Hi Romain,
not that I have any authority here, but wouldn't your suggestion (which
I think could be very useful) be more powerful if it were accompanied by
a patch that could be applied to the R sources?
Best wishes
Wolfgang Huber
EMBL
http://www.embl.de/research/units/genome_biology/huber
On 28/05/10 19:25, Romain Francois wrote:
Hello,
I often find myself writing code like :
if( require( "foo" ) && compareVersion( packageDescription(
"foo")[["Version"]], "2.1" ) < 0 ){
# code that uses version 2.1 of foo
} else {
stop( "could not load version >= 2.1 of foo" )
}
Would it make sense to include something like this in require, library,
etc ...
require( "foo (>= 2.1)" )
require( "foo", minimal.version = "2.1" )
I know we can use Depends: foo (>= 2.1) in a package DESCRIPTION file,
but that does not work for loose dependencies, when package "bar" works
better with "foo" but can still work fine without, or when not making a
package.
Romain
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