get copy-pasting working with tmux v2.4

Author: tony

.tmux.conf

@@ -62,11 +62,6 @@ bind-key a send-prefix
 setw -g monitor-activity on
 set -g visual-activity on
 
-# Vi copypaste mode
-set-window-option -g mode-keys vi
-bind-key -t vi-copy 'v' begin-selection
-bind-key -t vi-copy 'y' copy-selection
-
 # hjkl pane traversal
 bind h select-pane -L
 bind j select-pane -D
@@ -94,6 +89,11 @@ set -g default-terminal "screen-256color"
 run-shell "tmux set-environment -g TMUX_VERSION_MAJOR $(tmux -V | cut -d' ' -f2 | cut -d'.' -f1 | sed 's/[^0-9]*//g')"
 run-shell "tmux set-environment -g TMUX_VERSION_MINOR $(tmux -V | cut -d' ' -f2 | cut -d'.' -f2 | sed 's/[^0-9]*//g')"
 
+# Vi copypaste mode
+set-window-option -g mode-keys vi
+if-shell "test '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -ge 4 \)'" 'bind-key -Tcopy-mode-vi v send -X begin-selection; bind-key -Tcopy-mode-vi y send -X copy-selection-and-cancel'
+if-shell '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -lt 4\) -o #{$TMUX_VERSION_MAJOR} -le 1' 'bind-key -t vi-copy v begin-selection; bind-key -t vi-copy y copy-selection'
+
 # status bar
 if-shell '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -lt 2\) -o #{$TMUX_VERSION_MAJOR} -le 1' 'set-option -g status-utf8 on'