scripts/ci: add configuration for a Vagrant virtual machine

Using Vagrant makes reproducing and debugging CI issues easier: after
"vagrant up", a test virtual machine is up and running, and ready to run
"fedora-test-runner.sh". In order to make using this VM even easier, a
helper script, "run-selinux-test.sh" is created inside and instructions
on how to use it are documented at the beginning of Vagrantfile.

Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>

scripts/ci/.gitignore

@@ -0,0 +1 @@
+.vagrant/

scripts/ci/Vagrantfile

@@ -0,0 +1,48 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+# Vagrant configuration file which creates a virtual machine that can run the
+# test suite using fedora-test-runner.sh, in an environment similar to the one
+# used for automated continuous integration tests (Travis-CI)
+#
+# To create a new virtual machine:
+#
+#    vagrant up --provision
+#
+# To launch tests (for example after modifications to libsepol, libselinux... are made):
+#
+#    vagrant rsync && echo ./run-selinux-test.sh | vagrant ssh
+#
+# To destroy the virtual machine (for example to start again from a clean environment):
+#
+#    vagrant destroy
+
+# Create a helper script in the VM to run the testsuite as root from a clean environment
+$script = <<SCRIPT
+cat > /home/vagrant/run-selinux-test.sh << EOF
+#/bin/sh
+set -e -v
+
+# Run the tests
+sudo /root/selinux/scripts/ci/fedora-test-runner.sh
+echo 'All tests passed :)'
+EOF
+chmod +x /home/vagrant/run-selinux-test.sh
+SCRIPT
+
+# All Vagrant configuration is done below. The "2" in Vagrant.configure
+# configures the configuration version (we support older styles for
+# backwards compatibility). Please don't change it unless you know what
+# you're doing.
+Vagrant.configure("2") do |config|
+  config.vm.box = "fedora/33-cloud-base"
+  config.vm.synced_folder "../..", "/root/selinux"
+
+  config.vm.provider "virtualbox" do |v|
+     v.memory = 4096
+  end
+  config.vm.provider "libvirt" do |v|
+     v.memory = 4096
+  end
+
+  config.vm.provision :shell, inline: $script
+end

scripts/ci/fedora-test-runner.sh

@@ -75,6 +75,7 @@ git log --oneline -1
 #
 # Build and replace userspace components
 #
+make clean distclean
 make -j"$(nproc)" LIBDIR=/usr/lib64 SHLIBDIR=/lib64 install
 make -j"$(nproc)" LIBDIR=/usr/lib64 SHLIBDIR=/lib64 install-pywrap
 make -j"$(nproc)" LIBDIR=/usr/lib64 SHLIBDIR=/lib64 relabel
@@ -84,6 +85,7 @@ make -j"$(nproc)" LIBDIR=/usr/lib64 SHLIBDIR=/lib64 relabel
 # first.
 #
 cd "$HOME"
+rm -rf selinux-testsuite
 git clone --depth=1 https://github.com/SELinuxProject/selinux-testsuite.git
 cd selinux-testsuite