sync: switch local checkout to multiprocessing

This avoids GIL limitations with using threads for parallel processing.
In a CrOS checkout with ~1000 repos, the nop case goes from ~6 sec down
to ~4 sec with -j8.  Not a big deal, but shows that this actually works
to speed things up unlike the threading model.

This reworks the checkout logic to return results for processing in the
main thread instead of leaving every thread to do its own processing.

Bug: https://crbug.com/gerrit/12389
Change-Id: I143e5e3f7158e83ea67e2d14e5552153a874248a
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/298063
Reviewed-by: Chris Mcdonald <cjmcdonald@google.com>
Tested-by: Mike Frysinger <vapier@google.com>
1 file changed
tree: b22de7eb3060f913395d2e655e996ce6fd64fd60
  1. .github/
  2. docs/
  3. hooks/
  4. release/
  5. subcmds/
  6. tests/
  7. .flake8
  8. .gitattributes
  9. .gitignore
  10. .mailmap
  11. .project
  12. .pydevproject
  13. color.py
  14. command.py
  15. editor.py
  16. error.py
  17. event_log.py
  18. git_command.py
  19. git_config.py
  20. git_refs.py
  21. git_ssh
  22. git_superproject.py
  23. git_trace2_event_log.py
  24. gitc_utils.py
  25. hooks.py
  26. LICENSE
  27. main.py
  28. MANIFEST.in
  29. manifest_xml.py
  30. pager.py
  31. platform_utils.py
  32. platform_utils_win32.py
  33. progress.py
  34. project.py
  35. README.md
  36. repo
  37. repo_trace.py
  38. requirements.json
  39. run_tests
  40. setup.py
  41. SUBMITTING_PATCHES.md
  42. tox.ini
  43. wrapper.py
README.md

repo

Repo is a tool built on top of Git. Repo helps manage many Git repositories, does the uploads to revision control systems, and automates parts of the development workflow. Repo is not meant to replace Git, only to make it easier to work with Git. The repo command is an executable Python script that you can put anywhere in your path.

Contact

Please use the repo-discuss mailing list or issue tracker for questions.

You can file a new bug report under the “repo” component.

Please do not e-mail individual developers for support. They do not have the bandwidth for it, and often times questions have already been asked on repo-discuss or bugs posted to the issue tracker. So please search those sites first.

Install

Many distros include repo, so you might be able to install from there.

# Debian/Ubuntu.
$ sudo apt-get install repo

# Gentoo.
$ sudo emerge dev-vcs/repo

You can install it manually as well as it's a single script.

$ mkdir -p ~/.bin
$ PATH="${HOME}/.bin:${PATH}"
$ curl https://storage.googleapis.com/git-repo-downloads/repo > ~/.bin/repo
$ chmod a+rx ~/.bin/repo