PATCH: Problem with _expand, _path_files, and $(command)

["Bart Schaefer" <schaefer@xxxxxxxxxxxxxxxxxxxxxxx>]

The first problem is that the stderr of the command messes up the display.
Then if the command doesn't produce any output, assorted bad things happen
at line 80 of _expand:

zagzig[120] echo $(stty -a)stty: standard input: Inappropriate ioctl for device

_expand:80: unknown file attribute
zagzig[121] echo $(exit 0)
_expand:80: missing end of string

Both of those examples break _complete_debug, because they're treated as
fatal errors (just like the problem we were having with ${(e)garbage} a
while ago).

If I remove _expand from the completer style, I get this:

zagzig[86] echo $(exit 0)
_path_files:325: missing end of string

After the patch below, there's still a problem with _path_files, because
the parens in $(exit 0) are interpreted as enclosing a glob qualifier, so
something else goes haywire:

zagzig[88] echo $(exit 0)
zagzig[88] echo \$\*\(exit\ 0Om\)

Of course the best thing to do at lines 64-66 of _expand, would be to
capture the standard error of the $(...) and use `_message -r' to display
it.  However, I can't think of any way to capture stderr that wouldn't
cause the entire exp=(...) to be forced into a subshell, except by using
a temp file, which is unacceptable overhead in the "normal" case.

--- zsh-forge/current/Completion/Core/_expand	Thu Jun 29 01:32:02 2000
+++ zsh-3.1.9/Completion/Core/_expand	Sun Jul  2 09:35:37 2000
@@ -63,7 +63,7 @@
       eval exp\=\( ${${(q)exp}:gs/\\{/\{/:gs/\\}/\}/} \)
   exp=( ${${(e)exp//\\[ 	
 ]/ }//(#b)([ 	
-])/\\$match[1]} )
+])/\\$match[1]} ) 2>/dev/null
 else
   exp=( ${exp:s/\\\$/\$} )
 fi
@@ -77,7 +77,7 @@
 # Now try globbing.
 
 [[ "$force" = *g* ]] || zstyle -T ":completion:${curcontext}:" glob &&
-    exp=( ${~exp} )
+    eval 'exp=( ${~exp} )' 2>/dev/null
 
 # If we don't have any expansions or only one and that is the same
 # as the original string, we let other completers run.
--- zsh-forge/current/Completion/Core/_path_files	Mon Jun 19 09:47:27 2000
+++ zsh-3.1.9/Completion/Core/_path_files	Sun Jul  2 09:29:39 2000
@@ -322,7 +322,7 @@
     else
       compfiles -p$cfopt tmp1 accex "$skipped" "$_matcher" '' fake "$pats[@]"
     fi
-    tmp1=( $~tmp1 )
+    eval 'tmp1=( $~tmp1 )' 2>/dev/null
 
     if [[ -n "$PREFIX$SUFFIX" ]]; then
       # See which of them match what's on the line.

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com

Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net