Add commandline_hello examples

Author: NHDaly

examples/commandline_hello.jl

@@ -0,0 +1,8 @@
+# A super-simple command line program that just prints hello.
+# Build this with the `commandline_app=true` flag in `BuildApp.build_app_bundle`.
+
+Base.@ccallable function julia_main(ARGS::Vector{String})::Cint
+    println("Oh hi, World!")
+    println("Current working directory: $(pwd())")
+    return 0
+end

test/BuildApp.jl

@@ -21,6 +21,11 @@ builddir = mktempdir()
 end
 end
 
+@testset "commandline_app" begin
+@test 0 == include("build_examples/commandline_hello.jl")
+@test success(`open $builddir/hello.app`)
+end
+
 
 function testRunAndKillProgramSucceeds(cmd)
     out, _, p = readandwrite(cmd) # Make sure it runs correctly

test/build_examples/commandline_hello.jl

@@ -0,0 +1,9 @@
+using ApplicationBuilder; using BuildApp
+
+# Allow this file to be called either as a standalone file to build the above
+# example, or from runtests.jl using a provided builddir.
+isdefined(:builddir) || (builddir=nothing)  # nothing == default builddir.
+
+build_app_bundle(joinpath(@__DIR__,"..","..","examples","commandline_hello.jl"),
+                 appname="hello",
+                 commandline_app=true, builddir=builddir)