begin-selection commands in tmux.conf has a problem.

[Hyungjin Ko]

• tmux version : 2.7
• Platform : Linux x86_64
• $TERM inside and outside of tmux : xterm-256color

if-shell -b '[ "$(echo -e "$TMUX_VERSION\n"2.4 | sort -V | head -n1)" == "2.4" ]' \
  'bind -T copy-mode-vi "v" send-keys -X begin-selection; \
   bind -T copy-mode-vi "y" send-keys -X copy-pipe-and-cancel "pbcopy"; \
  '

these commands don't work.
but I changed them not to include 'if sentence', and they do work.

bind-key -T copy-mode-vi "v" send-keys -X begin-selection
bind-key -T copy-mode-vi "y" send-keys -X copy-pipe-and-cancel "pbcopy"

I don't know why if-sentence does not work in tmux 2.7.

[Jongwook Choi]

I think it works for me with tmux 3.0 so the syntax should work.

Can you check the output of the following?

$ echo -e "$TMUX_VERSION\n"2.4 | sort -V

[Hyungjin Ko]

the output is the following

2.4
2.7

I think that if phrase is correct, but I don't know why it doesn't work. Let me take a closer look.

[Jongwook Choi]

Confirmed it is not working on older tmux versions.

The problem was that double equal (==) was being used to compare if two strings are equal, but this is wrong. I should use single equal (=) as the string equality operator.

Please let me know if it works for you!