qm/docs/devel/README.developer.md

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# Developers documentation
## Building QM rpm manually with changes
Building QM locally with changes for tests is a recommended practice,
especially for testing new features before submitting a pull request.
**1.** Prerequisite
```bash
dnf install -y rpm-build golang-github-cpuguy83-md2man selinux-policy-devel
```
**2.** Clone the repo
```bash
git clone https://github.com/containers/qm.git && cd qm
```
**3.** Build the RPM
Select a QM version that is a higher number from the current one.
For example, if today's QM version is 0.6.2, set it to 1.0 so that
the RPM created is identifiable as yours.
```bash
make clean && VERSION=1.0 make rpm
```
The rpm is created at the `${RPM_TOPDIR}/RPMS` folder, by default
`${PWD}/rpmbuild/RPMS`.
You can export **RPM_TOPDIR** to change the path where the rpm will be placed.
For example:
```bash
VERSION=1.0 RPM_TOPDIR=/USER/rpmbuild make rpm
```
## Building CentOS AutoSD and QM manually
During development, it is common to conduct integration tests to ensure your
changes work well with other components within the overall solution.
In our case, it's best to test against the CentOS Automotive Stream
Distribution (AutoSD) image.
Once you have the new [RPM](#building-qm-rpm-manually-with-changes), follow these steps:
**1.** Make sure the new rpm is located in **/USER/rpmbuild/RPMS/**
Example
```bash
ls /root/rpmbuild/RPMS/noarch/qm-1.0-1.noarch.rpm
/root/rpmbuild/RPMS/noarch/qm-1.0-1.noarch.rpm
```
**2.** Download additional packages required by the image
```bash
sudo dnf download --destdir /root/rpmbuild/RPMS/noarch/ selinux-policy selinux-policy-any
```
**3.** Create a local repository with the new package
```bash
dnf install createrepo_c -y
cd /root/rpmbuild/RPMS/noarch/
createrepo .
```
**4.** Clone the CentOS Automotive distro for the build
Ensure you meet the requirements for the CentOS Automotive Stream by
referring to [this link](https://sigs.centos.org/automotive/building/).
The following commands will execute:
- Install the podman package
- Clone the sample-images repository and required submodules (automotive-image-builder)
- Cleanups before a fresh build
- Finally creates a new qcow2 image (BASED ON distro name, mode (ostree or regular) and uses the qemu-qm-container sample image)
NOTE:
- The path for the new QM rpm file (/root/rpmbuild/RPMS/noarch)
- extra_rpms - useful for debug.
- ssh enabled
The command below utilises automotive-image-builder to produce a `qm-minimal` qcow2 image for cs9,
other example images such as `simple-qm-container` and the `simple-qm`
image can be found in the images directory of the sample-images repository.
```bash
dnf install podman -y && dnf clean all
git clone https://gitlab.com/CentOS/automotive/sample-images.git
git submodule update --init
cd sample-images/
rm -rf _build #Optional, only relevant after initial build
rm -rf *.qcow2 #Optional, only relevant after initial build
./automotive-image-builder/automotive-image-builder build --distro cs9 --mode package --define 'ssh_permit_root_login=true' --define 'ssh_permit_password_auth=true' --define 'extra_repos=[{"id":"local","baseurl":"file:///root/rpmbuild/RPMS/noarch"}]' --define 'extra_rpms=["qm-1.0", "vim-enhanced", "openssh-server", "openssh-clients", "python3", "polkit", "rsync", "strace", "dnf", "gdb"]' --target qemu --export qcow2 images/qm-minimal.mpp.yml cs9-qemu-qm-container.x86_64.qcow2
```
If you would like more information on building automotive images with automotive-image-builder, please see the
[Automotive SIG pages for AutoSD](https://sigs.centos.org/automotive/getting-started/about-automotive-image-builder/)
Run the virtual machine, default user: root, pass: password.
To change default values, use the [defaults.ipp.yml](https://gitlab.com/CentOS/automotive/src/automotive-image-builder/-/blob/main/include/defaults.ipp.yml) file.
```bash
./automotive-image-builder/automotive-image-runner --nographics ./cs9-qemu-qm-container.x86_64.qcow2
```