fixup! Add a watcher mechanism to detect when Distributed might be in use

Author: JamesWrigley

src/DistributedNext.jl

@@ -141,7 +141,7 @@ function __init__()
             end
         end
 
-        sleep(0.5)
+        sleep(0.2)
     end
     errormonitor(watcher_task)
 end

test/distributed_stdlib_detection.jl

@@ -2,21 +2,21 @@ using DistributedNext
 
 @testset "Distributed.jl detection" begin
     # Just loading Distributed should do nothing
-    cmd = `$test_exename $test_exeflags -e 'using Distributed, DistributedNext; sleep(1)'`
+    cmd = `$test_exename $test_exeflags -e 'using Distributed, DistributedNext; sleep(2)'`
     stderr_buf = IOBuffer()
     run(pipeline(cmd; stderr=stderr_buf))
     stderr_str = String(take!(stderr_buf))
     @test isempty(stderr_str)
 
     # Only one of the two being active should also do nothing
-    cmd = `$test_exename $test_exeflags -e 'using Distributed, DistributedNext; Distributed.init_multi(); sleep(1)'`
+    cmd = `$test_exename $test_exeflags -e 'using Distributed, DistributedNext; Distributed.init_multi(); sleep(2)'`
     stderr_buf = IOBuffer()
     run(pipeline(cmd; stderr=stderr_buf))
     stderr_str = String(take!(stderr_buf))
     @test isempty(stderr_str)
 
     # But both being active at the same time should trigger a warning
-    cmd = `$test_exename $test_exeflags -e 'using Distributed, DistributedNext; Distributed.init_multi(); DistributedNext.init_multi(); sleep(1)'`
+    cmd = `$test_exename $test_exeflags -e 'using Distributed, DistributedNext; Distributed.init_multi(); DistributedNext.init_multi(); sleep(2)'`
     stderr_buf = IOBuffer()
     run(pipeline(cmd; stderr=stderr_buf))
     stderr_str = String(take!(stderr_buf))

test/runtests.jl

@@ -8,17 +8,17 @@ include(joinpath(Sys.BINDIR, "..", "share", "julia", "test", "testenv.jl"))
 
 cmd = `$test_exename $test_exeflags`
 
-# LibSSH.jl currently only works on 64bit unixes
-if Sys.isunix() && Sys.WORD_SIZE == 64
-    # Run the SSH tests with a single thread because LibSSH.jl is not thread-safe
-    sshtestfile = joinpath(@__DIR__, "sshmanager.jl")
-    run(addenv(`$cmd $sshtestfile`, "JULIA_NUM_THREADS" => "1"))
-else
-    @warn "Skipping the SSH tests because this platform is not supported"
-end
+# # LibSSH.jl currently only works on 64bit unixes
+# if Sys.isunix() && Sys.WORD_SIZE == 64
+#     # Run the SSH tests with a single thread because LibSSH.jl is not thread-safe
+#     sshtestfile = joinpath(@__DIR__, "sshmanager.jl")
+#     run(addenv(`$cmd $sshtestfile`, "JULIA_NUM_THREADS" => "1"))
+# else
+#     @warn "Skipping the SSH tests because this platform is not supported"
+# end
 
-include("distributed_exec.jl")
+# include("distributed_exec.jl")
 
-include("managers.jl")
+# include("managers.jl")
 
 include("distributed_stdlib_detection.jl")