Dockerfile for building cnvgrib, w3lib and g2lib RPM packages for CentOS 8

Dockerfile

FROM centos:8

RUN mkdir -p /build

RUN dnf -y --nogpgcheck install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm wget curl zip unzip bzip2 gcc gcc-c++ rpm-build make libpng-devel

RUN dnf -y --nogpgcheck --enablerepo=PowerTools install gcc-gfortran jasper-devel

# SuSE SRPM, get it e.g. from ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/home%3A/gbvalor/SLE_11/src/cnvgrib-1.4.0-1.1.src.rpm
COPY cnvgrib-1.4.0-1.1.src.rpm /build

RUN cd /build && \
    mkdir cnvgrib-1.4.0-1.1 && cd cnvgrib-1.4.0-1.1 && \
    rpm2cpio ../cnvgrib-1.4.0-1.1.src.rpm | cpio -civ * && \
    mkdir -p /root/rpmbuild/{BUILD,BUILDROOT,RPMS,SOURCES,SPECS,SRPMS} && \
    mv cnvgrib_w3lib_g2lib-1.4.0.tar.bz2 /root/rpmbuild/SOURCES && \
    # Due to an idiotic typo in the Makefile templates
    sed -i -e "s/make/sed -i \"s\/unclude\/include\/g\" g2lib\/Makefile.\*\nmake/g" cnvgrib.spec && \
    # To remove any reference to the inmem struct member which has apparently been removed from later libjasper versions
    # See https://github.com/cloudruninc/wps/issues/5 for additional info
    sed -i -e 's#make#sed -i -e "s\/.*inmem.*//g" g2lib\/dec_jpeg2000.c\nmake#g' cnvgrib.spec && \
    sed -i -e 's#make#sed -i -e "s\/.*image\.inmem.*\//g" g2lib\/enc_jpeg2000.c\nmake#g' cnvgrib.spec && \
    # Optional (somewhat cosmetic) line, to make rpmbuild include the designated distro ID (e.g. el8) in the resulting filenames as well
    sed -i 's/Release:	1.1/Release:	1.1\%\{\?dist\}/g' cnvgrib.spec && \
    rpmbuild -ba cnvgrib.spec

# Upon successful completion the resulting image will contain the following files:
# /root/rpmbuild/SRPMS/cnvgrib-1.4.0-1.1.el8.src.rpm
# /root/rpmbuild/RPMS/x86_64/cnvgrib-1.4.0-1.1.el8.x86_64.rpm
# /root/rpmbuild/RPMS/x86_64/w3lib-1.4.0-1.1.el8.x86_64.rpm
# /root/rpmbuild/RPMS/x86_64/g2lib-1.4.0-1.1.el8.x86_64.rpm