Extension rbz maker

driven

My plugin does not contain files Skb but SKP.

your image above shows both in the folder

Is there a way to protect the SKP files ?
No, even if there was, once it's in the model people can do anything they want...

Dan Rathbun

@tntdavid said:

I downloaded the file rubyzip2-2.0.2.gem

Do not use that. It is actually an older code fork than just plain rubyzip v1.1.6.

(Not sure why the author left it up on rubygems.org. It is a kind of beta version for Ruby higher than 1.8, but was abandoned. The original v1 code trunk was fixed to run in 1.9+ Ruby.)

driven

@dan what's happening with require 'rubyzip' v require 'zip' ?

Dan Rathbun

@driven said:

@dan what's happening with require 'rubyzip' v require 'zip' ?

The RubyGems extension modifies the global require() method so that it can load gems (and push their paths into $LOAD_PATH,) and if need be, install them first from whatever gem servers are registered. (By default only rubygems.org is registered.)
So [important], this: require 'rubyzip', is actually saying "require the gem named 'rubyzip'", not "require the file named 'rubyzip.rb'".

Once the gem library is installed and loaded, it can be used as it normally would, had it been a standard extension, in Ruby's library.
Hence, the require("zip") which actually makes sure that the
"#{ENV['GEM_PATH']}/gems/rubyzip-v1.1.6/lib/zip.rb" file is loaded.
This works because the override of the global require(), by the RubyGems extension, has push the rubyzip lib into the $LOAD_PATH array. Ie:
"#{ENV['GEM_PATH']}/gems/rubyzip-v1.1.6/lib/"

But I like to wrap in begin. .. rescue, just in case.

driven

cheers dan,
another ?
in your example code wont require 'rubyzip' always fail, even when require 'zip' returns true?

john

Dan Rathbun

@driven said:

in your example code wont require 'rubyzip' always fail, even when require 'zip' returns true?

Hmmm.. OH I see.. even though, given the following:
Ref:

@unknownuser said:

When RubyGems is required, Kernel#require is replaced with our own which

is capable of loading gems on demand.

When you call require 'x', this is what happens:

* If the file can be loaded from the existing Ruby loadpath, it is.

* Otherwise, installed gems are searched for a file that matches.

If it's found in gem 'y', that gem is activated (added to the

loadpath).

The normal require functionality of returning false if

that file has already been loaded is preserved.

Something I overlooked was, that in most gems, the gem "name" is the same as the gem loader script name.

But in this gem, the name is "rubyzip", but the loader script name is "zip.rb".

So what the overridden require does is, look for a loader script named "rubyzip.rb" and it will NEVER find it, so a LoadError exception will be raised, always, even if the gem is already installed, and even if it is already loaded.

And then my rescue LoadError clause will be fired.

This doesn't hurt the first time, as if SketchUp is started normally and Rubygems is loaded and working.. the "rubyzip" gem will get installed and/or initialized by my LoadError clause.

OK I need to change things a bit. I used to have a bail out " return true if defined?(Zip)" as the first line, removed it when I tried to load the "zip/filesystem" extension in the same methoid. I moved that to it's own method, so I'll put the short-circuit return line back in.

Then I may need a different basic test other than require("rubyzip").
I am not actually using the return value of require("rubyzip") to make any boolean decisions.
Perhaps just require("zip") ?

pgarmyn

@tntdavid said:

I want to blur my fichiers.rb to protect my work, so I downloaded the Plugin BGSketchup_RBZ_maker v1.0.1.rbz

RBZ-files are not intended to protect code. Any unzip program can be used the convert them back to the original files.
Only the scrambler will give limited protection.

TNTDAVID

pgarmyn

I can assure you that RBZ maker convert my file "rb" in "rbs" !

Although the RBZ file can be decompressed the code is protected

driven

You're right for the skb! This is fixed now

TNTDAVID

I just noticed a very annoying problem !

RBZ maker produces non-compatible files rbs with Sketchup 8
I think many users are still under licenses "Sketchup 8" and wishes propose a PLUGIN which works for a maximum of users.

Is there an alternative to produce rbs files ?

driven

what's the error message on v8 say?

I'd be surprised if the .rbs is unusable, does it run as a .rb on the same machine?

have DC's been enabled on that machine?

john

Dan Rathbun

Make sure your files are UTF-8 Encoded Without BOM.

TNTDAVID

There is no error message the launch of Sketchup !

Error 01: The toolbar will no longer display the images on the icons.

Error 02: The relationship between icons and components is lost.

driven

are you still using

 path_to_components = File.join(File.dirname(__FILE__), 'Components')

I'm unsure if that works from inside a rbs, I remember there was some problem with it...

TNTDAVID

Yes ! So how can I do otherwise ?

driven

@tntdavid said:

Yes ! So how can I do otherwise ? :shock:

It's hard without knowing your folder structure...
once installed from rbz
you should have a plain 'extension' .rb file and a same name folder...
inside the folder you should have a plain .rb 'loader' file
that loads the .rbs file
plus any other folders...

is that how it is set up?
post a screen shot of the folder structure...

john

TNTDAVID

ClickChange

--------ClickChange_logic.rb
--------Components
----------------01-DOOR.skp
----------------02-WINDOWS.skp
----------------03-GRIPS.skp
----------------04-TAPS.skp
----------------05-ELECTRICAL HOBS.skp
----------------06-GAS HOBS.skp
----------------07-EXTRACTOR.skp
----------------08-WALL PANEL.skp
----------------09-FRUITS.skp
----------------10-FLOWERS.skp
--------Resources
----------------add_01.png
----------------add_02.png
----------------add_03.png
----------------add_04.png
----------------add_05.png
----------------add_06.png
----------------add_07.png
----------------add_08.png
----------------add_09.png
----------------add_10.png
----------------add_11.png

ClickChange.rb

driven

@tntdavid said:

ClickChange
> --------ClickChange_logic.rb
> ....etc

is this now the rbs that's failing?
if so you need another .rb

ClickChange
--------ClickChange_loader.rb
--------ClickChange_logic.rbs
....etc

the minimum ClickChange_loader.rb needs to do is require('ClickChange_logic'), but it may be a little more involved than that...

I never encrypt any files, so this is from remembering other threads...

john

Dan Rathbun

(1) You need to use author namespace and file/folder prefix.
[Assuming the Ruby namespace TNT has not been used by anyone else...]
ie (in "Plugins" folder): [pre:2sn8ckc3]TNT_ClickChange.rb
TNT_ClickChange/ClickChange_loader.rb
TNT_ClickChange/ClickChange_logic.rbs
TNT_ClickChange/Components
TNT_ClickChange/Resources[/pre:2sn8ckc3]

(2) Then the %(#400080)[Plugins/TNT_ClickChange.rb] file:

<span class="syntaxdefault"></span><span class="syntaxcomment"># encoding; UTF-8<br /></span><span class="syntaxkeyword">require(</span><span class="syntaxstring">"extensions"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">module TNT<br />  module ClickChange<br /><br />    VERSION </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> </span><span class="syntaxstring">"1.0.0"<br /><br /></span><span class="syntaxdefault">    </span><span class="syntaxkeyword">@@</span><span class="syntaxdefault">extension </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> SketchupExtension</span><span class="syntaxkeyword">;;new(<br /></span><span class="syntaxdefault">      </span><span class="syntaxstring">"ClickChange"</span><span class="syntaxkeyword">,<br /></span><span class="syntaxdefault">      </span><span class="syntaxstring">"TNT_ClickChange/ClickChange_loader.rb"<br /></span><span class="syntaxdefault">    </span><span class="syntaxkeyword">)<br /><br /></span><span class="syntaxdefault">    </span><span class="syntaxkeyword">@@</span><span class="syntaxdefault">extension</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">description </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> </span><span class="syntaxstring">"ClickChange is a great plugin for ..."<br /></span><span class="syntaxdefault">    </span><span class="syntaxkeyword">@@</span><span class="syntaxdefault">extension</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">version </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> VERSION<br />    </span><span class="syntaxkeyword">@@</span><span class="syntaxdefault">extension</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">creator </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> </span><span class="syntaxstring">"TNT David"<br /></span><span class="syntaxdefault">    </span><span class="syntaxkeyword">@@</span><span class="syntaxdefault">extension</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">copyright </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> </span><span class="syntaxstring">"©2014 by www.composant-dynamique.com"<br /><br /></span><span class="syntaxdefault">    def self</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">extension</span><span class="syntaxkeyword">()<br /></span><span class="syntaxdefault">      </span><span class="syntaxkeyword">@@</span><span class="syntaxdefault">extension<br />    end<br /><br />    Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">register_extension</span><span class="syntaxkeyword">(</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">@@</span><span class="syntaxdefault">extension</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> true </span><span class="syntaxkeyword">)<br /><br /></span><span class="syntaxdefault">  end<br />end<br /></span>

(3) Then the %(#400080)[TNT_ClickChange/ClickChange_loader.rb] file:

<span class="syntaxdefault"></span><span class="syntaxcomment"># encoding; UTF-8<br /></span><span class="syntaxdefault">module TNT<br />  module ClickChange<br /><br />    DIR_ABS </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> File</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">dirname</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">__File__</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">    DIR_REL </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> DIR_ABS</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">split</span><span class="syntaxkeyword">(</span><span class="syntaxstring">'/'</span><span class="syntaxkeyword">).</span><span class="syntaxdefault">last<br /><br />    Sketchup</span><span class="syntaxkeyword">;;require(</span><span class="syntaxstring">"ClickChange_logic.rbs"</span><span class="syntaxkeyword">)<br /><br /></span><span class="syntaxdefault">  end<br />end<br /></span>

(4) Your %(#400080)[TNT_ClickChange/ClickChange_logic.rbs] file needs to be defined inside the nested TNT::ClickChange namespace, and use the local constants DIR_ABS and DIR_REL.

Dan Rathbun

OK, my latest updates to the RubyZip methods:

Note that if these are within a RBS scrambled file, and used in SketchUp version < 2014, then the generating of a path from inside use_piggyback_lib() will not work. A absolute path must be generated outside the RBS in an unscrambled script, and assigned to a constant, as in the above example.
Also, any statements using the Encoding class, are for Ruby 2.0+ versions of SketchUp.

FYI, My plugin will not support those old versions, by choice. So I generate the path internally.
And RubyZip also has dependencies from the Standard Ruby Lib, so I'm not so sure it'd work on most user's systems, unless they install my standard Lib extension.
Lastly, I myself use an internal boolean @@debug module variable, instead of $VERBOSE to decide whether to print exception backtraces.

<span class="syntaxdefault"></span><span class="syntaxcomment"># encoding; UTF-8<br /><br /></span><span class="syntaxdefault">      PLUGIN_NAME </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> </span><span class="syntaxstring">"TNT_ClickChange"</span><span class="syntaxdefault"> </span><span class="syntaxcomment"># or some other plugin name<br /><br /></span><span class="syntaxdefault">      </span><span class="syntaxkeyword">@@</span><span class="syntaxdefault">piggyback_lib </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> false<br /><br />      </span><span class="syntaxcomment">#{# RUBYZIP METHODS<br /></span><span class="syntaxdefault">      </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">        def is_RubyZip_loaded</span><span class="syntaxkeyword">?()<br /></span><span class="syntaxdefault">        </span><span class="syntaxcomment"># The first time be sure RubyZip library is loaded<br /></span><span class="syntaxdefault">          if defined</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Zip</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">            load_zip_version</span><span class="syntaxkeyword">()</span><span class="syntaxdefault"> unless defined</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Zip</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">VERSION</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">            return true<br />          end<br />          </span><span class="syntaxcomment"># Load or install the rubyzip gem library;<br /></span><span class="syntaxdefault">          begin<br />            require</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"zip"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">            </span><span class="syntaxcomment"># If already loaded returns false.<br /></span><span class="syntaxdefault">            </span><span class="syntaxcomment"># If the gem is installed, it will be activated, "zip.rb" run, and true is returned.<br /></span><span class="syntaxdefault">            </span><span class="syntaxcomment"># The danger here is that anyone could publish a gem named "Zip", with a "zip.rb"<br /></span><span class="syntaxdefault">            </span><span class="syntaxcomment">#   loader, and that such gem could get installed and activated, instead of RubyZip.<br /></span><span class="syntaxdefault">            </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">          rescue LoadError </span><span class="syntaxkeyword">=></span><span class="syntaxdefault"> e<br />          </span><span class="syntaxcomment"># Gem;;LoadError is a LoadError subclass<br /></span><span class="syntaxdefault">            if e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">message </span><span class="syntaxkeyword">=~</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">/(</span><span class="syntaxdefault">cannot load such file </span><span class="syntaxkeyword">\-\-</span><span class="syntaxdefault"> zip</span><span class="syntaxkeyword">)/<br /></span><span class="syntaxdefault">            </span><span class="syntaxcomment"># The gem is not installed OR RubyGems did not load<br /></span><span class="syntaxdefault">              if defined</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Gem</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">                </span><span class="syntaxcomment"># RubyGems is loaded, the gem needs installing.<br /></span><span class="syntaxdefault">                begin<br />                  Gem</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">install</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"rubyzip"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">                rescue Gem</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">InstallError</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> Gem</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">LoadError </span><span class="syntaxkeyword">=></span><span class="syntaxdefault"> e<br />                  puts</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"#{PLUGIN_NAME} Error; #<#{e.class.name}; #{e.message}>"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">                  puts</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">backtrace</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> if $VERBOSE<br />                  use_piggyback_lib</span><span class="syntaxkeyword">()<br /></span><span class="syntaxdefault">                end<br />              else </span><span class="syntaxcomment"># RubyGems did not load, perhaps unicode install path bug, etc.<br /></span><span class="syntaxdefault">                puts</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"#{PLUGIN_NAME} Error; RubyGems is not loaded."</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">                use_piggyback_lib</span><span class="syntaxkeyword">()<br /></span><span class="syntaxdefault">              end<br />            else </span><span class="syntaxcomment"># some other loadError<br /></span><span class="syntaxdefault">              puts</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"#{PLUGIN_NAME} Error; #<LoadError; #{e.message}>"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">              use_piggyback_lib</span><span class="syntaxkeyword">()<br /></span><span class="syntaxdefault">            end<br />          rescue </span><span class="syntaxkeyword">=></span><span class="syntaxdefault"> e </span><span class="syntaxcomment"># StandardError & it's subclasses;<br /></span><span class="syntaxdefault">            puts</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"#{PLUGIN_NAME} Error; #<#{e.class.name}; #{e.message}>"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">            puts</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">backtrace</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> if $VERBOSE<br />            use_piggyback_lib</span><span class="syntaxkeyword">()<br /></span><span class="syntaxdefault">          else<br />            load_zip_version</span><span class="syntaxkeyword">()</span><span class="syntaxdefault"> unless defined</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Zip</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">VERSION</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">          ensure<br />            unless defined</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Zip</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">              </span><span class="syntaxcomment"># Ensure the load of the Zip library;<br /></span><span class="syntaxdefault">              </span><span class="syntaxcomment">#   after new gem install or using piggyback library.<br /></span><span class="syntaxdefault">              begin<br />                require</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"zip"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">              rescue StandardError</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> LoadError </span><span class="syntaxkeyword">=></span><span class="syntaxdefault"> e<br />                puts</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"#{PLUGIN_NAME} Error; #<#{e.class.name}; #{e.message}>"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">                puts</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"  (Tried to load piggyback RubyZip library.)"</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> if piggyback_lib</span><span class="syntaxkeyword">?<br /></span><span class="syntaxdefault">                puts</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">backtrace</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> if $VERBOSE<br />              else<br />                load_zip_version</span><span class="syntaxkeyword">()</span><span class="syntaxdefault"> unless defined</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Zip</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">VERSION</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">              end<br />              </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">            end<br />          end </span><span class="syntaxcomment"># outer require("zip")<br /></span><span class="syntaxdefault">          </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">          defined</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Zip</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">?</span><span class="syntaxdefault"> true </span><span class="syntaxkeyword">;</span><span class="syntaxdefault"> false<br />          </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">        end </span><span class="syntaxcomment"># is_RubyZip_loaded?()<br /><br /></span><span class="syntaxdefault">        def is_Zip_FileSystem_loaded</span><span class="syntaxkeyword">?()<br /></span><span class="syntaxdefault">          </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">          unless defined</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Zip</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">            is_RubyZip_loaded</span><span class="syntaxkeyword">?()<br /></span><span class="syntaxdefault">            return false unless defined</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Zip</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">          end<br />          </span><span class="syntaxcomment"># load the FileSystem extension to class Zip;;File<br /></span><span class="syntaxdefault">          begin<br />            require</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"zip/filesystem"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">          rescue </span><span class="syntaxkeyword">=></span><span class="syntaxdefault"> e<br />            puts</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"#{PLUGIN_NAME} Error; #<#{e.class.name}; #{e.message}.>"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">            return false<br />          else<br />            return true<br />          end<br />          </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">        end </span><span class="syntaxcomment"># is_Zip_FileSystem_loaded?()<br /><br /></span><span class="syntaxdefault">        def load_zip_version</span><span class="syntaxkeyword">()<br /></span><span class="syntaxdefault">          </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">          return true if defined</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Zip</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">VERSION</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">          </span><span class="syntaxcomment"># otherwise, load the VERSION constant of module Zip;<br /></span><span class="syntaxdefault">          begin<br />            require</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"zip/version"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">          rescue StandardError</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> ScriptError</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> LoadError </span><span class="syntaxkeyword">=></span><span class="syntaxdefault"> e<br />            puts</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"#{PLUGIN_NAME} Error; #<#{e.class.name}; #{e.message}.>"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">            return false<br />          else<br />            return true<br />          end<br />          </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">        end </span><span class="syntaxcomment"># load_zip_version()<br /><br /></span><span class="syntaxdefault">        def piggyback_lib</span><span class="syntaxkeyword">?()<br /></span><span class="syntaxdefault">          </span><span class="syntaxkeyword">@@</span><span class="syntaxdefault">piggyback_lib<br />        end<br /><br />        def use_piggyback_lib</span><span class="syntaxkeyword">()<br /></span><span class="syntaxdefault">        </span><span class="syntaxcomment"># Push the piggyback RubyZip library directory into $LOAD_PATH;<br /></span><span class="syntaxdefault">          </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">          unless defined</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Zip</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">||<br /></span><span class="syntaxdefault">          </span><span class="syntaxkeyword">$;.</span><span class="syntaxdefault">any</span><span class="syntaxkeyword">?{|</span><span class="syntaxdefault">path</span><span class="syntaxkeyword">|</span><span class="syntaxdefault"> File</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">exist</span><span class="syntaxkeyword">?(</span><span class="syntaxstring">"#{path}/zip.rb"</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">}<br /></span><span class="syntaxdefault">            </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">            </span><span class="syntaxcomment"># Only happens if the rubyzip gem cannot be installed or loaded.<br /></span><span class="syntaxdefault">            thisfilepath </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> caller</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">0</span><span class="syntaxkeyword">).</span><span class="syntaxdefault">first</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">split</span><span class="syntaxkeyword">(/(\;\</span><span class="syntaxdefault">d</span><span class="syntaxkeyword">+\;</span><span class="syntaxdefault">in</span><span class="syntaxkeyword">|\;\</span><span class="syntaxdefault">d</span><span class="syntaxkeyword">+\</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">|\;</span><span class="syntaxdefault">in </span><span class="syntaxkeyword">`</span><span class="syntaxstring">)/).first #</span><span class="syntaxkeyword">`<br /></span><span class="syntaxdefault">            thisfilepath</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">force_encoding</span><span class="syntaxkeyword">(</span><span class="syntaxstring">'UTF-8'</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> unless thisfilepath</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">encoding </span><span class="syntaxkeyword">!=</span><span class="syntaxdefault"> Encoding</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">UTF_8<br />            $LOAD_PATH </span><span class="syntaxkeyword"><<</span><span class="syntaxdefault"> </span><span class="syntaxstring">"#{thisfilepath}/rubyzip/lib"<br /></span><span class="syntaxdefault">            puts</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"#{PLUGIN_NAME}; (Using \"fallback\" plugin distribution of rubyzip.)"</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">            </span><span class="syntaxkeyword">@@</span><span class="syntaxdefault">piggyback_lib </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> true<br />            </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">          end<br />          </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">        end </span><span class="syntaxcomment"># use_piggyback_lib()<br /><br /></span><span class="syntaxdefault">        def zip_version</span><span class="syntaxkeyword">()<br /></span><span class="syntaxdefault">          </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">          if defined</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Zip</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">VERSION</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">            Zip</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">VERSION<br />          else </span><span class="syntaxcomment"># load the VERSION constant of module Zip<br /></span><span class="syntaxdefault">            load_zip_version</span><span class="syntaxkeyword">()</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">?</span><span class="syntaxdefault"> Zip</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">VERSION </span><span class="syntaxkeyword">;</span><span class="syntaxdefault"> false<br />          end<br />          </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">        end </span><span class="syntaxcomment"># zip_version()<br /><br /></span><span class="syntaxdefault">      </span><span class="syntaxcomment">#<br /></span><span class="syntaxdefault">      </span><span class="syntaxcomment">#}#<br />&nbsp;</span><span class="syntaxdefault"></span>

Dan Rathbun

@inteloide said:

May I have your help on :

the installation of gem rubyzip, to make it easier for user

This is what I am doing in one of my plugins. (Of course, my PLUGIN_NAME constant has a different string name.)

I have a "fallback" version of rubyzip, with a "rubyzip" sub-directory of the plugin sub-directory.
It only gets used if the latest version cannot be installed from rubygems.org.
The "fallback" rubyzip's path is pushed into the $LOAD_PATH array by the method use_piggyback_lib().

EDIT3: New version of code example: Same topic: Later post, on page 2

EDIT: Made a few small code edits.

Extension rbz maker

When RubyGems is required, `Kernel#require` is replaced with our own which

is capable of loading gems on demand.

When you call `require 'x'`, this is what happens:

* If the file can be loaded from the existing Ruby loadpath, it is.

* Otherwise, installed gems are searched for a file that matches.

If it's found in gem 'y', that gem is activated (added to the

loadpath).

The normal `require` functionality of returning `false` if

that file has already been loaded is preserved.

Extension rbz maker

When RubyGems is required, Kernel#require is replaced with our own which

is capable of loading gems on demand.

When you call require 'x', this is what happens:

* If the file can be loaded from the existing Ruby loadpath, it is.

* Otherwise, installed gems are searched for a file that matches.

If it's found in gem 'y', that gem is activated (added to the

loadpath).

The normal require functionality of returning false if

that file has already been loaded is preserved.

When RubyGems is required, `Kernel#require` is replaced with our own which

When you call `require 'x'`, this is what happens:

The normal `require` functionality of returning `false` if