git: Fix fetching after shallow clone. Fixes #305

Signed-off-by: Arieh Schneier <15041913+AriehSchneier@users.noreply.github.com>

1 files changed, 68 insertions, 41 deletions

diff --git a/remote_test.go b/remote_test.go
index 1bcdb0f..f8a0bdb 100644
--- a/remote_test.go
+++ b/remote_test.go
@@ -14,7 +14,6 @@ import (
 	"github.com/go-git/go-git/v5/config"
 	"github.com/go-git/go-git/v5/plumbing"
 	"github.com/go-git/go-git/v5/plumbing/cache"
-	"github.com/go-git/go-git/v5/plumbing/object"
 	"github.com/go-git/go-git/v5/plumbing/protocol/packp"
 	"github.com/go-git/go-git/v5/plumbing/protocol/packp/capability"
 	"github.com/go-git/go-git/v5/plumbing/storer"
@@ -1175,7 +1174,7 @@ func (s *RemoteSuite) TestGetHaves(c *C) {
 		),
 	}
 
-	l, err := getHaves(localRefs, memory.NewStorage(), sto)
+	l, err := getHaves(localRefs, memory.NewStorage(), sto, 0)
 	c.Assert(err, IsNil)
 	c.Assert(l, HasLen, 2)
 }
@@ -1404,45 +1403,7 @@ func (s *RemoteSuite) TestCanPushShasToReference(c *C) {
 	c.Assert(err, IsNil)
 	c.Assert(repo, NotNil)
 
-	fd, err := os.Create(filepath.Join(d, "repo", "README.md"))
-	c.Assert(err, IsNil)
-	if err != nil {
-		return
-	}
-	_, err = fd.WriteString("# test repo")
-	c.Assert(err, IsNil)
-	if err != nil {
-		return
-	}
-	err = fd.Close()
-	c.Assert(err, IsNil)
-	if err != nil {
-		return
-	}
-
-	wt, err := repo.Worktree()
-	c.Assert(err, IsNil)
-	if err != nil {
-		return
-	}
-
-	wt.Add("README.md")
-	sha, err := wt.Commit("test commit", &CommitOptions{
-		Author: &object.Signature{
-			Name:  "test",
-			Email: "test@example.com",
-			When:  time.Now(),
-		},
-		Committer: &object.Signature{
-			Name:  "test",
-			Email: "test@example.com",
-			When:  time.Now(),
-		},
-	})
-	c.Assert(err, IsNil)
-	if err != nil {
-		return
-	}
+	sha := CommitNewFile(c, repo, "README.md")
 
 	gitremote, err := repo.CreateRemote(&config.RemoteConfig{
 		Name: "local",
@@ -1472,3 +1433,69 @@ func (s *RemoteSuite) TestCanPushShasToReference(c *C) {
 	}
 	c.Assert(ref.Hash().String(), Equals, sha.String())
 }
+
+func (s *RemoteSuite) TestFetchAfterShallowClone(c *C) {
+	tempDir, clean := s.TemporalDir()
+	defer clean()
+	remoteUrl := filepath.Join(tempDir, "remote")
+	repoDir := filepath.Join(tempDir, "repo")
+
+	// Create a new repo and add more than 1 commit (so we can have a shallow commit)
+	remote, err := PlainInit(remoteUrl, false)
+	c.Assert(err, IsNil)
+	c.Assert(remote, NotNil)
+
+	_ = CommitNewFile(c, remote, "File1")
+	_ = CommitNewFile(c, remote, "File2")
+
+	// Clone the repo with a depth of 1
+	repo, err := PlainClone(repoDir, false, &CloneOptions{
+		URL:           remoteUrl,
+		Depth:         1,
+		Tags:          NoTags,
+		SingleBranch:  true,
+		ReferenceName: "master",
+	})
+	c.Assert(err, IsNil)
+
+	// Add new commits to the origin (more than 1 so that our next test hits a missing commit)
+	_ = CommitNewFile(c, remote, "File3")
+	sha4 := CommitNewFile(c, remote, "File4")
+
+	// Try fetch with depth of 1 again (note, we need to ensure no remote branch remains pointing at the old commit)
+	r, err := repo.Remote(DefaultRemoteName)
+	c.Assert(err, IsNil)
+	s.testFetch(c, r, &FetchOptions{
+		Depth: 2,
+		Tags:  NoTags,
+
+		RefSpecs: []config.RefSpec{
+			"+refs/heads/master:refs/heads/master",
+			"+refs/heads/master:refs/remotes/origin/master",
+		},
+	}, []*plumbing.Reference{
+		plumbing.NewReferenceFromStrings("refs/heads/master", sha4.String()),
+		plumbing.NewReferenceFromStrings("refs/remotes/origin/master", sha4.String()),
+		plumbing.NewSymbolicReference("HEAD", "refs/heads/master"),
+	})
+
+	// Add another commit to the origin
+	sha5 := CommitNewFile(c, remote, "File5")
+
+	// Try fetch with depth of 2 this time (to reach a commit that we don't have locally)
+	r, err = repo.Remote(DefaultRemoteName)
+	c.Assert(err, IsNil)
+	s.testFetch(c, r, &FetchOptions{
+		Depth: 1,
+		Tags:  NoTags,
+
+		RefSpecs: []config.RefSpec{
+			"+refs/heads/master:refs/heads/master",
+			"+refs/heads/master:refs/remotes/origin/master",
+		},
+	}, []*plumbing.Reference{
+		plumbing.NewReferenceFromStrings("refs/heads/master", sha5.String()),
+		plumbing.NewReferenceFromStrings("refs/remotes/origin/master", sha5.String()),
+		plumbing.NewSymbolicReference("HEAD", "refs/heads/master"),
+	})
+}