In REPL mode, Julia lets you type a semicolon and run shell commands, i.e.
;
cd ~
And then to return to Julian REPL
Is there a way to do something similar in a .jl file? The closest I found was run(…) and that has many caveats. This is a Linux environment, so I'm not concerned about the caveats of shell mode on Windows machines.
The broader topic of interest is in doing this for other REPL modes, like the R one provided by using RCall
As you mentioned, the default way to do is via the run command. If you have not already, check out the docs on this https://docs.julialang.org/en/v1/manual/running-external-programs/#Running-External-Programs which go into some of the caveats.
I am not sure I follow what you are getting at with RCall but it may perhaps be worth opening a separate question for that.
You can find the code for this at https://github.com/JuliaLang/julia/tree/master/stdlib/REPL/test.
Seems there is no API, just lots of typing.
Here is a minimal working example (the codes are mostly copied from different places from the folder above):
using REPL
mutable struct FakeTerminal <: REPL.Terminals.UnixTerminal
in_stream::Base.IO
out_stream::Base.IO
err_stream::Base.IO
hascolor::Bool
raw::Bool
FakeTerminal(stdin,stdout,stderr,hascolor=true) =
new(stdin,stdout,stderr,hascolor,false)
end
REPL.Terminals.hascolor(t::FakeTerminal) = t.hascolor
REPL.Terminals.raw!(t::FakeTerminal, raw::Bool) = t.raw = raw
REPL.Terminals.size(t::FakeTerminal) = (24, 80)
input = Pipe()
output = Pipe()
err = Pipe()
Base.link_pipe!(input, reader_supports_async=true, writer_supports_async=true)
Base.link_pipe!(output, reader_supports_async=true, writer_supports_async=true)
Base.link_pipe!(err, reader_supports_async=true, writer_supports_async=true)
repl = REPL.LineEditREPL(FakeTerminal(input.out, output.in, err.in, false), false)
repltask = @async REPL.run_repl(repl)
Now you can do:
julia> println(input,";ls -la *.jld2")
-rw-r--r-- 1 pszufe 197121 5506 Jul 5 2020 file.jld2
-rw-r--r-- 1 pszufe 197121 5506 Jul 5 2020 myfile.jld2