Generate multiple output files with cog

[karolzlot]

Is it possible to generate multiple output files with cog?

For example I have python dictionary:

MODULE_ACTIONS_DICT = {
"contractors": ["add", "delete", "edit", "find", "get"],
"invoices": ["add", "delete", "download", "edit", "find"],
"expenses": ["find","get"],
........
}

I would like to use cog to create multiple source files, one file per dictionary key and using dictionary values to parametrize those files.

I wonder if cog is right tool for this task... Alternatively I can use jinja2

[nedbat]

Hi, sorry I didn't get to this. Cog doesn't have a way to do this now, but I might be adding an explicit API to cog, which would make this possible. Did you find another way to do it?

[dreftymac]

using-cog-from-within-python

Overview

• using cog from within python

Context

• nedbat cog for python
• most recent stable version as of 2023-03-11

Scenario

• developer karolzlot wants to
  • invoke cog from the cmd_line
  • use cog to create multiple source files
  • one file per dictionary key and using dictionary values to parametrize those files

Problem

• as of this writing, this option is not available from the cmd_line
• Solution -- run cog from within python

Solution

• using cog from within python
• cog can be invoked from within a python program
• this approach supports any workflow you want to use
• (eg) use cog + cookiecutter + jinja2 for arbitrary workflows

Example

• the following code excerpt shows how to initialize and run cog inside a python program
• you could wrap this code inside a function or a classmethod and pass in the input file as a parameter
• alternatively call the function and pass in the entire config dictionary as an argument

    import cogapp
    cogscript = cogapp.Cog()
    pass

    ddcogginfo = dict()
    ddcogginfo['prelines']  = 'import random;'
    ddcogginfo['fileinpp']  = 'QXP:/path/to/my/file/friantexport.java'
    ddcogginfo['outname']   = 'friantexport_new.java'
    ddcogginfo['markers']   = '[[cog ]] [[end]]' ## (using the default cog_markup_syntax)
    bbselfreplace   = True
    pass

    aacoggopts  = list()
    aacoggopts +=  [ 'cog' ]                                      ## specify cog
    aacoggopts +=  [ '-nutf-8' ]                                  ## specify utf-8
    aacoggopts +=  [ '--markers={markers}'.format(**ddcogginfo) ] ## specify cog delimiter syntax
    aacoggopts +=  [ '-p{prelines}'.format(**ddcogginfo) ]        ## prepend_generator_source
    if(bbselfreplace):
      aacoggopts +=  [ '-r' ]                                     ## self-replace file content
      pass
    elif(True):
      aacoggopts +=  [ '-o{outname}'.format(**ddcogginfo) ]       ## specify outputfile separate from cog_input_file
    pass
    aacoggopts +=  [ '--verbosity=2' ]                            ## 2verbose 1quiet 0silent
    aacoggopts +=  [ ddcogginfo['fileinpp'] ]                     ## specify cog_input_file
    pass

    vg3557flesoutt = cogscript.main(aacoggopts)
    pass