mathlink macos wolfram engine

[fgerick]

This took me a while to find when using the free Wolfram Engine. With Mathematica this is automatically linked, so no problem.

[simonbyrne]

This should work already. I don't have Wolfram Engine installed, but can you check the logic used here:

MathLink.jl/deps/build.jl

Lines 19 to 28 in ab8ed47

	# Wolfram Engine
	for path in readlines(`mdfind "kMDItemCFBundleIdentifier == 'com.wolfram.engine'"`)
	# kernels are located in sub-application
	subpath = joinpath(path, "Contents/Resources/Wolfram Player.app")
	lib = joinpath(subpath,"Contents/Frameworks/mathlink.framework/mathlink")
	ker = joinpath(subpath,"Contents/MacOS/MathKernel")
	if isfile(lib) && isfile(ker)
	return lib, ker
	end
	end

[fgerick]

without setting any environment variables I get this :

(@v1.6) pkg> build MathLink
    Building MathLink → `~/.julia/scratchspaces/44cfe95a-1eb2-52ea-b672-e2afdf69b78f/456465e96317c706dc2e782f441bff3053ff843e/build.log`
ERROR: Error building `MathLink`:
ERROR: LoadError: Could not find Mathematica or Wolfram Engine installation.
Please set the `JULIA_MATHLINK` and `JULIA_MATHKERNEL` variables.
Stacktrace:
 [1] error(s::String)
   @ Base ./error.jl:33
 [2] find_lib_ker()
   @ Main ~/.julia/packages/MathLink/f5mIR/deps/build.jl:85
 [3] top-level scope
   @ ~/.julia/packages/MathLink/f5mIR/deps/build.jl:88
 [4] include(fname::String)
   @ Base.MainInclude ./client.jl:444
 [5] top-level scope
   @ none:5
in expression starting at /Users/felixger/.julia/packages/MathLink/f5mIR/deps/build.jl:88

because

julia> readlines(`mdfind "kMDItemCFBundleIdentifier == 'com.wolfram.engine'"`)
String[]

did I miss something during the installation of the Wolfram Engine? which wolframscript gives /usr/local/bin/wolframscript, which is a softlink /usr/local/bin/wolframscript -> /Applications/WolframScript.app/Contents/MacOS/wolframscript

[simonbyrne]

what does this give?

readlines(`mdfind "kMDItemCFBundleIdentifier == 'com.wolfram.*'"`)

[fgerick]

julia> readlines(`mdfind "kMDItemCFBundleIdentifier == 'com.wolfram.*'"`)
3-element Vector{String}:
 "/Applications/Wolfram Player.app"
 "/Applications/Wolfram Engine.app"
 "/Applications/WolframScript.app"

[simonbyrne]

Thanks!