FROM node:12-alpine

LABEL maintainer="Robert Kaussow <mail@thegeeklab.de>" \
    org.label-schema.name="markdownlint-cli" \
    org.label-schema.vcs-url="https://gitea.rknet.org/docker/markdownlint-cli" \
    org.label-schema.vendor="Robert Kaussow" \
    org.label-schema.schema-version="1.0"

ARG BUILD_VERSION
# renovate: datasource=npm depName=markdownlint-cli
ENV MARKDOWNLINT_VERSION="${BUILD_VERSION:-0.23.2}"

ENV FORCE_COLOR=true \
    NPM_CONFIG_LOGLEVEL=error

COPY overlay/ /

RUN MARKDOWNLINT_VERSION="${MARKDOWNLINT_VERSION##v}" && \
    MARKDOWNLINT_MAJOR="${MARKDOWNLINT_VERSION%%.*}" && \
    if [ -z "${MARKDOWNLINT_MAJOR//[0-9]}" ] && [ -n "$MARKDOWNLINT_MAJOR" ]; then \
        echo "Installing markdownlint-cli version '$MARKDOWNLINT_VERSION' ..." && \
        npm install -g markdownlint-cli@"$MARKDOWNLINT_VERSION"; \
    else \
        echo "Installing latest markdownlint-cli ..." && \
        npm install -g markdownlint-cli; \
    fi && \
    rm -rf /var/cache/apk/* && \
    rm -rf /tmp/*

USER root
CMD []
ENTRYPOINT ["/bin/markdownlint-cli"]