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Project Description
missingbits
===========

This package provides several recipes you can use if you find your self duplicating
lots of config. It also has echo, which turned out to be useful for testing.

It was created for a site which uses 1, 3 or 9 zopes depending on a set of conditions.


missingbits:range
-------------------

This recipe takes a string and will make a list out of it. For example, where as you
could write::

[buildout]
parts = cluster

[cluster]
recipe = plone.recipe.cluster
start =
${buildout:bin-directory}/zope0 start
${buildout:bin-directory}/zope1 start
${buildout:bin-directory}/zope2 start
${buildout:bin-directory}/zope3 start
${buildout:bin-directory}/zope4 start
${buildout:bin-directory}/zope5 start
stop =
${buildout:bin-directory}/zope5 stop
${buildout:bin-directory}/zope4 stop
${buildout:bin-directory}/zope3 stop
${buildout:bin-directory}/zope2 stop
${buildout:bin-directory}/zope1 stop
${buildout:bin-directory}/zope0 stop

You can write::

[buildout]
parts = cluster

[zopes]
recipe = missingbits:range
stop = 6
cluster-start = ${{buildout:bin-directory}}/zope{0} start
cluster-stop = ${{buildout:bin-directory}}/zope{0} stop

[cluster]
recipe = plone.recipe.cluster
start = ${zopes:cluster-start.forward}
stop = ${zopes:cluster-stop.reverse}

This is most useful when the number of zopes might vary for different builds of
the same site.

Parameters
~~~~~~~~~~

start
Number to start the range at (Default: 0, Optional)
stop
Number to stop at, but not including. So start of 0 and stop of 6 will get you [0,1,2,3,4,5]. (Mandatory).
step
Number to increment by. (Default: +1, Optional)
foo
Foo is any variable you choose to set on the recipe. A number of duplicates will be made of it and
a newline seperated list placed in an output variable. Any occurence of {0} will be replaced with
a number for the item in the range we are up to. You can delay evaluation of any buildout variables
you are using by escaping them ({{ and }}). If you don't do this, buildout will have to evaluate them
before it evaluates this recipe and you might change the order the parts run in.
foo.forward
If you set a variable called foo on the recipe, it will make a foo.forward. This contains the list
in ascending order.
foo.reverse
If you set a variable called foo on the recipe, it will make a foo.reverse. This contains the list
in descending order.


missingbits:clone
-------------------

I don't like copying and pasting things in buildout, i tend to make mistakes. So I clone instead.

A site with 4 zopes might look something like this::

[buildout]
parts =
zope0
zope1
zope2
zope3

[zope0]
<= instance
http-address = ${hosts:zope}:${ports:zope0}
event-log = /var/log/zope/www.foo.bar.zope0.event.log
z2-log = /var/log/zope/www.foo.bar.zope0.Z2.log

[zope1]
<= instance
http-address = ${hosts:zope}:${ports:zope1}
event-log = /var/log/zope/www.foo.bar.zope1.event.log
z2-log = /var/log/zope/www.foo.bar.zope1.Z2.log

[zope2]
<= instance
http-address = ${hosts:zope}:${ports:zope2}
event-log = /var/log/zope/www.foo.bar.zope2.event.log
z2-log = /var/log/zope/www.foo.bar.zope2.Z2.log

[zope3]
<= instance
http-address = ${hosts:zope}:${ports:zope3}
event-log = /var/log/zope/www.foo.bar.zope3.event.log
z2-log = /var/log/zope/www.foo.bar.zope3.Z2.log

When the number of zopes can change, we really need to make this more manageable. We
could do this instead::

[buildout]
parts = zope-factory

[zope{0}]
<= instance
http-address = ${{hosts:zope}}:${{ports:zope{0}}}
event-log = /var/log/zope/www.foo.bar.zope{0}.event.log
z2-log = /var/log/zope/www.foo.bar.zope{0}.Z2.log

[zope-factory]
recipe = missingbits:clone
template = zope{0}
count = 4

Parameters
~~~~~~~~~~

template
A part to use as a base for cloning. It should not be referenced in parts and it should not be
reference by other parts, especially if it has a recipe. Any buildout variables it has will
need to be escaped by using {{ and }}. Any occurences of {0} will be replaced by the number of
the clone we are on.
start
Number to start the range at (Default: 0, Optional)
stop
Number to stop at, but not including. So start of 0 and stop of 6 will get you [0,1,2,3,4,5]. (Mandatory).
step
Number to increment by. (Default: +1, Optional)
parts
This variable is set by the recipe and contains a list of the parts that were generated. You can
pass it to any recipe taking a list of parts, but you cannot pass it to ${buildout:parts} as
the buildout part is evaluated too early.


missingbits:select
------------------

This recipe can be used to change what configuration is used base on other
variables. For example, it is most excellent when combined with
isotoma.recipe.facts::

[facts]
recipe = isotoma.recipe.facts

[host-lucid]
somesetting = 1

[host-karmic]
somesetting = 2

[host]
recipe = missingbits:select
case = ${facts:lsb.codename}

With this example, you would be able to use ``${host:somesetting}`` and know
that it is suitable for the environment you are in.


missingbits:echo
------------------

While testing these recipes it was handy to have a no-op recipe that just printed
some text. This is that recipe.

You can print text from your buildout like so::

[buildout]
parts = echo

[echo]
recipe = missingbits:echo
echo = Any text you want here


Repository
----------

This software is available from our `recipe repository`_ on github.

.. _`recipe repository`: http://github.com/isotoma/missingbits


License
-------

Copyright 2011 Isotoma Limited

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.



Changelog
=========

0.0.16 (2013-01-23)
-------------------

- Support loading config from absolute paths.


0.0.15 (2012-10-05)
-------------------

- Update to support 1.6.4.


0.0.14 (2012-02-14)
-------------------

- Improve 1.4.3 support.


0.0.13 (2012-02-14)
-------------------

- Only reset variables that are actually in _raw.


0.0.12 (2012-02-14)
-------------------

- Fix packaging.


0.0.11 (2012-02-13)
-------------------

- The act of importing missingbits will monkey-patch the Options object to
give you get_bool and get_list helpers.

- Stack: Default buildout options are no longer chosen over values set in the
stack.

- Stack: More buildout section variables can now be reset from the stack,
in particular the 'unzip', 'allow-picked-versions', 'newest' and
'allowed-eggs-from-site-packages' options.


0.0.10 (2012-02-03)
-------------------

- Add a new recipe called Select. This can be used in conjuction with
isotoma.recipe.facts to customize your buildout based on the environment you
are running it in::

[facts]
recipe = isotoma.recipe.facts

[host-lucid]
somesetting = 1

[host-karmic]
somesetting = 2

[host]
recipe = missingbits:select
case = ${facts:lsb.codename}


0.0.9 (2012-01-30)
------------------

- Add a method for "peeking" at configruation files we haven't loaded yet. This
is useful if you have awkward inter-dependencies like your Plone config knows
its preferred version of Zope, but you can't load it till you have loaded
Zope!

You can use it like this::

value = stack.peek_unloaded("someconfig.cfg", "somesection", "somekey")

- Add a method for "peeking" into data that isn't fully evaluated - data that
is loaded but before you have called ``apply()``. You can use it like this::

value = stack.peek("somesection", "somekey")


0.0.8 (2011-09-21)
------------------

- Don't reset ``self.name`` when resetting things - this works around
``${:path}`` being invalid and the settings the stack uses shouldn't be changing
in flight - its just too weird!


0.0.7 (2011-09-15)
------------------

- Fix optional logic


0.0.6 (2011-09-15)
------------------

- Prior to the injection of any stack configuration, buildout._data is cleared
(with the exception of the buildout and versions parts), causing any already-
resolved parts to be re-resolved once the stack has been applied, and the
original configuration re-applied.


0.0.5 (2011-09-09)
------------------

- Optional config loading support


0.0.4 (2011-09-02)
------------------

- All stacks automatically get a 'path' variable that points to their assets
- Fix sibpath for namespaced modules


0.0.3 (2011-09-02)
------------------

- Add 'Stack': a utility for packaging buildout as an egg.


0.0.2 (2011-08-08)
------------------

- Fix commit missing from merge
- Fix python2.4 support


0.0.1 (2011-08-05)
------------------

- Add overlay recipe

0.0.0 (a long long time ago..)
------------------------------

- Initial release
Release History

Release History

0.0.16

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TODO: Brief introduction on what you do with files - including link to relevant help section.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
missingbits-0.0.16.zip (20.8 kB) Copy SHA256 Checksum SHA256 Source Jan 23, 2013

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