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=============================
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Code Reviews with Phabricator
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=============================
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.. contents::
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:local:
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If you prefer to use a web user interface for code reviews,
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you can now submit your patches for Clang and LLVM at
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`LLVM's Phabricator`_.
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Sign up
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-------
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Sign up with one of the supported OAuth account types. If
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you use your Subversion user name as Phabricator user name,
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Phabricator will automatically connect your submits to your
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Phabricator user in the `Code Repository Browser`_.
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Requesting a review via the command line
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----------------------------------------
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Phabricator has a tool called *Arcanist* to upload patches from
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the command line. To get you set up, follow the
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`Arcanist Quick Start`_ instructions.
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You can learn more about how to use arc to interact with
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Phabricator in the `Arcanist User Guide`_.
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Requesting a review via the web interface
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-----------------------------------------
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The tool to create and review patches in Phabricator is called
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*Differential*.
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Note that you can upload patches created through various diff tools,
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including git and svn. To make reviews easier, please always include
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**as much context as possible** with your diff! Don't worry, Phabricator
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will automatically send a diff with a smaller context in the review
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email, but having the full file in the web interface will help the
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reviewer understand your code.
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To get a full diff, use one of the following commands (or just use Arcanist
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to upload your patch):
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* git diff -U999999 other-branch
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* svn diff --diff-cmd=diff -x -U999999
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To upload a new patch:
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* Click *Differential*.
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* Click *Create Revision*.
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* Paste the text diff or upload the patch file.
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Note that TODO
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* Leave the drop down on *Create a new Revision...* and click *Continue*.
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* Enter a descriptive title and summary; add reviewers and mailing
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lists that you want to be included in the review. If your patch is
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for LLVM, cc llvm-commits; if your patch is for Clang, cc cfe-commits.
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* Click *Save*.
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To submit an updated patch:
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* Click *Differential*.
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* Click *Create Revision*.
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* Paste the updated diff.
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* Select the review you want to from the *Attach To* dropdown and click
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*Continue*.
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* Click *Save*.
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Reviewing code with Phabricator
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-------------------------------
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Phabricator allows you to add inline comments as well as overall comments
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to a revision. To add an inline comment, select the lines of code you want
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to comment on by clicking and dragging the line numbers in the diff pane.
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You can add overall comments or submit your comments at the bottom of the page.
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Phabricator has many useful features, for example allowing you to select
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diffs between different versions of the patch as it was reviewed in the
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*Revision Update History*. Most features are self descriptive - explore, and
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if you have a question, drop by on #llvm in IRC to get help.
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Status
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------
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Currently, we're testing Phabricator for use with Clang/LLVM. Please let us
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know whether you like it and what could be improved!
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.. _LLVM's Phabricator: http://llvm-reviews.chandlerc.com
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.. _Code Repository Browser: http://llvm-reviews.chandlerc.com/diffusion/
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.. _Arcanist Quick Start: http://www.phabricator.com/docs/phabricator/article/Arcanist_Quick_Start.html
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.. _Arcanist User Guide: http://www.phabricator.com/docs/phabricator/article/Arcanist_User_Guide.html
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