PATCH: _tar (autodetection of compression by GNU tar >= 1.14.91)

[Clint Adams <clint@zsh.org>]

Since version 1.14.91, GNU tar has autodetected compressed
archives.

Index: Completion/Unix/Command/_tar
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Unix/Command/_tar,v
retrieving revision 1.3
diff -u -r1.3 _tar
--- Completion/Unix/Command/_tar	27 Feb 2003 09:29:26 -0000	1.3
+++ Completion/Unix/Command/_tar	24 Jun 2006 19:24:54 -0000
@@ -21,6 +21,8 @@
 # from some of the possible long options, and from the second word if
 # that does not start with a hyphen.
 
+_pick_variant gnu=GNU unix --version
+
 tmp=("${(@M)words:#-[^-]*}")
 _tar_cmd="${(j::)tmp#-}"
 
Index: Completion/Unix/Type/_tar_archive
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Unix/Type/_tar_archive,v
retrieving revision 1.3
diff -u -r1.3 _tar_archive
--- Completion/Unix/Type/_tar_archive	21 Jan 2004 13:53:29 -0000	1.3
+++ Completion/Unix/Type/_tar_archive	24 Jun 2006 19:24:54 -0000
@@ -18,6 +18,8 @@
     _files "$expl[@]" -g '*.((tar|TAR).(gz|GZ|Z)|tgz)(-.)'
   elif [[ "$1" = *[Ijy]* ]]; then
     _files "$expl[@]" -g '*.(tar|TAR).bz2(-.)'
+  elif [[ "$_cmd_variant[$service]" == gnu ]]; then
+    _files "$expl[@]" -g '*.((tar|TAR).(gz|GZ|Z|bz2)|tgz)(-.)'
   else
     _files "$expl[@]" -g '*.(tar|TAR)(-.)'
   fi