I have thousands of two set of files, one with name.ext and another set for the same name ending with name.new.psl. So for every name.ext there is a name.new.psl. Now I have to pass this as arguments to a script such as customise.pl name.ext name.new.psl
Any ideas for a loop in bash? The first name is common for each name.ext and name.new.psl like:
perl customise.pl name.ext name.new.psl
for f in *.ext ; do
perl customise.pl "${f}" "${f/%.txt/.new.psl}"
done
Will do it for you in the current working directory.
% in ${f/%.txt/.new.psl} conflating the ${f%.txt} notation with ${f/.txt/.new}?
% is used to anchor the pattern to the end of the string, similar to the regular expression \.txt$.
for fname in *.ext
do
perl customise.pl "$fname" "${fname%.ext}.new.psl"
done
The above does not require any special bash features. So, it is compatible with, for example, dash which is the default shell (/bin/sh) on debian-derived distributions.
The trick above is that ${fname%.ext} tells the shell to remove the text .ext from the end of $fname, leaving just the "name" part. Thus, "${fname%.ext}.new.psl" removes .ext adds the .new.psl extension.
The file names in the code above are in double-quotes. This is so that this script will work even if the file names have spaces in them.
for i in `ls *.ext`; do NAME=`echo $i | awk -F '.' '{print $1}'`; perl customise.pl $NAME.ext $NAME.new.psl; done
$(ls *.ext) in place of *.ext is definitely seriously inferior. The globbing notation *.ext manages with spaces and other special characters in the file names; the $(ls *.ext) notation breaks on file names containing spaces etc.
for i on $(cmd). See stackoverflow.com/questions/19606864/ffmpeg-in-a-bash-pipe/…