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This is a simple script to migrate issues from Google Code to Github.

For a full history of changes, please consult the change log.

How it works

The script iterates over the issues and comments in a Google Code repository, creating matching issues and comments in Github. This has some limitations:

  • All migrated issues and comments are authored by the user running the script, and lose their original creation date. We try to mitigate this by adding a non-obtrusive header to each issue and comment stating the original author and creation date.

  • Attachments are lost, since Github doesn't support them in issues or comments.

Otherwise almost everything is preserved, including labels, issue state (open/closed), issue status (invalid, wontfix, duplicate) and merged-into links for duplicate issues.

The script can be run repeatedly to migrate new issues and comments, without mucking up what's already on Github.

Required Python libraries

  • gdata -- pip install gdata
  • PyGithub -- pip install PyGithub -- v1.8.0+ required

Usage

migrateissues.py [options] <google project name> <github username> <github project>

  google_project_name 	    The project name (from the URL) from google code
  github_user_name 	        The Github username
  github_project 	        The Github project name, e.g. username/project

Options:
  -h, --help                show this help message and exit
  -a, --assign-owner        Assign owned issues to the Github user
  -d, --dry-run             Don't modify anything on Github
  -p, --omit-priority       Don't migrate priority labels
  -s, --synchronize-ids     Ensure that migrated issues keep the same ID

    You will be prompted for your github password.

--assign-owner automatically assigns any issues that currently have an owner to your Github user (the one running the script), even if you weren't the original owner. This is used to save a little time in cases where you do in fact own most issues.

--dry-run does as much as possible without actually adding anything to Github. It's useful as a test, to turn up any errors or unexpected behaviors before you run the script, irreversibly, on your real repository.

--omit-priorities skips migration of Google Code Priority labels, since many projects don't actually use them, and would just remove them from Github anyway.

--synchronize-ids attempts to ensure that every Github issue gets the same ID as its original Google Code issue. Normally this happens anyway, but in some cases Google Code skips issue numbers; this option fills the gaps with dummy issues to ensure that the next real issue keeps the same numbering. This only works, of course, if the migration starts with a fresh Github repistory.