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Reorganize documentation.
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@title Setting Up .arcconfig
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@group config
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Explains how to configure Arcanist projects with ##.arcconfig## files.
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= .arcconfig Basics =
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Arcanist uses ##.arcconfig## files to determine a number of things about project
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configuration. For instance, these are things it figures out from
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##.arcconfig##:
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- where the logical root directory of a project is;
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- which server Arcanist should send diffs to for code review; and
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- which lint rules should be applied.
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An ##.arcconfig## file is a JSON file which you check into your project's root.
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A simple, valid file looks something like this:
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{
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"project_id" : "some_project_name",
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"conduit_uri" : "https://phabricator.example.com/api/"
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}
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Here's what these options mean:
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- **project_id**: a human-readable string identifying the project
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- **conduit_uri**: the Conduit API URI for the Phabricator installation that
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Arcanist should send diffs to for review. Generally, if you access
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Phabricator at ##https://phabricator.example.com/##, the **conduit_uri** is
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##https://phabricator.example.com/api/##. Be mindful about "http" vs
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"https".
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For an exhaustive list of available options, see below.
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= Advanced .arcconfig =
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Other options include:
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- **lint_engine**: the name of a subclass of @{class:ArcanistLintEngine},
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which should be used to apply lint rules to this project. See (TODO).
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- **unit_engine**: the name of a subclass of
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@{class:ArcanistBaseUnitTestEngine}, which should be used to apply unit
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test rules to this project. See (TODO).
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- **arcanist_configuration**: the name of a subclass of
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@{class:ArcanistConfiguration} which can add new command flags for this
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project or provide entirely new commands.
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- **remote_hooks_installed**: tells Arcanist that you've set up remote hooks
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in the master repository (see @{article:Installing Arcanist SVN Hooks} for
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SVN, or (TODO) for git).
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- **copyright_holder**: used by @{class:ArcanistLicenseLinter} to apply
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license notices to source files.
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- **phutil_libraries**: map of additional Phutil libraries to load at startup.
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@title Building New Configuration Classes
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@group config
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Explains how to build new classes to control how Arcanist behaves.
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= Overview =
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Arcanist has some basic configuration options available in the ##.arcconfig##
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file (see @{article:Setting Up .arcconfig}), but it can't handle everything. If
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you want to customize Arcanist at a deeper level, you need to build new classes.
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For instance:
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- if you want to configure linters, or add new linters, you need to create a
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new class which extends @{class:ArcanistLintEngine}.
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- if you want to integrate with a unit testing framework, you need to create a
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new class which extends @{class:ArcanistBaseUnitTestEngine}.
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- if you you want to change how workflows behave, or add new workflows, you
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need to create a new class which extends @{class:ArcanistConfiguration}.
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Arcanist works through a sort of dependency-injection approach. For example,
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Arcanist does not run lint rules by default, but you can set **lint_engine**
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in your ##.arcconfig## to the name of a class which extends
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@{class:ArcanistLintEngine}. When running from inside your project, Arcanist
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will load this class and call methods on it in order to run lint. To make this
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work, you need to do three things:
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- actually write the class;
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- add the library where the class exists to your ##.arcconfig##;
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- add the class name to your ##.arcconfig## as the **lint_engine**,
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**unit_engine**, or **arcanist_configuration**.
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= Write the Class =
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(TODO)
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= Load the Class =
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To make the class loadable, you need to put the path to it in your
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##.arcconfig##, under **phutil_libraries**:
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{
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// ...
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"phutil_libraries" : {
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// ...
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"my-library" : "/path/to/my/library",
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// ...
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}
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// ...
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}
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You can either specify an absolute path, or a path relative to the project root.
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When you run ##arc --trace##, you should see a message to the effect that it has
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loaded your library.
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For debugging or testing, you can also run Arcanist with the
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##--load-phutil-library## flag:
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arc --load-phutil-library=/path/to/library <command>
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You can specify this flag more than once to load several libraries. Note that
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if you use this flag, Arcanist will ignore any libraries listed in
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##.arcconfig##.
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= Use the Class =
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This step is easy: just edit ##.arcconfig## to specify your class name as
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the appropriate configuration value.
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{
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// ...
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"lint_engine" : "MyCustomArcanistLintEngine",
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// ...
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}
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Now, when you run Arcanist in your project, it will invoke your class when
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appropriate.
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For lint and unit tests, you can also use the ##--engine## flag override the
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default engine:
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arc lint --engine MyCustomArcanistLintEngine
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This is mostly useful for debugging and testing.
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Overview of Arcanist, a code workflow tool.
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Overview of Arcanist, a code workflow tool.
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Arcanist (commonly, "arc") is the command-line frontend to Differential. A
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Arcanist (commonly, "arc") is the command-line frontend to Phabricator and
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detailed command reference is available by running ##arc help##.
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Differential. A detailed command reference is available by running ##arc help##.
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= Overview =
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= Documentation =
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Arcanist is the command-line interface to Differential, and supports some
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The Arcanist documentation is primarily focused at Arcanist developers and
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related revision control operations. Arcanist allows you to do things like:
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explains the project's internals. Arcanist user documentation which explains
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how to use the tool is available in the Phabricator project:
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- send your code to Differential for review with ##arc diff##
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- commit reviewed changes with ##arc commit## (svn) or ##arc amend## (git)
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- check your code for syntax and style errors with ##arc lint##
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- run unit tests that cover your changes with ##arc unit##
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- export changes from Differential or the working copy with ##arc export##
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- apply patches from Differential or patchfiles with ##arc patch##
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- execute context-aware blame with ##arc cover##
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- show Differential status with ##arc list##
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In general, these workflows are agnostic to the underlying version control
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system and will work properly in git or svn repositories.
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= Configuring a New Project =
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Create a .arcconfig file.
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= SVN Basics =
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- for an overview of Arcanist, see @{article@phabricator:Arcanist User
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Guide}.
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- for information on configuring a new project and setting up an
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##.arcconfig## file, see @{article@phabricator:Arcanist User Guide:
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Configuring a New Project}.
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- to install remote hooks in a repository, see @{article@phabricator:Arcanist
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User Guide: Repository Hooks}.
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- to integrate Arcanist with linters, unit tests and custom workflows, see
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@{article@phabricator:Arcanist User Guide: Customizing Lint, Unit Tests and
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Workflows}.
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@title Installing Arcanist SVN Hooks
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@group config
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Describes how to set up Arcanist as an SVN pre-commit hook.
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= Installing Arcanist SVN Hooks =
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You can install Arcanist as an SVN pre-commit hook, to reject commits which
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contain lint errors. The immediate value of this is that syntax errors won't
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be committable, but you can block other kinds of badness with appropriate lint
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engines.
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To install Arcanist as a pre-commit hook, add this to your svn/hooks/pre-commit:
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#!/bin/sh
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/usr/local/bin/php -f /path/to/arcanist/bin/arc svn-hook-pre-commit $@ 1>&2
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Make sure you make this file executable, or you'll get an error for every commit
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with an unhelpful error message. You also need to specify the full path to PHP
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since SVN nukes ENV before executing scripts. Alternatively you can specify
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PATH explicitly.
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If your project is configured to run linters or lint engines which aren't part
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of Arcanist, specify where to load them from with ##--load-phutil-library##:
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--load-phutil-library=/path/to/library/root
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Since SVN commit hooks run without access to a working copy, you'll need to keep
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one checked out somewhere and reference it with ##--load-phutil-library## if you
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build new linters or customize lint engines. For example, your hook might
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look like this:
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#!/bin/sh
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/usr/local/bin/php -f /path/to/arcanist/bin/arc svn-hook-pre-commit \
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--load-phutil-library=/path/to/custom/lint/engine \
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--load-phutil-library=/path/to/custom/unittest/engine \
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$@ 1>&2
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