Hi Alain,

I would like to use ruby 1.9 under Snow 10.6

1. How to install Ruby 1.9 :

Side by side with 1.8.7 or remove 1.8.7 ? What is the best solution ?

I'm sorry but I don't know anything about Ruby 1.9. I haven't installed it, and I'm not sure if it is compatible with Executor (the ruby lib that powers LaTeXtra).

I will continue to compile LaTeX with TextMate

2. I'm interesting by the code of the command "Typset & View in Skim"

of the bundle LaTeXtra and also by the command "Preview Tikz Picture"

I would like to know the important points in these codes, perhaps if it's possible to read some comments about the code

The best place to look for documentation of Executor (which powers both of those commands) is here: http://svn.textmate.org/trunk/Support/lib/tm/executor.rb

So, I've deprecated the LaTeXtra bundle and am now in the process of merging that code into the LaTeX bundle. You can try the WIP bundle here: http://github.com/alexross/latex.tmbundle. This should be installed _along side_ the regular latex bundle and will show up as LaTeX2 in the bundle editor. There are some sort of experimental macros/snippets in there that you may not like, just delete them if that is the case. I have very short description at the above link, but feel free to ask anything.

I also have gotten rid of the “Preview TikZ picture” command because I have stumbled on a better method. What you should do is keep your tikz pictures in their own files. The bundle includes a “default format” which will be used when you compile a document that does not have a preamble. You may also specify a custom format if you have specially defined macros (or tikz styles) and point to it with TM_LATEX_DEFAULT_FORMAT. I've been meaning to do a screencast showing off all these features/workflows but of course I'm always busy :/

—Alex