Tests whether Julia is installed and the Circuitscape Julia package can be
loaded. This is a lightweight check that does not initialize a full Julia
session. It is used internally by example code and can be called by users
to verify their setup before running analyses.
Value
TRUE if Julia is found on the system PATH and the
'Circuitscape' Julia package loads successfully, FALSE otherwise.
Examples
cs_julia_available()
#> Warning: running command ''julia' --startup-file=no -e "using Circuitscape; println(true)" 2>/dev/null' had status 1
#> [1] FALSE
