Re: BUG: cd '' doesn't produce an error

[Peter Stephenson <pws@xxxxxxx>]

Peter Stephenson <pws@xxxxxxx> wrote:
>           Otherwise [if the argument is not -], if a directory named arg
>           is not found in the current directory and arg does not begin
>           with a slash, search each component of the  shell  parameter
>           cdpath.
> 
> This isn't actually quite right, since if . is in $cdpath but not at
> the start it doesn't search . straight away.  So at least the
> description needs improving (this isn't special to a null string).

Here's a first attempt...

Index: Doc/Zsh/builtins.yo
===================================================================
RCS file: /cvsroot/zsh/zsh/Doc/Zsh/builtins.yo,v
retrieving revision 1.81
diff -u -r1.81 builtins.yo
--- Doc/Zsh/builtins.yo	7 Nov 2005 09:37:34 -0000	1.81
+++ Doc/Zsh/builtins.yo	4 Jan 2006 17:47:23 -0000
@@ -160,12 +160,22 @@
 current directory to var(arg), or to the value of tt($HOME) if
 var(arg) is not specified.  If var(arg) is `tt(-)', change to the
 value of tt($OLDPWD), the previous directory.
-Otherwise, if a directory named var(arg) is not found in the current
-directory and var(arg) does not begin with a slash, search each
-component of the shell parameter tt(cdpath).  If no directory is found
-and the option tt(CDABLE_VARS) is set, and a parameter named var(arg)
-exists whose value begins with a slash, treat its value as the
-directory.  In that case, the parameter is added to the named
+
+Otherwise, if var(arg) begins with a slash, attempt to change to the
+director given by var(arg).
+
+If var(arg) does not begin with a slash, the behaviour depends on whether
+the current directory `tt(.)' occurs in the list of directories contained
+in the shell parameter tt(cdpath).  If it does not, first attempt to change
+to the directory var(arg) under the current directory, and if that fails
+but tt(cdpath) is set and contains at least one element attempt to change
+to the directory var(arg) under each component of tt(cdpath) in turn until
+successful.  If `tt(.)' occurs in tt(cdpath), then tt(cdpath) is searched
+strictly in order so that `tt(.)' is only tried at the appropriate point.
+
+If no directory is found, the option tt(CDABLE_VARS) is set, and a
+parameter named var(arg) exists whose value begins with a slash, treat its
+value as the directory.  In that case, the parameter is added to the named
 directory hash table.
 
 The second form of tt(cd) substitutes the string var(new)

-- 
Peter Stephenson <pws@xxxxxxx>                  Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK                          Tel: +44 (0)1223 692070


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