[R-pkg-devel] Loading Libraries Outside of .lib.loc

Uwe Ligges ligges at statistik.tu-dortmund.de
Wed Jun 28 23:36:50 CEST 2017

Just set
and then
shoudl do the trick.
Uwe Ligges

On 28.06.2017 22:23, Bill Denney wrote:
> Hi,
> I'm working on a script to test my library (PKNCA) for what the minimum 
> required version of its dependencies are.  Specifically, I've received 
> bug reports when people are using versions of dplyr < 0.5.0.
> To test my package against old versions of libraries, I'm installing old 
> versions of packages in separate directories with:
>> dir.create("/tmp/current", recursive=TRUE)
>> install.packages("devtools", lib="/tmp/current")
> I then try to load the devtools library that I've just installed, and I 
> get an error:
>> library(devtools, lib.loc="/tmp/current")
> Error: package or namespace load failed for ‘devtools’:
>   .onLoad failed in loadNamespace() for 'devtools', details:
>    call: loadNamespace(name)
>    error: there is no package called ‘withr’
> I would have assumed that lib.loc would cause R to search within the 
> directory I just created for the dependencies, too.  But it doesn't 
> appear to do so:
>> library(withr, lib.loc="/tmp/current")
> (no error)
> Is this intended behavior or a bug?  If intended behavior, I can 
> manipulate .lib.loc through something like:
> assign(".lib.loc", envir=environment(.libPaths),
>         c("/tmp/current", "/usr/local/lib/R/site-library",
>           "/usr/lib/R/site-library", "/usr/lib/R/library"))
> Thanks,
> Bill
> P.S. Apologies if this would better fit on a more general mailing list, 
> but the only reason I'm bashing at library and install.packages is 
> related to package development and testing.
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