Episodes

What is CI/CD? Continuous Integration (CI), and Continuous Deployment (CD) are two related concepts in the field of DevOps, a sub-domain of software engineering.

As we enter the first episode of the Continuous Integration / Continuous Deployment (CI/CD) session, we learn how to exit. Exit codes communicate the outcome of a script with (in this case) the CI/CD pipeline. We …

This is a relatively short section, but we need to connect some things you’ve learned from testing in Python with exit codes. Assert Your Tests An assertion is a sanity-check carried out by the assert statement, useful …

YAML YAML (YAML Ain’t Markup Language (a recursive acronym), originally standing for Yet Another Markup Language) is a human-readable data-serialization language. It is commonly used for configuration files and in …

GitHub Actions YAML The GitHub Actions configurations are specified using YAML files stored in the.github/workflows/ directory. Here is an example of a YAML file:

Adding CI/CD to a project The first thing we’ll do is create a .github/workflows/main.yml file in the project.

Time To Skim The Naive Attempt As of right now, your .github/workflows/main.yml should look like

Matrix From the previous lesson, we tried to build the code against two different ROOT images by adding an extra job: GitHubGitea jobs: greeting: runs-on: ubuntu-latest steps: - run: echo hello world build_skim: runs-on: …

Defining dependencies From the last session, we’re starting with GitHubGitea jobs: greeting: runs-on: ubuntu-latest steps: - run: echo hello world build_skim: runs-on: ubuntu-latest container: rootproject/root:${{ …

The First Naive Attempt Let’s just attempt to try and get the code working as it is. Since it worked for us already locally, surely the CI/CD must be able to run it?

Challenge Recall GitHubGitea build_skim: needs: greeting runs-on: ubuntu-latest container: rootproject/root:${{ matrix.version }} strategy: matrix: version: [6.26.10-conda, latest] steps: - name: checkout repository …

On Your Own So in order to make plots, we just need to take the skimmed file skim_ggH.root and pass it through the histograms.py code that exists. This can be run with the following code:

So at this point, I’m going to be very hands-off and just explain what you will be doing. Here’s where you should be starting from:

Like the last section, I will simply explain what you need to do. After the previous section, you should have the following in .github/workflows/main.yml: GitHubGitea jobs: build_skim: runs-on: ubuntu-latest container: …

PrerequisitesFor this lesson, you should already be familiar with Docker images. Head over to our training on Docker if you aren’t already! Docker Container for Python Packages Python packages can be installed using a …