main.nim

import myutils

proc preRun(): int =
  #...sets up the environment with globals and whatnot...
  discard

proc initHandler(idx: int, vargs: seq[string], env: HandleEnvironment): int {.gcsafe.} =
  #...code stuff...
  discard
  
# all procs in the table are the same as initHandler

var
  commands = toTable({
    "init": initHandler,
    "build": buildHandler,
    "integration": integrationHandler,
    "help": helpHandler,
    "hotswap": hotswapHandler,
    "log": logHandler,
    "search": searchHandler,
    # Temporary handler for testing various bits and bobs
    "test": testHandler
  })
  idx = 0
  params = commandLineParams()
  param: string
  environment: HandleEnvironment
allCommands = toSet(toSeq(commands.keys()))
environment = HandleEnvironment(
  branch: branch,
  workingDir: workingDir,
  branchlessWorkingDir: branchlessWorkingDir,
  storagePath: storagePath,
  allCommands: allCommands)
  
idx += preRun(params)

if params.len() == 0:
  printHelp()
  quit(1)
else:
  while idx < params.len():
    param = params[idx]
    if commands.hasKey(param):
      idx += commands[param](idx, params, environment) + 1
    else:
      echo "'", param, "' is not a valid command."
      printHelp()
      quit(1)

myutils.nim

type
  HandleEnvironment* = ref object
    branch*: string
    workingDir*: string
    branchlessWorkingDir*: string
    storagePath*: string
    allCommands*: HashSet[string]
    
# ...and other useful stuff

searchmodule.nim

import myutils


proc searchHandler*(idx: int, vargs: seq[string], env: HandleEnvironment): int {.procvar, gcsafe.} =
  discard