Re: _canonical_path not working on *BSD

[Baptiste Daroussin <baptiste.daroussin@simstream.com>]

Quoting Peter Stephenson <pws@csr.com>:

> On Wed, 26 Mar 2008 17:38:24 +0100
> Pea <zsh@raveland.org> wrote:
>> This almost works:
>>
>> umount [TAB] gives me:
>> [pea@coredump:~]% umount
>>              /            /dev/sd0a    /dev/svnd0a  /home/pea
>>
>>
>> umout /[TAB] gives me:
>> [pea@coredump:~]% umount /
>> /            /dev/sd0a    /dev/svnd0a  /home/pea
>>
>>
>> But umount /d[TAB] or umount /de[TAB] or umount /h[TAB] give me
>> nothing...
>> It worked with readlinks
>
> Thanks for trying...  looks like my assumption about the status test
> was wrong.
>
> Index: Completion/Unix/Type/_canonical_paths
> ===================================================================
> RCS file: /cvsroot/zsh/zsh/Completion/Unix/Type/_canonical_paths,v
> retrieving revision 1.1
> diff -u -r1.1 _canonical_paths
> --- Completion/Unix/Type/_canonical_paths	28 May 2006 18:36:06 -0000	1.1
> +++ Completion/Unix/Type/_canonical_paths	26 Mar 2008 16:43:46 -0000
> @@ -27,18 +27,38 @@
>
>  shift 2
>
> -if (( ! $+commands[readlink] )); then
> +if ! zmodload -F zsh/stat b:zstat 2>/dev/null; then
>    _wanted "$tag" expl "$desc" compadd $__gopts $@ && ret=0
>    return ret
>  fi
>
> +typeset REPLY
>  typeset -a matches files
>
> +_canonical_paths_get_canonical_path() {
> +  typeset newfile
> +  typeset -A seen
> +
> +  REPLY=$1
> +  # Guard against loops.
> +  while [[ -z ${seen[$REPLY]} ]]; do
> +    seen[$REPLY]=1
> +    newfile=$(zstat +link $REPLY 2>/dev/null)
> +    if [[ -n $newfile ]]; then
> +      REPLY=$newfile
> +    else
> +      break
> +    fi
> +  done
> +}
> +
> +
>  if (( $__opts[(I)-N] )); then
>    files=($@)
>  else
>    for __index in $@; do
> -    files+=$(readlink -qf $__index)
> +    _canonical_paths_get_canonical_path $__index
> +    files+=($REPLY)
>    done
>  fi
>
> @@ -48,13 +68,16 @@
>    expref=${~origpref}
>    [[ $origpref == (|*/). ]] && rltrim=.
>    curpref=${${expref%$rltrim}:-./}
> -  canpref=$(readlink -qf $curpref)
> -  if [[ $? -eq 0 ]]; then
> -    [[ $curpref == */ && $canpref == *[^/] ]] && canpref+=/
> -    canpref+=$rltrim
> -    [[ $expref == *[^/] && $canpref == */ ]] && origpref+=/
> -    matches+=(${${(M)files:#$canpref*}/$canpref/$origpref})
> +  if zstat $curpref >&/dev/null; then
> +    _canonical_paths_get_canonical_path $curpref
> +    canpref=$REPLY
> +  else
> +    canpref=$curpref
>    fi
> +  [[ $curpref == */ && $canpref == *[^/] ]] && canpref+=/
> +  canpref+=$rltrim
> +  [[ $expref == *[^/] && $canpref == */ ]] && origpref+=/
> +  matches+=(${${(M)files:#$canpref*}/$canpref/$origpref})
>    for subdir in $expref?*(@); do
>      _canonical_paths_add_paths ${subdir/$expref/$origpref} add
>    done
>
>
> --
> Peter Stephenson <pws@csr.com>                  Software Engineer
> CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
> Cambridge, CB4 0WZ, UK                          Tel: +44 (0)1223 692070
>

Wonderful, this one works great on FreeBSD, hope it will be ok for others.

Thanks.
Baptiste.

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