OS 499 Scripts

Authentication

.netrc (for svn)

• Create ~/.netrc with your WatIAM credentials to log into the SVN server

  machine ecesvn.uwaterloo.ca login password

• Set the correct permissions on ~/.netrc (Note: This won't save you from untrusted sysadmins on that box.)

  $ chmod 0600 ~/.netrc

SSH keys (for git)

• Create a password-less SSH key for use for mirroring

  $ ssh-keygen -f ~/.ssh/id_rsa_os499_github

• Add the contents of the public key to a GitHub account with R/W access to the OS 499 repositories (presumably yours, although a separate bot account would theoretically do). (Don't forget the .pub. :)

  $ cat ~/.ssh/id_rsa_os499_github.pub

  ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDFJoUl9JvSemQWZVMNlw8bT8WqUel+Lq90MIFg6uaFi8yn0QX8tT8YmDrh8g4pmIkX1vFuJCh2H397//Ff19QoLFze4kz5kRpML8qniW2SF/qmGyKn34PaUnhAuoJPFXiNq3JcIg8Qx8wdwNMpSjUvMGemFcwZYgGUDdwhsu1pV7tz47fDNcBW9WSl+bO0rG+xNFWMALiaVb71s8mqjCjiPoQVJblvyE0iuBdhk8kY7IaiFUx/b73BWS2elfpmLCvtMoo0DKVF4elo5YcirllD6IMqO44YYkjQRdYngaz5gmbXGLOJKD5P+WouTKcH08Oww2VhJwrsfTbb2AKGprTJ michael@paprika

• Create or amend ~/.ssh/config to enable automated login with the correct key

  Host os499mirror User git Hostname github.com IdentityFile /home/michael/.ssh/id_rsa_os499_github

• Set the correct permissions on ~/.ssh/config

  $ chmod 0600 ~/.ssh/config

Creating a Repository

Dependencies

On recent verisons of Ubuntu (tested on 11.10 as of the time of writing),

$ sudo aptitude install subversion git git-svn

Note that git used to be called git-core on older Debian-based distributions. For other distributions, YMMV.

Create "repository" in SVN

• NB. This just creates a folder under the single master os499 repository. (FIXME: Perhaps there is a way to make a proper "child" repository; if so, need to see if it's appropriate for our use.)

• Check out os499 from ecesvn

  $ mkdir ~/svn/ $ cd ~/svn/ $ svn co https://ecesvn.uwaterloo.ca/courses/os499

NOTE: The SVN repository was initially located at [https://ecesvn.uwaterloo.ca/people/os499][] .

• Make the new "repository" (called scripts here); add a README file. (Markdown for illustration because that's what this file uses.)

  $ cd os499 $ mkdir scripts $ mkdir scripts/trunk $ touch scripts/trunk/README.markdown // ... vim scripts/trunk/README.markdown (optional)

• Commit to SVN (this pushes to the server at the same time)

  $ svn add scripts $ svn commit

Set up mirror on GitHub for non-public repos

Note that if the repo is public, you can just use GitHub's mirroring feature.

• Create the project on GitHub

• Initial set-up (git)

  $ mkdir ~/git/ $ mkdir ~/git/scripts/ $ cd ~/git/scripts/ $ git init

• Create svn.authors

  m9chang = Michael Chang m9chang@uwaterloo.ca =

• Initial sync

  $ git svn init -T https://ecesvn.uwaterloo.ca/courses/os499/scripts/trunk/ Using higher level of URL: https://ecesvn.uwaterloo.ca/courses/os499/scripts/trunk => https://ecesvn.uwaterloo.ca/courses/os499 $ git svn fetch --authors-file=svn.authors $ git gc

• Initial push (host here should match the Host line in .ssh/config that you created earlier)

  $ git remote add origin git@os499mirror:os499/scripts $ git push origin master

Keeping a Repo Mirror Up-to-Date

SVN -> Git

$ git svn rebase --authors-file=svn.authors
$ git push origin master

Git -> SVN (FIXME)

$ git pull origin master
$ git svn dcommit

Changes in both locations (FIXME)

$ git svn rebase --authors-file=svn.authors
$ git pull origin master
// ... resolve merge issues in Git
$ git push origin master
$ git svn dcommit

SVN URL changes (FIXME)

• [GitSvnSwitch][] [GitSvnSwitch]: https://git.wiki.kernel.org/index.php/GitSvnSwitch

Crontab

TODO

Jekyll

TODO

Further Reading

• OS 499
• OS 499 Github
• HOWTO iCoreTech
• HOWTO petersteinberger.com
• GitHub Pages
• Jekyll Wiki