feat: Process.output return Option type now

- Add exception option for Process.run
- Update rubocop config

Author: initdc

.rubocop.yml

@@ -10,8 +10,17 @@ Metrics/BlockLength:
 Metrics/AbcSize:
   Enabled: false
 
+Metrics/CyclomaticComplexity:
+  Enabled: false
+
+Metrics/PerceivedComplexity:
+  Enabled: false
+
 Style/ConditionalAssignment:
   Enabled: false
 
 Style/RaiseArgs:
-  Enabled: false
+  Enabled: false
+
+Style/SpecialGlobalVars:
+  EnforcedStyle: use_builtin_english_names

lib/rb/process.rb

@@ -35,7 +35,7 @@ def success?
     alias_method :ok?, :success?
   end
 
-  def self.run(*args, out: $stdout, err: $stderr, **options)
+  def self.run(*args, out: $stdout, err: $stderr, exception: false, **options)
     stdout_reader, stdout_writer  = IO.pipe
     stderr_reader, stderr_writer  = IO.pipe
     childs_io = [stdout_writer, stderr_writer]
@@ -94,10 +94,27 @@ def self.run(*args, out: $stdout, err: $stderr, **options)
     else
       Err.new(out_strio.string, err_strio.string, status)
     end
+  rescue Errno::ENOENT => e
+    raise e if exception
+
+    Err.new(nil, nil, $?)
   end
 
-  def self.output(...)
-    IO.popen(...).read
+  def self.output(*args, **options)
+    stdout_reader, stdout_writer = IO.pipe
+    pid = Process.spawn(*args, **options, out: stdout_writer)
+    stdout_writer.close
+
+    pid, status = Process.wait2(pid)
+    if status.exited? && status.success?
+      stdout_reader.read
+    else
+      nil
+    end
+  rescue Errno::ENOENT
+    nil
+  ensure
+    stdout_reader.close
   end
 
   def self.code(...)

spec/rb/process_spec.rb

@@ -42,10 +42,19 @@
     end
   end
 
+  it "not raise by default when Errno::ENOENT" do
+    expect { Process.run("unamea") }.not_to raise_error
+    expect { Process.run("unamea", exception: true) }.to raise_error
+  end
+
   it "get the output and not print" do
     expect(Process.output("uname").chomp).to eq "Linux"
   end
 
+  it "return nil when exec not success" do
+    expect(Process.output("unamea")).to be_nil
+  end
+
   it "get array by method chaining" do
     expect(Process.output("ls spec").each_line(chomp: true).to_a).to eq ["rb", "spec_helper.rb"]
   end