add(tmux): copy support for linux

Brewfile

@@ -58,6 +58,8 @@ if OS.mac?
     mas "ColorSlurp", id: 1287239339
     mas "Bear", id: 1091189122
     mas "1Blocker", id: 1107421413
+elsif OS.linux?
+    brew "xclip"
 end
 
 tap "homebrew/bundle"
@@ -96,4 +98,3 @@ brew "wdiff"
 brew "wget"
 brew "z"
 brew "zsh"
-

tmux/tmux.conf.symlink

@@ -83,12 +83,19 @@ unbind [
 bind Escape copy-mode
 unbind p
 bind p paste-buffer
-bind -Tcopy-mode-vi 'v' send -X begin-selection
-bind -Tcopy-mode-vi 'y' send -X copy-pipe-and-cancel "tmux save-buffer - | reattach-to-user-namespace pbcopy"
-
-# Buffers to/from Mac clipboard, yay tmux book from pragprog
-bind C-c run "tmux save-buffer - | reattach-to-user-namespace pbcopy"
-bind C-v run "tmux set-buffer $(reattach-to-user-namespace pbpaste); tmux paste-buffer"
+bind -T copy-mode-vi v send -X begin-selection
+
+if-shell "uname | grep -q Darwin" {
+    bind -T copy-mode-vi y send -X copy-pipe-and-cancel 'tmux save-buffer - | pbcopy'; \
+    bind C-c run 'tmux save-buffer - | pbcopy'; \
+    bind C-v run 'tmux set-buffer "$(pbpaste)"; tmux paste-buffer'
+}
+
+if-shell '[[ $(uname -s) = Linux ]]' {
+    bind -T copy-mode-vi y send -X copy-pipe-and-cancel 'xclip -i -sel clipboard'; \
+    bind C-c run "tmux save-buffer - | xclip -i -sel clipboard"; \
+    bind C-v run 'tmux set-buffer "$(xclip -o -sel clipboard)"; tmux paste-buffer'
+}
 
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 ### Color & Style Settings ###