extra arguments inserted by glob thinger e:: get sorted afterwards

extra arguments inserted by glob thinger e:: get sorted afterwards

[Mikael Magnusson]

Hi, someone just asked on irc how to give a globbed list of files to a
program with a -f inserted before each argument, so I told him
*(e:'reply=(-f $REPLY)':), that doesn't work however, as the arguments
are resorted afterwards, which seems like the less useful way to do
it. Of course one can add oN, but it would be nicer if you could both
sort files and add extra arguments. Stuff like oa doesn't make sense
on the inserted arguments anyway.

% print -- *.sh(oNe:'reply=(-f $REPLY)':)
-f zmpc.sh -f ifs.sh -f test.sh -f script_pandora.sh
% print -- *.sh(e:'reply=(-f $REPLY)':)
-f -f -f -f ifs.sh script_pandora.sh test.sh zmpc.sh

-- 
Mikael Magnusson

Re: extra arguments inserted by glob thinger e:: get sorted afterwards

[Peter Stephenson]

Mikael Magnusson wrote:
> Hi, someone just asked on irc how to give a globbed list of files to a
> program with a -f inserted before each argument, so I told him
> *(e:'reply=(-f $REPLY)':), that doesn't work however, as the arguments
> are resorted afterwards, which seems like the less useful way to do
> it.

It's the *only* way to do it.  The arguments are all assumed to be
files, which is after all the point of globbing.  Either you get them
sorted as files or you don't get them sorted.

-- 
Peter Stephenson <pws@csr.com>            Software Engineer
Tel: +44 (0)1223 692070                   Cambridge Silicon Radio Limited
Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, UK


Member of the CSR plc group of companies. CSR plc registered in England and Wales, registered number 4187346, registered office Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom

Re: extra arguments inserted by glob thinger e:: get sorted afterwards

[Bart Schaefer]

On Feb 5,  3:49pm, Peter Stephenson wrote:
}
} Mikael Magnusson wrote:
} > Hi, someone just asked on irc how to give a globbed list of files to a
} > program with a -f inserted before each argument, so I told him
} > *(e:'reply=(-f $REPLY)':), that doesn't work however, as the arguments
} > are resorted afterwards, which seems like the less useful way to do
} > it.
} 
} It's the *only* way to do it.  The arguments are all assumed to be
} files, which is after all the point of globbing.  Either you get them
} sorted as files or you don't get them sorted.

I suppose what Mikael would like is for "-f $REPLY" to be glob-sorted
as a unit, but still word-split at parse time.  Breaks if the actual
file name has spaces.

The manual sort of implies that *(e.'reply+="-f $REPLY"'.:x) should be
the way to do this -- glob first, then split the result into words at
whitespace after; the doc says only that :x doesn't work for parameters,
failing to mention that it doesn't work for globbing either.  However,
there's an equally good argument that the :x would apply before sorting,
if it worked at all.

Re: extra arguments inserted by glob thinger e:: get sorted afterwards

[Jörg Sommer]

Hello Mikael,

Mikael Magnusson <mikachu@gmail.com> wrote:
> Hi, someone just asked on irc how to give a globbed list of files to a
> program with a -f inserted before each argument, so I told him
> *(e:'reply=(-f $REPLY)':), that doesn't work however, as the arguments
> are resorted afterwards, which seems like the less useful way to do
> it. Of course one can add oN, but it would be nicer if you could both
> sort files and add extra arguments. Stuff like oa doesn't make sense
> on the inserted arguments anyway.
>
> % print -- *.sh(oNe:'reply=(-f $REPLY)':)
> -f zmpc.sh -f ifs.sh -f test.sh -f script_pandora.sh

Why not use $^?

% print -- -f\ ${(f)^"$(print -l /bin/ls*)"}
-f /bin/ls -f /bin/lsmod

Bye, Jörg.
-- 
> Definiere ‚Demokratie‘ …
… eine Mehrheit beweist einer Minderheit, dass Widerstand zwecklos ist.

Re: extra arguments inserted by glob thinger e:: get sorted afterwards

[Frank Terbeck]

Jörg Sommer wrote:
[...]
>> % print -- *.sh(oNe:'reply=(-f $REPLY)':)
>> -f zmpc.sh -f ifs.sh -f test.sh -f script_pandora.sh
>
> Why not use $^?
>
> % print -- -f\ ${(f)^"$(print -l /bin/ls*)"}
> -f /bin/ls -f /bin/lsmod

Because:
% print -l -- -f\ ${(f)^"$(print -l /bin/ls*)"}
-f /bin/ls
-f /bin/lsmod

"-f /bin/ls" would be one word to the shell.

Regards, Frank

-- 
In protocol design, perfection has been reached not when there is
nothing left to add, but when there is nothing left to take away.
                                                  -- RFC 1925

Re: extra arguments inserted by glob thinger e:: get sorted afterwards

[Mikael Magnusson]

On 8 February 2010 13:44, Frank Terbeck <ft@bewatermyfriend.org> wrote:
> Jörg Sommer wrote:
> [...]
>>> % print -- *.sh(oNe:'reply=(-f $REPLY)':)
>>> -f zmpc.sh -f ifs.sh -f test.sh -f script_pandora.sh
>>
>> Why not use $^?
>>
>> % print -- -f\ ${(f)^"$(print -l /bin/ls*)"}
>> -f /bin/ls -f /bin/lsmod
>
> Because:
> % print -l -- -f\ ${(f)^"$(print -l /bin/ls*)"}
> -f /bin/ls
> -f /bin/lsmod
>
> "-f /bin/ls" would be one word to the shell.

And also because:
# touch /bin/ls'
fail'
% print -- -f\ ${(f)^"$(print -l /bin/ls*)"}
-f /bin/ls
-f /bin/ls
-f fail
-f /bin/lsmod

$() is almost impossible to get right wrt quoting.
print -l -- -f\ ${(0)^"$(printf '%s\0' /bin/ls*)"} probably works a
bit better, but of course it's still useless since the -f is not a
separate parameter.

As an aside, is "$(echo a b c)" the only way to get an 'inline' array
in a ${} expression? I sometimes want to use a glob qualifier on a
middle part of a path but then I need to use temp arrays (and I'd
rather not use $() there).

-- 
Mikael Magnusson

Re: extra arguments inserted by glob thinger e:: get sorted afterwards

[Bart Schaefer]

On Feb 8,  6:16pm, Mikael Magnusson wrote:
}
} As an aside, is "$(echo a b c)" the only way to get an 'inline' array
} in a ${} expression?

The most obvious is ${=:-one two three} which applies word splitting
to the string to the right of the hyphen.  Interestingly this even
works with quoting, where I had assumed it would break within words:

zsh% print -l ${=:-"one two" three\ four 'five six'}
one two
three four
five six

And you can combine it with rcexpandparam:

zsh% print -l X${^=:-"one two" three\ four 'five six'}Z
Xone twoZ
Xthree fourZ
Xfive sixZ


-- 

Re: extra arguments inserted by glob thinger e:: get sorted afterwards

[Peter Stephenson]

Bart Schaefer wrote:
> The most obvious is ${=:-one two three} which applies word splitting
> to the string to the right of the hyphen.  Interestingly this even
> works with quoting, where I had assumed it would break within words:

This was part of the set of changes Wayne made to parameter substitution
for quoting which I see is already four years old, Src/subst.c revisions
1.45 to 1.49.

-- 
Peter Stephenson <pws@csr.com>            Software Engineer
Tel: +44 (0)1223 692070                   Cambridge Silicon Radio Limited
Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, UK


Member of the CSR plc group of companies. CSR plc registered in England and Wales, registered number 4187346, registered office Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom