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= What is Eclipse Fedora Packager? =
 
= What is Eclipse Fedora Packager? =
  

Revision as of 02:30, 28 October 2010

What is Eclipse Fedora Packager?

Eclipse Fedora Packager is a plug-in for Eclipse. It helps Fedora packagers who are used to IDEs (such as Eclipse IDE), to package their Fedora RPMs from within Eclipse without needing to resort to the command line. (at least for the most part :-) ).

Some features included in the Eclipse Fedora Packager are:

  • Conveniently clone Fedora Git projects
  • RPM-spec-file editor with syntax highlighting, auto-completion and changelog support (<Ctrl>+<Alt>+C keyboard shortcut)
  • Download source files and upload new source files
  • Prepare local builds (execute %prep section of your spec-file only)
  • Create source RPM files based on current spec-file
  • Execute local builds
  • Push builds to Koji (the Fedora build system)
  • Mock builds
  • Push Bodhi updates
  • Eclipse Git support (via EGit, please refer to EGit documentation)

Eclipse Fedora Packager has been available for Fedora users since F14. Want to try it out? Issue the following command to install it:

yum install eclipse-fedorapackager

Using Eclipse Fedorapackager

Since Fedora 14, the Git version control system for keeping track of files required for Fedora packaging is used. See the dist-git documentation for in depth information about dist-git. Fortunately, how dist-git works when using the Eclipse Fedora Packager plug-in is unimportant. There is only a slightly different approach for doing packaging work compared to what might have been used with CVS instead of Git.

Initial Setup

This step is only required to be completed once for a new Fedora packager or if using a new machine that does not have required FAS certificates set up. When it is certain this is correct it is safe to skip this step. The following explains how to set up those certificates for a FAS account?

First, install the fedora-packager RPM package:

yum install fedora-packager

Then run the following command and simply follow the instructions provided:

$ fedora-packager-setup

Once this is done Eclipse Fedorapackager is ready for use. Fire up Eclipse. Let's get started. Yay!

Importing a Fedora Git Project

Getting started is easy. Go to "File" => "Import" => "Git" => "Projects from Fedora Git". This will clone the desired Git repository and create necessary local branches. For convenience, the "Git Repositories" view will also open once the clone process has finished.

ImportFedoraGit.png

Here's how the Fedora Git import dialog looks like. Next, specify the package name that will then be prepared for you.

Image:SelectPackageNameGit.png

Once the new project has been created something akin to the following is seen. Note the branches in the Git Repository view and "[eclipse-fedorapackager master]" right beside the project name. In this case, eclipse-fedorapackager refers to the Git repository name and master to the currently checked out branch.

GitProjectBranchesView.png

Fedora Packaging Work

After a Fedora Git project has been created, all files required for packaging the desired release can be found in the created Eclipse project directly. For example, files for release Fedora 13 correspond to files present in the Eclipse project one switched to branch f13/master. Files in branch master correspond to Fedora rawhide, the current development release of Fedora. The following is a brief description of things to consider doing while packaging up some software. Working in a different sequence works, but keep in mind that before trying a Koji build push your locally committed changes to the public repository.

Uploading Source Files Required for a Package

In order to upload new sources in Eclipse Fedora Packager, first download upstream sources and place the downloaded sources in the same folder as the Eclipse project. If this is done outside of Eclipse, don't forget to refresh the project afterwards (F5) so that the file actually shows up. A slick way to download sources is to use RPM editor functionality directly. See its documentation for more information on this. Once the new source file is available in the project, it can be uploaded to the lookaside cache by right-clicking on the file=> "Fedora Packager" => Upload This File => Replace/Add File. This either adds the file to the sources required to build the package or replaces the current content of the sources file to contain a single line with the MD5 sum of the file selected.

A valid certificate is required to upload to the lookaside cache. If it has expired, a new one can be created by issuing the following command on a terminal:

$ fedora-cert -n

Downloading Source Files Required for a Package

To download the required source files for an existing package in order to build it, right-click on the spec-file => "Fedora Packager" => Download Sources. This downloads all sources listed in the file sources.

Using the Spec-File Editor

Eclipse Fedora Packager uses the RPM Editor and ChangeLog plug-in from the Eclipse Linux Tools project (http://www.eclipse.org/linuxtools). For instance, a new ChangeLog entry can easily be created in the spec-file by using the <CTRL>+<ALT>+C keyboard shortcut (though a good idea is to set appropriate “ChangeLog” preferences first). Using <CTRL>+<SPACE> auto-completes locally installed packages. Also, rpmlint can be run by right-clicking on the spec-file => “Run Rpmlint”. For more information have a look at the spec-file editor screencast: http://www.eclipse.org/downloads/download.php?file=/technology/linuxtools/videos/specfile-demo.ogg or at the "Specfile Editor User Guide": Help => Help Contents => Specfile Editor User Guide.

Committing Changes to the Local Git Repository

After the spec-file, patches etc. have been added/changed, commit those changes to the repository. This is done by:

  1. Selecting the files to commit (alternatively select the Fedora Git project and select desired unstaged files when the commit dialog is shown)
  2. Right-click, "Team" => "Commit..."

GitCommit.png

Switching Branches (Git Checkout)

Switching branches is as easy as double-clicking on the desired local branch to be worked on. The currently checked out branch is indicated to the left of the project name. Make sure to commit, revert, or stash changes before switching to a different branch. Refer to the Git and EGit documentation for more information on this.

Prepare Sources for a Local Build

Eclipse Fedora Packager will download and prepare sources by right-clicking on the spec-file => “Fedora Packager” => “Prepare Sources for Build”.

PrepareSourcesForBuild.png

Build RPM for a Local Architecture

This is a great way to test if the spec-file actually builds at all. Once the RPM has been successfully built locally, it is recommended further testing be carried out on the spec-file by completing a build in a chroot'ed environment using {{{mock}}}. Both ways are supported by Eclipse Fedora Packager.

The RPM can be built locally by selecting the spec-file => right-click => “Fedora Packager” => “Build for Local Architecture”. Output of the RPM build will appear on the Eclipse console.

Using mock-builds is a great way to test the “Requires/BuildRequires” of a spec-file. Select the spec-file => right-click => “Fedora Packager” => “Local Build Using Mock”. Be aware that this may take a long time (>20 minutes) and requires the mock package to be installed. Use Eclipse's “Run in Background” functionality for convenience.

Make Locally Committed Changes Public (Git Push)

The changes are ready to be pushed (or published) publicly when the locally committed changes are satisfying. Remember, Git allows history to be rewritten before changes are made public. See the Git and EGit documentation for more information. To bring the local repository in sync with origin:

  1. Select the Fedora Git project
  2. Right-click, "Team" => "Push..."
  3. Select the Git repository to be pushed to (usually this is kept unchanged)
  4. Select the Git references to be pushed
  5. Carry out the push operation

The Git push dialog.

Git push dialog

Select the Git references to push. In this example, branches master and f14/master will get pushed. Keep in mind that source and destination references are the same for Eclipse Fedora Packager. Clicking the “Add all branches spec” button is a convenience that pushes all commits to all local branches.

Select Git References

Pushing a Build to Koji

Once satisfied with a spec-file, upload the sources of the package, commit the changes to the local repository, and then push the local changes to the remote repository. When this is done, push a build to Koji by right-clicking the spec-file => “Fedora Packager” => “Push to Koji”.

EclipseFedoraPackagerPushBuildToKoji.png

Eclipse will pop up a message with the Koji URL to track your build. This is an example of how the message may look:

KojiBuildPopupMessage.png

This should be enough information to track the builds.

Pushing a Bohi Update

After successfully building the RPMs, use Eclipse Fedora Packager to push an update for those packages. To do so, select the spec-file => right click => "Fedora Packager" => "Bodhi Update". When creating a Bodhi update using Eclipse Fedora Packager, similar information is required as needed by the Bodhi Web interface. Once an update has successfully been created, the pushed update will be visible on the Bodhi updates website. The status of updates can also be tracked there.

Feedback/Reporting Bugs

If a bug is found in the Eclipse Fedora Packager, please feel free to open a ticket at https://fedorahosted.org/eclipse-fedorapackager/report/1 (a FAS username is required to create tickets). Alternatively, try this query on RedHat Bugzilla in order to find already existing bugs. Thanks!