fmf: Download rpms manually instead of going via repositories

This both makes the script more independent, and allows us to add support
for CBS (CentOS Community Build System) at the same time.

test/fmf/integration-tests/main.fmf

@@ -8,3 +8,6 @@ require:
     - distribution-gpg-keys
     - dnf
     - git-core
+    - koji
+    - centos-packager
+    - copr-cli

test/fmf/integration-tests/test.sh

@@ -17,25 +17,25 @@ echo "Clock source: $(cat /sys/devices/system/clocksource/clocksource0/current_c
 sysctl fs.inotify.max_user_watches=65536 || true
 sysctl fs.inotify.max_user_instances=1024 || true
 
-if [[ -n "${PACKIT_TARGET_URL:-}" ]]; then
-    # Prepare systemd source tree
-    git clone "$PACKIT_TARGET_URL" systemd --branch "$PACKIT_TARGET_BRANCH"
-    pushd systemd
-
-    # If we're running in a pull request job, merge the remote branch into the current main
-    if [[ -n "${PACKIT_SOURCE_URL:-}" ]]; then
-        git remote add pr "${PACKIT_SOURCE_URL:?}"
-        git fetch pr "${PACKIT_SOURCE_BRANCH:?}"
-        git merge "pr/$PACKIT_SOURCE_BRANCH"
-    fi
-
-    git log --oneline -5
+if [[ -n "${KOJI_TASK_ID:-}" ]]; then
+    koji download-task --noprogress --arch="src,noarch,$(rpm --eval '%{_arch}')" "$KOJI_TASK_ID"
+elif [[ -n "${CBS_TASK_ID:-}" ]]; then
+    cbs download-task --noprogress --arch="src,noarch,$(rpm --eval '%{_arch}')" "$CBS_TASK_ID"
+elif [[ -n "${PACKIT_SRPM_URL:-}" ]]; then
+    COPR_BUILD_ID="$(basename "$(dirname "$PACKIT_SRPM_URL")")"
+    COPR_CHROOT="$(basename "$(dirname "$(dirname "$PACKIT_BUILD_LOG_URL")")")"
+    copr download-build --rpms --chroot "$COPR_CHROOT" "$COPR_BUILD_ID"
+    mv "$COPR_CHROOT"/* .
 else
-    echo "Not running within packit or Fedora CI"
+    echo "Not running within packit and no CBS/koji task ID provided"
     exit 1
 fi
 
-# Now prepare mkosi, possibly at the same version required by the systemd repo
+mkdir systemd
+rpm2cpio ./systemd-*.src.rpm | cpio --to-stdout --extract './systemd-*.tar.gz' | tar xz --strip-components=1 -C systemd
+pushd systemd
+
+# Now prepare mkosi at the same version required by the systemd repo.
 git clone https://github.com/systemd/mkosi
 mkosi_hash="$(grep systemd/mkosi@ .github/workflows/mkosi.yml | sed "s|.*systemd/mkosi@||g")"
 git -C mkosi checkout "$mkosi_hash"
@@ -47,11 +47,18 @@ export PATH="$PWD/mkosi/bin:$PATH"
 
 tee mkosi.local.conf <<EOF
 [Distribution]
+Distribution=$ID
 Release=${VERSION_ID:-rawhide}
 
+[Content]
+PackageDirectories=..
+SELinuxRelabel=yes
+
 [Build]
 ToolsTreeDistribution=$ID
 ToolsTreeRelease=${VERSION_ID:-rawhide}
+Environment=NO_BUILD=1
+WithTests=yes
 EOF
 
 if [[ -n "${TEST_SELINUX_CHECK_AVCS:-}" ]]; then
@@ -61,32 +68,6 @@ KernelCommandLineExtra=systemd.setenv=TEST_SELINUX_CHECK_AVCS=$TEST_SELINUX_CHEC
 EOF
 fi
 
-if [[ -n "${TESTING_FARM_REQUEST_ID:-}" ]]; then
-    tee --append mkosi.local.conf <<EOF
-[Content]
-SELinuxRelabel=yes
-
-[Build]
-ToolsTreeSandboxTrees=
-        /etc/yum.repos.d/:/etc/yum.repos.d/
-        /var/share/test-artifacts/:/var/share/test-artifacts/
-SandboxTrees=
-        /etc/yum.repos.d/:/etc/yum.repos.d/
-        /var/share/test-artifacts/:/var/share/test-artifacts/
-Environment=NO_BUILD=1
-WithTests=yes
-EOF
-
-    cat /etc/dnf/dnf.conf
-    cat /etc/yum.repos.d/*
-
-    # Ensure packages built for this test have highest priority
-    echo -e "\npriority=1" >> /etc/yum.repos.d/copr_build*
-
-    # Disable mkosi's own repository logic
-    touch /etc/yum.repos.d/mkosi.repo
-fi
-
 # If we don't have KVM, skip running in qemu, as it's too slow. But try to load the module first.
 modprobe kvm || true
 if [[ ! -e /dev/kvm ]]; then