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The instructions previously available on this page have been superseded.  See [https://gitlab.kitware.com/vtk/vtk/blob/master/Documentation/dev/git/README.md here].
VTK version tracking and development is hosted by [http://git-scm.com Git].
=Official Repository=
One may browse the repository online using the [http://git.wiki.kernel.org/index.php/Gitweb Gitweb] interface at http://vtk.org/gitweb.
These instructions assume a command prompt is available with <code>git</code> in the path.
See our Git [[Git/Download|download instructions]] for help installing Git.
One may clone the repository using [http://www.kernel.org/pub/software/scm/git/docs/git-clone.html git clone] through the native <code>git</code> protocol:
$ git clone git://vtk.org/VTK.git VTK
or through the (less efficient) <code>http</code> protocol:
$ git clone http://vtk.org/VTK.git VTK
All further commands work inside the local copy of the repository created by the clone:
$ cd VTK
For VTKData the URLs are
At the time of this writing the repository has the following branches:
* '''master''': Development (default)
* '''release''': Release maintenance
* '''nightly-master''': Follows '''master''', updated at 01:00 UTC
* '''hooks''': Local commit hooks ([[Git/Hooks#Local|place]] in .git/hooks)
Release branches converted from CVS have been artificially merged into master.
Actual releases have tags named by the release version number.
We provide here a brief introduction to '''VTK''' development with Git.
See the [[Git/Resources|Resources]] page for further information such as Git tutorials.
We require all commits in VTK to record valid author/committer name and email information.
Use [http://www.kernel.org/pub/software/scm/git/docs/git-config.html git config] to introduce yourself to Git:
$ git config --global user.name "Your Name"
$ git config --global user.email "you@yourdomain.com"
Note that "Your Name" is your ''real name'' (e.g. "John Doe", not "jdoe").
While you're at it, optionally enable color output from Git commands:
  $ git config --global color.ui auto
The <code>--global</code> option stores the configuration settings in <code>~/.gitconfig</code> in your home directory so that they apply to all repositories.
The '''hooks''' branch provides local commit hooks to be placed in <code>.git/hooks</code>.
It is shared by many <code>public.kitware.com</code> repositories.
See the general [[Git/Hooks|hooks]] information page to set up your local hooks.
We've chosen to approximate our previous CVS-based development workflow after the initial move to Git, at least while things get settled.
The basic rule is to rebase your work on origin/master before pushing:
git fetch origin
git rebase origin/master
git pull --rebase
The server will refuse your push if it contains any merges.
Later we will move to a full [http://public.kitware.com/Wiki/Git/Workflow/Topic branchy workflow] based on topic branches.
We already provide support for topic branches and merges through the VTK Topic Stage described in the next section.
==Topic Stage==
We provide a "[http://vtk.org/stage/VTK.git VTK Topic Stage]" repository to which developers may publish arbitrary topic branches and request automatic merges.  To follow this workflow, you should have git version 1.7 or greater.
The topic stage URLs are
* <code>git://vtk.org/stage/VTK.git</code> (clone, fetch)
* <code>http://vtk.org/stage/VTK.git</code> (clone, fetch, gitweb)
* <code>git@vtk.org:stage/VTK.git</code> (push)
See our [http://public.kitware.com/Wiki/Git/Workflow/Stage Topic Stage Workflow] documentation for general instructions.
''(Currently VTK does not have a '''next''' branch.  Just skip that part of the instructions and merge directly to master.)''
When accessing the VTK stage, one may optionally substitute
"<code>ssh git@vtk.org stage VTK ...</code>"
"<code>ssh git@public.kitware.com stage <repo> ...</code>"
in the ssh command-line interface.
{| border="0"
!colspan=2|Stage Usage Summary
'''Initial Setup:'''
$ git remote add stage git://vtk.org/stage/VTK.git
$ git config remote.stage.pushurl git@vtk.org:stage/VTK.git
'''Fetch Staged Topics:'''
$ git fetch stage --prune
'''Create Local Topic:'''
$ git checkout -b ''topic-name'' origin/master
$ edit files
$ git commit
'''Stage Current Topic:'''
$ git push stage HEAD
'''Print Staged Topics:'''
$ ssh git@vtk.org stage VTK print
'''Merge Staged Topic:'''
$ ssh git@vtk.org stage VTK merge ''topic-name''
Note that the stage implementation is not VTK-specific and is used for other projects too.
If the merge attempt conflicts it may print instructions for performing the merge manually.
'''Ignore''' these instructions; you will not be able to push the merge commit directly.
Instead, identify the commit that conflicts with yours, merge it into your topic locally, push the topic to the stage again, and then repeat the merge request.
The VTK repository is mirrored on github.  Experimental branches that are not ready for staging can be published on github for review.
The first step in creating a github branch is to create an account on github and make a fork of [http://github.com/Kitware/VTK http://github.com/Kitware/VTK].  Since this fork will be a mirror of the VTK master, there is no need to clone it on your local machine.  Instead, you will just want to set github as an alternative remote in your existing local copy of the VTK git repository.
To set github as an alternative remote, use the following commands:
{| border="0"
!colspan=2|Github Usage Summary
'''Remote Setup:'''
$ git remote add github git://github.com/yourname/VTK.git
$ git config remote.github.pushurl git@github.com:yourname/VTK.git
'''Update the Remote:'''
# update from Kitware's master and push to github
$ git pull
$ git push github HEAD
'''Push Branch to Github:'''
$ git checkout -b some-branch github/master
# edit files and commit changes
$ git push github HEAD
The second step above should be done regularly on your master, in order to keep your github fork up-to-date with the VTK master.  Do not use github's graphical interface for merging commits, it creates new commits by rebasing the commits you select against your VTK fork.  These new commits will be very difficult to merge back into VTK master.
The checkout command in the third step will automatically set github as the default remote for the new branch, so providing github as the remote in the "git push" command is just a precaution.  Also, since it bases the branch on your github fork, you should perform step 2 before creating the branch to make sure that your fork is up-to-date.  This is just a suggestion, as it is always possible to rebase or merge at a later time.
The default remotes for each of your branches are controlled by entries such as this in your  .github/config file:
[branch "my-branch-name"]
remote = github
merge = refs/heads/master
You can edit this file to make github the default remote for your existing branches.  Or you can always use "git push github HEAD" to push each branch to github, without changing the default remote.
Authorized developers may publish work directly to <code>vtk.org/VTK.git</code> using Git's SSH protocol.
To request access, fill out the [https://www.kitware.com/Admin/SendPassword.cgi Kitware Password] form.
See the [[Git/Publish#Push_Access|push instructions]] for details.
For VTK, configure the push URL:
git config remote.origin.pushurl git@vtk.org:VTK.git
For VTKData, configure the push URL:
git config remote.origin.pushurl git@vtk.org:VTKData.git
===Update Hook===
The vtk.org repository has an <code>update</code> hook.
When someone tries to push changes to the repository it checks the commits as documented [[Git/Hooks#update|here]].
Contributions of bug fixes and features are commonly produced by the community. Patches are a convenient method for managing such contributions.
One may send patches after subscribing to our mailing list:
* [http://www.vtk.org/mailman/listinfo/vtk-developers VTK Developers Mailing List]
See our [[Git/Publish#Patches|patch instructions]] for details.
= Troubleshooting =
== fatal: The remote end hung up unexpectedly ==
* If <tt>git push</tt> fails with "fatal: The remote end hung up unexpectedly", you probably forgot to set the push url with "git config" see [[#Pushing]].
== Restoring files locally ==
Q: "I cloned the VTK repository. Now I "rm -rf Hybrid". How do I get it back?"<br>
A: git checkout Hybrid<br>
Q: "I modified a file locally. I want to revert it."<br>
A: git checkout myfile.cxx
Additional information about Git may be obtained at sites listed [[Git/Resources|here]].

Latest revision as of 20:42, 16 March 2015

The instructions previously available on this page have been superseded. See here.