The `build` command in the Hapi CLI is used to compile a Hapi application for production deployment. It typically bundles the application's source code, assets, and dependencies into an optimized output directory, ready for serving.

Syntax

Options

While the Hapi CLI itself is more of a foundational tool for Hapi projects (often used with `hapi new` or `hapi generate`), a dedicated `build` command isn't a core, universal feature directly provided by the `hapi-cli` package in the same way `ng build` is for Angular or `next build` for Next.js. Hapi, being a backend framework, typically relies on standard Node.js project build practices, often using tools like Webpack, Babel, or simply `npm` scripts to compile frontend assets or transpile backend code if necessary.

However, if a specific Hapi *project template* or a custom `hapi-cli` extension *were* to implement a `build` command, its options would be entirely dependent on that implementation. Common options for a `build` command in a web project might include:

* `--env <environment>`: Specify the build environment (e.g., `production`, `development`).

* `--output <path>`: Define the output directory for the built assets.

* `--sourcemaps`: Generate source maps for easier debugging.

* `--minify`: Minify the output code for smaller file sizes.

* `--clean`: Clean the output directory before building.

**Important Note:** The official `hapi-cli` package (found on npm) primarily focuses on scaffolding new projects (`hapi new`) and generating components (`hapi generate`). It does *not* provide an inherent `hapi build` command for compiling applications out-of-the-box. The build process for a Hapi application is typically handled by `npm` scripts defined in the project's `package.json` file, leveraging tools like:

* **Webpack/Rollup:** For bundling frontend assets (if the Hapi app serves a frontend).

* **Babel/TypeScript:** For transpiling modern JavaScript/TypeScript to a compatible version for the target Node.js environment.

* **NPM Scripts:** For orchestrating these build steps.

Usage Examples (Hypothetical, based on common CLI patterns)

If a Hapi project *did* have a custom `hapi build` command configured in its `package.json` or through a specific project setup, here's how it might be used:

1. **Basic Production Build:**

This would typically run the default production build process, optimizing code and assets.

2. **Building for a Specific Environment (e.g., staging):**

This might apply specific configurations or API endpoints relevant to a staging environment.

3. **Building with Source Maps:**

Useful for debugging issues in a deployed environment where the code is minified.

4. **Cleaning and Building:**

Ensures a fresh build by removing previous build artifacts before starting.

Real-world Hapi Build Process (using `npm` scripts)

In a typical Hapi project, you would define build steps in your `package.json` like this:

To build this hypothetical Hapi application, you would then run:

And to start the production build:

Explanation

Since the Hapi CLI itself is relatively minimal, focusing on project scaffolding, any `build` functionality would be an extension of the project's own `package.json` scripts or a custom plugin/template that leverages other build tools. The examples provided assume such an extension exists, but in practice, Hapi developers use standard Node.js build pipelines orchestrated by `npm` scripts. These scripts typically involve transpilation (e.g., Babel for modern JS), bundling (e.g., Webpack for frontend assets), and copying necessary files to a production-ready `dist` directory.