[ShimShtein]

Why are you introducing these changes? (Problem description, related links)

Currently the packit builds are useless in the containerized world, since the container is not built based on the PRs.

What are the changes introduced in this pull request?

• Created a Containerfile that installs packit repo and all the rpms from it on top of the base container
• Created a script apply_pr.py that wraps the container creation process and enables generation of the container.

How to test this pull request

Steps to reproduce:

• Pick a PR, invoke the script
• foremanctl deploy
• Observe the foreman instance with the PR applied

Checklist

• Tests added/updated (if applicable)
• Documentation updated (if applicable)

[coderabbitai]

📝 Walkthrough

Adds a Containerfile that installs packages from a selected Packit repository and a script that builds the image, then loads it into root’s Podman image store.

Changes: Packit PR image workflow

Layer / File(s)	Summary
Configure and build the Packit image development/packit/apply_pr.py, development/packit/Containerfile	The script accepts a base image, repository, and PR number. It inspects the base image user and builds the image with those values. The Containerfile installs the DNF COPR command, enables the selected Packit repository for rhel-10-x86_64, upgrades packages, cleans DNF metadata, and switches to the configured user.
Load the image and return command status development/packit/apply_pr.py	The script pipes the saved image into sudo podman load. It returns subprocess failure codes and reports other OS errors to stderr with status 1.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant apply_pr.py
  participant Podman
  participant Containerfile
  participant sudo_Podman
  apply_pr.py->>Podman: Inspect base image user
  apply_pr.py->>Podman: Pull base image and retry inspection when needed
  apply_pr.py->>Podman: Build image with Containerfile and build arguments
  Podman->>Containerfile: Execute build instructions
  Containerfile-->>Podman: Provide configured image
  apply_pr.py->>Podman: Save built image to stdout
  apply_pr.py->>sudo_Podman: Pipe image stream to load

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Merge Risk: 🟡 Moderate · up to 33fbf

Successive PR builds can include packages from an earlier PR, making the deployed image unreliable for testing. Ensure each build starts from a clean base before merging.

Pre-merge checks · 4 · 1

Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 40.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 1 files. (1 skipped: 1…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks (4 passed)

Check name	Status	Explanation
Title check		The title clearly and concisely describes the main change: building a container from Packit pull request RPMs.
Description check		The description directly explains the problem, the new Containerfile and apply_pr.py script, and the intended testing procedure.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 40.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 1 files. (1 skipped: 1 unsupported.)

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✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Commit to this branch
• Create a new PR

[coderabbitai]

Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at @development/packit/apply_pr.py:
- Line 59: Update the podman build invocation that uses args.base_image to
always pull its FROM image before building, while keeping the existing output
tag unchanged.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: Repository UI
• Review profile: CHILL
• Plan: Advanced
• Run ID: 74a832bc-98e4-4b79-bb2b-6c2345b41bc5

📥 Commits

Reviewing files that changed from the base of the PR and between 47b8fa4 and 33fbfa0.

📒 Files selected for processing (2)

• development/packit/Containerfile
• development/packit/apply_pr.py

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[adamruzicka]

Would it be possible to put in multiple packit-built rpms from different repositories at the same time? Or would users be expected to "chain" this, building a couple of intermediate images in the process?

[ShimShtein]

For now I have created the process to chain the builds. I suppose if we do something more complicated, we can also do it in a single step.
Edit: It will require parsing arrays inside the RUN statement in the Containerfile. I think it can become a bit messy. What is your concern with stacking the PRs one on top the other?

[ehelms]

Since this isn't in draft, I assume this is not a PoC, in which case can you modify this to follow our forge paradigm?

[ShimShtein]

can you modify this to follow our forge paradigm?

Forge is not available on the CI machines that will need to run it. The idea is to use the "production-like" setup, which means installing foremanctl from the repos, and there is no forge there.

[nacoool]

Can we have option to add multiple PRs of multiple Repo

[adamruzicka]

No, not really. Not until we have source-based containers.

The old workaround still remains - open a dummy PR which includes all the changes you want to test together and let packit build an rpm out of that.

Eh sorry, I somehow skipped the "of multiple repo" part. Multiple PRs of multiple repos seem to be doable, see #934 (review) and #934 (comment)

[ShimShtein]

Yes, just run the process multiple times - it will build the containers one on top the other.

Let's start with the minimal setup, and get it in. We can add a json option and a loop to the script later.

[nacoool]

Test Ack: Tested and it works as expected:

napathak@napathak-thinkpadt14gen5:~/foremanctl/foremanctl$ ./development/packit/apply_pr.py --repo-name hammer-cli-foreman-google --pr 19
napathak@napathak-thinkpadt14gen5:~/foremanctl/foremanctl$ source .venv/bin/activate
(.venv) napathak@napathak-thinkpadt14gen5:~/foremanctl/foremanctl$ ./foremanctl deploy --initial-admin-username=admin  --initial-admin-password=changeme --tuning development
[vagrant@quadlet ~]$ rpm -qa | grep -i "google"
rubygem-hammer_cli_foreman_google-1.1.3-2.20261009104314214558.pr19.2.g44496f2.el10.noarch
rubygem-hammer_cli_foreman_google-doc-1.1.3-2.20261009104314214558.pr19.2.g44496f2.el10.noarch

Works as expected

[ehelms]

I am missing from this what the workflows or use cases are on how this script should be used. How would CI use this? How would an contributor use this? Do I run it locally? Adding documentation would help.

[ShimShtein]

Adding documentation would help.

Once we agree on the implementation I will add proper documentation, sure!

As for the use cases: I think the main goal of this is testing a PR. I can see a couple of possible use cases:

1. Testing in local environment, without a local container: a user creates an empty box, copies the script source to the empty box, runs the script, runs foremanctl.
2. Testing in local environment, with a local container: a user downloads the script locally, the user runs the script and generates a local container, creates an empty box, copies the container to the box, runs foremanctl.
3. CI (automated) testing: the user triggers a CI process, the CI creates a controller box, the CI then creates the foremanctl (it may be also the controller, then no need for a second machine here) box, the CI copies the script to the foremanctl box, the CI runs the script on the foremanctl box, the CI invokes foremanctl on the foremanctl box.

I think those are the scenarios I could think of.
I think all the scenarios that are mentioned here would not install foremanctl from source, so forge would not be available (at least in the current design).