v2025.12.0

Major Migration: GitLab CI Components Architecture

The repository has been completely restructured from a traditional include-based CI configuration to GitLab CI Components (requires GitLab 17.0+), representing a fundamental modernization of the CI infrastructure.

What's New:

1. GitLab CI Components Catalog

• Added catalog-info.yml defining 9 reusable components
• Creates a browsable CI/CD catalog in GitLab's interface
• Versioned components with type-safe inputs

2. Component Templates Added

• Base Pipeline (templates/base-pipeline/) - Main orchestration component
• Machine-Specific Pipelines (7 components):
  • corona-pipeline, tioga-pipeline, tuolumne-pipeline (Flux scheduler)
  • dane-pipeline, matrix-pipeline (SLURM scheduler)
  • lassen-pipeline (LSF scheduler)
• Performance Pipeline (templates/performance-pipeline/)
• Utility Components:
  • utility-draft-pr-filter - Skip CI on draft PRs
  • utility-branch-skip - Skip CI on non-PR branches

3. Documentation & Examples

• New migration guide: docs/sphinx/user_guide/components_migration.rst
• Example configurations:
  • examples/example-gitlab-ci.yml - Complete component usage
  • examples/example-custom-jobs.yml - Custom job definitions
  • examples/example-jobs-lassen.yml - Machine-specific examples

Benefits of the New Architecture:

• Better versioning - @v2025.12.0 syntax instead of ref:
• Type safety - Validated component inputs
• Cleaner syntax - component: instead of include: project:
• No duplication - Reusable, parameterized templates
• Discoverable - Browse components in GitLab CI/CD Catalog