Jobs and stages

Jobs and stages

Jobs represent isolated steps in a pipeline

Stages are executed sequentially

Jobs in the same stage are executed in parallel

Described in .gitlab-ci.yml in YAML

Special stages .pre and .post

Job layout

Minimal job:

job_name:
  script:
  - whoami
  - pwd
  - printenv | sort

script is a string and supports all herestring variants of YAML

Testing job scripts

Script blocks can be testing using a container based on alpine:

docker run -it --rm -v $PWD:/src -w /src alpine sh

Example code

Based on Go

See src/main.go

Build command: go build -o hello .

Playground

Use docker to play:

docker run --interactive --tty --rm \
    --volume ${PWD}:/project --workdir /project \
    golang:1.18 bash

Dependency management

Initialize dependency information: go mod init

Update dependency information: go mod tidy

Hands-On

My first CI job

1. Create project
2. Add files from src/ to root of project
3. Add build/.gitlab-ci.yml to root of project
4. Check pipeline

My first stage

1. Add lint/.gitlab-ci.yml to root of project
2. Check pipeline

Parallel jobs

1. Add parallel/.gitlab-ci.yml to root of project
2. Check pipeline