build: Use /etc/os-release rather than hardcoding distro version
So we have one fewer random place to change when bumping Fedora
versions.  Prep for rebasing on F31.
@@ -22,13 +22,13 @@ fi
set -x
srcdir=$(pwd)
-release="30"
-
configure_yum_repos() {
+ local version_id
+ version_id=$(. /etc/os-release && echo ${VERSION_ID})
# Add continuous tag for latest build tools and mark as required so we
# can depend on those latest tools being available in all container
# builds.
- echo -e "[f$release-coreos-continuous]\nenabled=1\nmetadata_expire=1m\nbaseurl=https://kojipkgs.fedoraproject.org/repos-dist/f$release-coreos-continuous/latest/\$basearch/\ngpgcheck=0\nskip_if_unavailable=False\n" > /etc/yum.repos.d/coreos.repo
+ echo -e "[f${version_id}-coreos-continuous]\nenabled=1\nmetadata_expire=1m\nbaseurl=https://kojipkgs.fedoraproject.org/repos-dist/f${version_id}-coreos-continuous/latest/\$basearch/\ngpgcheck=0\nskip_if_unavailable=False\n" > /etc/yum.repos.d/coreos.repo
}
