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| '''This page is a work in progress.''' The instructions here assume that you have a working knowledge of git.
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| Managing contrib plugin with git makes it easy to make local modifications and pull in updates.
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| There are several options for managing a contrib plugin with git:
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| # Add the module to your main moodle git repository
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| # Create a self-contained repository for the plugin in a subdirectory
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| # Create a git submodule, which creates a repository for the plugin but tracks updates in the main repository too. It also allows you to clone the plugins with the main repository
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| Having used all of the above, the method I'd recommend is number 2, as it's most convenient. The main disadvantage of 1 is that you can't easily pull in updates, and the main disadvantage of 3 is that you have to make each commit to the module twice (once in the submodule, and once in the main repo).
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| == Creating a new plugin ==
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| If you intend to publish the plugin, I highly recommend creating a [http://github.org github] repository from the start. This will allow you to publish with a single command when you're ready. Just go to the site, sign up for an account, create a new repository. The naming convention for Moodle plugin repositories is <tt>moodle-plugintype_pluginname</tt>.
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| Github will give you instructions for cloning your (blank) repository. If you're using option 2 above, navigate to the directory for the plugin type you're developing (e.g. /block, /mod, /local) and run the <tt>git clone</tt> command there. This will create a subdirectory called <tt>moodle-plugintype_pluginname</tt>, rename this to <tt>pluginname</tt> and you're good to go. <tt>cd</tt> into this directory to perform git commands on this plugin's repository - outside of this directory will perform them on the main Moodle repository.
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| You can then develop and test your changes locally, and when you're ready to publish, run
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| git push origin
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| == Installing a third-party plugin ==
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| Installing a plugin developed by a third party differs depending on whether they have used git or not.
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| If they have used git, you can follow the instructions above, but skip out the part where you create a new repository and clone their own git repository instead.
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| If they haven't used git, you can still use git (and even github, if you like) to track local modifications to the plugin. Simply create a directory for the plugin
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| mkdir ~/moodle/blocks/newblock
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| Initialise a new git repository there
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| cd ~/moodle/blocks/newblock
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| git init
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| unzip or copy the files to the repository
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| cd ~
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| tar -xf newblock.tar.gz
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| cp newblock/* ~/moodle/blocks/newblock
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| add and commit the files
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| cd ~/moodle/blocks/newblock
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| git add .
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| git commit . -m "Added files for newblock"
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| When installing updates, you'll need to copy the new files in place of the old one, and re run the <tt>git add</tt> and <tt>git commit</tt> commands.
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| == Moving a plugin to it's own repository ==
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| You may have developed a plugin within your main Moodle repository, but want to move it to a separate one to make it easier to publish. Using <tt>git filter-branch</tt>, we can achieve this and maintain all existing history for the plugin's files.
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| First, you'll need a fresh copy of moodle (this will become your new moodle repository)
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| mkdir ~/newmoodle
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| cd ~/newmoodle
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| git clone git://git.moodle.org/moodle.git
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| This will create a clone of Moodle without your plugins in ~/newmoodle/moodle
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| Next, you need to clone your local Moodle repository (why will become clear).
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| mkdir ~/moodleclone
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| cd ~/moodleclone
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| git clone ~/moodle
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| This will create a clone of your current moodle development repository, with your plugins, in ~/moodleclone/moodle
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| Now, we'll use the <tt>git filter-branch</tt> command to reduce this clone to just the plugin.
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| cd ~/moodleclone/moodle
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| git filter-branch --subdirectory-filter blocks/myblock/
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| The files from blocks/myblock/ will now be at the root of the repository. All other files will have been removed (this is why we're using a clone).
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| You can now track the plugin in it's own repository by cloning this reduced repository to a subdirectory of the new moodle clone.
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| cd ~/newmoodle/blocks
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| git clone ~/moodleclone/moodle myblock
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| This will clone the block's files, with the full history, into their own repository in the myblock subdirectory.
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| You can now delete ~/moodleclone/moodle, and repeat with any other plugins you've developed.
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