feat: Process.run out: err: option can be an Array

Author: initdc

lib/rb/process.rb

@@ -43,8 +43,8 @@ def self.run(*args, out: $stdout, err: $stderr, exception: false, **options)
 
     out_strio = StringIO.new
     err_strio = StringIO.new
-    out_multiwriter = IO::MultiWriter.new(out, out_strio)
-    err_multiwriter = IO::MultiWriter.new(err, err_strio)
+    out_multiwriter = out.is_a?(Array) ? IO::MultiWriter.new(*out, out_strio) : IO::MultiWriter.new(out, out_strio)
+    err_multiwriter = err.is_a?(Array) ? IO::MultiWriter.new(*err, err_strio) : IO::MultiWriter.new(err, err_strio)
 
     if block_given?
       stdin_reader, stdin_writer = IO.pipe

spec/rb/process_spec.rb

@@ -77,6 +77,22 @@
     tempfile.delete
   end
 
+  it "write to multi IO" do
+    tempfile1 = Tempfile.new(["test_", ".log"])
+    tempfile2 = Tempfile.new(["test_", ".log"])
+
+    File.open(tempfile1.path, "w") do |io1|
+      File.open(tempfile2.path, "w") do |io2|
+        expect(Process.run("uname", out: [io1, io2]).each_line.to_a).to eq ["Linux\n"]
+      end
+    end
+
+    expect(tempfile1.readlines).to eq ["Linux\n"]
+    expect(tempfile2.readlines).to eq ["Linux\n"]
+    tempfile1.delete
+    tempfile2.delete
+  end
+
   # https://devdocs.io/ruby~3.4/io#class-IO-label-Reading
   it "responds to methods" do
     Process.run("bash", out: File.open(File::NULL, "r+")) do |pipe|