tcsh bug 3

Issue

You can use history modifiers to edit words from your history, :t and :r are useful for taking off the pathname and postfix, respectively. From the man page:

  :t       Remove  all  leading  pathname  components,  leaving the
           tail.

  :r       Remove a filename extension  ‘.xxx’,  leaving  the  root
           name.

So as an example, we can remove everything but the base word of a full path (no path or postfix) with something like this:

% alias word 'echo word is \!^:t:r'

But unfortunately at some point recently the :t started to fail when there was no path. This is not consistent with :r, which does just fine without a postfix.

Example

# Current version of tcsh is 6.24.12:
% echo $tcsh
6.24.12

# :t only works if we have a path
% alias base 'echo base is \!^:t'  
% base /foo/bar
base is bar
% base bar
Modifier failed.

# :r works fine either way
% alias nopost 'echo nopost is \!^:r'
% nopost foo.bar
nopost is foo
% nopost foo
nopost is foo

I am confident that this was not the case previously (possibly back as far as 6.14.00, though I am unable to compile that version currently)

Fix

Same day fix from Kimmo!

github patch