call ps only once and be more intelligent when finding the PIDs (12640)

ChangeLog

@@ -1,5 +1,9 @@
 2000-08-15  Sven Wischnowsky  <wischnow@zsh.org>
 
+	* 12640: Completion/Builtins/_pids, Completion/Builtins/_zstyle,
+ 	Doc/Zsh/compsys.yo: call ps only once and be more intelligent when
+ 	finding the PIDs
+	
 	* 12635: Completion/Builtins/_pids: small improvement to allow
  	lists where the pid is not in the first column
 	

Completion/Builtins/_pids

@@ -3,7 +3,7 @@
 # If given the `-m <pattern>' option, this tries to complete only pids
 # of processes whose command line match the `<pattern>'.
 
-local out list expl match desc listargs args all nm ret=1
+local out pids index list expl match desc listargs args all nm ret=1
 
 _tags processes || return 1
 
@@ -22,24 +22,26 @@ fi
 
 zstyle -s ":completion:${curcontext}:processes" command args
 
-out="$(_call processes ps 2>/dev/null)"
+out=( "${(@f)$(_call processes ps 2>/dev/null)}" )
+desc="$out[1]"
+out=( "${(@M)out[2,-1]:#${~match}}" )
+
+if [[ "$desc" = (#i)(|*[[:blank:]])pid(|[[:blank:]]*) ]]; then
+  index="${#desc[1,(r)(#i)[[:blank:]]pid]}"
+  pids=( "${(@)${(@M)out#${(l:index::?:)~:-}[^[:blank:]]#}##*[[:blank:]]}" )
+else
+  pids=( "${(@)${(@M)out##[^0-9]#[0-9]#}##*[[:blank:]]}" )
+fi
 
 if zstyle -T ":completion:${curcontext}:processes" verbose; then
-  zstyle -s ":completion:${curcontext}:processes-list" command listargs
-  (( $#listargs )) || listargs=( "$args[@]" )
-  if [[ "$listargs" = "$args" ]]; then
-    list=("${(@Mr:COLUMNS-1:)${(f@)out}[2,-1]:#${~match}}")
-  else
-    list=("${(@Mr:COLUMNS-1:)${(f@)$(_call processes-list ps 2>/dev/null)}[2,-1]:#${~match}}")
-  fi
+  list=( "${(@Mr:COLUMNS-1:)out}" )
   desc=(-ld list)
 else
   desc=()
 fi
 
 _wanted processes expl 'process ID' \
-    compadd "$@" "$desc[@]" "$all[@]" - \
-        ${${${(M)${(f)"${out}"}[2,-1]:#${~match}}## #}%% *} && ret=0
+    compadd "$@" "$desc[@]" "$all[@]" -a pids && ret=0
 
 if [[ -n "$all" ]]; then
   zstyle -s ":completion:${curcontext}:processes" insert-ids out || out=menu

Completion/Builtins/_zstyle

@@ -103,9 +103,9 @@ displays expansions extensions files fonts functions globbed-files groups
 history-words hosts indexes jobs keymaps keysyms local-directories
 libraries limits manuals maps messages modifiers modules my-accounts
 named-directories names nicknames options original other-accounts packages
-parameters path-directories paths pods ports prefixes processes ps regex
-sequences sessions signals strings tags targets types urls users values
-warnings widgets windows zsh-options)
+parameters path-directories paths pods ports prefixes processes
+processes-names ps regex sequences sessions signals strings tags targets
+types urls users values warnings widgets windows zsh-options)
 
 _arguments -C ':context:->contexts' ':style:->styles' '*:argument:->style-arg'
 

Doc/Zsh/compsys.yo

@@ -744,11 +744,6 @@ kindex(processes, completion tag)
 item(tt(processes))(
 for process identifiers
 )
-kindex(processes-list, completion tag)
-item(tt(processes-list))(
-used to look up the tt(command) style when generating the list to
-display for process identifiers
-)
 kindex(processes-names, completion tag)
 item(tt(processes-names))(
 used to look up the tt(command) style when generating the names of
@@ -934,11 +929,14 @@ example to avoid calling a shell function with the same name as an external
 command.
 
 As an example, the function generating process IDs as matches uses this
-style with the tt(processes) tag to generate the IDs to complete and when
-the tt(verbose) style is `true', it uses this style with the
-tt(processes-list) tag to generate the strings to display.  When using
-different values for these two tags one should ensure that the process
-IDs appear in the same order in both lists.
+style with the tt(processes) tag to generate the IDs to complete and
+the list of processes to display (if the tt(verbose) style is `true').
+The list produced by the command should look like the output of the
+tt(ps) command.  The first line is not displayed, but is searched for
+the string `tt(PID)' (or `tt(pid)') to find the position of the
+process IDs in the following lines.  If the line does not contain
+`tt(PID)', the first numbers in each of the other lines are taken as the 
+process IDs to complete.
 )
 kindex(completer, completion style)
 item(tt(completer))(