On Jun 27, 2016 12:58 PM, "Tom Breloff" <[email protected]> wrote: > > Yichao: is there an alternative "is_installed" definition that would check the load path? Lets assume I don't actually want to import it, just check.
No. > > On Mon, Jun 27, 2016 at 12:48 PM, Yichao Yu <[email protected]> wrote: >> >> >> On Jun 27, 2016 12:20 PM, "Tom Breloff" <[email protected]> wrote: >> > >> > Here is what I use for this sort of logic: >> > >> > function is_installed(pkgstr::AbstractString) >> > try >> > Pkg.installed(pkgstr) === nothing ? false: true >> >> Dont do this since this will miss package in load path. Just eval a using expression. >> >> > catch >> > false >> > end >> > end >> > >> > >> > On Mon, Jun 27, 2016 at 12:12 PM, David Anthoff <[email protected]> wrote: >> >> >> >> I’m trying to use ``using`` in a try catch block, but that doesn’t seem to be supported. >> >> >> >> >> >> >> >> Any other way around this? Essentially I want to load a package, and if the package is not installed, automatically do a ``Pkg.add``. >> >> >> >> >> >> >> >> I could of course get a list of all the installed packages and see if the one I need is there, but given the slowness of the package manager, I would prefer to just try to load it first, and only if that fails attempt to ``Pkg.add``. >> >> >> >> >> >> >> >> Thanks, >> >> >> >> David >> >> >> >> >> >> >> >> -- >> >> >> >> David Anthoff >> >> >> >> University of California, Berkeley >> >> >> >> >> >> >> >> http://www.david-anthoff.com >> >> >> >> >> > >> > > >
