---
sidebar_label: Multi-package workspace
---

# Multi-Package Workspace

A project with three packages: two libraries and a binary.

## Structure

```
workspace/
├── dcr.toml              # root workspace
├── lib-core/
│   ├── dcr.toml
│   └── src/core.c
├── lib-utils/
│   ├── dcr.toml
│   └── src/utils.c
└── app/
    ├── dcr.toml
    └── src/main.c
```

## Root dcr.toml

```toml
[package]
name = "my-workspace"
version = "0.1.0"
type = "none"

[build]
inherit = true
language = "c"
standard = "c11"

[workspace.lib-core]
path = "lib-core"

[workspace.lib-utils]
path = "lib-utils"
deps = ["lib-core"]

[workspace.app]
path = "app"
deps = ["lib-core", "lib-utils"]
main = true
```

## Packages

`lib-core/dcr.toml`:
```toml
[package]
name = "lib-core"
version = "0.1.0"
type = "none"

[build]
kind = "staticlib"
```

`lib-utils/dcr.toml`:
```toml
[package]
name = "lib-utils"
version = "0.1.0"
type = "none"

[build]
kind = "staticlib"
```

`app/dcr.toml`:
```toml
[package]
name = "app"
version = "0.1.0"
type = "none"

[build]
kind = "bin"
```

## Build

```bash
cd workspace
dcr build                     # builds everything in correct order
dcr build --workspace app     # only app (lib-core and lib-utils built as deps)
dcr run                       # builds and runs main package
```

Build order (topological sort):
1. `lib-core`
2. `lib-utils` (depends on lib-core)
3. `app` (depends on lib-core, lib-utils)