Setuptools extension to release an egg
Report any bug or feature requests to : http://trac.ingeniweb.com
iw.releaser provides command line utilities to make it easier to release and deploy zc.buildout/subversion based projects.
- new setuptools commands
- release: used to release an egg-based package
- build_mo: used to search and compile .po file
- console scripts
- project_release: used to release a buildout based project
- project_deploy: used to deploy a buildout based project
- project_copy_eggs: used to collect all eggs used in a project
- project_md5: used to compute the MD5 hash of a buildout project
- a hook to be able to launch actions when a package is released, with a default one that sends an email on each release.
- a paste template to create a project structure
To install iw.releaser, you just need to run easy_install:
$ easy_install iw.releaser
or you can launch its setup if you have downloaded it:
$ python setup.py install
To work with iw.releaser, let’s do a small tutorial on how to create a buildbout-based project. This is done in a few steps:
- setting up your environement
- creating the project structure
- creating egg-based packages
- releasing eggs
- releasing the buildout
- upgrading an existing buildout
The first thing to do to work smoothly with zc.buildout is to set up a few things on your environment to make sure you can run all kind of buildout-based applications.
Put two files in your home directory:
HOME/.buildout/.httpauth: this file will contain the authentication informations when the system tries to reach a http ressource which is password protected (like a svn or a private web site). It is a text file where each line is: realm,url,user,password
This is used bu lovely.buildouthttp.
HOME/.buildout/default.cfg: this file set some defaults values, so zc.buildout can cache and spare downloaded eggs.
[buildout] download-cache = /home/tarek/.buildout/downloads eggs-directory = /home/tarek/.buildout/eggs
Next, you need to make sure you can release your eggs to several targets, because some private eggs are not to be published at the cheeseshop. At this time, the only software that provides the same web services than Cheeseshop is Plone Software Center >= 1.5.
To make it possible to handle several cheeseshop-like servers, we need to install a small addon, called iw.dist:
$ easy_install iw.dist
This will allow you to define several servers in .pypirc. For instance if you are working with a private cheeseshop-like server you can define it like this in HOME/.pypirc
[distutils] index-servers = pypi ingeniweb-public [pypi] username:ingeniweb password:secret [ingeniweb-public] repository:http://products.ingeniweb.com/catalog username:ingeniweb password:secret
Last, you need to define the release strategy configuration, that will define for each target server the list packages that must be released there (regular expressions) and the command sequence that is used with setup.py. Here’s a default example, that can be added in your .pypirc as well, by completing the sections with release-command and release-packages variables:
... [ingeniweb-public] ... release-command = mregister sdist build_mo bdist_egg mupload release-packages = ^iw\..* [pypi] ... release-command = mregister sdist build_mo bdist_egg mupload release-packages = ^plone\..* ^collective\..*
This will push all eggs that starts with plone. or collective. to Pypi and all eggs that starts with iw. to ingeniweb-public. The command used to push the packages are defined by command.
Every project must be structurized the same way:
$ paster create -t iw_plone_project my_project
This will ask you for a few values:
- project_name: the name of the project
- project_repo: the root of the subversion repository
- some more values that can be left to default.
This will generate a set of folders in my_project:
$ ls my_project ./buildout ./bundles ./docs ./packages ./releases
Each folder has a role:
- buildout: contains the buildout
- bundles: contains the bundle used to work in develop mode
- docs: contains the docs
- packages: contains the egg-based package
- releases: contains the releases of the buildout
This structure must be commited in your subversion:
$ svn import my_project http://some.svn/my_project -m "initial commit"
You will then be able to work in your buildout.
From there you can add some packages into the project, by putting them in the packages folder, by using any template available in ZopeSkel.
be carefull though, to use a trunk/tags/branches in packages for each project
$ cd my_projet/packages $ paster create -t plone plone.example $ mv plone.example trunk $ mkdir plone.example $ mv trunk plone.example/ $ mkdir plone.example/tags plone.example/branches $ svn add plone.example $ svn ci -m "initial import of plone.example"
Do not use trunk as a package name with paster, as this will generate bad metadata in the package
A special section can be added into setup.cfg, in order to send a mail everytime the package is released:
[mail_hook] hook = iw.releaser:mail from = firstname.lastname@example.org emails = email@example.com
If your system does not have a SMTP servern you will need to add in that case the name of a SMTP server, and its port in your .pypirc file, in a mail_hook section:
[mail_hook] host = smtp.neuf.fr port = 25
From there you can bind the package to your buildout, with a develop variable, in your my_project/buildout folder:
[buildout] ... develop= .../packages/monprojet.reports/trunk
The bundle folder can also be used to set svn:externals to make it simpler to work in the buildout.
Releasing eggs is done by calling release from a package:
$ python setup.py release running release This package is version 0.1.2 Do you want to run tests before releasing ? [y/N]: N Do you want to create the release ? If no, you will just be able to deploy again the current release [y/N]: Y Enter a version [0.1.2]: 0.1.2 Commiting changes... Creating branches... ...
This will take care of:
- upgrading the setup.py version
- creating a branch and a tag in svn
- pushing the package to the various cheeseshop-like servers
- sending a mail with the changes, if the mail_hook section was provided in setup.cfg
Releasing the project consists of calling project_release then project_deploy.
project_release will just create a new branch in subversion:
$ cd my_project/buildout $ project_release What version you are releasing ? 0.1 Added version file.
This will copy my_project/buildout to my_project/releases/0.1 in subversion. You can then work in this release, to pinpoint the versions in your buildout. A good practice is to create a dedicated cfg file for deployment.
The next step is to generate a tarball with project_deploy:
$ cd /tmp $ svn co http://somesvn/my_projet/releases/0.1 my_project $ cd my_project $ project_deploy prod.cfg
This will build a tarball in /tmp using virtualenv, and set everything up so the buildout can be reinstalled offline anywhere with this archive.
So the result can be installed with the two lines:
$ python boostrap.py $ bin/buildout
To upgrade an existing buildout, you can use the project_eggs command. It will create a tarball with all eggs needed to run the project and the .cfg file.
Run it in your buildout, by pointing the .cfg and by providing a name of the archive:
$ project_eggs buildout.cfg /tmp/upgrade.tgz
You can even give a filter to collect specific packages with glob-like names, separated by commas:
$ project_eggs buildout.cfg /tmp/upgrade.tgz "iw.*,plone.*"
This filter will only get the eggs starting with iw. and plone.. This is useful when you have changed only a few eggs, and want to reduce the size of the tarball for the upgrade.
Doing an upgrade will then consist of calling:
$ cp upgrade.tgz my_project/ $ cd my_project $ tar -xzvf upgrade.tgz $ bin/buildout
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