Migration

WebKit has moved away from Subversion to Git, and contributors will need to migrate their local checkouts and workflows to GitHub. To determine which migration workflow you need, run the following command in your WebKit repository:

git remote -v

If you see something like:

fatal: not a git repository (or any parent up to mount point /Volumes)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).

you have a Subversion checkout and need to migrate to a GitHub checkout.

If you see something like:

origin    https://git.webkit.org/git/WebKit-https (fetch)
origin    https://git.webkit.org/git/WebKit-https (push)

or:

origin    https://git.webkit.org/git/WebKit (fetch)
origin    https://git.webkit.org/git/WebKit (push)

you have an obsolete git mirror for how to deal with patches uploaded to bugzilla.) and need to migrate to a GitHub checkout.

If you see something like:

origin    git@github.com:WebKit/WebKit.git (fetch)
origin    git@github.com:WebKit/WebKit.git (push)

you already have a GitHub checkout, and can skip to setting up your checkout.

Subversion

Migrating from a Subversion checkout involves first cloning the WebKit repository with git clone https://github.com/WebKit/WebKit.git <local path>. A SSH based clone will work as well, but will require an SSH key to be uploaded.

After your clone completes, set up your checkout. If you don't have local changes in your Subversion checkout, no more migration work is required. If you do have local changes, use Tools/Scripts/svn-create-patch to save those changes in a local .patch file and then run Tools/Scripts/svn-apply to apply that patch to your new GitHub clone. See below for how to deal with patches uploaded to bugzilla.

Obsolete Mirror

The repository hosted via github.com/WebKit/WebKit has different commits from the ones hosted on git.webkit.org. While it is possible convert an existing checkout, the WebKit team recomends that you freshly clone the WebKit repository with git clone https://github.com/WebKit/WebKit.git <local path>. A SSH based clone will work as well, but will require an SSH key to be uploaded.

After your clone completes, set up your checkout. The WebKit team has not built automation to assist in migrating branches from git.webkit.org checkouts to github.com/WebKit/WebKit ones. However, the content on disk in both repositories is identical. That means that something like git -C <oldpath> diff HEAD~1 | git -C <newpath> apply will apply a commit from one checkout to the other, assuming the diff of the commit you're moving applies to commit you have checked out.

See below for how to deal with patches uploaded to bugzilla.

webkit-patch

While Tools/Scripts/webkit-patch is being replaced by Tools/Scripts/git-webkit for developement workflows, webkit-patch does continue to work on GitHub based checkouts. In particular:

Tools/Scripts/webkit-patch apply-from-bug 238981

will apply the patch uploaded to bug 238981 to a user's local checkout, even if that checkout is a GitHub based checkout. Simlarly, this command:

Tools/Scripts/webkit-patch upload

will upload local changes to the bugzilla bug mentioned in modified ChangeLog files, even if those local changes are committed to a pull request branch.

webkit-patch Reverse Look-up

The table bellow includes a number of common webkit-patch commands and their git-webkit equivalences.

webkit-patch	git-webkit	Description
webkit-patch apply-attachment	git-webkit checkout pr-#	Get another contributor's unlanded change
webkit-patch clean	git-webkit clean	Discard uncommitted local changes
webkit-patch create-revert <revisions>	git-webkit revert --pr <hash/identifier>	Upload a proposal to revert a landed change
webkit-patch help -a	git-webkit --help	Print program help message
webkit-patch land	git-webkit land	Land a local change via Commit/Merge Queue
webkit-patch land-unsafe	git-webkit land --unsafe	Land a local change manually/via Unsafe Merge Queue
webkit-patch prepare-revert <revisions>	git-webkit revert <hash/identifier>	Revert a landed change locally
webkit-patch setup-git-clone	git-webkit setup	Configure a local checkout for development
webkit-patch upload	git-webkit pr	Upload a change for review