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Sys.detectwsl() #36425

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16 changes: 14 additions & 2 deletions base/sysinfo.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,8 @@ export BINDIR,
iswindows,
isjsvm,
isexecutable,
which
which,
detectwsl

import ..Base: show

Expand Down Expand Up @@ -411,7 +412,18 @@ including e.g. a WebAssembly JavaScript embedding in a web browser.
"""
isjsvm(os::Symbol) = (os === :Emscripten)

for f in (:isunix, :islinux, :isbsd, :isapple, :iswindows, :isfreebsd, :isopenbsd, :isnetbsd, :isdragonfly, :isjsvm)
"""
Sys.detectwsl([os])

Runtime Predicate for testing if Julia is running inside WSL.
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How about this? (The 1.11 would have to be changed if this were to be backported to 1.10)

Suggested change
Runtime Predicate for testing if Julia is running inside WSL.
Runtime predicate for testing if Julia is running inside
Windows Subsystem for Linux (WSL).
!!! note
Unlike `Sys.iswindows`, `Sys.islinux` etc., this is a runtime tests, and thus
cannot meaningfully be used in `@static if ` constructs.
!!! compat "Julia 1.11"
This function requires at least Julia 1.11.

"""
function detectwsl(os::Symbol)
islinux(os) &&
isfile("/proc/sys/kernel/osrelease") &&
contains(read("/proc/sys/kernel/osrelease", String), r"Microsoft|WSL"i)
end

for f in (:detectwsl, :isunix, :islinux, :isbsd, :isapple, :iswindows, :isfreebsd, :isopenbsd, :isnetbsd, :isdragonfly, :isjsvm)
@eval $f() = $(getfield(@__MODULE__, f)(KERNEL))
end

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5 changes: 5 additions & 0 deletions test/osutils.jl
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Expand Up @@ -28,6 +28,11 @@
else
@test Sys.windows_version() >= v"1.0.0-"
end

@test !Sys.detectwsl(:Windows)
if !Sys.islinux()
@test !Sys.detectwsl()
end
end

@testset "@static" begin
Expand Down