GitLab

TODO

Part 1: make some calculations

• create a merge request from this issue
• open the WebIDE
• update the .gitlab-ci.yml file
• Deactivate the existing jobs by prefixing each job name by a .: hello becomes .hello
• Create a new stage calculator
• Create a new job addition belonging to calculator with:
  • 2 variables x and y
  • a script that adds x and y and displays the result
• commit your changes, it will trigger the pipeline
• observe the pipeline
• observe the output of the pipeline
• don't merge on master

Part 2: create a bash function

• update the .gitlab-ci.yml file
• write a bash function to use it in your CI script (🖐️ see the § Help, third point):
  • create a YAML anchor and add to it an add function that calculates the addition of 2 parameters $1 and $2
  • use it in your addition job, like this: add $x $y
• commit your changes, it will trigger the pipeline
• observe the pipeline
• observe the output of the pipeline
• merge on master (the pipe will be triggered again)

Help

• To perform an arithmetic expression with bash, use this notation: $((expression))
• To write a script in a multiline string (without the -at every line) you can use the |(pipe) notation:

  my-little-job:
    stage: my-stage
    tags: [docker]
    script: |
      echo "hello 1"
      echo "hello 2"
      echo "hello 3"

• Use YAML anchors to define reusable functions:

  .tools: &tools |
    function hello() {
      echo "Hello $1" # $1 is the first argument of the function
    }
  
  my-little-job:
    stage: my-stage
    tags: [docker]
    before_script:
      - *tools
    script: |
      hello Bob # output: "Hello Bob"