[Asdf-devel] native-namestring in asdf/cache:normalize-namestring?

[Orivej Desh]

> 1. REPLICATION:
> 
> Would you please let me know how to replicate this error?
> 
> I was hoping that (ql:quickload "libssh2") would get this for me, but
> not in my current client.

I can replicate it reliable by cleaning (renaming, actually)
~/.cache/common-lisp and loading libssh2.  Is there another way
to ensure that COMPUTE-ACTION-STAMP is called with :JUST-DONE NIL?  (I
don't understand how exactly this affects JUST-DONE, but it does.)

* * *

> I'm not convinced that these pathnames with invalid namestring would
> have a valid native-namestring (did you try?)

They have:

     (uiop:native-namestring (make-pathname :name "a.b" :type nil))
     => "a.b"

> using native-namestring in asdf/cache:normalize-namestring would be
> quite impractical, since the function CL:FILE-WRITE-DATE that we
> subsequently use requires a Lisp namestring.

I anticipated this would be a problem.  So, NATIVE-NAMESTRING is not acceptable.

> I believe this is a bug in CFFI, and ASDF cannot do much about it. I'm
> copying the CFFI-devel mailing-list.

I hoped that ASDF would smooth out working with pathnames for
CFFI-GROVEL as much as possible; providing UIOP seems to be this much.

> (defun exe-filename (defaults)
>    (let ((defaults (uiop:ensure-pathname defaults :namestring :native :want-non-wild t :want-file t))) ;; YMMV
>       (uiop:subpathname defaults (uiop:parse-unix-namestring (pathname-name defaults) :type *exe-extension*)))

Thank you for this example.

If DEFAULTS is a pathname of an existing file, ENSURE-PATHNAME seems
unnecessary.  Under this assumption, the following definition appears
equivalent:

     (defun exe-filename (defaults)
       (uiop:parse-unix-namestring (pathname-name defaults)
                                   :type *exe-extension*
                                   :defaults defaults))
     
(N.B. Neither definition prepends "./" to relative paths.)