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Support copy command on windows and wsl #1153

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Support copy command on windows and wsl #1153

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12 changes: 9 additions & 3 deletions lib/irb/command/copy.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -39,8 +39,12 @@ def execute(arg)
private

def copy_to_clipboard(text)
IO.popen(clipboard_program, 'w') do |io|
io.write(text)
if Gem.win_platform?
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@tompng tompng Dec 28, 2025

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There's a flag --disable-gems

$ ruby --disable-gems -e binding.irb      
irb(main):001> Gem
uninitialized constant Gem (NameError)

I think it's better to add a guard like defined?(Gem) &&

Kernel.system("powershell.exe", "-NoProfile", "-Command", "Set-Clipboard", "-Value", text)
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@tompng tompng Dec 28, 2025

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On Windows, passing text via stdin does not work reliably in IRB

This might be fixed in ruby/reline#875
Although I also think adding this workaround for a while is worth. What do you think?

else
IO.popen(clipboard_program, 'w') do |io|
io.write(text)
end
end

raise IOError.new("Copying to clipboard failed") unless $? == 0
Expand All @@ -54,6 +58,8 @@ def copy_to_clipboard(text)
def clipboard_program
@clipboard_program ||= if IRB.conf[:COPY_COMMAND]
IRB.conf[:COPY_COMMAND]
elsif executable?("clip.exe")
"clip.exe"
elsif executable?("pbcopy")
"pbcopy"
elsif executable?("xclip")
Expand All @@ -66,7 +72,7 @@ def executable?(command)
end

def clipboard_available?
!!clipboard_program
Gem.win_platform? || !!clipboard_program
end
end
end
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