[wishlist] pkg require

[Francesco Potorti`]

Since, at least in 3.0, 'pg load' is so slow, even if the package is
already loaded, would it make sense to allow for loading a package if
not already loaded?

Solution 1: 'pkg load' should only load a package if not already loaded,
unless an option -force is given that reloads the package.

Solution 2: 'pkg load' accept a -require option which loads the package
only if not already loaded.

Solution 3: 'pkg require' loads a package only if not already loaded.

-- 
Francesco Potortì (ricercatore)        Voice: +39 050 315 3058 (op.2111)
ISTI - Area della ricerca CNR          Fax:   +39 050 315 2040
via G. Moruzzi 1, I-56124 Pisa         Email: Potorti at isti.cnr.it
(entrance 20, 1st floor, room C71)     Web:   http://fly.isti.cnr.it/