ManageIQ Plugin Development
Plugins in ManageIQ are developed as Rails Engines. All models, controllers etc. are loaded during boot time of ManageIQ and are just available as you would expect.
Before anything, you have to create a fork of the plugin on Github.
- Go to the plugins repository page, e.g. ManageIQ/manageiq-ui-classic
- Click the Fork button and choose “Fork to <yourname>”
It does not really matter where you clone your plugins. Both approaches have their advantages.
Side by side
Having the plugins and the core repository side by side, i.e. at the same directory level, is straight forward and lets you separate checkouts cleanly.
git clone email@example.com:JoeSmith/manageiq-providers-amazon.git git clone firstname.lastname@example.org:JoeSmith/manageiq-content.git git clone email@example.com:JoeSmith/manageiq-ui-classic.git
Inside the core ManageIQ checkout
plugins/ directory inside the core repository is ignored by
.gitignore. This means you can clone plugins
into this directory. The benefit is, e.g. when working with a project oriented IDE, you have all code under one
directory. This way you can easily search across the core and plugin code base.
You still have to change into the plugin root directory to run the tests - running
rspec from the ManageIQ root will
not pickup your plugin code, but the core code. This is a drawback which can lead to some confusion.
cd /path/to/manageiq ; mkdir plugins git clone firstname.lastname@example.org:JoeSmith/manageiq-providers-amazon.git plugins/manageiq-providers-amazon git clone email@example.com:JoeSmith/manageiq-content.git plugins/manageiq-content git clone firstname.lastname@example.org:JoeSmith/manageiq-ui-classic.git plugins/manageiq-ui-classic
Setting the correct remotes
Inside your checkout you will have the default remote origin pointing to your fork. Now add an upstream remote which points to the upstream repository. To keep your fork up to date, you will have to merge changes from upstream into your fork.
cd manageiq-ui-classic git remote -v # origin email@example.com:JoeSmith/manageiq-ui-classic.git (fetch) # origin firstname.lastname@example.org:JoeSmith/manageiq-ui-classic.git (push) git remote add upstream email@example.com:ManageIQ/manageiq-ui-classic git fetch upstream # merge upstream into your fork git checkout master git pull upstream master git push origin master
To run the tests for a plugin, we need an application context. Usually Rails expects a dummy Rails app. But because
our plugins are only for ManageIQ, we run the tests inside the ManageIQ app. Therefore we need a checkout of ManageIQ
spec/manageiq. The database used for tests is the same as for the core app. Keep that in mind when developing a
feature that requires database migrations.
cd manageiq-providers-amazon bin/setup # == Cloning manageiq sample app == # Cloning into 'spec/manageiq'... bundle install bundle exec rake spec:setup # ** Preparing database # Dropped database 'vmdb_test' # Created database 'vmdb_test' bundle exec rake
Updating the sample app is handled by
bin/update # == Updating manageiq sample app ==
Cross repository dependencies
Sometimes you need to develop your feature against a branch of ManageIQ that is not yet merged into master. This creates cross repository dependencies, which can be handled from the plugin side or from the core side.
Symlink your sample app
Creating a symlink from
spec/manageiq to your current checkout of ManageIQ will run the tests inside whatever branch
you checked out in the core repo.
# remove current sample app rm -rf spec/manageiq # create a symlink ln -s /path/to/manageiq spec/manageiq
Dependency on a local gem
Inside ManageIQ core, you can override gem dependencies with
override_gem. This is a small helper to be used under
bundler.d directory. Use it to point the dependency to a local version of your plugin.
Please, use absolute path in
# bundler.d/local_plugins.rb: override_gem 'manageiq-providers-amazon', :path => File.expand_path('/home/developer/repos/manageiq-providers-amazon')
or use relative path to current file and
# bundler.d/local_plugins.rb: override_gem 'manageiq-providers-amazon', :path => File.expand_path('../../manageiq-providers-amazon', __dir__)
Unfortunately Rails Engines don’t support running
rails console from the root of the plugin. To test your code you
will have to change the dependency of ManageIQ to point to your local plugin. See above.
Migrating a PR from ManageIQ
If you have an open PR on ManageIQ that has not been merged before the split, you can cherry-pick all commits from the feature branch into a new branch in the plugin repository.
# get all commit shas that are not yet in master - or just look at https://github.com/ManageIQ/manageiq/pull/<id> cd /path/to/manageiq git checkout feature_branch git log $(git rev-parse --abbrev-ref HEAD) --not refs/heads/master # add ManageIQ as a remote in your plugin cd /path/to/manageiq-providers-amazon git remote add miq /path/to/manageiq git fetch miq # create a new branch in the plugin and cherry-pick commits git checkout -b feature_branch git cherry-pick <sha from above> # should be a clean cherry-pick if it only changes files that are in the new plugin, if not: # git checkout master -- path/to/file # will discard your changes to file # git rm path/to/file # will drop the file from the cherry-pick in progress # git cherry-pick --continue # will continue the cherry-pick # git cherry-pick --abort # will abort
If your PR has a lot of commits or you have a lot of PRs, this script automates it.
jq to parse the github API output -
brew install jq or
dnf install jq or
apt install jq.
Optionally uses hub to create the pull request.
PR=123 COMMITS=`wget -qO- https://api.github.com/repos/ManageIQ/manageiq/pulls/$PR/commits | jq -r ..sha` TITLE=`wget -qO- https://api.github.com/repos/ManageIQ/manageiq/pulls/$PR | jq -r .title` DESCRIPTION=`wget -qO- https://api.github.com/repos/ManageIQ/manageiq/pulls/$PR | jq -r .body` cd manageiq-ui-classic/ git remote add tmp https://github.com/ManageIQ/manageiq.git git fetch tmp pull/$PR/head git checkout -b miq_pr_$PR echo "Running cherry-pick - if there's a conflict, resolve it, commit, and do git cherry-pick --continue" git cherry-pick -x $COMMITS git push -u origin miq_pr_$PR [ -x "`which hub`" ] && hub pull-request -m "$TITLE $DESCRIPTION (converted from ManageIQ/manageiq#$PR)" || echo "hub not found, not creating PR" git remote rm tmp