Re: Recursive Completition

[Peter Stephenson <p.w.stephenson@ntlworld.com>]

Here's a second version with documentation.

Index: Completion/Unix/Type/_files
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Unix/Type/_files,v
retrieving revision 1.13
diff -p -u -r1.13 _files
--- Completion/Unix/Type/_files	19 Mar 2010 16:38:26 -0000	1.13
+++ Completion/Unix/Type/_files	21 Aug 2012 18:24:15 -0000
@@ -1,7 +1,7 @@
 #compdef -redirect-,-default-,-default-
 
 local opts tmp glob pat pats expl tag i def descr end ign ret=1 match tried
-local type sdef ignvars ignvar
+local type sdef ignvars ignvar prepath oprefix rfiles rfile
 
 zparseopts -a opts \
     '/=tmp' 'f=tmp' 'g+:-=tmp' q n 1 2 P: S: r: R: W: X+: M+: F: J+: V+:
@@ -118,7 +118,21 @@ for def in "$pats[@]"; do
       while _next_label "$tag" expl "$descr"; do
         _comp_ignore=( $_comp_ignore $ign )
         if [[ -n "$end" ]]; then
-          _path_files -g "$pat" "$opts[@]" "$expl[@]" && ret=0
+          if _path_files -g "$pat" "$opts[@]" "$expl[@]"; then
+	    ret=0
+	  elif [[ $PREFIX$SUFFIX != */* ]] && zstyle -a ":completion:${curcontext}:$tag" recursive-files rfiles; then
+	    for rfile in $rfiles; do
+	      if [[ $PWD/ = ${~rfile} ]]; then
+		for prepath in **/*(/); do
+		  oprefix=$PREFIX
+		  PREFIX=$prepath/$PREFIX
+		  _path_files -g "$pat" "$opts[@]" "$expl[@]" && ret=0
+		  PREFIX=$oprefix
+		done
+		break
+	      fi
+	    done
+	  fi
         else
           _path_files "$expl[@]" -g "$pat" "$opts[@]" && ret=0
         fi
Index: Doc/Zsh/compsys.yo
===================================================================
RCS file: /cvsroot/zsh/zsh/Doc/Zsh/compsys.yo,v
retrieving revision 1.247
diff -p -u -r1.247 compsys.yo
--- Doc/Zsh/compsys.yo	14 Feb 2012 17:01:17 -0000	1.247
+++ Doc/Zsh/compsys.yo	21 Aug 2012 18:24:15 -0000
@@ -2355,6 +2355,28 @@ found, or var(max) words have been tried
 
 The default is to complete all words from the history at once.
 )
+kindex(recursive-files, completion style)
+item(tt(recursive-files))(
+If this style is set, its value is an array of patterns to be
+tested against `tt($PWD/)': note the trailing slash, which allows
+directories in the pattern to be delimited unambiguously by including
+slashes on both sides.  If an ordinary file completion fails
+and the word on the command line does not yet have a directory part to its
+name, the style is retrieved using the same tag as for the completion
+just attempted, then the elements tested against tt($PWD/) in turn.
+If one matches, then the shell reattempts completion by prepending the word
+on the command line with each directory in the expansion of tt(**/*(/))
+in turn.  Typically the elements of the style will be set to restrict
+the number of directories beneath the current one to a manageable
+number, for example `tt(*/.git/*)'.
+
+For example,
+
+example(zstyle ':completion:*' recursive-files '*/zsh/*')
+
+If the current directory is tt(/home/pws/zsh/Src), then
+tt(zle_tr)em(TAB) can be completed to tt(Zle/zle_tricky.c).
+)
 kindex(regular, completion style)
 item(tt(regular))(
 This style is used by the tt(_expand_alias) completer and bindable 

-- 
Peter Stephenson <p.w.stephenson@ntlworld.com>
Web page now at http://homepage.ntlworld.com/p.w.stephenson/