kc3-lang/angle/doc/BranchingAndRolling.md

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  Date : 2015-11-05T15:54:51
  

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  Change-Id: I225ecab48a7d3d0a04390c5535cf5b65709fd758
  Reviewed-on: https://chromium-review.googlesource.com/311072
  Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
  Tested-by: Shannon Woods <shannonwoods@chromium.org>
  

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• doc/BranchingAndRolling.md

• # How to Branch and Roll Chromium's ANGLE Dependency
  
  ANGLE provides an implementation of OpenGL ES on Windows, which Chromium relies
  upon for hardware accelerated rendering and WebGL support. Chromium specifies
  its dependency on a specific version of ANGLE in the repository; this document
  describes how to update that dependency, and, if necessary, create an ANGLE
  branch to correspond to a branched release of Chrome.
  
  ## Rolling DEPS
  
  Chromium's dependency on third-party projects is tracked in [the Chromium
  repository's src/DEPS file]
  (http://src.chromium.org/viewvc/chrome/trunk/src/DEPS). To update the ANGLE
  dependency:
  
   * Find the line in this file that defines "src/third\_party/angle"
  for deps (**not** deps\_os)
   * Change the [git SHA-1 revision number]
  (http://git-scm.com/book/ch6-1.html) to be that of the commit on which Chromium
  should depend. Please use the full SHA-1, not a shortened version.
   * You can
  find the SHA-1 for a particular commit with `git log` on the appropriate branch
  of the repository, or via [the public repository viewer]
  (https://chromium.googlesource.com/angle/angle).
   * If using the public repository viewer, you will need to select the branch whose log you wish to view
  from the list on the left-hand side, and then click on the "tree" link at the
  top of the resulting page. Alternatively, you can navigate to
  `https://chromium.googlesource.com/angle/angle/+/<branch name>/` -- including
  the terminating forward slash. (e.g.
  `https://chromium.googlesource.com/angle/angle/+/master/`)
  
  ## Branching ANGLE
  
  Sometimes, individual changes to ANGLE are needed for a release of Chrome which
  has already been branched. If this is the case, a branch of ANGLE should be
  created to correspond to the Chrome release version, so that Chrome may
  incorporate only these changes, and not everything that has been committed since
  the version on which Chrome depended at branch time. **Please note: Only ANGLE
  admins can create a new branch.** To create a branch of ANGLE for a branched
  Chrome release:
  
   * Determine what the ANGLE dependency is for the Chrome release
  by checking the DEPS file for that branch.
   * Check out this commit as a new branch in your local repository.
      * e.g., for [the Chrome 34 release at chrome/branches/1847]
  (http://src.chromium.org/viewvc/chrome/branches/1847/src/DEPS), the ANGLE
  version is 4df02c1ed5e97dd54576b06964b1da67ea30238e. To check this commit out
  locally and create a new branch named 'mybranch' from this commit, use: ```git
  checkout -b mybranch 4df02c1ed5e97dd54576b06964b1da67ea30238e```
   * To create this new branch in the public repository, you'll need to push the
  branch to the special Gerrit reference location, 'refs/heads/<branch name>'. You
  must be an ANGLE administrator to be able to push this new branch.
      * e.g., to use your local 'mybranch' to create a branch in the public repository called
  'chrome\_m34', use: ```git push origin mybranch:refs/heads/chrome_m34```
      * The naming convention that ANGLE uses for its release-dedicated branches is 'chrome\_m##'.
  

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