Dockerfile

FROM php:7.3-cli
MAINTAINER Chris Jean <chris@chrisjean.com>

RUN DEBIAN_FRONTEND=noninteractive apt-get update
RUN DEBIAN_FRONTEND=noninteractive apt-get upgrade -y
RUN DEBIAN_FRONTEND=noninteractive apt-get install -y git
RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

RUN echo "date.timezone = UTC" >> /usr/local/etc/php/php.ini
RUN echo "memory_limit = -1" >> /usr/local/etc/php/php.ini
RUN echo "phar.readonly = 0" >> /usr/local/etc/php/php.ini

RUN pear install PHP_CodeSniffer
RUN git clone https://github.com/wimg/PHPCompatibility.git /usr/local/lib/php/PHP/CodeSniffer/Standards/PHPCompatibility
RUN phpcs --config-set installed_paths /usr/local/lib/php/PHP/CodeSniffer/Standards/PHPCompatibility

RUN mkdir /project
VOLUME ["/project"]
WORKDIR "/project"

ENV versions "5.2-"
ENV report ""

CMD phpcs --standard=PHPCompatibility --runtime-set testVersion $versions $report .