PlainCloneContext fails with "reference delta not found" error when using aws codecommit repository

[bassofed]

I'd like to have news on this old bug.

This is my code:

func main() {
	log.Println("Script git started")

	repos := [6]string{"my_repo_1", "my_repo_2", "my_repo_3", "my_repo_4", "my_repo_5", "my_repo_6"}

	for i := 0; i < len(repos); i++ {
		reponame := repos[i]

		log.Println("BEGIN: " + reponame)

		repourl := "https://git-codecommit.us-west-2.amazonaws.com/v1/repos/" + reponame

		gitOptions := git.CloneOptions{
			URL:             repourl,
			Depth:           1,
			RemoteName:      "origin",
			ReferenceName:   plumbing.ReferenceName("refs/heads/master"),
			SingleBranch:    true,
			NoCheckout:      false,
			Progress:        nil,
			Tags:            git.NoTags,
			InsecureSkipTLS: true,
			Auth: &githttp.BasicAuth{
				Username: "my_aws_user",
				Password: "my_aws_password",
			},
		}

		_, err := git.PlainCloneContext(context.TODO(), reponame, false, &gitOptions)

		if err != nil {
			log.Println("error:")
			log.Println(err)
		} else {
			log.Println("success")
		}

		log.Println("END: " + reponame)
	}

}

with the following output:

2021/06/16 15:18:15 Script git started
2021/06/16 15:18:15 BEGIN: my_repo_1
2021/06/16 15:18:19 success
2021/06/16 15:18:19 END: my_repo_1
2021/06/16 15:18:19 BEGIN: my_repo_2
2021/06/16 15:44:34 error:
2021/06/16 15:44:34 reference delta not found
2021/06/16 15:44:34 END: my_repo_2
2021/06/16 15:44:34 BEGIN: my_repo_3
2021/06/16 15:45:12 success
2021/06/16 15:45:12 END: my_repo_3
2021/06/16 15:45:12 BEGIN: my_repo_4
2021/06/16 15:45:18 error:
2021/06/16 15:45:18 reference delta not found
2021/06/16 15:45:18 END: my_repo_4
2021/06/16 15:45:18 BEGIN: my_repo_5
2021/06/16 15:48:19 error:
2021/06/16 15:48:19 reference delta not found
2021/06/16 15:48:19 END: my_repo_5
2021/06/16 15:48:19 BEGIN: my_repo_6
2021/06/16 15:52:43 error:
2021/06/16 15:52:43 reference delta not found
2021/06/16 15:52:43 END: my_repo_6

only 2 out of 6 clone works
I tried several times and it always fails on the same repos

[bassofed]

It seems that the zlib compression fails to read the headers of some reference in the repository.
It seems more a AWS compression problem but I can't understand why plain git works

[bassofed]

This pull request fixes this problem for me

[AriehSchneier]

@pjbgf please close as fixed in #392 (and also can close #111)