[BioC] rationale behind getBioC script

[Adaikalavan Ramasamy]

What is the rationale behind using the getBioC script ? For example if I
want to install all R packages, I would do the following :

   all  <- CRAN.packages()[ ,1]
   got  <- installed.packages()[ ,1]
   need <- setdiff(all, got)
   install.packages( need )

and then go for a really long coffee break. 

Is would be useful to have something similar to CRAN.packages, perhaps
named BioC.packages() . 

Is it sensible to have BioC.packages() and install.packages2()
(currently in reposTools) directly in the R base package itself ?

Thank you.

Regards, Adai