hexagonit.recipe.cmmi 1.1.1

zc.buildout recipe for compiling and installing source distributions.

Contents

• Change History

  • 1.1.1

  • 1.1.0

  • 1.0.1

  • 1.0.0

• Detailed Documentation

  • Supported options

  • Example usage

  • Installing checkouts

  • Advanced configuration

  • Customizing the build process

• Download

The recipe provides the means to compile and install source distributions using configure and make. It is inspired by the zc.recipe.cmmi recipe but provides more control over the build process.

Change History

1.1.1

• Don’t try to execute hooks if the option is an empty string. This will make it possible to disable hooks when extending existing parts.

1.1.0

• Added new option path to allow building and installing local source trees. The path option is mutually exclusive with url.

1.0.1

• Fixed a bug with ‘keep-compile-dir’ option. The location of the compilation directory was not available through the options['compile-directory'] option as documented.

1.0.0

• Initial public release.

Detailed Documentation

Supported options

url

URL to the package that will be downloaded and extracted. The supported package formats are .tar.gz, .tar.bz2, and .zip. The value must be a full URL, e.g. http://python.org/ftp/python/2.4.4/Python-2.4.4.tgz. The path option can not be used at the same time with url.

path

Path to a local directory containing the source code to be built and installed. The directory must contain the configure script. The url option can not be used at the same time with path.

md5sum

MD5 checksum for the package file. If available the MD5 checksum of the downloaded package will be compared to this value and if the values do not match the execution of the recipe will fail.

make-binary

Path to the make program. Defaults to ‘make’ which should work on any system that has the make program available in the system PATH.

make-targets

Targets for the make command. Defaults to ‘install’ which will be enough to install most software packages. You only need to use this if you want to build alternate targets. Each target must be given on a separate line.

configure-options

Extra options to be given to the configure script. By default only the --prefix option is passed which is set to the part directory. Each option must be given on a separate line. Note that in addition to configure options you can also pass in environment variables such as CFLAGS and LDFLAGS to control the build process.

patch-binary

Path to the patch program. Defaults to ‘patch’ which should work on any system that has the patch program available in the system PATH.

patch-options

Options passed to the patch program. Defaults to -p0.

patches

List of patch files to the applied to the extracted source. Each file should be given on a separate line.

pre-configure-hook

Custom python script that will be executed before running the configure script. The format of the options is:

/path/to/the/module.py:name_of_callable

where the first part is a filesystem path to the python module and the second part is the name of the callable in the module that will be called. The callable will be passed two parameters: the options dictionary from the recipe and the global buildout dictionary. The callable is not expected to return anything.

pre-make-hook

Custom python script that will be executed before running make. The format and semantics are the same as with the pre-configure-hook option.

post-make-hook

Custom python script that will be executed after running make. The format and semantics are the same as with the pre-configure-hook option.

keep-compile-dir

Switch to optionally keep the temporary directory where the package was compiled. This is mostly useful for other recipes that use this recipe to compile a software but wish to do some additional steps not handled by this recipe. The location of the compile directory is stored in options['compile-directory']. Accepted values are ‘true’ or ‘false’, defaults to ‘false’.

Additionally, the recipe honors the download-directory option set in the [buildout] section and stores the downloaded files under it. If the value is not set a directory called downloads will be created in the root of the buildout and the download-directory option set accordingly.

The recipe will first check if there is a local copy of the package before downloading it from the net. Files can be shared among different buildouts by setting the download-directory to the same location.

Example usage

We’ll use a simple tarball to demonstrate the recipe.

>>> import os.path
>>> src = join(os.path.dirname(__file__), 'testdata')
>>> ls(src)
d .svn
- package-0.0.0.tar.gz

The package contains a dummy configure script that will simply echo the options it was called with and create a Makefile that will do the same.

Let’s create a buildout to build and install the package.

>>> write('buildout.cfg',
... """
... [buildout]
... parts = package
...
... [package]
... recipe = hexagonit.recipe.cmmi
... url = file://%s/package-0.0.0.tar.gz
... """ % src)

This will download, extract and build our demo package with the default build options.

>>> print system(buildout)
Installing package.
package: Creating download directory: /sample_buildout/downloads
package: Extracting package to /sample_buildout/parts/package__compile__
configure --prefix=/sample_buildout/parts/package
building package
installing package

As we can see the configure script was called with the --prefix option by default followed by calls to make and make install.

Installing checkouts

Sometimes instead of downloading and building an existing tarball we need to work with code that is already available on the filesystem, for example an SVN checkout.

Instead of providing the url option we will provide a path option to the directory containing the source code.

Let’s demonstrate this by first unpacking our test package to the filesystem and building that.

>>> checkout_dir = tmpdir('checkout')
>>> import setuptools.archive_util
>>> setuptools.archive_util.unpack_archive('%s/package-0.0.0.tar.gz' % src,
...                                        checkout_dir)
>>> ls(checkout_dir)
d package-0.0.0

>>> write('buildout.cfg',
... """
... [buildout]
... parts = package
...
... [package]
... recipe = hexagonit.recipe.cmmi
... path = %s/package-0.0.0
... """ % checkout_dir)

>>> print system(buildout)
Uninstalling package.
Installing package.
package: Using local source directory: /checkout/package-0.0.0
configure --prefix=/sample_buildout/parts/package
building package
installing package

Since using the path implies that the source code has been acquired outside of the control of the recipe also the responsibility of managing it is outside of the recipe.

Depending on the software you may need to manually run make clean etc. between buildout runs if you make changes to the code. Also, the keep-compile-dir has no effect when path is used.

Advanced configuration

The above options are enough to build most packages. However, in some cases it is not enough and we need to control the build process more. Let’s try again with a new buildout and provide more options.

>>> write('buildout.cfg',
... """
... [buildout]
... parts = package
...
... [package]
... recipe = hexagonit.recipe.cmmi
... url = file://%(src)s/package-0.0.0.tar.gz
... md5sum = 6b94295c042a91ea3203857326bc9209
... configure-options =
...     --with-threads
...     --without-foobar
...     CFLAGS=-I/sw/include
...     LDFLAGS=-L/sw/lib
... make-targets =
...     install
...     install-lib
... patches =
...     patches/configure.patch
...     patches/Makefile.dist.patch
... """ % dict(src=src))

This configuration uses custom configure options, multiple make targets and also patches the source code before the scripts are run.

>>> print system(buildout)
Uninstalling package.
Installing package.
package: Using a cached copy from /sample_buildout/downloads/package-0.0.0.tar.gz
package: MD5 checksum OK
package: Extracting package to /sample_buildout/parts/package__compile__
package: Applying patches
patching file configure
patching file Makefile.dist
patched-configure --prefix=/sample_buildout/parts/package --with-threads --without-foobar CFLAGS=-I/sw/include LDFLAGS=-L/sw/lib
building patched package
installing patched package
installing patched package-lib

Customizing the build process

Sometimes even the above is not enough and you need to be able to control the process in even more detail. One such use case would be to perform dynamic substitutions on the source code (possible based on information from the buildout) which cannot be done with static patches or to simply run arbitrary commands.

The recipe allows you to write custom python scripts that hook into the build process. You can define a script to be run:

• before the configure script is executed (pre-configure-hook)

• before the make process is executed (pre-make-hook)

• after the make process is finished (post-make-hook)

Each option needs to contain the following information

/full/path/to/the/python/module.py:name_of_callable

where the callable object (here name_of_callable) is expected to take two parameters, the options dictionary from the recipe and the global buildout dictionary.

Let’s create a simple python script to demonstrate the functionality. You can naturally have separate scripts for each hook or simply use just one or two hooks. Here we use just a single module.

>>> hooks = tmpdir('hooks')
>>> write(hooks, 'customhandlers.py',
... """
... import logging
... log = logging.getLogger('hook')
...
... def preconfigure(options, buildout):
...     log.info('This is pre-configure-hook!')
...
... def premake(options, buildout):
...     log.info('This is pre-make-hook!')
...
... def postmake(options, buildout):
...     log.info('This is post-make-hook!')
...
... """)

and a new buildout to try it out

>>> write('buildout.cfg',
... """
... [buildout]
... parts = package
...
... [package]
... recipe = hexagonit.recipe.cmmi
... url = file://%(src)s/package-0.0.0.tar.gz
... pre-configure-hook = %(module)s:preconfigure
... pre-make-hook = %(module)s:premake
... post-make-hook = %(module)s:postmake
... """ % dict(src=src, module='%s/customhandlers.py' % hooks))

>>> print system(buildout)
Uninstalling package.
Installing package.
package: Using a cached copy from /sample_buildout/downloads/package-0.0.0.tar.gz
package: Extracting package to /sample_buildout/parts/package__compile__
package: Executing pre-configure-hook
hook: This is pre-configure-hook!
configure --prefix=/sample_buildout/parts/package
package: Executing pre-make-hook
hook: This is pre-make-hook!
building package
installing package
package: Executing post-make-hook
hook: This is post-make-hook!

For even more specific needs you can write your own recipe that uses hexagonit.recipe.cmmi and set the keep-compile-dir option to true. You can then continue from where this recipe finished by reading the location of the compile directory from options['compile-directory'] from your own recipe.

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