Re: Bug in _path_files

[Peter Stephenson <pws@xxxxxxx>]

Vin Shelton wrote:
> Hello,
> 
> Running from the latest CVS sources, the following gives me an error:
> 
> Wed 7 15:10; ls $SRCROOT/<TAB>
> _path_files:211: bad pattern: [^\
> 
> Apparently, this was caused by Peter's change to subst.c.  I tried to
> modify _path_files by taking out the double backslash at line 211, but
> that did not produce the desired results.

(You would need to replace the two backslashes with a single one.)

Whoops, it seems the old fudge was documented and used in various
places.  Since it doesn't work properly I still think we need to change
it, however.

I've replaced the completion code in such a way that it doesn't matter,
since the slashes all appear inside parameters.

Not quite sure what to do about 4.0 --- I applied the first patch but
maybe it's better to leave it and document the bug.

Index: README
===================================================================
RCS file: /cvsroot/zsh/zsh/README,v
retrieving revision 1.11
diff -u -r1.11 README
--- README	2 May 2003 10:58:52 -0000	1.11
+++ README	8 May 2003 09:59:44 -0000
@@ -39,6 +39,15 @@
 option is enabled, as it is by default) no longer expands aliases.  It was
 felt this feature was underused and confusing.
 
+In 4.0, a literal `/' was quoted in the `src' text of a substitution of the
+form `${foo/src/rep}' or ${foo//src/rep} with two backslashes.  This was
+documented, but inconsistent with normal quoting conventions and poorly
+implemented.  The `/' now requires only one backslash to quote it whether
+or not the expression occurs in double quotes.  For example:
+  % foo=word/bird
+  % print ${foo/\//-} "${foo/\//+}"
+  word-bird word+bird
+
 Documentation
 -------------
 
Index: Completion/Unix/Command/_cvs
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Unix/Command/_cvs,v
retrieving revision 1.18
diff -u -r1.18 _cvs
--- Completion/Unix/Command/_cvs	12 Mar 2003 04:43:50 -0000	1.18
+++ Completion/Unix/Command/_cvs	8 May 2003 09:59:44 -0000
@@ -611,7 +611,7 @@
 
 (( $+functions[_cvs_root] )) ||
 _cvs_root () {
-  local cvspassfile id
+  local cvspassfile id slash
 
   typeset -gU _cvs_roots
 
@@ -622,7 +622,8 @@
       id="$(LC_ALL=C ls -l "$cvspassfile")"
     fi
     if [[ "$id" != "$_cvs_pass_id" ]]; then
-      _cvs_roots=($_cvs_roots ${${${${(f)"$(<$cvspassfile)"}#/1 }%% *}/:2401\\//:/})
+      slash=/
+      _cvs_roots=($_cvs_roots ${${${${(f)"$(<$cvspassfile)"}#/1 }%% *}/:2401${slash}/:/})
       _cvs_pass_id="$id"
     fi
   fi
@@ -918,13 +919,13 @@
 (( $+functions[_cvs_modified_entries] )) ||
 _cvs_modified_entries () {
   if _cvs_loadstat; then
-    local expl match linedir realdir pat
+    local expl match linedir realdir pat slash=/
     match=()
     : ${PREFIX:#(#b)(*/)(*)}
     linedir="$match[1]"
     realdir=${(e)~linedir}
     [[ -f "$realdir"CVS/Entries ]] &&
-    [[ -n ${pat::="${(@j:|:)${(@)${(@)${(@)${(@)${(@)${(@M)${(@f)"$(<"$realdir"CVS/Entries)"}:#/*}#/}/\\/[^\\/]#\\///}%/[^/]#/[^/]#}:#${(j:|:)~${${${${(f)"$(LC_ALL=C builtin stat -gn +mtime -F '%a %b %e %T %Y' ${realdir}*(D) 2>/dev/null)"}##*/}/ //}//(#m)[][*?()<|^~#\\]/\\$MATCH}}}%%/*}//(#m)[][*?()<|^~#\\]/\\$MATCH}"} ]] &&
+    [[ -n ${pat::="${(@j:|:)${(@)${(@)${(@)${(@)${(@)${(@M)${(@f)"$(<"$realdir"CVS/Entries)"}:#/*}#/}/${slash}[^${slash}]#${slash}//}%/[^/]#/[^/]#}:#${(j:|:)~${${${${(f)"$(LC_ALL=C builtin stat -gn +mtime -F '%a %b %e %T %Y' ${realdir}*(D) 2>/dev/null)"}##*/}/ //}//(#m)[][*?()<|^~#\\]/\\$MATCH}}}%%/*}//(#m)[][*?()<|^~#\\]/\\$MATCH}"} ]] &&
     _wanted files expl 'modified file' _path_files -g "$pat"
   else
     _cvs_existing_entries
Index: Completion/Unix/Command/_perforce
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Unix/Command/_perforce,v
retrieving revision 1.6
diff -u -r1.6 _perforce
--- Completion/Unix/Command/_perforce	25 Apr 2003 11:19:09 -0000	1.6
+++ Completion/Unix/Command/_perforce	8 May 2003 09:59:44 -0000
@@ -906,7 +906,7 @@
     # by various logical operators.  The `=' could be a comparison,
     # but we don't currently bother with that here; it's a bit cumbersome
     # to complete.
-    local line type oldifs=$IFS IFS= key value
+    local line type oldifs=$IFS IFS= key value slash=/
     local match mbegin mend
     # This is simply to split out two space-delimited words a backreferences.
     local m2words
@@ -962,7 +962,7 @@
 
     for key in ${(k)p4fields}; do
 	if [[ -n ${p4values[$key]} ]]; then
-	    valuespec+=("${key}:${p4fields[$key]}:(${p4values[$key]//\\// })")
+	    valuespec+=("${key}:${p4fields[$key]}:(${p4values[$key]//$slash/ })")
 	elif [[ $key = job ]]; then
 	    # Nothing special for jobs; add our own completion.
 	    valuespec+=("${key}:Perforce job:_perforce_jobs")
Index: Completion/Unix/Command/_rsync
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Unix/Command/_rsync,v
retrieving revision 1.5
diff -u -r1.5 _rsync
--- Completion/Unix/Command/_rsync	21 May 2002 07:44:58 -0000	1.5
+++ Completion/Unix/Command/_rsync	8 May 2003 09:59:44 -0000
@@ -31,13 +31,14 @@
   _describe "remote modules" remmodules -S/
 
 elif [[ -prefix 1 *: ]]; then
-  local remfiles remdispf remdispd
+  local remfiles remdispf remdispd slash
 
   compset -P 1 '*:'
 
   if zstyle -T ":completion:${curcontext}:" remote-access; then
+    slash=/
     remfiles=(${(f)"$(ssh -a -x ${words[CURRENT]%:*} ls -d1F ${${${words[CURRENT
-]#*:}:h}/\\/(#e)/}/\* 2>/dev/null)"})
+]#*:}:h}/${slash}(#e)/}/\* 2>/dev/null)"})
 
     remdispf=(${remfiles:#*/})
     remdispd=(${(M)remfiles:#*/})
@@ -46,7 +47,7 @@
       compadd -d remdispf ${${remfiles:#*/}/[*=@|](#e)/}
       
     _wanted files expl 'remote files and directories' \
-      compadd -S/ -d remdispd ${${(M)remfiles:#*/}/\\/(#e)/}
+      compadd -S/ -d remdispd ${${(M)remfiles:#*/}/${slash}(#e)/}
   else
     _message -e remote-files 'remote files'
   fi
Index: Completion/Unix/Type/_path_files
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Unix/Type/_path_files,v
retrieving revision 1.22
diff -u -r1.22 _path_files
--- Completion/Unix/Type/_path_files	26 Feb 2003 14:32:50 -0000	1.22
+++ Completion/Unix/Type/_path_files	8 May 2003 09:59:45 -0000
@@ -208,7 +208,8 @@
   eval 'realpath=${(e)~linepath}' 2>/dev/null
   [[ -z "$realpath" || "$realpath" = "$linepath" ]] && return 1
   pre="${pre#${linepath}}"
-  i="${#linepath//[^\\/]}"
+  i='[^/]'
+  i="${#linepath//$i}"
   orig="${orig[1,(in:i:)/][1,-2]}"
   donepath=
   prepaths=( '' )
Index: Doc/Zsh/expn.yo
===================================================================
RCS file: /cvsroot/zsh/zsh/Doc/Zsh/expn.yo,v
retrieving revision 1.45
diff -u -r1.45 expn.yo
--- Doc/Zsh/expn.yo	2 May 2003 10:25:32 -0000	1.45
+++ Doc/Zsh/expn.yo	8 May 2003 09:59:45 -0000
@@ -510,8 +510,8 @@
 var(pattern) must match at the start of the string, or `tt(%)', in
 which case it must match at the end of the string.  The var(repl) may
 be an empty string, in which case the final `tt(/)' may also be omitted.
-To quote the final `tt(/)' in other cases it should be preceded by two
-backslashes (i.e., a quoted backslash); this is not necessary if the
+To quote the final `tt(/)' in other cases it should be preceded by a
+single backslash; this is not necessary if the
 `tt(/)' occurs inside a substituted parameter.  Note also that the `tt(#)'
 and `tt(%)' are not active if they occur inside a substituted parameter,
 even at the start.

-- 
Peter Stephenson <pws@xxxxxxx>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 692070


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