An open and modular toolchain to develop state-of-the-art applications based on the UI5 framework.
This repository contains the current development state of the upcoming UI5 CLI v5 release.
Note that previous versions (up to v4) are maintained in dedicated repositories.
UI5 CLI v4 is the latest and stable version 🎉
UI5 CLI v3 and UI5 CLI v2 have been deprecated 🚫
We highly recommend migrating to the latest version.
- Documentation
- API Reference
- CLI Documentation
- Project Configuration
- 🎬 UI5con@SAP 2025 Talk
- 🎬 UI5con@SAP 2020 Talk
- 🎬 UI5con@SAP 2018 Talk
- Contribution Guidelines
- Roadmap
UI5 CLI consists of multiple packages managed within this monorepo:
- packages/cli: UI5 Command Line Interface, utilizing all of the following packages
- packages/project: Modules for building a UI5 project's dependency tree, including configuration
- packages/server: Modules for running a UI5 development server
- packages/builder: Modules for building UI5 projects
- packages/fs: UI5 specific file system abstraction
- packages/logger: Internal logging module
Usage Overview (arrows indicate dependencies)
This fork is evaluated together with sibling bun and ui5-cli-on-bun checkouts.
Run the comparison from the standalone harness repository:
cd ../ui5-cli-on-bun
npm run compare:fixturesProfile a specific fixture under both runtimes with:
npm run profile:fixture:node -- --only builder/application.e --repeat 3
npm run profile:fixture:bun -- --only builder/application.e --repeat 3The harness resolves sibling repositories by default:
../bun../cli
Override those locations with BUN_REPO and UI5_CLI_REPO if your checkouts live elsewhere.
Latest local runtime comparison (npm run compare:fixtures, 2026-04-15):
| Metric | Node | Bun | Delta |
|---|---|---|---|
| Overall wall time | 30.42 s | 30.25 s | Bun faster by 0.17 s |
| Build total | 28.64 s | 28.55 s | Bun faster by 0.09 s |
| Build prepare | 9.45 s | 9.97 s | Bun slower by 0.52 s |
Build ui5 |
18.74 s | 18.18 s | Bun faster by 0.56 s |
| Serve | 1.07 s | 1.06 s | Bun faster by 0.01 s |
| Parity | 0.62 s | 0.55 s | Bun faster by 0.07 s |
The current fork change disables worker-backed minify and theme builds under Bun, which removed the large workerpool cleanup penalty that previously dominated Bun build time. Repeat the comparison on your own machine before treating these numbers as canonical.
Please check our Contribution Guidelines.
Please follow our Contribution Guidelines on how to report an issue. Or chat with us in the #tooling channel of the OpenUI5 Community Slack. For public Q&A, use the ui5-tooling tag on Stack Overflow.
Thanks go out to Holger Schäfer for the amazing UI5 VitePress project, which serves as the foundation for the UI5 CLI documentation.