Mailinglist Archive: yast-devel (54 mails)

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Re: [yast-devel] Yast Development after SLE 12: RYCP
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Am 12.06.2014 18:17, schrieb Martin Vidner:
On Thu, Jun 12, 2014 at 04:30:06PM +0200, Lukas Ocilka wrote:
The current Yast code that we will have in SLE 12 is partly
automagically translated from YCP to kind of Ruby (also called
RYCP), is still using many YCP-like methods for backward
compatibility. Partly - because we have already cleaned up some
pieces when touching them, following the Boy-Scout Rule [#1] and
so the feel quite OK. Of course, we will not be able to cleanup
everything we wanted and when SLE 12 is out, we will have to
maintain the codebase for years.

I want to prototype a tool to help with converting Rubified YCP to
idiomatic Ruby.

I want to try different levels:

- An "aggressive" conversion, which converts *all* Ops and Builtin
calls in a file assuming tests are in place to catch bugs,

- A "safe" conversion which leaves functoinality the same even if
the dreaded nil sneaks in. Like replacing Builtins.getenv(foo) with
ENV[foo]. Or using a simple static analysis to deduce that a
variable cannot be nil, like in @help = "" @help = Ops.add(@help,
"Part 1 of 42...") @help = Ops.add(@help, "Part 2 of 42...")

Getting rid of the Ops and Builtins calls (what about Convert?) would
make the code much more readable. But I see only chance for "safe"
conversion (because of missing tests).

David sent me a link to
http://whitequark.org/blog/2013/04/26/lets-play-with-ruby-code/
which points to a library that was used to convert between RSpec 2
and RSpec 3 (which is a nontrivial task defeating regex hacks)

[rest of the mail]
will reply tomorrow



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