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Re: Added builtins per runtime
- X-seq: zsh-workers 27944
- From: Christoph Kappel <unexist@xxxxxxxxxxxxx>
- To: <schaefer@xxxxxxxxxxxxxxxx>
- Subject: Re: Added builtins per runtime
- Date: Sun, 02 May 2010 19:28:55 +0200
- Cc: <zsh-workers@xxxxxxx>
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I stopped relying on the docs and started reading the code as I should have done
from start directly - it's FOSS after all and the docs of my project aren't even close
of being accurate too. ;)
I currently have two builtins, one just evals ruby code in the vm and returns the
result and another one that creates a new builtin. The first new builtin works w/o
problems, any further is either unknown or zsh segfaults so I need some more
code reading/testing there.
Looks like this:
~> zmodload zsh/ruby
~> reval "RUBY_VERSION"
~> rdef 'def bar(n); "-" * n.to_i; end'
~> bar 20
Basically I am just maintaining an array of builtins myself and call addbuiltins()
inside of my module whenever a new builtin should be added. Due the
BINF_ADDED flag the builtins will be defined once which is fine.
---- On Sun, 02 May 2010 11:08:21 +0200 Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx> wrote ----
>On Sat, May 1, 2010 at 2:02 PM, Christoph Kappel <unexist@xxxxxxxxxxxxx> wrote:
>> That was exactly my question. Can a module change it's features per runtime?
>There doesn't appear to be any reason that a module could not provide
>a builtin (or even, I suppose, a parameter) that modifies the module's
>own features array on the fly. The effect would need to be the same
>as if "zmodload -F" had been invoked to enable the newly-materialized
>> Generally the use of the word feature in the doc is really confusing, reading the
>> coding makes it's even worse when a feature struct contains lists of builtins,
>> condistions etc. which are called features too.
>> The doc also doesn't make very clear what abstracts.
>The concept of features (as in the feature struct) was only recently
>introduced, and was layered on top of the existing implementation of
>builtins/parameters/etc. The abstraction may therefore be a bit less
>clean than one would find if it had been designed from scratch.
>> I basically want to provide a builtin/feature/whatever that provides a way to add
>> actions in another language - ruby in my case.
>I suspect that what you mean by this is that you intend to link a ruby
>interpreter to zsh, and you want to permit interpreted functions
>defined in ruby to appear on the fly as builtin commands from the
>point of view of the zsh interpreter. It might be possible to do
>that, because the same C function defined in the module can be called
>under multiple names. However, I'd suggest that you start by having a
>single builtin that invokes the ruby interpreter and pass it the name
>of the ruby function as its first argument, rather than attempt to
>create a new builtin for every function.
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