000000000000000000000000
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"###);
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let stdout = test_env.jj_cmd_success(&workspace_root, &["branch", "list"]);
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insta::assert_snapshot!(stdout, @r###"
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foo: 65b6b74e0897 (no description set)
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master: 230dd059e1b0 (no description set)
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"###);
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let stdout = test_env.jj_cmd_success(&workspace_root, &["branch", "forget", "foo"]);
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insta::assert_snapshot!(stdout, @"");
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// A forgotten branch is deleted in the git repo. For a detailed demo explaining
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// this, see `test_branch_forget_export` in `test_branch_command.rs`.
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let stdout = test_env.jj_cmd_success(&workspace_root, &["branch", "list"]);
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insta::assert_snapshot!(stdout, @r###"
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master: 230dd059e1b0 (no description set)
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"###);
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}
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#[test]
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fn test_git_colocated_conflicting_git_refs() {
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let test_env = TestEnvironment::default();
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let workspace_root = test_env.env_root().join("repo");
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git2::Repository::init(&workspace_root).unwrap();
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test_env.jj_cmd_success(&workspace_root, &["init", "--git-repo", "."]);
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test_env.jj_cmd_success(&workspace_root, &["branch", "create", "main"]);
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let (stdout, stderr) = test_env.jj_cmd_ok(&workspace_root, &["branch", "create", "main/sub"]);
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insta::assert_snapshot!(stdout, @"");
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insta::assert_snapshot!(stderr, @r###"
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Failed to export some branches:
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main/sub
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Hint: Git doesn't allow a branch name that looks like a parent directory of
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another (e.g. `foo` and `foo/bar`). Try to rename the branches that failed to
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export or their "parent" branches.
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"###);
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}
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#[test]
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fn test_git_colocated_fetch_deleted_or_moved_branch() {
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let test_env = TestEnvironment::default();
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let origin_path = test_env.env_root().join("origin");
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git2::Repository::init(&origin_path).unwrap();
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test_env.jj_cmd_success(&origin_path, &["init", "--git-repo=."]);
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test_env.jj_cmd_success(&origin_path, &["describe", "-m=A"]);
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test_env.jj_cmd_success(&origin_path, &["branch", "create", "A"]);
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test_env.jj_cmd_success(&origin_path, &["new", "-m=B_to_delete"]);
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test_env.jj_cmd_success(&origin_path, &["branch", "create", "B_to_delete"]);
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test_env.jj_cmd_success(&origin_path, &["new", "-m=original C", "@-"]);
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test_env.jj_cmd_success(&origin_path, &["branch", "create", "C_to_move"]);
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let clone_path = test_env.env_root().join("clone");
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git2::Repository::clone(origin_path.to_str().unwrap(), &clone_path).unwrap();
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test_env.jj_cmd_success(&clone_path, &["init", "--git-repo=."]);
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test_env.jj_cmd_success(&clone_path, &["new", "A"]);
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insta::assert_snapshot!(get_log_output(&test_env, &clone_path), @r###"
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@ 0335878796213c3a701f1c9c34dcae242bee4131
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│ ◉ 8d4e006fd63547965fbc3a26556a9aa531076d32 C_to_move original C
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├─╯
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│ ◉ 929e298ae9edf969b405a304c75c10457c47d52c B_to_delete B_to_delete
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├─╯
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◉ a86754f975f953fa25da4265764adc0c62e9ce6b A master HEAD@git A
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◉ 0000000000000000000000000000000000000000
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"###);
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test_env.jj_cmd_success(&origin_path, &["branch", "delete", "B_to_delete"]);
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// Move branch C sideways
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test_env.jj_cmd_success(&origin_path, &["describe", "C_to_move", "-m", "moved C"]);
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let stdout = test_env.jj_cmd_success(&clone_path, &["git", "fetch"]);
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insta::assert_snapshot!(stdout, @"");
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// "original C" and "B_to_delete" are abandoned, as the corresponding branches
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// were deleted or moved on the remote (#864)
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insta::assert_snapshot!(get_log_output(&test_env, &clone_path), @r###"
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◉ 04fd29df05638156b20044b3b6136b42abcb09ab C_to_move moved C
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│ @ 0335878796213c3a701f1c9c34dcae242bee4131
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├─╯
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◉ a86754f975f953fa25da4265764adc0c62e9ce6b A master HEAD@git A
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◉ 0000000000000000000000000000000000000000
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"###);
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}
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#[test]
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fn test_git_colocated_external_checkout() {
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let test_env = TestEnvironment::default();
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let repo_path = test_env.env_root().join("repo");
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let git_repo = git2::Repository::init(&repo_path).unwrap();
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test_env.jj_cmd_success(&repo_path, &["init", "--git-repo=."]);
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test_env.jj_cmd_success(&repo_path, &["ci", "-m=A"]);
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test_env.jj_cmd_success(&repo_path, &["new", "-m=B", "root"]);
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test_env.jj_cmd_success(&repo_path, &["new"]);
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// Checked out anonymous branch
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insta::assert_snapshot!(get_log_output(&test_env, &repo_path), @r###"
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@ 53637cd508ff02427dd78eca98f5b2450a6370ce
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◉ 66f4d1806ae41bd604f69155dece64062a0056cf HEAD@git B
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│ ◉ a86754f975f953fa25da4265764adc0c62e9ce6b master A
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├─╯
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◉ 0000000000000000000000000000000000000000
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"###);
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// Check out another branch by external command
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git_repo
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.set_head_detached(
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git_repo
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.find_reference("refs/heads/master")
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.unwrap()
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.target()
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.unwrap(),
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)
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.unwrap();
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// The old working-copy commit gets abandoned, but the whole branch should not
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// be abandoned. (#1042)
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insta::assert_snapshot!(get_log_output(&test_env, &repo_path), @r###"
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@ 0521ce3b8c4e29aab79f3c750e2845dcbc4c3874
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◉ a86754f975f953fa25da4265764adc0c62e9ce6b master HEAD@git A
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│ ◉ 66f4d1806ae41bd604f69155dece64062a0056cf B
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├─╯
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◉ 0000000000000000000000000000000000000000
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"###);
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}
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#[test]
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fn test_git_colocated_squash_undo() {
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let test_env = TestEnvironment::default();
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let repo_path = test_env.env_root().join("repo");
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git2::Repository::init(&repo_path).unwrap();
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test_env.jj_cmd_success(&repo_path, &["init", "--git-repo=."]);
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test_env.jj_cmd_success(&repo_path, &["ci", "-m=A"]);
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// Test the setup
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insta::assert_snapshot!(get_log_output_divergence(&test_env, &repo_path), @r###"
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@ rlvkpnrzqnoo 8f71e3b6a3be
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◉ qpvuntsmwlqt a86754f975f9 A master HEAD@git
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◉ zzzzzzzzzzzz 000000000000
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"###);
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test_env.jj_cmd_success(&repo_path, &["squash"]);
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insta::assert_snapshot!(get_log_output_divergence(&test_env, &repo_path), @r###"
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@ zsuskulnrvyr f0c12b0396d9
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◉ qpvuntsmwlqt 2f376ea1478c A master HEAD@git
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◉ zzzzzzzzzzzz 000000000000
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"###);
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test_env.jj_cmd_success(&repo_path, &["undo"]);
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// TODO: There should be no divergence here; 2f376ea1478c should be hidden
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// (#922)
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insta::assert_snapshot!(get_log_output_divergence(&test_env, &repo_path), @r###"
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@ rlvkpnrzqnoo 8f71e3b6a3be
|
|
◉ qpvuntsmwlqt a86754f975f9 A master HEAD@git
|
|
◉ zzzzzzzzzzzz 000000000000
|
|
"###);
|
|
}
|
|
|
|
fn get_log_output_divergence(test_env: &TestEnvironment, repo_path: &Path) -> String {
|
|
let template = r###"
|
|
separate(" ",
|
|
change_id.short(),
|
|
commit_id.short(),
|
|
description.first_line(),
|
|
branches,
|
|
git_head,
|
|
if(divergent, "!divergence!"),
|
|
)
|
|
"###;
|
|
test_env.jj_cmd_success(repo_path, &["log", "-T", template])
|
|
}
|
|
|
|
fn get_log_output(test_env: &TestEnvironment, workspace_root: &Path) -> String {
|
|
let template = r#"separate(" ", commit_id, branches, git_head, description)"#;
|
|
test_env.jj_cmd_success(workspace_root, &["log", "-T", template, "-r=all()"])
|
|
}
|
|
|
|
#[test]
|
|
fn test_git_colocated_unreachable_commits() {
|
|
let test_env = TestEnvironment::default();
|
|
let workspace_root = test_env.env_root().join("repo");
|
|
let git_repo = git2::Repository::init(&workspace_root).unwrap();
|
|
|
|
// Create an initial commit in Git
|
|
let empty_tree_oid = git_repo.treebuilder(None).unwrap().write().unwrap();
|
|
let tree1 = git_repo.find_tree(empty_tree_oid).unwrap();
|
|
let signature = git2::Signature::new(
|
|
"Someone",
|
|
"someone@example.com",
|
|
&git2::Time::new(1234567890, 60),
|
|
)
|
|
.unwrap();
|
|
let oid1 = git_repo
|
|
.commit(
|
|
Some("refs/heads/master"),
|
|
&signature,
|
|
&signature,
|
|
"initial",
|
|
&tree1,
|
|
&[],
|
|
)
|
|
.unwrap();
|
|
insta::assert_snapshot!(
|
|
git_repo.head().unwrap().peel_to_commit().unwrap().id().to_string(),
|
|
@"2ee37513d2b5e549f7478c671a780053614bff19"
|
|
);
|
|
|
|
// Add a second commit in Git
|
|
let tree2 = git_repo.find_tree(empty_tree_oid).unwrap();
|
|
let signature = git2::Signature::new(
|
|
"Someone",
|
|
"someone@example.com",
|
|
&git2::Time::new(1234567890, 62),
|
|
)
|
|
.unwrap();
|
|
let oid2 = git_repo
|
|
.commit(
|
|
None,
|
|
&signature,
|
|
&signature,
|
|
"next",
|
|
&tree2,
|
|
&[&git_repo.find_commit(oid1).unwrap()],
|
|
)
|
|
.unwrap();
|
|
insta::assert_snapshot!(
|
|
git_repo.head().unwrap().peel_to_commit().unwrap().id().to_string(),
|
|
@"2ee37513d2b5e549f7478c671a780053614bff19"
|
|
);
|
|
|
|
// Import the repo while there is no path to the second commit
|
|
test_env.jj_cmd_success(&workspace_root, &["init", "--git-repo", "."]);
|
|
insta::assert_snapshot!(get_log_output(&test_env, &workspace_root), @r###"
|
|
@ 66ae47cee4f8c28ee8d7e4f5d9401b03c07e22f2
|
|
◉ 2ee37513d2b5e549f7478c671a780053614bff19 master HEAD@git initial
|
|
◉ 0000000000000000000000000000000000000000
|
|
"###);
|
|
insta::assert_snapshot!(
|
|
git_repo.head().unwrap().peel_to_commit().unwrap().id().to_string(),
|
|
@"2ee37513d2b5e549f7478c671a780053614bff19"
|
|
);
|
|
|
|
// Check that trying to look up the second commit fails gracefully
|
|
let stderr = test_env.jj_cmd_failure(&workspace_root, &["show", &oid2.to_string()]);
|
|
insta::assert_snapshot!(stderr, @r###"
|
|
Error: Revision "8e713ff77b54928dd4a82aaabeca44b1ae91722c" doesn't exist
|
|
"###);
|
|
}
|