Add Sys.is<os>

README.md

@@ -154,6 +154,10 @@ Currently, the `@compat` macro supports the following syntaxes:
 
 * `takebuf_array` is now a method of `take!`. `takebuf_string(io)` becomes `String(take!(io))` ([#19088])
 
+* `is_apple`, `is_bsd`, `is_linux`, `is_unix`, and `is_windows` are now `Sys.isapple`, `Sys.isbsd`,
+  `Sys.islinux`, `Sys.isunix`, and `Sys.iswindows`, respectively. These are available in the `Compat.Sys`
+  submodule. ([#22182])
+
 ## New macros
 
 * `@__DIR__` has been added ([#18380])
@@ -285,4 +289,5 @@ includes this fix. Find the minimum version from there.
 [#21257]: https://github.com/JuliaLang/julia/issues/21257
 [#21346]: https://github.com/JuliaLang/julia/issues/21346
 [#22064]: https://github.com/JuliaLang/julia/issues/22064
+[#22182]: https://github.com/JuliaLang/julia/issues/22182
 [#22475]: https://github.com/JuliaLang/julia/issues/22475

src/Compat.jl

@@ -618,4 +618,17 @@ include("deprecated.jl")
 # https://github.com/JuliaLang/julia/pull/21746
 const macros_have_sourceloc = VERSION >= v"0.7-" && length(:(@test).args) == 2
 
+# https://github.com/JuliaLang/julia/pull/22182
+module Sys
+    if VERSION < v"0.7.0-DEV.914"
+        isapple(k::Symbol=Base.Sys.KERNEL)   = k in (:Darwin, :Apple)
+        isbsd(k::Symbol=Base.Sys.KERNEL)     = isapple(k) || k in (:FreeBSD, :OpenBSD, :NetBSD, :DragonFly)
+        islinux(k::Symbol=Base.Sys.KERNEL)   = k == :Linux
+        isunix(k::Symbol=Base.Sys.KERNEL)    = isbsd(k) || islinux(k)
+        iswindows(k::Symbol=Base.Sys.KERNEL) = k in (:Windows, :NT)
+    else
+        import Base.Sys: isapple, isbsd, islinux, isunix, iswindows
+    end
+end
+
 end # module Compat

test/runtests.jl

@@ -138,11 +138,11 @@ let x = rand(rng, Int64, 3,4)
     @test x == rand(rng, Int64, (3,4))
 end
 
-extrapath = is_windows() ? joinpath(JULIA_HOME,"..","Git","usr","bin")*";" : ""
+extrapath = Compat.Sys.iswindows() ? joinpath(JULIA_HOME,"..","Git","usr","bin")*";" : ""
 @compat withenv("PATH" => extrapath * ENV["PATH"]) do
     cmd1 = pipeline(`echo hello`, `sort`)
     cmd2 = pipeline(`true`, `true`)
-    if is_windows()
+    if Compat.Sys.iswindows()
         try # use busybox-w32
             success(`busybox`)
             cmd1 = pipeline(`busybox echo hello`, `busybox sort`)
@@ -921,7 +921,7 @@ cd(dirwalk) do
         touch(joinpath("sub_dir1", "file$i"))
     end
     touch(joinpath("sub_dir2", "file_dir2"))
-    has_symlinks = is_unix() ? true : (isdefined(Base, :WINDOWS_VISTA_VER) && Base.windows_version() >= Base.WINDOWS_VISTA_VER)
+    has_symlinks = Compat.Sys.isunix() ? true : (isdefined(Base, :WINDOWS_VISTA_VER) && Base.windows_version() >= Base.WINDOWS_VISTA_VER)
     follow_symlink_vec = has_symlinks ? [true, false] : [false]
     has_symlinks && symlink(abspath("sub_dir2"), joinpath("sub_dir1", "link"))
     for follow_symlinks in follow_symlink_vec
@@ -1228,6 +1228,15 @@ end
 @test Compat.repeat(1:2, outer=[2]) == [1, 2, 1, 2]
 @test Compat.repeat([1,2], inner=(2,)) == [1, 1, 2, 2]
 
+for os in [:apple, :bsd, :linux, :unix, :windows]
+    from_base = if VERSION >= v"0.7.0-DEV.914"
+        Expr(:., Expr(:., :Base, Base.Meta.quot(:Sys)), Base.Meta.quot(Symbol("is", os)))
+    else # VERSION >= v"0.5.0-dev+4267"
+        Expr(:., :Base, Base.Meta.quot(Symbol("is_", os)))
+    end
+    @eval @test Compat.Sys.$(Symbol("is", os))() == $from_base()
+end
+
 io = IOBuffer()
 @test @compat(get(io, :limit, false)) == false
 @test @compat(get(io, :compact, false)) == false