[#44776] [ruby-trunk - Bug #6385][Open] mtime vie File.stat(filename).utime vs File.open(filename, 'r').mtime in Windows — "kolmanv (Kolman Vornovitsky)" <kolmanv@...>

9 messages 2012/05/01

[#44782] [ruby-trunk - Bug #6387][Open] 1.9.3p194 crashed on require in ubuntu — "ywen (Yi Wen)" <hayafirst@...>

12 messages 2012/05/01

[#44795] [ruby-trunk - Bug #6391][Open] Segment Fault while execute make_encmake.rb for Ruby 1.9.3 P194 ( MinGW64) — "raylinn@... (ray linn)" <raylinn@...>

13 messages 2012/05/02

[#44911] [ruby-trunk - Bug #6408][Open] DelegateClass#eql? and <=> don't work as expected — "tenderlovemaking (Aaron Patterson)" <aaron@...>

11 messages 2012/05/06

[#44951] [ruby-trunk - Feature #6414][Open] Destructuring Assignment — "edtsech (Edward Tsech)" <edtsech@...>

14 messages 2012/05/08

[#44958] [ruby-trunk - Feature #6418][Assigned] Supporing a subset of ANSI escape code on Windows — "usa (Usaku NAKAMURA)" <usa@...>

11 messages 2012/05/09

[#45035] [ruby-trunk - Bug #6433][Open] rb_thread_blocking_region(): ubf() function is executed with GVL — ibc (Iñaki Baz Castillo) <ibc@...>

12 messages 2012/05/14

[#45180] [ruby-trunk - Feature #6478][Open] BasicObject#__class__ — "trans (Thomas Sawyer)" <transfire@...>

14 messages 2012/05/22

[#45193] [ruby-trunk - Feature #6482][Open] Add URI requested to Net::HTTP request and response objects — "drbrain (Eric Hodel)" <[email protected]>

16 messages 2012/05/23

[#45198] [ruby-trunk - Feature #6483][Open] parametric map — "prijutme4ty (Ilya Vorontsov)" <prijutme4ty@...>

14 messages 2012/05/23

[#45222] [ruby-trunk - Feature #6492][Open] Inflate all HTTP Content-Encoding: deflate, gzip, x-gzip responses by default — "drbrain (Eric Hodel)" <[email protected]>

23 messages 2012/05/24

[#45252] [ruby-trunk - Feature #6499][Open] Array::zip — "prijutme4ty (Ilya Vorontsov)" <prijutme4ty@...>

14 messages 2012/05/26

[#45272] [ruby-trunk - Feature #6503][Open] Support for the NPN extension to TLS/SSL — "igrigorik (Ilya Grigorik)" <ilya@...>

13 messages 2012/05/27

[#45316] [ruby-trunk - Feature #6515][Open] array.c: added method that verifies if an Array is part of another — "lellisga (Li Ellis Galardo)" <lellisga@...>

14 messages 2012/05/30

[ruby-core:44840] [ruby-trunk - Feature #6376] Feature lookup and checking if feature is loaded

From: "trans (Thomas Sawyer)" <transfire@...>
Date: 2012-05-03 05:04:54 UTC
List: ruby-core #44840
Issue #6376 has been updated by trans (Thomas Sawyer).


I think it depends. For on thing, a library's api can change over time. So that might not be the best fit, if what your asking is if library `xyz` is being used?. That's a more general question. Two different libraries might share some of the same module namespaces.

----------------------------------------
Feature #6376: Feature lookup and checking if feature is loaded
https://bugs.ruby-lang.org/issues/6376#change-26415

Author: trans (Thomas Sawyer)
Status: Feedback
Priority: Normal
Assignee: 
Category: core
Target version: 2.0.0


$LOADED_FEATURES is useful to know what "files" have been loaded. But it doesn't really tell us what "features" have been loaded. If there where were a way to look-up a load path, without actually loading it then it would be possible to compare that to $LOADED_FEATURES and thus know. e.g.

    require 'ostruct'
    $LOADED_FEATURES #=> [..., "/home/trans/.local/lib/ry/rubies/1.9.3-p125/lib/ruby/1.9.1/ostruct.rb"]

    path = require_path('ostruct') #=> "/home/trans/.local/lib/ry/rubies/1.9.3-p125/lib/ruby/1.9.1/ostruct.rb"
    $LOADED_FEATURES.include?(path)

Of course, it would be nice to also have:

    required?('ostruct')  #=> true

These methods could be class methods of special module, if it's important to keep the Kernel more tidy, e.g. `Ruby.required?('ostruct')`.

I am currently working on a project where I need this (and have a couple of other projects that could use it too) and I've had to implement the whole thing from scratch, which isn't simple, nor fast, nor am I 100% confident that it specs exactly to Ruby's own lookup procedure. So it would be much better if Ruby would expose its lookup functionality.




-- 
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