Add printstyled (#481)

README.md

@@ -253,6 +253,8 @@ Currently, the `@compat` macro supports the following syntaxes:
 * `codeunits(s)` returns an array-like view of the `UInt8` code units of
   a string and `ncodeunits(s)` returns the number of code units ([#25241]).
 
+* `printstyled` prints to a given stream optionally in color and/or bolded ([#25522]).
+
 * `Dates.Period` rounding (e.g., `round(Dates.Hour(36), Dates.Day, RoundNearestTiesUp) == Dates.Day(2)` ([#24182]).
 
 
@@ -513,6 +515,7 @@ includes this fix. Find the minimum version from there.
 [#25458]: https://github.com/JuliaLang/julia/issues/25458
 [#25459]: https://github.com/JuliaLang/julia/issues/25459
 [#25496]: https://github.com/JuliaLang/julia/issues/25496
+[#25522]: https://github.com/JuliaLang/julia/issues/25522
 [#25544]: https://github.com/JuliaLang/julia/issues/25544
 [#25545]: https://github.com/JuliaLang/julia/issues/25545
 [#25571]: https://github.com/JuliaLang/julia/issues/25571

src/Compat.jl

@@ -1509,6 +1509,15 @@ end
     export lastindex
 end
 
+# 0.7.0-DEV.3585
+@static if !isdefined(Base, :printstyled)
+    printstyled(io::IO, msg...; bold=false, color=:normal) =
+        Base.print_with_color(color, io, msg...; bold=bold)
+    printstyled(msg...; bold=false, color=:normal) =
+        Base.print_with_color(color, STDOUT, msg...; bold=bold)
+    export printstyled
+end
+
 include("deprecated.jl")
 
 end # module Compat

test/runtests.jl

@@ -1305,4 +1305,17 @@ end
 @test lastindex(zeros(4)) == 4
 @test lastindex(zeros(4,4)) == 16
 
+# 0.7.0-DEV.3585
+let buf = IOBuffer()
+    if VERSION < v"0.7.0-DEV.3077"
+        col = Base.have_color
+        eval(Base, :(have_color = true))
+        printstyled(buf, "foo", color=:red)
+        eval(Base, :(have_color = $col))
+    else
+        printstyled(IOContext(buf, :color=>true), "foo", color=:red)
+    end
+    @test startswith(String(take!(buf)), Base.text_colors[:red])
+end
+
 nothing