PATCH: tar -C completion

[Oliver Kiddle <okiddle@xxxxxxxxxxx>]

This is a patch I've had around for a while. It improves tar completion
when the -C option is used but there is still plenty of room for further
improvement. I've been meaning to fix _tar more properly but haven't got
around to it.

Oliver

Index: Completion/Unix/Command/_tar
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Unix/Command/_tar,v
retrieving revision 1.1
diff -u -r1.1 _tar
--- Completion/Unix/Command/_tar	2 Apr 2001 12:03:50 -0000	1.1
+++ Completion/Unix/Command/_tar	26 Feb 2003 10:26:13 -0000
@@ -13,7 +13,7 @@
 #    tar itself (GNU tar)
 #  - Things like --directory=... are also completed correctly.
 
-local _tar_cmd tf tmp tmpb del
+local _tar_cmd tf tmp tmpb del index
 
 # First we collect in `_tar_cmd' single letter options describing what
 # should be done with the archive and if it is compressed. This
@@ -95,24 +95,23 @@
 		 '*=DIR*:directory:_files -/' \
 		 '*=CONTROL*::version control:(t numbered nil existing never simple)'
 
-elif [[ ( CURRENT -gt 2 && "$words[CURRENT-1]" = -*f* &&
-          "$words[CURRENT-1]" != --* && "$words[CURRENT-1]" != -*Cf* ) ||
-        ( CURRENT -eq 3 && "$words[2]" = *f* && "$words[2]" != -* &&
-          "$words[2]" != *Cf* ) ||
-        ( CURRENT -gt 2 && "$words[CURRENT-2]" = -*Cf* &&
+elif [[ ( CURRENT -gt 2 && "$words[CURRENT-1]" = -[^C]#f* &&
+          "$words[CURRENT-1]" != --* ) ||
+        ( CURRENT -eq 3 && "$words[2]" = [^C]#f* && "$words[2]" != -* ) ||
+        ( CURRENT -gt 2 && "$words[CURRENT-2]" = -*C*f* &&
           "$words[CURRENT-2]" != --* && "$words[CURRENT-1]" != --* ) ||
-        ( CURRENT -eq 4 && "$words[2]" = *Cf* && "$words[2]" != -* ) ]]; then
+        ( CURRENT -eq 4 && "$words[2]" = *C*f* && "$words[2]" != -* ) ]]; then
 
   # ...archive files if we think they are wanted here.
 
   _tar_archive
 
-elif [[ ( CURRENT -gt 2 && "$words[CURRENT-1]" = -*Cf*) ||
-        ( CURRENT -eq 3 && "$words[2]" = *Cf* ) ]]; then
+elif [[ ( CURRENT -gt 2 && "$words[CURRENT-1]" = -[^f]#C*) ||
+        ( CURRENT -eq 3 && "$words[2]" = [^f]#C* ) ]]; then
 
   # a directory for -C
 
-  _files -/
+  _directories
 
 elif [[ ( "$_tar_cmd" = *[xt]* || -n $del ) && -n "$tf" ]]; then
 
@@ -145,6 +144,28 @@
   fi
 
   _wanted files expl 'file from archive' _multi_parts / _tar_cache_list
+elif (( CURRENT == 2 )); then
+  _values -s '' 'tar function' \
+    '(c t u x)A[append to and archive]' \
+    '(A t u x)c[create a new archive]' \
+    '(A c u x)t[list archive contents]' \
+    '(A c t x)u[update archive]' \
+    '(A c t u)x[extract files from an archive]' \
+    'v[verbose output]' \
+    'f[specify archive file or device]'
 else
+  if ! (( index=$words[(I)-*C*] )); then
+    if [[ $words[2] = [^f]#C* ]]; then
+      index=1
+    elif [[ $words[2] = *f*C* ]]; then
+      index=2
+    fi
+  fi
+  if (( index )); then
+    index="$~words[index+1]"
+    [[ $index = (.|..|)/* ]] || index=~+/$index
+    _files -W $index
+  else
     _files
+  fi
 fi
Index: Completion/Unix/Type/_tar_archive
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Unix/Type/_tar_archive,v
retrieving revision 1.1
diff -u -r1.1 _tar_archive
--- Completion/Unix/Type/_tar_archive	2 Apr 2001 11:41:59 -0000	1.1
+++ Completion/Unix/Type/_tar_archive	26 Feb 2003 10:26:13 -0000
@@ -13,7 +13,7 @@
 
 _description files expl 'archive file'
 
-if [[ "$1" = *[tx]* ]]; then
+if [[ "$1" = *[urtx]* ]]; then
   if [[ "$1" = *[zZ]* ]]; then
     _files "$expl[@]" -g '*.((tar|TAR).(gz|GZ|Z)|tgz)'
   elif [[ "$1" = *[Ijy]* ]]; then

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