How to determine the startup parameters of a pipeline when editing specific resources in Git?

Using CI/CD triggers linked to changes in specific files or directories.

For example, in GitLab CI:

# .gitlab-ci.yml

stages:
  - build
  - test

build_job:
  stage: build
  script:
    - echo "Building application..."
  # Run pipeline only when files in the app/ directory change
  only:
    changes:
      - app/**/*

test_job:
  stage: test
  script:
    - echo "Running tests..."
  # Run this stage only when tests in the test/ directory change
  only:
    changes:
      - test/**/*

Maven in Jenkinsfile using the triggers directive:

// Jenkinsfile (Declarative Pipeline)

pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                echo 'Building...'
            }
        }
        stage('Test') {
            steps {
                echo 'Testing...'
            }
        }
    }
    // Trigger on changes in a specific directory (requires SCM API and Job DSL plugin)
    // Example for Git with Poll SCM trigger
    triggers {
        pollSCM('H * * * *') // Poll every minute
    }
    options {
        skipChanges() // Skip triggers if there are no changes
    }
}

Using GitHub Actions:

# .github/workflows/ci.yml

name: CI Pipeline

on:
  push:
    # Run on changes in specific paths
    paths:
      - 'src/**'
      - 'tests/**'
      - '!docs/**' # Ignore changes in docs/ directory

jobs:
  build-and-test:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
      - name: Build
        run: echo "Building..."
      - name: Test
        run: echo "Testing..."

This allows running only the necessary parts of the pipeline or the entire pipeline, saving computational resources and time. The exact syntax and capabilities depend on the specific CI/CD system.