Online Jenkins Formatter

This tool reformats Jenkins pipelines written in Groovy to a canonical, readable structure. It operates on both Declarative and Scripted Jenkinsfiles and preserves comments and literals while applying consistent indentation and line breaks. The formatter is grammar-aware, ensuring changes respect Groovy syntax and Jenkins-specific constructs. It supports configurable indentation, wrap width, and style templates, and can emit a diff to assist code reviews. The result is predictable, idempotent formatting that improves maintainability across multiple repositories and teams. Conceptually, the system parses the Jenkinsfile, analyzes its AST, and rewrites layout according to a fixed set of style rules. It does not execute the pipeline or validate runtime behavior. The formatter aims for stability across successive runs, so reformatting an already formatted file yields little to no changes. Optional templates allow organizations to codify preferred brace styles, spacing, and wrapping levels. The tool integrates into CI workflows by producing a clean, diff-friendly output. Intended users include DevOps engineers, build engineers, and CI/CD owners who want consistent Jenkinsfile quality without risking pipeline semantics. Use cases include pre-merge formatting in PRs, standardizing styles during migrations, and improving readability in large pipelines. It is not a runtime validator; semantic verification remains the responsibility of the pipeline runner.