Files already exist in <location> when migrating a repo.

Ok, back again 😃

I was able to get copybara working using the copybara repo, and now I’m switching over to the @sonatype repo I want to migrate to a public one.

I’m running copybara copy.bara.sky --force

My copy.bara.sky looks like:

url = "[e-mail]:sonatype/INTERNAL_REPO.git"

core.workflow(
    name = "default",
    origin = git.origin(
        url = url,
        ref = "master",
    ),
    destination = git.destination(
        url = "file:///tmp/foo",
        fetch = "master",
        push = "master",
    ),
    destination_files = glob(["matthew/py-iq-reports/IQreport/**"], exclude = ["README_INTERNAL.txt"]),

    authoring = authoring.pass_thru("Jeffry Hesse <[e-mail]>"),
    transformations = [
	    core.move("", ""),
	],
)

I end up with this:

764 jeffryhesse:IQreport (master *)$ copybara copy.bara.sky --force
Copybara source mover (Version: Unknown version)
Task: Git Origin: Initializing local repo
Enter passphrase for key '/Users/jeffryhesse/.ssh/id_rsa': 
WARN: Cannot find last imported revision, but proceeding because of --force flag
Task: Moving 
ERROR: Files already exist in /Users/jeffryhesse/copybara/temp/workdir2564596437170999916/checkout:

I’ve truncated the filelist since it’s a lot of internal stuff, plus likely not going to give much actual detail on the issue. I’m not sure what’s quite going on here, and I’m sure I’m missing something. Any help is appreciated.

[mikelalcon]

No problem at all 😃. We should improve the documentation.

Let me write here a short example for now:

Lets say we want to move ‘public’ folder from git.origin but we don’t want to export ‘public/SECRET.txt’

origin_files would be:

origin_files = glob([“public/**”], exclude = [“public/SECRET.txt”])

Note that we exclude public/SECRET.txt and not just SECRET.txt. This is because the include part can contain multiple folders.

Now lets say we want to move everything to the root of the destination:

transformations = [ core.move(“public”, “”) ]

Now lets say we have in the destination a README.txt file that we don’t want to delete:

destination_files= glob([“**”], exclude = [“README.txt”])

Now lets say that instead we want to keep it in the ‘public’ folder in the destination. You would not include any transformations (You can skip transformations = …) and instead you would write the following destinations_files:

destination_files= glob([“public/**”], exclude = [“public/README.txt”])

Or if you don’t have a README.txt inside public:

destination_files= glob([“**”])

[koppor]

I came here by googling for that error message. My solution was to use overwrite=True. Just in case someone else comes here and is as impatient as me when reading the move reference:

transformations = [
    core.move("README-public.md", "README.md", overwrite=True)
],