To install the Magnento 2 Import Framework, composer is necessary. The framework itself is a set of components that provide import functionality for Magento 2. This repository, based on Symfony Console, uses the the package M2IF and provides a command line tool with import functionality for Magento 2 standard CSV files.
The following description assumes that the target system for the import is Magento 2.3.x that is supported by the M2IF 3.x versions. For Magento 2.2.x M2IF version 2.2.x HAS to be used.