Creating circuit netlists from a script

[Paul Bodenstab]

I often want to write scripts that just create netlists of various circuits. I
can easily execute the following on the terminal command line to do this:

xschem -q -x -n -s -N test.deck test.sch

All is fine as long as there were no errors found during the netlisting
process. If any errors/warnings were found then these errors are printed to
stderr. If I want to capture these errors then I do the following:

xschem -q -x -n -s -N test.deck test.sch 2>test.err

This is easy enough as long as I do this manually at the command line or in a
bash script but it isn't so easy to do in a scripting language like perl.
Neither of the following constructs work in perl:

xschem -q -x -n -s -N test.deck test.sch 2>test.err

or

system qw/ xschem -q -x -n -s -N /, 'test.deck', 'test.sch', '2>test.err'

The reason is that both perl constructs take only a full command string and the
'2>test.err' is actually part of a command line shell that perl doesn't handle.

Consequently, I am requesting that an additional xschem option to be created
that allows specifying a file that all stderr output is written to:

xschem -q -x -n -s -E test.err -N test.deck test.sch

As far as I know -E in not defined but if it is then another choice can be made.
Having this option makes saving netlisting errors to a file easy in all of the above
scenarios.

Thank you for your consideration.

[stefan]

The -l log command option is meant to put all stderr messages into a file (log in this case). Unfortunately the erc messages after a netlist were written to stderr instead of the specified log file. The last commit fixes this.
Add -l log to your netlist command and all stderr messages go to log

[Paul Bodenstab]

Many thanks Stefan!