add workaround for dnf5 addrepo bug

The addrepo command has a bug that causes it to fail if the `.repo` file
contains empty lines, causing it to fail;

    dnf config-manager addrepo --from-repofile="https://download.docker.com/linux/fedora/docker-ce.repo"
    Error in added repository configuration file. Cannot set repository option "#1=
    ": Option "#1" not found

Use a temporary file and strip empty lines as a workaround until the bug
is fixed.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

install.sh

@@ -558,8 +558,15 @@ do_install() {
 					set -x
 				fi
 				if command_exists dnf5; then
-					$sh_c "dnf -y -q --setopt=install_weak_deps=False install dnf-plugins-core"
-					$sh_c	"dnf5 config-manager addrepo --save-filename=docker-ce.repo --from-repofile='$repo_file_url'"
+					# $sh_c "dnf -y -q --setopt=install_weak_deps=False install dnf-plugins-core"
+					# $sh_c	"dnf5 config-manager addrepo --save-filename=docker-ce.repo --from-repofile='$repo_file_url'"
+
+					$sh_c "dnf -y -q --setopt=install_weak_deps=False install curl dnf-plugins-core"
+					# FIXME(thaJeztah); strip empty lines as workaround for https://github.com/rpm-software-management/dnf5/issues/1603
+					TMP_REPO_FILE="$(mktemp --dry-run)"
+					$sh_c "curl -fsSL '$repo_file_url' | tr -s '\n' > '${TMP_REPO_FILE}'"
+					$sh_c "dnf5 config-manager addrepo --save-filename=docker-ce.repo --overwrite --from-repofile='${TMP_REPO_FILE}'"
+					$sh_c "rm -f '${TMP_REPO_FILE}'"
 
 					if [ "$CHANNEL" != "stable" ]; then
 						$sh_c "dnf5 config-manager setopt 'docker-ce-*.enabled=0'"