InfyOm\Generator\Common\CommandData::getInputFromFileOrJson PHP Method

    private function getInputFromFileOrJson()
    {
        // fieldsFile option will get high priority than json option if both options are passed
        try {
            if ($this->getOption('fieldsFile')) {
                if (file_exists($this->getOption('fieldsFile'))) {
                    $filePath = $this->getOption('fieldsFile');
                } else {
                    $filePath = base_path($this->getOption('fieldsFile'));
                }
                if (!file_exists($filePath)) {
                    $this->commandError('Fields file not found');
                    exit;
                }
                $fileContents = file_get_contents($filePath);
                $jsonData = json_decode($fileContents, true);
                $this->inputFields = array_merge($this->inputFields, GeneratorFieldsInputUtil::validateFieldsFile($jsonData));
            } else {
                $fileContents = $this->getOption('jsonFromGUI');
                $jsonData = json_decode($fileContents, true);
                $this->inputFields = array_merge($this->inputFields, GeneratorFieldsInputUtil::validateFieldsFile($jsonData['fields']));
                $this->config->overrideOptionsFromJsonFile($jsonData);
                if (isset($jsonData['migrate'])) {
                    $this->config->forceMigrate = $jsonData['migrate'];
                }
            }
            $this->checkForDiffPrimaryKey();
        } catch (Exception $e) {
            $this->commandError($e->getMessage());
            exit;
        }
    }