On Mon, Nov 25, 2019 at 10:04:11PM +0000, Teodoro Santoni wrote:
> Hi marc!
hi Teodoro! thanks for replying.
> I forgot, then remembered this old trick from the Rc paper, by Tom Duff [1]:
> [1]: http://doc.cat-v.org/plan_9/4th_edition/papers/rc
shame on me: this page is actually open in my browser and i didn't get
the trick. on the other end: i indeed was missing something :)
> % ifs='
> '
> % pages=`{ls *.md | sed 's/\.md$/.html/g'}
> Simply set ifs to the newline during the expansion of your files and
> you're done.
cool.. i mixed it with another rc goodness: it's really easy to
localize a variable to a block so you don't touch the global copy
foo=a
foo=b { echo $foo }
echo $foo
gives b a
also, as rc has no expansion capability, i had to "restream" $sources.
i tried
$sources^'
'
but the space separator is added in front of elements (which is expected
but anoying in this case). so i came to the conclusion i need files to
store the lists.
i got:
store=`{mktemp -d /dev/shm/XXXXX}
ls *.md |tee $store/sources | sed '
s/md$/html/
s,^,pub/,
' > $store/targets
ifs='
' {
sources=(`{cat $store/sources})
targets=(`{cat $store/targets})
}
for (i in `{seq $#sources} ) echo $sources($i) ' => ' $targets($i)
rm $store
i finally gave a try on using fifos but this does't work...
store=`{mktemp -d /dev/shm/XXXXX}
mkfifo $store/^(sources targets)
ifs='
' {
sources=(`{cat $store/sources})
targets=(`{cat $store/targets})
} &
ls *.md |tee $store/sources | sed '
s/md$/html/
s,^,pub/,
' > $store/targets
wait
for (i in `{seq $#sources} ) echo $sources($i) ' => ' $targets($i)
about work: that's the thing i'm supposed to do now so .. thanks for
your help and have a nice day.
regards
marc
