func parseArgsForParams()

in cmd/utils.go [66:114]
33 lines of code
8 McCabe index (conditional complexity)

func parseArgsForParams(args []string) ([]string, []string, error) {
	var paramArgs []string
	var err error

	i := 0

	// iterate over the list of input arguments
	// append key value pair of --param <parameter name> <parameter value> as a string
	// in case of --param-file, read parameter file, append each JSON "key: value" pair as a string
	for i < len(args) {
		// when arg is -P or --param-file, open and read the specified JSON file
		if args[i] == SHORT_CMD+FLAG_PARAMFILE_SHORT || args[i] == LONG_CMD+FLAG_PARAMFILE {
			// Command line parser library Cobra, assigns value of --param-file to utils.Flags.ParamFile
			// but at this point of execution, we still don't have utils.Flags.ParamFile assigned any value
			// and that's the reason, we have to explicitly parse the argument list to get the file name
			paramArgs, args, err = getValueFromArgs(args, i, paramArgs)
			if err != nil {
				return nil, nil, err
			}
			filename := paramArgs[len(paramArgs)-1]
			// drop the argument (--param-file) and its value from the argument list after retrieving filename
			// read file content as a single string and append it to the list of params
			file, readErr := ioutil.ReadFile(filename)
			if readErr != nil {
				err = wskderrors.NewCommandError(FLAG_PARAMFILE+"/"+FLAG_PARAMFILE_SHORT,
					wski18n.T(wski18n.ID_ERR_INVALID_PARAM_FILE_X_file_X,
						map[string]interface{}{
							wski18n.KEY_PATH: filename,
							wski18n.KEY_ARG:  FLAG_PARAMFILE + "/" + FLAG_PARAMFILE_SHORT,
							wski18n.KEY_ERR:  readErr}))
				return nil, nil, err
			}
			paramArgs[len(paramArgs)-1] = string(file)
			// --param can appear multiple times in a single invocation of whisk deploy
			// for example, wskdeploy -m manifest.yaml --param key1 value1 --param key2 value2
			// parse key value map for each --param from the argument list
			// drop each --param and key value map from the argument list after reading the map
			// append key value as a string to the list of params
		} else if args[i] == LONG_CMD+FLAG_PARAM {
			paramArgs, args, err = getKeyValueArgs(args, i, paramArgs)
			if err != nil {
				return nil, nil, err
			}
		} else {
			i++
		}
	}
	return args, paramArgs, nil
}