Issue #8542 has been reported by Daniel Pittman.
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Feature #8542: Implement type checking/coercion for *positional* action args
https://projects.puppetlabs.com/issues/8542
Author: Daniel Pittman
Status: Accepted
Priority: Normal
Assignee:
Category: Faces
Target version:
Affected Puppet version:
Keywords:
Branch:
As part of #6780, we identified a need to perform the same sort of type
checking and coercion for positional arguments that we do for named arguments
(aka options).
This is valuable for things like, for example, getting the `puppet status`
invocation through the indirector working correctly. (See #7123, but the
precis is that `puppet status` should end up invoking `puppet status find
dummy` to work around limitations of the indirector.)
The visible part of the implementation is:
<pre>
action :foo do
option "--alpha" # ...sets type checking stuff
option "--beta" # ditto
parameters :alpha, :beta
when_invoked do |alpha, beta, options|
# ...magic happens
end
end
</pre>
The `parameters` declaration maps named options into positional parameters by
explicitly declaring their order and name; the regular options stuff makes it
possible to document, type, and all other things those arguments.
Then, the invocation code can identify what the appropriate types for each
positional argument are.
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