... is not an osc package working copy

[rhabacker]

Describe the bug
An older checkout of a project from build.opensuse.org cannot be updated with osc version 1.8.1. I get an error message that "... is not an osc package working copy"

Versions

• Operating system: openSUSE Leap 15.5
• Packages: osc-1.8.1-150500.411.1.noarch

To Reproduce

Steps to reproduce the behavior:

1. Unpack testcase.zip
2. Enter unpacked directory, open a console and run osc update
3. See error

Expected behavior
The error message should not appear and the update should take place.

Additional context

• A comparison of the old directory with a current check-out results:

$ diff -r windows\:mingw\:snapshots.old/ windows\:mingw\:snapshots
Only in windows:mingw:snapshots/.osc: _osclib_version.

By copying the file _osclib_version into the old directory, the update command is successfully executed, which suggests that the current osc version does not take this case into account.

• The older checkout took place in January 2019.

[dmach]

Thanks for the report. It looks there was a time when osc was creating incorrect checkouts without _osclib_version.
There's a pending PR that fixes that: #1590
Originally I was planning to close it without merging, thinking that it was a one-off problem.
It seems that the problem might be more widespread and it requires a fix rather than forcing users to run osc repairwc for each such directory.