zsh/tmux: Show host/user/branch/path in tmux statusbar

By setting the window title to a dynamic host/user/branch/path snippet
in zsh's precmd() we can shorten the prompt in tmux and display
important info only in the statusbar.

zshfiles/zshrc

@@ -193,49 +193,87 @@
 # }}}
 # Prompt {{{
 	if [[ $TERM =~ '256color' ]]; then
-		# VCS info {{{
-			autoload -Uz vcs_info
+		autoload -Uz vcs_info
 
-			precmd () { vcs_info }
+		zstyle ':vcs_info:*' get-revision true
+		zstyle ':vcs_info:*' check-for-changes true
+		zstyle ':vcs_info:*' formats '%u%c|%s ⭠ %b'
+		zstyle ':vcs_info:*' actionformats '%c%u|%s@%a ⭠ %b'
+		zstyle ':vcs_info:*' branchformat '%b@%r'
+		zstyle ':vcs_info:*' unstagedstr "%{$fg_no_bold[red]%}"
+		zstyle ':vcs_info:*' stagedstr "%{$fg_no_bold[yellow]%}"
+		zstyle ':vcs_info:*' enable git hg svn
 
-			zstyle ':vcs_info:*' get-revision true
-			zstyle ':vcs_info:*' check-for-changes true
-			zstyle ':vcs_info:*' formats ' %u%c|%s ⭠ %b '
-			zstyle ':vcs_info:*' actionformats ' %c%u|%s@%a ⭠ %b '
-			zstyle ':vcs_info:*' branchformat ' %b@%r '
-			zstyle ':vcs_info:*' unstagedstr "%{$fg_no_bold[red]%}"
-			zstyle ':vcs_info:*' stagedstr "%{$fg_no_bold[yellow]%}"
-			zstyle ':vcs_info:*' enable git hg svn
+		zstyle ':vcs_info:git*:*' formats '%s ⭠ %b'
+		zstyle ':vcs_info:git*:*' actionformats '%c%u|%s@%a:%b@%.5i'
 
-			zstyle ':vcs_info:git*:*' formats '%s ⭠ %b '
-			zstyle ':vcs_info:git*:*' actionformats ' %c%u|%s@%a:%b@%.5i '
-		# }}}
+		precmd () {
+			vcs_info
 
-		C_RESET='%{%}'
+			if [[ $TMUX != '' ]]; then
+				# Dynamic tmux status (path/branch stuff)
+				#
+				# This is a hack which sets window-specific stuff as the
+				# window's title, so the title gets useless in e.g. dwm's
+				# statusbar. This has to be done because tmux doesn't
+				# support custom dynamic variables in the statusbar.
+				STATUS=''
+				STATUS_USER_FG=153
+				STATUS_USER_BG=31
 
-		C_USER=$C_RESET'%{[1m[38;5;117m[48;5;31m%}'
-		C_USER_SEP=$C_RESET'%{[48;5;237m[38;5;31m%}'
-		C_PWD=$C_RESET'%{[38;5;248m[48;5;237m%}'
-		C_PWD_SEP=$C_RESET'%{[38;5;237m%}'
+				if [[ $UID == 0 ]]; then
+					STATUS_USER_FG=231
+					STATUS_USER_BG=160
+				fi
 
-		if [[ ! -z "$SSH_CLIENT" ]]; then
-			SSHPROMPT=$C_RESET'%{%} ⭤ %M %{%}'
+				if [[ ! -z "$SSH_CLIENT" ]]; then
+					STATUS=$STATUS"#[fg=colour220,bg=colour166] ⭤ `hostname` #[fg=colour166,bg=colour$STATUS_USER_BG]⮀"
+				fi
 
-			if [[ $UID == 0 ]]; then
-				SSHPROMPT=$SSHPROMPT'%{%}⮀'
-			else
-				SSHPROMPT=$SSHPROMPT'%{%}⮀'
+				STATUS=$STATUS"#[fg=colour$STATUS_USER_FG,bg=colour$STATUS_USER_BG,bold] `whoami` #[fg=colour$STATUS_USER_BG,bg=colour239,nobold]⮀"
+				if [[ $vcs_info_msg_0_ != '' ]]; then
+					STATUS=$STATUS" #[fg=colour248]${vcs_info_msg_0_} ⮁"
+				fi
+				STATUS=$STATUS"#[fg=colour231,bg=colour239,bold] `pwd` #[fg=colour239,bg=colour236,nobold]⮀"
+
+				# Set the status bar info as the window title
+				echo -n ']2;'$STATUS''
 			fi
-		fi
+		}
 
-		if [[ $UID == 0 ]]; then
-			# Highlight root user
-			C_USER=$C_RESET'%{%}'
-			C_USER_SEP=$C_RESET'%{%}'
+		if [[ $TMUX != '' ]]; then
+			# Show shorter prompt in tmux because the statusbar has path/branch info
+			if [[ $UID != 0 ]]; then
+				PROMPT='%{%}▶ %{%}'
+			else
+				PROMPT='%{%}▶ %{%}'
+			fi
+		else
+			C_RESET='%{%}'
+
+			C_USER=$C_RESET'%{%}'
+			C_USER_SEP=$C_RESET'%{%}'
+			C_PWD=$C_RESET'%{%}'
+			C_PWD_SEP=$C_RESET'%{%}'
+			if [[ ! -z "$SSH_CLIENT" ]]; then
+				SSHPROMPT=$C_RESET'%{%} ⭤ %M %{%}'
+
+				if [[ $UID == 0 ]]; then
+					SSHPROMPT=$SSHPROMPT'%{%}⮀'
+				else
+					SSHPROMPT=$SSHPROMPT'%{%}⮀'
+				fi
+			fi
+
+			if [[ $UID == 0 ]]; then
+				# Highlight root user
+				C_USER=$C_RESET'%{%}'
+				C_USER_SEP=$C_RESET'%{%}'
+			fi
+
+			PROMPT=$SSHPROMPT$C_USER' %n '$C_USER_SEP'⮀'$C_PWD' %3~ '$C_PWD_SEP'⮀'$C_RESET' '
+			RPROMPT='${vcs_info_msg_0_}'
 		fi
-
-		PROMPT=$SSHPROMPT$C_USER' %n '$C_USER_SEP'⮀'$C_PWD' %3~ '$C_PWD_SEP'⮀'$C_RESET' '
-		RPROMPT='${vcs_info_msg_0_}'
 	fi
 	# List prompt - don't ask 'do you want to see all ...' in menu selection {{{
 		LISTPROMPT=''