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Explain in the doc how to create a global dependency

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Ricardo Catalinas Jiménez 2014-09-21 17:59:38 +01:00
parent 9184c310f2
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25
docs/man/man7/cdist-manifest.text
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@ -125,7 +125,7 @@ requirements can be added white space separated.
-------------------------------------------------------------------------------- --------------------------------------------------------------------------------
Above the "require" variable is only set for the command that is Above the "require" variable is only set for the command that is
immediately following it. Dependencies should allways be declared that way. immediately following it. Dependencies should always be declared that way.
On line 4 you can see that the instantion of a type "\__link" object needs On line 4 you can see that the instantion of a type "\__link" object needs
the object "__file/etc/cdist-configured" to be present, before it can proceed. the object "__file/etc/cdist-configured" to be present, before it can proceed.
@ -136,6 +136,29 @@ to be created. The task of cdist is to make sure, that the dependency will be
resolved appropriately and thus "\__file/etc/cdist-configured" be created resolved appropriately and thus "\__file/etc/cdist-configured" be created
if necessary before "__link" proceeds (or to abort execution with an error). if necessary before "__link" proceeds (or to abort execution with an error).
If you really need to make all types depend on a common dependency, you can
export the "require" variable as well. But then, if you need to add extra
dependencies to a specific type, you have to make sure that you append these
to the globally already defined one.
--------------------------------------------------------------------------------
# First of all, update the package index
__package_update_index
# Upgrade all the installed packages afterwards
require="__package_update_index" __package_upgrade_all
# Create a common dependency for all the next types so that they get to
# be executed only after the package upgrade has finished
export require="__package_upgrade_all"
# Ensure that lighttpd is installed after we have upgraded all the packages
__package lighttpd --state present
# Ensure that munin is installed after lighttpd is present and after all
# the packages are upgraded
require="$require __package/lighttpd" __package munin --state present
--------------------------------------------------------------------------------
All objects that are created in a type manifest are automatically required All objects that are created in a type manifest are automatically required
from the type that is calling them. This is called "autorequirement" in from the type that is calling them. This is called "autorequirement" in
cdist jargon. cdist jargon.