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jj/lib/tests/test_git.rs
Yuya Nishihara 38a7e7fd62 git_backend: on read_commit(), bulk-update extra metadata table of ancestors 
Otherwise, "jj init --git-repo ." would create extra table files per commit,
and merge them.

I considered adding an explicit GitBackend method to be called from
git::import_refs(), but the call order matters. The method should be invoked
before calling store.get_commit(..) or mut_repo.add_head(..). Since commits
are likely to be loaded from the head, we can instead make read_commit()
import ancestor metadata at all.

Alternatively, we could make a Git commit hidden until it's inserted into
the extra table. It's rather big change, and I wouldn't like to do that
without thinking more thoroughly.
2023-05-21 08:29:00 +09:00

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// Copyright 2020 The Jujutsu Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::collections::{BTreeMap, HashSet};
use std::path::PathBuf;
use std::sync::{mpsc, Arc, Barrier};
use std::thread;
use git2::Oid;
use itertools::Itertools;
use jujutsu_lib::backend::{
BackendError, ChangeId, CommitId, MillisSinceEpoch, ObjectId, Signature, Timestamp,
};
use jujutsu_lib::commit::Commit;
use jujutsu_lib::commit_builder::CommitBuilder;
use jujutsu_lib::git;
use jujutsu_lib::git::{GitFetchError, GitPushError, GitRefUpdate};
use jujutsu_lib::git_backend::GitBackend;
use jujutsu_lib::op_store::{BranchTarget, RefTarget};
use jujutsu_lib::repo::{MutableRepo, ReadonlyRepo, Repo};
use jujutsu_lib::settings::{GitSettings, UserSettings};
use maplit::{btreemap, hashset};
use tempfile::TempDir;
use testutils::{create_random_commit, load_repo_at_head, write_random_commit, TestRepo};
fn empty_git_commit<'r>(
git_repo: &'r git2::Repository,
ref_name: &str,
parents: &[&git2::Commit],
) -> git2::Commit<'r> {
let signature = git2::Signature::now("Someone", "someone@example.com").unwrap();
let empty_tree_id = Oid::from_str("4b825dc642cb6eb9a060e54bf8d69288fbee4904").unwrap();
let empty_tree = git_repo.find_tree(empty_tree_id).unwrap();
let oid = git_repo
.commit(
Some(ref_name),
&signature,
&signature,
&format!("random commit {}", rand::random::<u32>()),
&empty_tree,
parents,
)
.unwrap();
git_repo.find_commit(oid).unwrap()
}
fn jj_id(commit: &git2::Commit) -> CommitId {
CommitId::from_bytes(commit.id().as_bytes())
}
fn git_id(commit: &Commit) -> Oid {
Oid::from_bytes(commit.id().as_bytes()).unwrap()
}
fn get_git_repo(repo: &Arc<ReadonlyRepo>) -> git2::Repository {
repo.store()
.backend_impl()
.downcast_ref::<GitBackend>()
.unwrap()
.git_repo_clone()
}
#[test]
fn test_import_refs() {
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_repo = TestRepo::init(true);
let repo = &test_repo.repo;
let git_repo = get_git_repo(repo);
let commit1 = empty_git_commit(&git_repo, "refs/heads/main", &[]);
git_ref(&git_repo, "refs/remotes/origin/main", commit1.id());
let commit2 = empty_git_commit(&git_repo, "refs/heads/main", &[&commit1]);
let commit3 = empty_git_commit(&git_repo, "refs/heads/feature1", &[&commit2]);
let commit4 = empty_git_commit(&git_repo, "refs/heads/feature2", &[&commit2]);
let commit5 = empty_git_commit(&git_repo, "refs/tags/v1.0", &[&commit1]);
let commit6 = empty_git_commit(&git_repo, "refs/remotes/origin/feature3", &[&commit1]);
// Should not be imported
empty_git_commit(&git_repo, "refs/notes/x", &[&commit2]);
empty_git_commit(&git_repo, "refs/remotes/origin/HEAD", &[&commit2]);
git_repo.set_head("refs/heads/main").unwrap();
let git_repo = get_git_repo(repo);
let mut tx = repo.start_transaction(&settings, "test");
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
let repo = tx.commit();
let view = repo.view();
let expected_heads = hashset! {
jj_id(&commit3),
jj_id(&commit4),
jj_id(&commit5),
jj_id(&commit6)
};
assert_eq!(*view.heads(), expected_heads);
let expected_main_branch = BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&commit2))),
remote_targets: btreemap! {
"origin".to_string() => RefTarget::Normal(jj_id(&commit1)),
},
};
assert_eq!(
view.branches().get("main"),
Some(expected_main_branch).as_ref()
);
let expected_feature1_branch = BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&commit3))),
remote_targets: btreemap! {},
};
assert_eq!(
view.branches().get("feature1"),
Some(expected_feature1_branch).as_ref()
);
let expected_feature2_branch = BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&commit4))),
remote_targets: btreemap! {},
};
assert_eq!(
view.branches().get("feature2"),
Some(expected_feature2_branch).as_ref()
);
let expected_feature3_branch = BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&commit6))),
remote_targets: btreemap! {
"origin".to_string() => RefTarget::Normal(jj_id(&commit6)),
},
};
assert_eq!(
view.branches().get("feature3"),
Some(expected_feature3_branch).as_ref()
);
assert_eq!(
view.tags().get("v1.0"),
Some(RefTarget::Normal(jj_id(&commit5))).as_ref()
);
assert_eq!(view.git_refs().len(), 6);
assert_eq!(
view.git_refs().get("refs/heads/main"),
Some(RefTarget::Normal(jj_id(&commit2))).as_ref()
);
assert_eq!(
view.git_refs().get("refs/heads/feature1"),
Some(RefTarget::Normal(jj_id(&commit3))).as_ref()
);
assert_eq!(
view.git_refs().get("refs/heads/feature2"),
Some(RefTarget::Normal(jj_id(&commit4))).as_ref()
);
assert_eq!(
view.git_refs().get("refs/remotes/origin/main"),
Some(RefTarget::Normal(jj_id(&commit1))).as_ref()
);
assert_eq!(
view.git_refs().get("refs/remotes/origin/feature3"),
Some(RefTarget::Normal(jj_id(&commit6))).as_ref()
);
assert_eq!(
view.git_refs().get("refs/tags/v1.0"),
Some(RefTarget::Normal(jj_id(&commit5))).as_ref()
);
assert_eq!(view.git_head(), Some(&RefTarget::Normal(jj_id(&commit2))));
}
#[test]
fn test_import_refs_reimport() {
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_workspace = TestRepo::init(true);
let repo = &test_workspace.repo;
let git_repo = get_git_repo(repo);
let commit1 = empty_git_commit(&git_repo, "refs/heads/main", &[]);
git_ref(&git_repo, "refs/remotes/origin/main", commit1.id());
let commit2 = empty_git_commit(&git_repo, "refs/heads/main", &[&commit1]);
let commit3 = empty_git_commit(&git_repo, "refs/heads/feature1", &[&commit2]);
let commit4 = empty_git_commit(&git_repo, "refs/heads/feature2", &[&commit2]);
let pgp_key_oid = git_repo.blob(b"my PGP key").unwrap();
git_repo
.reference("refs/tags/my-gpg-key", pgp_key_oid, false, "")
.unwrap();
let mut tx = repo.start_transaction(&settings, "test");
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
let repo = tx.commit();
let expected_heads = hashset! {
jj_id(&commit3),
jj_id(&commit4),
};
let view = repo.view();
assert_eq!(*view.heads(), expected_heads);
// Delete feature1 and rewrite feature2
delete_git_ref(&git_repo, "refs/heads/feature1");
delete_git_ref(&git_repo, "refs/heads/feature2");
let commit5 = empty_git_commit(&git_repo, "refs/heads/feature2", &[&commit2]);
// Also modify feature2 on the jj side
let mut tx = repo.start_transaction(&settings, "test");
let commit6 = create_random_commit(tx.mut_repo(), &settings)
.set_parents(vec![jj_id(&commit2)])
.write()
.unwrap();
tx.mut_repo().set_local_branch(
"feature2".to_string(),
RefTarget::Normal(commit6.id().clone()),
);
let repo = tx.commit();
let mut tx = repo.start_transaction(&settings, "test");
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
let repo = tx.commit();
let view = repo.view();
let expected_heads = hashset! {
jj_id(&commit5),
commit6.id().clone(),
};
assert_eq!(*view.heads(), expected_heads);
assert_eq!(view.branches().len(), 2);
let commit1_target = RefTarget::Normal(jj_id(&commit1));
let commit2_target = RefTarget::Normal(jj_id(&commit2));
let expected_main_branch = BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&commit2))),
remote_targets: btreemap! {
"origin".to_string() => commit1_target.clone(),
},
};
assert_eq!(
view.branches().get("main"),
Some(expected_main_branch).as_ref()
);
let expected_feature2_branch = BranchTarget {
local_target: Some(RefTarget::Conflict {
removes: vec![jj_id(&commit4)],
adds: vec![commit6.id().clone(), jj_id(&commit5)],
}),
remote_targets: btreemap! {},
};
assert_eq!(
view.branches().get("feature2"),
Some(expected_feature2_branch).as_ref()
);
assert!(view.tags().is_empty());
assert_eq!(view.git_refs().len(), 3);
assert_eq!(
view.git_refs().get("refs/heads/main"),
Some(commit2_target).as_ref()
);
assert_eq!(
view.git_refs().get("refs/remotes/origin/main"),
Some(commit1_target).as_ref()
);
let commit5_target = RefTarget::Normal(jj_id(&commit5));
assert_eq!(
view.git_refs().get("refs/heads/feature2"),
Some(commit5_target).as_ref()
);
}
#[test]
fn test_import_refs_reimport_head_removed() {
// Test that re-importing refs doesn't cause a deleted head to come back
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_repo = TestRepo::init(true);
let repo = &test_repo.repo;
let git_repo = get_git_repo(repo);
let commit = empty_git_commit(&git_repo, "refs/heads/main", &[]);
let mut tx = repo.start_transaction(&settings, "test");
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
let commit_id = jj_id(&commit);
// Test the setup
assert!(tx.mut_repo().view().heads().contains(&commit_id));
// Remove the head and re-import
tx.mut_repo().remove_head(&commit_id);
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
assert!(!tx.mut_repo().view().heads().contains(&commit_id));
}
#[test]
fn test_import_refs_reimport_git_head_counts() {
// Test that if a branch is removed but the Git HEAD points to the commit (or a
// descendant of it), we still keep it alive.
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_repo = TestRepo::init(true);
let repo = &test_repo.repo;
let git_repo = get_git_repo(repo);
let commit = empty_git_commit(&git_repo, "refs/heads/main", &[]);
git_repo.set_head_detached(commit.id()).unwrap();
let mut tx = repo.start_transaction(&settings, "test");
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
// Delete the branch and re-import. The commit should still be there since HEAD
// points to it
git_repo
.find_reference("refs/heads/main")
.unwrap()
.delete()
.unwrap();
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
assert!(tx.mut_repo().view().heads().contains(&jj_id(&commit)));
}
#[test]
fn test_import_refs_reimport_git_head_without_ref() {
// Simulate external `git checkout` in colocated repo, from anonymous branch.
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_repo = TestRepo::init(true);
let repo = &test_repo.repo;
let git_repo = get_git_repo(repo);
// First, HEAD points to commit1.
let mut tx = repo.start_transaction(&settings, "test");
let commit1 = write_random_commit(tx.mut_repo(), &settings);
let commit2 = write_random_commit(tx.mut_repo(), &settings);
git_repo.set_head_detached(git_id(&commit1)).unwrap();
// Import HEAD.
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
assert!(tx.mut_repo().view().heads().contains(commit1.id()));
assert!(tx.mut_repo().view().heads().contains(commit2.id()));
// Move HEAD to commit2 (by e.g. `git checkout` command)
git_repo.set_head_detached(git_id(&commit2)).unwrap();
// Reimport HEAD, which doesn't abandon the old HEAD branch because jj thinks it
// would be moved by `git checkout` command. This isn't always true because the
// detached HEAD commit could be rewritten by e.g. `git commit --amend` command,
// but it should be safer than abandoning old checkout branch.
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
assert!(tx.mut_repo().view().heads().contains(commit1.id()));
assert!(tx.mut_repo().view().heads().contains(commit2.id()));
}
#[test]
fn test_import_refs_reimport_git_head_with_moved_ref() {
// Simulate external history rewriting in colocated repo.
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_repo = TestRepo::init(true);
let repo = &test_repo.repo;
let git_repo = get_git_repo(repo);
// First, both HEAD and main point to commit1.
let mut tx = repo.start_transaction(&settings, "test");
let commit1 = write_random_commit(tx.mut_repo(), &settings);
let commit2 = write_random_commit(tx.mut_repo(), &settings);
git_repo
.reference("refs/heads/main", git_id(&commit1), true, "test")
.unwrap();
git_repo.set_head_detached(git_id(&commit1)).unwrap();
// Import HEAD and main.
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
assert!(tx.mut_repo().view().heads().contains(commit1.id()));
assert!(tx.mut_repo().view().heads().contains(commit2.id()));
// Move both HEAD and main to commit2 (by e.g. `git commit --amend` command)
git_repo
.reference("refs/heads/main", git_id(&commit2), true, "test")
.unwrap();
git_repo.set_head_detached(git_id(&commit2)).unwrap();
// Reimport HEAD and main, which abandons the old main branch.
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
assert!(!tx.mut_repo().view().heads().contains(commit1.id()));
assert!(tx.mut_repo().view().heads().contains(commit2.id()));
}
#[test]
fn test_import_refs_reimport_with_deleted_remote_ref() {
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_workspace = TestRepo::init(true);
let repo = &test_workspace.repo;
let git_repo = get_git_repo(repo);
let commit_base = empty_git_commit(&git_repo, "refs/heads/main", &[]);
let commit_main = empty_git_commit(&git_repo, "refs/heads/main", &[&commit_base]);
let commit_remote_only = empty_git_commit(
&git_repo,
"refs/remotes/origin/feature-remote-only",
&[&commit_base],
);
let commit_remote_and_local = empty_git_commit(
&git_repo,
"refs/remotes/origin/feature-remote-and-local",
&[&commit_base],
);
git_ref(
&git_repo,
"refs/heads/feature-remote-and-local",
commit_remote_and_local.id(),
);
let mut tx = repo.start_transaction(&settings, "test");
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
let repo = tx.commit();
let expected_heads = hashset! {
jj_id(&commit_main),
jj_id(&commit_remote_only),
jj_id(&commit_remote_and_local),
};
let view = repo.view();
assert_eq!(*view.heads(), expected_heads);
assert_eq!(view.branches().len(), 3);
assert_eq!(
view.branches().get("feature-remote-only"),
Some(&BranchTarget {
// Even though the git repo does not have a local branch for `feature-remote-only`, jj
// creates one. This follows the model explained in docs/branches.md.
local_target: Some(RefTarget::Normal(jj_id(&commit_remote_only))),
remote_targets: btreemap! {
"origin".to_string() => RefTarget::Normal(jj_id(&commit_remote_only))
},
}),
);
assert_eq!(
view.branches().get("feature-remote-and-local"),
Some(&BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&commit_remote_and_local))),
remote_targets: btreemap! {
"origin".to_string() => RefTarget::Normal(jj_id(&commit_remote_and_local))
},
}),
);
view.branches().get("main").unwrap(); // branch #3 of 3
// Simulate fetching from a remote where feature-remote-only and
// feature-remote-and-local branches were deleted. This leads to the
// following import deleting the corresponding local branches.
delete_git_ref(&git_repo, "refs/remotes/origin/feature-remote-only");
delete_git_ref(&git_repo, "refs/remotes/origin/feature-remote-and-local");
let mut tx = repo.start_transaction(&settings, "test");
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
let repo = tx.commit();
let view = repo.view();
// The local branches were indeed deleted
assert_eq!(view.branches().len(), 1);
view.branches().get("main").unwrap(); // branch #1 of 1
assert_eq!(view.branches().get("feature-remote-local"), None);
assert_eq!(view.branches().get("feature-remote-and-local"), None);
let expected_heads = hashset! {
jj_id(&commit_main),
// Neither commit_remote_only nor commit_remote_and_local should be
// listed as a head. commit_remote_only was never affected by #864,
// but commit_remote_and_local was.
};
assert_eq!(*view.heads(), expected_heads);
}
/// This test is nearly identical to the previous one, except the branches are
/// moved sideways instead of being deleted.
#[test]
fn test_import_refs_reimport_with_moved_remote_ref() {
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_workspace = TestRepo::init(true);
let repo = &test_workspace.repo;
let git_repo = get_git_repo(repo);
let commit_base = empty_git_commit(&git_repo, "refs/heads/main", &[]);
let commit_main = empty_git_commit(&git_repo, "refs/heads/main", &[&commit_base]);
let commit_remote_only = empty_git_commit(
&git_repo,
"refs/remotes/origin/feature-remote-only",
&[&commit_base],
);
let commit_remote_and_local = empty_git_commit(
&git_repo,
"refs/remotes/origin/feature-remote-and-local",
&[&commit_base],
);
git_ref(
&git_repo,
"refs/heads/feature-remote-and-local",
commit_remote_and_local.id(),
);
let mut tx = repo.start_transaction(&settings, "test");
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
let repo = tx.commit();
let expected_heads = hashset! {
jj_id(&commit_main),
jj_id(dbg!(&commit_remote_only)),
jj_id(dbg!(&commit_remote_and_local)),
};
let view = repo.view();
assert_eq!(*view.heads(), expected_heads);
assert_eq!(view.branches().len(), 3);
assert_eq!(
view.branches().get("feature-remote-only"),
Some(&BranchTarget {
// Even though the git repo does not have a local branch for `feature-remote-only`, jj
// creates one. This follows the model explained in docs/branches.md.
local_target: Some(RefTarget::Normal(jj_id(&commit_remote_only))),
remote_targets: btreemap! {
"origin".to_string() => RefTarget::Normal(jj_id(&commit_remote_only))
},
}),
);
assert_eq!(
view.branches().get("feature-remote-and-local"),
Some(&BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&commit_remote_and_local))),
remote_targets: btreemap! {
"origin".to_string() => RefTarget::Normal(jj_id(&commit_remote_and_local))
},
}),
);
view.branches().get("main").unwrap(); // branch #3 of 3
// Simulate fetching from a remote where feature-remote-only and
// feature-remote-and-local branches were moved. This leads to the
// following import moving the corresponding local branches.
delete_git_ref(&git_repo, "refs/remotes/origin/feature-remote-only");
delete_git_ref(&git_repo, "refs/remotes/origin/feature-remote-and-local");
let new_commit_remote_only = empty_git_commit(
&git_repo,
"refs/remotes/origin/feature-remote-only",
&[&commit_base],
);
let new_commit_remote_and_local = empty_git_commit(
&git_repo,
"refs/remotes/origin/feature-remote-and-local",
&[&commit_base],
);
let mut tx = repo.start_transaction(&settings, "test");
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
let repo = tx.commit();
let view = repo.view();
assert_eq!(view.branches().len(), 3);
// The local branches are moved
assert_eq!(
view.branches().get("feature-remote-only"),
Some(&BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&new_commit_remote_only))),
remote_targets: btreemap! {
"origin".to_string() => RefTarget::Normal(jj_id(&new_commit_remote_only))
},
}),
);
assert_eq!(
view.branches().get("feature-remote-and-local"),
Some(&BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&new_commit_remote_and_local))),
remote_targets: btreemap! {
"origin".to_string() => RefTarget::Normal(jj_id(&new_commit_remote_and_local))
},
}),
);
view.branches().get("main").unwrap(); // branch #3 of 3
let expected_heads = hashset! {
jj_id(&commit_main),
jj_id(&new_commit_remote_and_local),
jj_id(&new_commit_remote_only),
// Neither commit_remote_only nor commit_remote_and_local should be
// listed as a head. commit_remote_only was never affected by #864,
// but commit_remote_and_local was.
};
assert_eq!(*view.heads(), expected_heads);
}
#[test]
fn test_import_refs_reimport_git_head_with_fixed_ref() {
// Simulate external `git checkout` in colocated repo, from named branch.
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_repo = TestRepo::init(true);
let repo = &test_repo.repo;
let git_repo = get_git_repo(repo);
// First, both HEAD and main point to commit1.
let mut tx = repo.start_transaction(&settings, "test");
let commit1 = write_random_commit(tx.mut_repo(), &settings);
let commit2 = write_random_commit(tx.mut_repo(), &settings);
git_repo
.reference("refs/heads/main", git_id(&commit1), true, "test")
.unwrap();
git_repo.set_head_detached(git_id(&commit1)).unwrap();
// Import HEAD and main.
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
assert!(tx.mut_repo().view().heads().contains(commit1.id()));
assert!(tx.mut_repo().view().heads().contains(commit2.id()));
// Move only HEAD to commit2 (by e.g. `git checkout` command)
git_repo.set_head_detached(git_id(&commit2)).unwrap();
// Reimport HEAD, which shouldn't abandon the old HEAD branch.
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
assert!(tx.mut_repo().view().heads().contains(commit1.id()));
assert!(tx.mut_repo().view().heads().contains(commit2.id()));
}
#[test]
fn test_import_refs_reimport_all_from_root_removed() {
// Test that if a chain of commits all the way from the root gets unreferenced,
// we abandon the whole stack, but not including the root commit.
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_repo = TestRepo::init(true);
let repo = &test_repo.repo;
let git_repo = get_git_repo(repo);
let commit = empty_git_commit(&git_repo, "refs/heads/main", &[]);
let mut tx = repo.start_transaction(&settings, "test");
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
// Test the setup
assert!(tx.mut_repo().view().heads().contains(&jj_id(&commit)));
// Remove all git refs and re-import
git_repo
.find_reference("refs/heads/main")
.unwrap()
.delete()
.unwrap();
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
assert!(!tx.mut_repo().view().heads().contains(&jj_id(&commit)));
}
#[test]
fn test_import_some_refs() {
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_workspace = TestRepo::init(true);
let repo = &test_workspace.repo;
let git_repo = get_git_repo(repo);
let commit_main = empty_git_commit(&git_repo, "refs/remotes/origin/main", &[]);
let commit_feat1 = empty_git_commit(&git_repo, "refs/remotes/origin/feature1", &[&commit_main]);
let commit_feat2 =
empty_git_commit(&git_repo, "refs/remotes/origin/feature2", &[&commit_feat1]);
let commit_feat3 =
empty_git_commit(&git_repo, "refs/remotes/origin/feature3", &[&commit_feat1]);
let commit_feat4 =
empty_git_commit(&git_repo, "refs/remotes/origin/feature4", &[&commit_feat3]);
let commit_ign = empty_git_commit(&git_repo, "refs/remotes/origin/ignored", &[]);
// Import branches feature1, feature2, and feature3.
let mut tx = repo.start_transaction(&settings, "test");
git::import_some_refs(tx.mut_repo(), &git_repo, &git_settings, |ref_name| {
ref_name.starts_with("refs/remotes/origin/feature")
})
.unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
let repo = tx.commit();
// There are two heads, feature2 and feature4.
let view = repo.view();
let expected_heads = hashset! {
jj_id(&commit_feat2),
jj_id(&commit_feat4),
};
assert_eq!(*view.heads(), expected_heads);
// Check that branches feature[1-4] have been locally imported and are known to
// be present on origin as well.
assert_eq!(view.branches().len(), 4);
let commit_feat1_target = RefTarget::Normal(jj_id(&commit_feat1));
let commit_feat2_target = RefTarget::Normal(jj_id(&commit_feat2));
let commit_feat3_target = RefTarget::Normal(jj_id(&commit_feat3));
let commit_feat4_target = RefTarget::Normal(jj_id(&commit_feat4));
let expected_feature1_branch = BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&commit_feat1))),
remote_targets: btreemap! { "origin".to_string() => commit_feat1_target },
};
assert_eq!(
view.branches().get("feature1"),
Some(expected_feature1_branch).as_ref()
);
let expected_feature2_branch = BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&commit_feat2))),
remote_targets: btreemap! { "origin".to_string() => commit_feat2_target },
};
assert_eq!(
view.branches().get("feature2"),
Some(expected_feature2_branch).as_ref()
);
let expected_feature3_branch = BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&commit_feat3))),
remote_targets: btreemap! { "origin".to_string() => commit_feat3_target },
};
assert_eq!(
view.branches().get("feature3"),
Some(expected_feature3_branch).as_ref()
);
let expected_feature4_branch = BranchTarget {
local_target: Some(RefTarget::Normal(jj_id(&commit_feat4))),
remote_targets: btreemap! { "origin".to_string() => commit_feat4_target },
};
assert_eq!(
view.branches().get("feature4"),
Some(expected_feature4_branch).as_ref()
);
assert_eq!(view.branches().get("main"), None,);
assert!(!view.heads().contains(&jj_id(&commit_main)));
assert_eq!(view.branches().get("ignored"), None,);
assert!(!view.heads().contains(&jj_id(&commit_ign)));
// Delete branch feature1, feature3 and feature4 in git repository and import
// branch feature2 only. That should have no impact on the jj repository.
delete_git_ref(&git_repo, "refs/remotes/origin/feature1");
delete_git_ref(&git_repo, "refs/remotes/origin/feature3");
delete_git_ref(&git_repo, "refs/remotes/origin/feature4");
let mut tx = repo.start_transaction(&settings, "test");
git::import_some_refs(tx.mut_repo(), &git_repo, &git_settings, |ref_name| {
ref_name == "refs/remotes/origin/feature2"
})
.unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
let repo = tx.commit();
// feature2 and feature4 will still be heads, and all four branches should be
// present.
let view = repo.view();
assert_eq!(view.branches().len(), 4);
assert_eq!(*view.heads(), expected_heads);
// Import feature1: this should cause the branch to be deleted, but the
// corresponding commit should stay because it is reachable from feature2.
let mut tx = repo.start_transaction(&settings, "test");
git::import_some_refs(tx.mut_repo(), &git_repo, &git_settings, |ref_name| {
ref_name == "refs/remotes/origin/feature1"
})
.unwrap();
// No descendant should be rewritten.
assert_eq!(tx.mut_repo().rebase_descendants(&settings).unwrap(), 0);
let repo = tx.commit();
// feature2 and feature4 should still be the heads, and all three branches
// feature2, feature3, and feature3 should exist.
let view = repo.view();
assert_eq!(view.branches().len(), 3);
assert_eq!(*view.heads(), expected_heads);
// Import feature3: this should cause the branch to be deleted, but
// feature4 should be left alone even though it is no longer in git.
let mut tx = repo.start_transaction(&settings, "test");
git::import_some_refs(tx.mut_repo(), &git_repo, &git_settings, |ref_name| {
ref_name == "refs/remotes/origin/feature3"
})
.unwrap();
// No descendant should be rewritten
assert_eq!(tx.mut_repo().rebase_descendants(&settings).unwrap(), 0);
let repo = tx.commit();
// feature2 and feature4 should still be the heads, and both branches
// should exist.
let view = repo.view();
assert_eq!(view.branches().len(), 2);
assert_eq!(*view.heads(), expected_heads);
// Import feature4: both the head and the branch will disappear.
let mut tx = repo.start_transaction(&settings, "test");
git::import_some_refs(tx.mut_repo(), &git_repo, &git_settings, |ref_name| {
ref_name == "refs/remotes/origin/feature4"
})
.unwrap();
// No descendant should be rewritten
assert_eq!(tx.mut_repo().rebase_descendants(&settings).unwrap(), 0);
let repo = tx.commit();
// feature2 should now be the only head and only branch.
let view = repo.view();
assert_eq!(view.branches().len(), 1);
let expected_heads = hashset! {
jj_id(&commit_feat2),
};
assert_eq!(*view.heads(), expected_heads);
}
fn git_ref(git_repo: &git2::Repository, name: &str, target: Oid) {
git_repo.reference(name, target, true, "").unwrap();
}
fn delete_git_ref(git_repo: &git2::Repository, name: &str) {
git_repo.find_reference(name).unwrap().delete().unwrap();
}
struct GitRepoData {
settings: UserSettings,
_temp_dir: TempDir,
origin_repo: git2::Repository,
git_repo: git2::Repository,
repo: Arc<ReadonlyRepo>,
}
impl GitRepoData {
fn create() -> Self {
let settings = testutils::user_settings();
let temp_dir = testutils::new_temp_dir();
let origin_repo_dir = temp_dir.path().join("source");
let origin_repo = git2::Repository::init_bare(&origin_repo_dir).unwrap();
let git_repo_dir = temp_dir.path().join("git");
let git_repo =
git2::Repository::clone(origin_repo_dir.to_str().unwrap(), &git_repo_dir).unwrap();
let jj_repo_dir = temp_dir.path().join("jj");
std::fs::create_dir(&jj_repo_dir).unwrap();
let repo = ReadonlyRepo::init(
&settings,
&jj_repo_dir,
|store_path| Box::new(GitBackend::init_external(store_path, &git_repo_dir)),
ReadonlyRepo::default_op_store_factory(),
ReadonlyRepo::default_op_heads_store_factory(),
ReadonlyRepo::default_index_store_factory(),
)
.unwrap();
Self {
settings,
_temp_dir: temp_dir,
origin_repo,
git_repo,
repo,
}
}
}
#[test]
fn test_import_refs_empty_git_repo() {
let test_data = GitRepoData::create();
let git_settings = GitSettings::default();
let heads_before = test_data.repo.view().heads().clone();
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
git::import_refs(tx.mut_repo(), &test_data.git_repo, &git_settings).unwrap();
tx.mut_repo()
.rebase_descendants(&test_data.settings)
.unwrap();
let repo = tx.commit();
assert_eq!(*repo.view().heads(), heads_before);
assert_eq!(repo.view().branches().len(), 0);
assert_eq!(repo.view().tags().len(), 0);
assert_eq!(repo.view().git_refs().len(), 0);
assert_eq!(repo.view().git_head(), None);
}
#[test]
fn test_import_refs_detached_head() {
let test_data = GitRepoData::create();
let git_settings = GitSettings::default();
let commit1 = empty_git_commit(&test_data.git_repo, "refs/heads/main", &[]);
// Delete the reference. Check that the detached HEAD commit still gets added to
// the set of heads
test_data
.git_repo
.find_reference("refs/heads/main")
.unwrap()
.delete()
.unwrap();
test_data.git_repo.set_head_detached(commit1.id()).unwrap();
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
git::import_refs(tx.mut_repo(), &test_data.git_repo, &git_settings).unwrap();
tx.mut_repo()
.rebase_descendants(&test_data.settings)
.unwrap();
let repo = tx.commit();
let expected_heads = hashset! { jj_id(&commit1) };
assert_eq!(*repo.view().heads(), expected_heads);
assert_eq!(repo.view().git_refs().len(), 0);
assert_eq!(
repo.view().git_head(),
Some(&RefTarget::Normal(jj_id(&commit1)))
);
}
#[test]
fn test_export_refs_no_detach() {
// When exporting the branch that's current checked out, don't detach HEAD if
// the target already matches
let test_data = GitRepoData::create();
let git_settings = GitSettings::default();
let git_repo = test_data.git_repo;
let commit1 = empty_git_commit(&git_repo, "refs/heads/main", &[]);
git_repo.set_head("refs/heads/main").unwrap();
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let mut_repo = tx.mut_repo();
git::import_refs(mut_repo, &git_repo, &git_settings).unwrap();
mut_repo.rebase_descendants(&test_data.settings).unwrap();
// Do an initial export to make sure `main` is considered
assert_eq!(git::export_refs(mut_repo, &git_repo), Ok(vec![]));
assert_eq!(
mut_repo.get_git_ref("refs/heads/main"),
Some(RefTarget::Normal(jj_id(&commit1)))
);
assert_eq!(git_repo.head().unwrap().name(), Some("refs/heads/main"));
assert_eq!(
git_repo.find_reference("refs/heads/main").unwrap().target(),
Some(commit1.id())
);
}
#[test]
fn test_export_refs_branch_changed() {
// We can export a change to a branch
let test_data = GitRepoData::create();
let git_settings = GitSettings::default();
let git_repo = test_data.git_repo;
let commit = empty_git_commit(&git_repo, "refs/heads/main", &[]);
git_repo
.reference("refs/heads/feature", commit.id(), false, "test")
.unwrap();
git_repo.set_head("refs/heads/feature").unwrap();
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let mut_repo = tx.mut_repo();
git::import_refs(mut_repo, &git_repo, &git_settings).unwrap();
mut_repo.rebase_descendants(&test_data.settings).unwrap();
assert_eq!(git::export_refs(mut_repo, &git_repo), Ok(vec![]));
let new_commit = create_random_commit(mut_repo, &test_data.settings)
.set_parents(vec![jj_id(&commit)])
.write()
.unwrap();
mut_repo.set_local_branch(
"main".to_string(),
RefTarget::Normal(new_commit.id().clone()),
);
assert_eq!(git::export_refs(mut_repo, &git_repo), Ok(vec![]));
assert_eq!(
mut_repo.get_git_ref("refs/heads/main"),
Some(RefTarget::Normal(new_commit.id().clone()))
);
assert_eq!(
git_repo
.find_reference("refs/heads/main")
.unwrap()
.peel_to_commit()
.unwrap()
.id(),
git_id(&new_commit)
);
// HEAD should be unchanged since its target branch didn't change
assert_eq!(git_repo.head().unwrap().name(), Some("refs/heads/feature"));
}
#[test]
fn test_export_refs_current_branch_changed() {
// If we update a branch that is checked out in the git repo, HEAD gets detached
let test_data = GitRepoData::create();
let git_settings = GitSettings::default();
let git_repo = test_data.git_repo;
let commit1 = empty_git_commit(&git_repo, "refs/heads/main", &[]);
git_repo.set_head("refs/heads/main").unwrap();
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let mut_repo = tx.mut_repo();
git::import_refs(mut_repo, &git_repo, &git_settings).unwrap();
mut_repo.rebase_descendants(&test_data.settings).unwrap();
assert_eq!(git::export_refs(mut_repo, &git_repo), Ok(vec![]));
let new_commit = create_random_commit(mut_repo, &test_data.settings)
.set_parents(vec![jj_id(&commit1)])
.write()
.unwrap();
mut_repo.set_local_branch(
"main".to_string(),
RefTarget::Normal(new_commit.id().clone()),
);
assert_eq!(git::export_refs(mut_repo, &git_repo), Ok(vec![]));
assert_eq!(
mut_repo.get_git_ref("refs/heads/main"),
Some(RefTarget::Normal(new_commit.id().clone()))
);
assert_eq!(
git_repo
.find_reference("refs/heads/main")
.unwrap()
.peel_to_commit()
.unwrap()
.id(),
git_id(&new_commit)
);
assert!(git_repo.head_detached().unwrap());
}
#[test]
fn test_export_refs_unborn_git_branch() {
// Can export to an empty Git repo (we can handle Git's "unborn branch" state)
let test_data = GitRepoData::create();
let git_settings = GitSettings::default();
let git_repo = test_data.git_repo;
git_repo.set_head("refs/heads/main").unwrap();
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let mut_repo = tx.mut_repo();
git::import_refs(mut_repo, &git_repo, &git_settings).unwrap();
mut_repo.rebase_descendants(&test_data.settings).unwrap();
assert_eq!(git::export_refs(mut_repo, &git_repo), Ok(vec![]));
let new_commit = write_random_commit(mut_repo, &test_data.settings);
mut_repo.set_local_branch(
"main".to_string(),
RefTarget::Normal(new_commit.id().clone()),
);
assert_eq!(git::export_refs(mut_repo, &git_repo), Ok(vec![]));
assert_eq!(
mut_repo.get_git_ref("refs/heads/main"),
Some(RefTarget::Normal(new_commit.id().clone()))
);
assert_eq!(
git_repo
.find_reference("refs/heads/main")
.unwrap()
.peel_to_commit()
.unwrap()
.id(),
git_id(&new_commit)
);
// It's weird that the head is still pointing to refs/heads/main, but
// it doesn't seem that Git lets you be on an "unborn branch" while
// also being in a "detached HEAD" state.
assert!(!git_repo.head_detached().unwrap());
}
#[test]
fn test_export_import_sequence() {
// Import a branch pointing to A, modify it in jj to point to B, export it,
// modify it in git to point to C, then import it again. There should be no
// conflict.
let test_data = GitRepoData::create();
let git_settings = GitSettings::default();
let git_repo = test_data.git_repo;
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let mut_repo = tx.mut_repo();
let commit_a = write_random_commit(mut_repo, &test_data.settings);
let commit_b = write_random_commit(mut_repo, &test_data.settings);
let commit_c = write_random_commit(mut_repo, &test_data.settings);
// Import the branch pointing to A
git_repo
.reference("refs/heads/main", git_id(&commit_a), true, "test")
.unwrap();
git::import_refs(mut_repo, &git_repo, &git_settings).unwrap();
assert_eq!(
mut_repo.get_git_ref("refs/heads/main"),
Some(RefTarget::Normal(commit_a.id().clone()))
);
// Modify the branch in jj to point to B
mut_repo.set_local_branch("main".to_string(), RefTarget::Normal(commit_b.id().clone()));
// Export the branch to git
assert_eq!(git::export_refs(mut_repo, &git_repo), Ok(vec![]));
assert_eq!(
mut_repo.get_git_ref("refs/heads/main"),
Some(RefTarget::Normal(commit_b.id().clone()))
);
// Modify the branch in git to point to C
git_repo
.reference("refs/heads/main", git_id(&commit_c), true, "test")
.unwrap();
// Import from git
git::import_refs(mut_repo, &git_repo, &git_settings).unwrap();
assert_eq!(
mut_repo.get_git_ref("refs/heads/main"),
Some(RefTarget::Normal(commit_c.id().clone()))
);
assert_eq!(
mut_repo.view().get_local_branch("main"),
Some(RefTarget::Normal(commit_c.id().clone()))
);
}
#[test]
fn test_import_export_no_auto_local_branch() {
// Import a remote tracking branch and export it. We should not create a git
// branch.
let test_data = GitRepoData::create();
let git_settings = GitSettings {
auto_local_branch: false,
};
let git_repo = test_data.git_repo;
let git_commit = empty_git_commit(&git_repo, "refs/remotes/origin/main", &[]);
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let mut_repo = tx.mut_repo();
git::import_refs(mut_repo, &git_repo, &git_settings).unwrap();
let expected_branch = BranchTarget {
local_target: None,
remote_targets: btreemap! {
"origin".to_string() => RefTarget::Normal(jj_id(&git_commit))
},
};
assert_eq!(
mut_repo.view().branches().get("main"),
Some(expected_branch).as_ref()
);
assert_eq!(
mut_repo.get_git_ref("refs/remotes/origin/main"),
Some(RefTarget::Normal(jj_id(&git_commit)))
);
// Export the branch to git
assert_eq!(git::export_refs(mut_repo, &git_repo), Ok(vec![]));
assert_eq!(mut_repo.get_git_ref("refs/heads/main"), None);
}
#[test]
fn test_export_conflicts() {
// We skip export of conflicted branches
let test_data = GitRepoData::create();
let git_repo = test_data.git_repo;
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let mut_repo = tx.mut_repo();
let commit_a = write_random_commit(mut_repo, &test_data.settings);
let commit_b = write_random_commit(mut_repo, &test_data.settings);
let commit_c = write_random_commit(mut_repo, &test_data.settings);
mut_repo.set_local_branch("main".to_string(), RefTarget::Normal(commit_a.id().clone()));
mut_repo.set_local_branch(
"feature".to_string(),
RefTarget::Normal(commit_a.id().clone()),
);
assert_eq!(git::export_refs(mut_repo, &git_repo), Ok(vec![]));
// Create a conflict and export. It should not be exported, but other changes
// should be.
mut_repo.set_local_branch("main".to_string(), RefTarget::Normal(commit_b.id().clone()));
mut_repo.set_local_branch(
"feature".to_string(),
RefTarget::Conflict {
removes: vec![commit_a.id().clone()],
adds: vec![commit_b.id().clone(), commit_c.id().clone()],
},
);
assert_eq!(git::export_refs(mut_repo, &git_repo), Ok(vec![]));
assert_eq!(
git_repo
.find_reference("refs/heads/feature")
.unwrap()
.target()
.unwrap(),
git_id(&commit_a)
);
assert_eq!(
git_repo
.find_reference("refs/heads/main")
.unwrap()
.target()
.unwrap(),
git_id(&commit_b)
);
}
#[test]
fn test_export_partial_failure() {
// Check that we skip branches that fail to export
let test_data = GitRepoData::create();
let git_repo = test_data.git_repo;
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let mut_repo = tx.mut_repo();
let commit_a = write_random_commit(mut_repo, &test_data.settings);
let target = RefTarget::Normal(commit_a.id().clone());
// Empty string is disallowed by Git
mut_repo.set_local_branch("".to_string(), target.clone());
mut_repo.set_local_branch("main".to_string(), target.clone());
// `main/sub` will conflict with `main` in Git, at least when using loose ref
// storage
mut_repo.set_local_branch("main/sub".to_string(), target);
assert_eq!(
git::export_refs(mut_repo, &git_repo),
Ok(vec!["".to_string(), "main/sub".to_string()])
);
// The `main` branch should have succeeded but the other should have failed
assert!(git_repo.find_reference("refs/heads/").is_err());
assert_eq!(
git_repo
.find_reference("refs/heads/main")
.unwrap()
.target()
.unwrap(),
git_id(&commit_a)
);
assert!(git_repo.find_reference("refs/heads/main/sub").is_err());
// Now remove the `main` branch and make sure that the `main/sub` gets exported
// even though it didn't change
mut_repo.remove_local_branch("main");
assert_eq!(
git::export_refs(mut_repo, &git_repo),
Ok(vec!["".to_string()])
);
assert!(git_repo.find_reference("refs/heads/").is_err());
assert!(git_repo.find_reference("refs/heads/main").is_err());
assert_eq!(
git_repo
.find_reference("refs/heads/main/sub")
.unwrap()
.target()
.unwrap(),
git_id(&commit_a)
);
}
#[test]
fn test_export_reexport_transitions() {
// Test exporting after making changes on the jj side, or the git side, or both
let test_data = GitRepoData::create();
let git_repo = test_data.git_repo;
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let mut_repo = tx.mut_repo();
let commit_a = write_random_commit(mut_repo, &test_data.settings);
let commit_b = write_random_commit(mut_repo, &test_data.settings);
let commit_c = write_random_commit(mut_repo, &test_data.settings);
// Create a few branches whose names indicate how they change in jj in git. The
// first letter represents the branch's target in the last export. The second
// letter represents the branch's target in jj. The third letter represents the
// branch's target in git. "X" means that the branch doesn't exist. "A", "B", or
// "C" means that the branch points to that commit.
//
// AAB: Branch modified in git
// AAX: Branch deleted in git
// ABA: Branch modified in jj
// ABB: Branch modified in both jj and git, pointing to same target
// ABC: Branch modified in both jj and git, pointing to different targets
// ABX: Branch modified in jj, deleted in git
// AXA: Branch deleted in jj
// AXB: Branch deleted in jj, modified in git
// AXX: Branch deleted in both jj and git
// XAA: Branch added in both jj and git, pointing to same target
// XAB: Branch added in both jj and git, pointing to different targets
// XAX: Branch added in jj
// XXA: Branch added in git
// Create initial state and export it
for branch in [
"AAB", "AAX", "ABA", "ABB", "ABC", "ABX", "AXA", "AXB", "AXX",
] {
mut_repo.set_local_branch(branch.to_string(), RefTarget::Normal(commit_a.id().clone()));
}
assert_eq!(git::export_refs(mut_repo, &git_repo), Ok(vec![]));
// Make changes on the jj side
for branch in ["AXA", "AXB", "AXX"] {
mut_repo.remove_local_branch(branch);
}
for branch in ["XAA", "XAB", "XAX"] {
mut_repo.set_local_branch(branch.to_string(), RefTarget::Normal(commit_a.id().clone()));
}
for branch in ["ABA", "ABB", "ABC", "ABX"] {
mut_repo.set_local_branch(branch.to_string(), RefTarget::Normal(commit_b.id().clone()));
}
// Make changes on the git side
for branch in ["AAX", "ABX", "AXX"] {
git_repo
.find_reference(&format!("refs/heads/{branch}"))
.unwrap()
.delete()
.unwrap();
}
for branch in ["XAA", "XXA"] {
git_repo
.reference(&format!("refs/heads/{branch}"), git_id(&commit_a), true, "")
.unwrap();
}
for branch in ["AAB", "ABB", "AXB", "XAB"] {
git_repo
.reference(&format!("refs/heads/{branch}"), git_id(&commit_b), true, "")
.unwrap();
}
let branch = "ABC";
git_repo
.reference(&format!("refs/heads/{branch}"), git_id(&commit_c), true, "")
.unwrap();
// TODO: The branches that we made conflicting changes to should have failed to
// export. They should have been unchanged in git and in
// mut_repo.view().git_refs().
assert_eq!(
git::export_refs(mut_repo, &git_repo),
Ok(["AXB", "ABC", "ABX", "XAB"]
.into_iter()
.map(String::from)
.collect_vec())
);
for branch in ["AAX", "ABX", "AXA", "AXX"] {
assert!(
git_repo
.find_reference(&format!("refs/heads/{branch}"))
.is_err(),
"{branch} should not exist"
);
}
for branch in ["XAA", "XAX", "XXA"] {
assert_eq!(
git_repo
.find_reference(&format!("refs/heads/{branch}"))
.unwrap()
.target(),
Some(git_id(&commit_a)),
"{branch} should point to commit A"
);
}
for branch in ["AAB", "ABA", "AAB", "ABB", "AXB", "XAB"] {
assert_eq!(
git_repo
.find_reference(&format!("refs/heads/{branch}"))
.unwrap()
.target(),
Some(git_id(&commit_b)),
"{branch} should point to commit B"
);
}
let branch = "ABC";
assert_eq!(
git_repo
.find_reference(&format!("refs/heads/{branch}"))
.unwrap()
.target(),
Some(git_id(&commit_c)),
"{branch} should point to commit C"
);
assert_eq!(
*mut_repo.view().git_refs(),
btreemap! {
"refs/heads/AAX".to_string() => RefTarget::Normal(commit_a.id().clone()),
"refs/heads/AAB".to_string() => RefTarget::Normal(commit_a.id().clone()),
"refs/heads/ABA".to_string() => RefTarget::Normal(commit_b.id().clone()),
"refs/heads/ABB".to_string() => RefTarget::Normal(commit_b.id().clone()),
"refs/heads/ABC".to_string() => RefTarget::Normal(commit_a.id().clone()),
"refs/heads/ABX".to_string() => RefTarget::Normal(commit_a.id().clone()),
"refs/heads/AXB".to_string() => RefTarget::Normal(commit_a.id().clone()),
"refs/heads/XAA".to_string() => RefTarget::Normal(commit_a.id().clone()),
"refs/heads/XAX".to_string() => RefTarget::Normal(commit_a.id().clone()),
}
);
}
#[test]
fn test_init() {
let settings = testutils::user_settings();
let temp_dir = testutils::new_temp_dir();
let git_repo_dir = temp_dir.path().join("git");
let jj_repo_dir = temp_dir.path().join("jj");
let git_repo = git2::Repository::init_bare(&git_repo_dir).unwrap();
let initial_git_commit = empty_git_commit(&git_repo, "refs/heads/main", &[]);
std::fs::create_dir(&jj_repo_dir).unwrap();
let repo = ReadonlyRepo::init(
&settings,
&jj_repo_dir,
|store_path| Box::new(GitBackend::init_external(store_path, &git_repo_dir)),
ReadonlyRepo::default_op_store_factory(),
ReadonlyRepo::default_op_heads_store_factory(),
ReadonlyRepo::default_index_store_factory(),
)
.unwrap();
// The refs were *not* imported -- it's the caller's responsibility to import
// any refs they care about.
assert!(!repo.view().heads().contains(&jj_id(&initial_git_commit)));
}
#[test]
fn test_fetch_empty_repo() {
let test_data = GitRepoData::create();
let git_settings = GitSettings::default();
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let default_branch = git::fetch(
tx.mut_repo(),
&test_data.git_repo,
"origin",
None,
git::RemoteCallbacks::default(),
&git_settings,
)
.unwrap();
// No default branch and no refs
assert_eq!(default_branch, None);
assert_eq!(*tx.mut_repo().view().git_refs(), btreemap! {});
assert_eq!(*tx.mut_repo().view().branches(), btreemap! {});
}
#[test]
fn test_fetch_initial_commit() {
let test_data = GitRepoData::create();
let git_settings = GitSettings::default();
let initial_git_commit = empty_git_commit(&test_data.origin_repo, "refs/heads/main", &[]);
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let default_branch = git::fetch(
tx.mut_repo(),
&test_data.git_repo,
"origin",
None,
git::RemoteCallbacks::default(),
&git_settings,
)
.unwrap();
// No default branch because the origin repo's HEAD wasn't set
assert_eq!(default_branch, None);
let repo = tx.commit();
// The initial commit is visible after git::fetch().
let view = repo.view();
assert!(view.heads().contains(&jj_id(&initial_git_commit)));
let initial_commit_target = RefTarget::Normal(jj_id(&initial_git_commit));
assert_eq!(
*view.git_refs(),
btreemap! {
"refs/remotes/origin/main".to_string() => initial_commit_target.clone(),
}
);
assert_eq!(
*view.branches(),
btreemap! {
"main".to_string() => BranchTarget {
local_target: Some(initial_commit_target.clone()),
remote_targets: btreemap! {"origin".to_string() => initial_commit_target}
},
}
);
}
#[test]
fn test_fetch_success() {
let mut test_data = GitRepoData::create();
let git_settings = GitSettings::default();
let initial_git_commit = empty_git_commit(&test_data.origin_repo, "refs/heads/main", &[]);
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
git::fetch(
tx.mut_repo(),
&test_data.git_repo,
"origin",
None,
git::RemoteCallbacks::default(),
&git_settings,
)
.unwrap();
test_data.repo = tx.commit();
test_data.origin_repo.set_head("refs/heads/main").unwrap();
let new_git_commit = empty_git_commit(
&test_data.origin_repo,
"refs/heads/main",
&[&initial_git_commit],
);
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let default_branch = git::fetch(
tx.mut_repo(),
&test_data.git_repo,
"origin",
None,
git::RemoteCallbacks::default(),
&git_settings,
)
.unwrap();
// The default branch is "main"
assert_eq!(default_branch, Some("main".to_string()));
let repo = tx.commit();
// The new commit is visible after we fetch again
let view = repo.view();
assert!(view.heads().contains(&jj_id(&new_git_commit)));
let new_commit_target = RefTarget::Normal(jj_id(&new_git_commit));
assert_eq!(
*view.git_refs(),
btreemap! {
"refs/remotes/origin/main".to_string() => new_commit_target.clone(),
}
);
assert_eq!(
*view.branches(),
btreemap! {
"main".to_string() => BranchTarget {
local_target: Some(new_commit_target.clone()),
remote_targets: btreemap! {"origin".to_string() => new_commit_target}
},
}
);
}
#[test]
fn test_fetch_prune_deleted_ref() {
let test_data = GitRepoData::create();
let git_settings = GitSettings::default();
empty_git_commit(&test_data.git_repo, "refs/heads/main", &[]);
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
git::fetch(
tx.mut_repo(),
&test_data.git_repo,
"origin",
None,
git::RemoteCallbacks::default(),
&git_settings,
)
.unwrap();
// Test the setup
assert!(tx.mut_repo().get_branch("main").is_some());
test_data
.git_repo
.find_reference("refs/heads/main")
.unwrap()
.delete()
.unwrap();
// After re-fetching, the branch should be deleted
git::fetch(
tx.mut_repo(),
&test_data.git_repo,
"origin",
None,
git::RemoteCallbacks::default(),
&git_settings,
)
.unwrap();
assert!(tx.mut_repo().get_branch("main").is_none());
}
#[test]
fn test_fetch_no_default_branch() {
let test_data = GitRepoData::create();
let git_settings = GitSettings::default();
let initial_git_commit = empty_git_commit(&test_data.origin_repo, "refs/heads/main", &[]);
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
git::fetch(
tx.mut_repo(),
&test_data.git_repo,
"origin",
None,
git::RemoteCallbacks::default(),
&git_settings,
)
.unwrap();
empty_git_commit(
&test_data.origin_repo,
"refs/heads/main",
&[&initial_git_commit],
);
// It's actually not enough to have a detached HEAD, it also needs to point to a
// commit without a branch (that's possibly a bug in Git *and* libgit2), so
// we point it to initial_git_commit.
test_data
.origin_repo
.set_head_detached(initial_git_commit.id())
.unwrap();
let default_branch = git::fetch(
tx.mut_repo(),
&test_data.git_repo,
"origin",
None,
git::RemoteCallbacks::default(),
&git_settings,
)
.unwrap();
// There is no default branch
assert_eq!(default_branch, None);
}
#[test]
fn test_fetch_no_such_remote() {
let test_data = GitRepoData::create();
let git_settings = GitSettings::default();
let mut tx = test_data
.repo
.start_transaction(&test_data.settings, "test");
let result = git::fetch(
tx.mut_repo(),
&test_data.git_repo,
"invalid-remote",
None,
git::RemoteCallbacks::default(),
&git_settings,
);
assert!(matches!(result, Err(GitFetchError::NoSuchRemote(_))));
}
struct PushTestSetup {
source_repo_dir: PathBuf,
jj_repo: Arc<ReadonlyRepo>,
new_commit: Commit,
}
fn set_up_push_repos(settings: &UserSettings, temp_dir: &TempDir) -> PushTestSetup {
let source_repo_dir = temp_dir.path().join("source");
let clone_repo_dir = temp_dir.path().join("clone");
let jj_repo_dir = temp_dir.path().join("jj");
let source_repo = git2::Repository::init_bare(&source_repo_dir).unwrap();
let initial_git_commit = empty_git_commit(&source_repo, "refs/heads/main", &[]);
git2::Repository::clone(source_repo_dir.to_str().unwrap(), &clone_repo_dir).unwrap();
std::fs::create_dir(&jj_repo_dir).unwrap();
let jj_repo = ReadonlyRepo::init(
settings,
&jj_repo_dir,
|store_path| Box::new(GitBackend::init_external(store_path, &clone_repo_dir)),
ReadonlyRepo::default_op_store_factory(),
ReadonlyRepo::default_op_heads_store_factory(),
ReadonlyRepo::default_index_store_factory(),
)
.unwrap();
let mut tx = jj_repo.start_transaction(settings, "test");
let new_commit = create_random_commit(tx.mut_repo(), settings)
.set_parents(vec![jj_id(&initial_git_commit)])
.write()
.unwrap();
let jj_repo = tx.commit();
PushTestSetup {
source_repo_dir,
jj_repo,
new_commit,
}
}
#[test]
fn test_push_updates_success() {
let settings = testutils::user_settings();
let temp_dir = testutils::new_temp_dir();
let setup = set_up_push_repos(&settings, &temp_dir);
let clone_repo = get_git_repo(&setup.jj_repo);
let result = git::push_updates(
&clone_repo,
"origin",
&[GitRefUpdate {
qualified_name: "refs/heads/main".to_string(),
force: false,
new_target: Some(setup.new_commit.id().clone()),
}],
git::RemoteCallbacks::default(),
);
assert_eq!(result, Ok(()));
// Check that the ref got updated in the source repo
let source_repo = git2::Repository::open(&setup.source_repo_dir).unwrap();
let new_target = source_repo
.find_reference("refs/heads/main")
.unwrap()
.target();
let new_oid = git_id(&setup.new_commit);
assert_eq!(new_target, Some(new_oid));
// Check that the ref got updated in the cloned repo. This just tests our
// assumptions about libgit2 because we want the refs/remotes/origin/main
// branch to be updated.
let new_target = clone_repo
.find_reference("refs/remotes/origin/main")
.unwrap()
.target();
assert_eq!(new_target, Some(new_oid));
}
#[test]
fn test_push_updates_deletion() {
let settings = testutils::user_settings();
let temp_dir = testutils::new_temp_dir();
let setup = set_up_push_repos(&settings, &temp_dir);
let clone_repo = get_git_repo(&setup.jj_repo);
let source_repo = git2::Repository::open(&setup.source_repo_dir).unwrap();
// Test the setup
assert!(source_repo.find_reference("refs/heads/main").is_ok());
let result = git::push_updates(
&get_git_repo(&setup.jj_repo),
"origin",
&[GitRefUpdate {
qualified_name: "refs/heads/main".to_string(),
force: false,
new_target: None,
}],
git::RemoteCallbacks::default(),
);
assert_eq!(result, Ok(()));
// Check that the ref got deleted in the source repo
assert!(source_repo.find_reference("refs/heads/main").is_err());
// Check that the ref got deleted in the cloned repo. This just tests our
// assumptions about libgit2 because we want the refs/remotes/origin/main
// branch to be deleted.
assert!(clone_repo
.find_reference("refs/remotes/origin/main")
.is_err());
}
#[test]
fn test_push_updates_mixed_deletion_and_addition() {
let settings = testutils::user_settings();
let temp_dir = testutils::new_temp_dir();
let setup = set_up_push_repos(&settings, &temp_dir);
let clone_repo = get_git_repo(&setup.jj_repo);
let result = git::push_updates(
&clone_repo,
"origin",
&[
GitRefUpdate {
qualified_name: "refs/heads/main".to_string(),
force: false,
new_target: None,
},
GitRefUpdate {
qualified_name: "refs/heads/topic".to_string(),
force: false,
new_target: Some(setup.new_commit.id().clone()),
},
],
git::RemoteCallbacks::default(),
);
assert_eq!(result, Ok(()));
// Check that the topic ref got updated in the source repo
let source_repo = git2::Repository::open(&setup.source_repo_dir).unwrap();
let new_target = source_repo
.find_reference("refs/heads/topic")
.unwrap()
.target();
assert_eq!(new_target, Some(git_id(&setup.new_commit)));
// Check that the main ref got deleted in the source repo
assert!(source_repo.find_reference("refs/heads/main").is_err());
}
#[test]
fn test_push_updates_not_fast_forward() {
let settings = testutils::user_settings();
let temp_dir = testutils::new_temp_dir();
let mut setup = set_up_push_repos(&settings, &temp_dir);
let mut tx = setup.jj_repo.start_transaction(&settings, "test");
let new_commit = write_random_commit(tx.mut_repo(), &settings);
setup.jj_repo = tx.commit();
let result = git::push_updates(
&get_git_repo(&setup.jj_repo),
"origin",
&[GitRefUpdate {
qualified_name: "refs/heads/main".to_string(),
force: false,
new_target: Some(new_commit.id().clone()),
}],
git::RemoteCallbacks::default(),
);
assert_eq!(result, Err(GitPushError::NotFastForward));
}
#[test]
fn test_push_updates_not_fast_forward_with_force() {
let settings = testutils::user_settings();
let temp_dir = testutils::new_temp_dir();
let mut setup = set_up_push_repos(&settings, &temp_dir);
let mut tx = setup.jj_repo.start_transaction(&settings, "test");
let new_commit = write_random_commit(tx.mut_repo(), &settings);
setup.jj_repo = tx.commit();
let result = git::push_updates(
&get_git_repo(&setup.jj_repo),
"origin",
&[GitRefUpdate {
qualified_name: "refs/heads/main".to_string(),
force: true,
new_target: Some(new_commit.id().clone()),
}],
git::RemoteCallbacks::default(),
);
assert_eq!(result, Ok(()));
// Check that the ref got updated in the source repo
let source_repo = git2::Repository::open(&setup.source_repo_dir).unwrap();
let new_target = source_repo
.find_reference("refs/heads/main")
.unwrap()
.target();
assert_eq!(new_target, Some(git_id(&new_commit)));
}
#[test]
fn test_push_updates_no_such_remote() {
let settings = testutils::user_settings();
let temp_dir = testutils::new_temp_dir();
let setup = set_up_push_repos(&settings, &temp_dir);
let result = git::push_updates(
&get_git_repo(&setup.jj_repo),
"invalid-remote",
&[GitRefUpdate {
qualified_name: "refs/heads/main".to_string(),
force: false,
new_target: Some(setup.new_commit.id().clone()),
}],
git::RemoteCallbacks::default(),
);
assert!(matches!(result, Err(GitPushError::NoSuchRemote(_))));
}
#[test]
fn test_push_updates_invalid_remote() {
let settings = testutils::user_settings();
let temp_dir = testutils::new_temp_dir();
let setup = set_up_push_repos(&settings, &temp_dir);
let result = git::push_updates(
&get_git_repo(&setup.jj_repo),
"http://invalid-remote",
&[GitRefUpdate {
qualified_name: "refs/heads/main".to_string(),
force: false,
new_target: Some(setup.new_commit.id().clone()),
}],
git::RemoteCallbacks::default(),
);
assert!(matches!(result, Err(GitPushError::NoSuchRemote(_))));
}
#[test]
fn test_bulk_update_extra_on_import_refs() {
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_repo = TestRepo::init(true);
let repo = &test_repo.repo;
let git_repo = get_git_repo(repo);
let count_extra_tables = || {
let extra_dir = repo.repo_path().join("store").join("extra");
extra_dir
.read_dir()
.unwrap()
.filter(|entry| entry.as_ref().unwrap().metadata().unwrap().is_file())
.count()
};
let import_refs = |repo: &Arc<ReadonlyRepo>| {
let mut tx = repo.start_transaction(&settings, "test");
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
tx.commit()
};
// Extra metadata table shouldn't be created per read_commit() call. The number
// of the table files should be way smaller than the number of the heads.
let mut commit = empty_git_commit(&git_repo, "refs/heads/main", &[]);
for _ in 1..10 {
commit = empty_git_commit(&git_repo, "refs/heads/main", &[&commit]);
}
let repo = import_refs(repo);
assert_eq!(count_extra_tables(), 2); // empty + imported_heads == 2
// Noop import shouldn't create a table file.
let repo = import_refs(&repo);
assert_eq!(count_extra_tables(), 2);
// Importing new head should add exactly one table file.
for _ in 0..10 {
commit = empty_git_commit(&git_repo, "refs/heads/main", &[&commit]);
}
let repo = import_refs(&repo);
assert_eq!(count_extra_tables(), 3);
drop(repo); // silence clippy
}
#[test]
fn test_rewrite_imported_commit() {
let settings = testutils::user_settings();
let git_settings = GitSettings::default();
let test_repo = TestRepo::init(true);
let repo = &test_repo.repo;
let git_repo = get_git_repo(repo);
// Import git commit, which generates change id from the commit id.
let git_commit = empty_git_commit(&git_repo, "refs/heads/main", &[]);
let mut tx = repo.start_transaction(&settings, "test");
git::import_refs(tx.mut_repo(), &git_repo, &git_settings).unwrap();
tx.mut_repo().rebase_descendants(&settings).unwrap();
let repo = tx.commit();
let imported_commit = repo.store().get_commit(&jj_id(&git_commit)).unwrap();
// Try to create identical commit with different change id.
let mut tx = repo.start_transaction(&settings, "test");
let authored_commit = tx
.mut_repo()
.new_commit(
&settings,
imported_commit.parent_ids().to_vec(),
imported_commit.tree_id().clone(),
)
.set_author(imported_commit.author().clone())
.set_committer(imported_commit.committer().clone())
.set_description(imported_commit.description())
.write()
.unwrap();
let repo = tx.commit();
// Imported commit shouldn't be reused, and the timestamp of the authored
// commit should be adjusted to create new commit.
assert_ne!(imported_commit.id(), authored_commit.id());
assert_ne!(
imported_commit.committer().timestamp,
authored_commit.committer().timestamp,
);
// The index should be consistent with the store.
assert_eq!(
repo.resolve_change_id(imported_commit.change_id()),
Some(vec![imported_commit.id().clone()]),
);
assert_eq!(
repo.resolve_change_id(authored_commit.change_id()),
Some(vec![authored_commit.id().clone()]),
);
}
#[test]
fn test_concurrent_write_commit() {
let settings = &testutils::user_settings();
let test_repo = TestRepo::init(true);
let repo = &test_repo.repo;
// Try to create identical commits with different change ids. Timestamp of the
// commits should be adjusted such that each commit has a unique commit id.
let num_thread = 8;
let (sender, receiver) = mpsc::channel();
thread::scope(|s| {
let barrier = Arc::new(Barrier::new(num_thread));
for i in 0..num_thread {
let repo = load_repo_at_head(settings, repo.repo_path()); // unshare loader
let barrier = barrier.clone();
let sender = sender.clone();
s.spawn(move || {
barrier.wait();
let mut tx = repo.start_transaction(settings, &format!("writer {i}"));
let commit = create_rooted_commit(tx.mut_repo(), settings)
.set_description("racy commit")
.write()
.unwrap();
tx.commit();
sender
.send((commit.id().clone(), commit.change_id().clone()))
.unwrap();
});
}
});
drop(sender);
let mut commit_change_ids: BTreeMap<CommitId, HashSet<ChangeId>> = BTreeMap::new();
for (commit_id, change_id) in receiver {
commit_change_ids
.entry(commit_id)
.or_default()
.insert(change_id);
}
// Ideally, each commit should have unique commit/change ids.
assert_eq!(commit_change_ids.len(), num_thread);
// All unique commits should be preserved.
let repo = repo.reload_at_head(settings).unwrap();
for (commit_id, change_ids) in &commit_change_ids {
let commit = repo.store().get_commit(commit_id).unwrap();
assert_eq!(commit.id(), commit_id);
assert!(change_ids.contains(commit.change_id()));
}
// The index should be consistent with the store.
for commit_id in commit_change_ids.keys() {
assert!(repo.index().has_id(commit_id));
let commit = repo.store().get_commit(commit_id).unwrap();
assert_eq!(
repo.resolve_change_id(commit.change_id()),
Some(vec![commit_id.clone()]),
);
}
}
#[test]
fn test_concurrent_read_write_commit() {
let settings = &testutils::user_settings();
let test_repo = TestRepo::init(true);
let repo = &test_repo.repo;
// Create unique commits and load them concurrently. In this test, we assume
// that writer doesn't fall back to timestamp adjustment, so the expected
// commit ids are static. If reader could interrupt in the timestamp
// adjustment loop, this assumption wouldn't apply.
let commit_ids = [
"c5c6efd6ac240102e7f047234c3cade55eedd621",
"9f7a96a6c9d044b228f3321a365bdd3514e6033a",
"aa7867ad0c566df5bbb708d8d6ddc88eefeea0ff",
"930a76e333d5cc17f40a649c3470cb99aae24a0c",
"88e9a719df4f0cc3daa740b814e271341f6ea9f4",
"4883bdc57448a53b4eef1af85e34b85b9ee31aee",
"308345f8d058848e83beed166704faac2ecd4541",
"9e35ff61ea8d1d4ef7f01edc5fd23873cc301b30",
"8010ac8c65548dd619e7c83551d983d724dda216",
"bbe593d556ea31acf778465227f340af7e627b2b",
"2f6800f4b8e8fc4c42dc0e417896463d13673654",
"a3a7e4fcddeaa11bb84f66f3428f107f65eb3268",
"96e17ff3a7ee1b67ddfa5619b2bf5380b80f619a",
"34613f7609524c54cc990ada1bdef3dcad0fd29f",
"95867e5aed6b62abc2cd6258da9fee8873accfd3",
"7635ce107ae7ba71821b8cd74a1405ca6d9e49ac",
]
.into_iter()
.map(CommitId::from_hex)
.collect_vec();
let num_reader_thread = 8;
thread::scope(|s| {
let barrier = Arc::new(Barrier::new(commit_ids.len() + num_reader_thread));
// Writer assigns random change id
for (i, commit_id) in commit_ids.iter().enumerate() {
let repo = load_repo_at_head(settings, repo.repo_path()); // unshare loader
let barrier = barrier.clone();
s.spawn(move || {
barrier.wait();
let mut tx = repo.start_transaction(settings, &format!("writer {i}"));
let commit = create_rooted_commit(tx.mut_repo(), settings)
.set_description(format!("commit {i}"))
.write()
.unwrap();
tx.commit();
assert_eq!(commit.id(), commit_id);
});
}
// Reader may generate change id (if not yet assigned by the writer)
for i in 0..num_reader_thread {
let mut repo = load_repo_at_head(settings, repo.repo_path()); // unshare loader
let barrier = barrier.clone();
let mut pending_commit_ids = commit_ids.clone();
pending_commit_ids.rotate_left(i); // start lookup from different place
s.spawn(move || {
barrier.wait();
while !pending_commit_ids.is_empty() {
repo = repo.reload_at_head(settings).unwrap();
let mut tx = repo.start_transaction(settings, &format!("reader {i}"));
pending_commit_ids = pending_commit_ids
.into_iter()
.filter_map(|commit_id| {
match repo.store().get_commit(&commit_id) {
Ok(commit) => {
// update index as git::import_refs() would do
tx.mut_repo().add_head(&commit);
None
}
Err(BackendError::ObjectNotFound { .. }) => Some(commit_id),
Err(err) => panic!("unexpected error: {err}"),
}
})
.collect_vec();
if tx.mut_repo().has_changes() {
tx.commit();
}
thread::yield_now();
}
});
}
});
// The index should be consistent with the store.
let repo = repo.reload_at_head(settings).unwrap();
for commit_id in &commit_ids {
assert!(repo.index().has_id(commit_id));
let commit = repo.store().get_commit(commit_id).unwrap();
assert_eq!(
repo.resolve_change_id(commit.change_id()),
Some(vec![commit_id.clone()]),
);
}
}
fn create_rooted_commit<'repo>(
mut_repo: &'repo mut MutableRepo,
settings: &UserSettings,
) -> CommitBuilder<'repo> {
let signature = Signature {
name: "Test User".to_owned(),
email: "test.user@example.com".to_owned(),
timestamp: Timestamp {
// avoid underflow during timestamp adjustment
timestamp: MillisSinceEpoch(1_000_000),
tz_offset: 0,
},
};
mut_repo
.new_commit(
settings,
vec![mut_repo.store().root_commit_id().clone()],
mut_repo.store().empty_tree_id().clone(),
)
.set_author(signature.clone())
.set_committer(signature)
}
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