take field names from file

[ggrothendieck]

It would be convenient, particularly if there are a large number of field names, to be able to specify a file that contains them one per line, say. This would also avoid quoting problems, command line length restrictions, etc.

xsv select --fieldfile field.txt myfile.csv

[BurntSushi]

You should be able to just do xsv select -s <(cat field.txt) myfile.csv assuming you're using something like bash or zsh.

[ggrothendieck]

That did not work on WSL/bash when I tried it but in any case it does not help in Windows nor does it address the command line length problem. Biological data can have tens or hundreds of thousands of columns.