Thanks, Jeffrey. I'll give that a shot.
On Tuesday, December 8, 2015 at 8:43:00 AM UTC-8, Jeffrey Sarnoff wrote: > > If I understand your question, you need to determine whether or not a > package (call it "Package") is available to be used via *using* or > *import.* > You can know if a package is present before trying to load the package. > > This will evaluate true when the package "Package" is present, and false > when the package is not present, before trying to load it: > `` > isdir(joinpath(Pkg.dir(),"Package") > ``` > On Tuesday, December 8, 2015 at 11:02:17 AM UTC-5, Jeffrey Sarnoff wrote: >> >> if isdir(joinpath(Pkg.dir(),"Package")) >> ... >> else >> ... >> end >> >> >> On Monday, December 7, 2015 at 10:50:56 AM UTC-5, Seth wrote: >>> >>> Is there a way to specify a conditional dependency (that is, use package >>> Foo if it's available and define functions that use things from Foo; >>> otherwise, don't define the functions or throw an error message) on >>> packages that contain macros? isdefined(Main, :Package) won't work since >>> the macros from Package are evaluated prior to this conditional, and it >>> will throw an error. >>> >>> I was using Requires.jl to do this, but one issue I ran into is that an >>> error in the code within the @require block is not propagated as an error; >>> it's presented as a warning, which means that things like unit tests will >>> pass even if the code is incorrect. >>> >>
