The "ci" folder consists of-

build.sh --> builds rpm packages (if -p package option is  passed as "centos"
or in default case) by calling build_rpm subfolder files ; builds debian
packages (if -p package option is  passed as "ubuntu") by calling build_deb
subfolder files; builds both debian and rpm packages (if -p package option is
passed as "both").

build_deb --> contains the files required to build debian backages for kernel
and qemu, inside ubuntu docker.

build_rpm --> contains the files required to build rpm backages for kernel and
qemu, inside centos docker.

envs --> contains the host and guest setup+configuration files.


The actual Tree structure is as below-

|-- build_deb
|   |-- build_debs_docker.sh
|   |-- build_debs.sh
|   |-- Dockerfile
|   |-- kernel_deb_build.sh
|   |-- mkcontrol.sh
|   `-- qemu_deb_build.sh
|-- build_rpm
|   |-- build_rpms_docker.sh
|   |-- build_rpms.sh
|   |-- Dockerfile
|   |-- kernel_rpm_build.sh
|   |-- mkspec
|   |-- mkversion
|   |-- qemu_rpm_build.sh
|-- build.sh
|-- envs
|   |-- create-rt-tests-rpm.sh
|   |-- guest-cmd.sh
|   |-- guest-modify.sh
|   |-- guest-setup0.sh
|   |-- guest-setup1.sh
|   |-- host-config
|   |-- host-run-qemu.sh
|   |-- host-setup0.sh
|   |-- host-setup1.sh
|   `-- rt-tests.patch
`-- README