Re: precmd, preexec, and supplied prompt themes

[Clint Adams <clint@xxxxxxx>]

[moving to -workers]

>      Check out the zsh man page, section SPECIAL FUNCTIONS, or just search
>      for 'hook function'.  The long and short of it is that the prompt
>      themes should be using
>      
>      typeset -a precmd_functions
>      precmd_functions += my_prompt_precmd

Since there is no unregistration hook, how would you avoid the problem
of precmd_functions containing (my_prompt_precmd her_prompt_precmd
his_prompt_precmd my_prompt_precmd) when switching back and forth?

The clobbering below should now appear more explicit.

Index: Functions/Prompts/prompt_clint_setup
===================================================================
RCS file: /cvsroot/zsh/zsh/Functions/Prompts/prompt_clint_setup,v
retrieving revision 1.6
diff -u -r1.6 prompt_clint_setup
--- Functions/Prompts/prompt_clint_setup	7 Sep 2006 18:09:44 -0000	1.6
+++ Functions/Prompts/prompt_clint_setup	13 Oct 2007 13:26:07 -0000
@@ -36,7 +36,7 @@
   [[ -n "$WINDOW" ]] && p_win="$pc['\(']%{$fg_bold[$pcc[4]]%}$WINDOW$pc['\)']"
 
   p_userpwd="$pc['<']%{$fg_no_bold[$pcc[3]]%}%n@%m$p_win%{$fg_bold[$pcc[5]]%}:%{$fg_no_bold[$pcc[4]]%}%~$pc['>']"
-  [[ -f /proc/apm ]] && p_apm="%(2v.-%2v-.)"
+  p_git="%(2v.-%U%2v%u-.)"
 
   p_shlvlhist="%{$reset_color%}zsh%(2L./$SHLVL.) %B%h%b "
   p_rc="%(?..[%?%1v] )"
@@ -46,34 +46,28 @@
 
   prompt="$p_date$p_tty$p_plat$p_ver
 $p_userpwd
-$p_shlvlhist$p_rc$p_apm$p_end"
+$p_shlvlhist$p_rc$p_git$p_end"
   PS2='%(4_.\.)%3_> %E'
 
-  [[ -f /proc/apm ]] &&
-     precmd () { prompt_clint_precmd ; prompt_clint_apm_precmd } ||
-     precmd () { prompt_clint_precmd }
+  precmd () { prompt_clint_precmd }
   preexec () { }
 }
 
 prompt_clint_precmd () {
   setopt noxtrace noksharrays localoptions
   local exitstatus=$?
+  local git_dir git_ref
 
+  psvar=()
   [[ $exitstatus -ge 128 ]] && psvar[1]=" $signals[$exitstatus-127]" ||
 	psvar[1]=""
 
   [[ -o interactive ]] && jobs -l
 
-}
-
-prompt_clint_apm_precmd () {
-  setopt noxtrace noksharrays localoptions
-  local bat ac
-
-  bat=${${="$(</proc/apm)"}[7]/%/%%}
-  [[ ${${="$(</proc/apm)"}[4]} == "0x01" ]] && ac="AC+"
+  git_dir=$(git-rev-parse --git-dir 2> /dev/null) || return
+  git_ref=$(git-symbolic-ref HEAD 2> /dev/null) || git_ref="(no branch)"
+  psvar[2]=${ref#refs/heads/}
 
-  [[ $bat == ("100%"|"-1%") ]] && psvar[2]=() || psvar[2]="$ac$bat"
 }
 
 prompt_clint_setup "$@"