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sidebar_label: License
---

# License

## DCR

DCR itself is [GPL-3.0-or-later](https://spdx.org/licenses/GPL-3.0-or-later.html) licensed.

> **Note:** DCR is a build tool, not a library. The GPL applies only to DCR's own source code. Projects built with DCR are not subject to DCR's license — their licensing is determined solely by their own code and dependencies.

## Vendored libraries

DCR statically links the following C libraries through its vendored Rust dependencies:

| Library                                    | License            | Bundled by                    |
| ------------------------------------------ | ------------------ | ----------------------------- |
| [libgit2](https://libgit2.org)             | MIT OR Apache-2.0  | `git2` / `libgit2-sys`        |
| [libssh2](https://libssh2.org)             | MIT OR Apache-2.0  | `libgit2-sys`                 |
| [zlib](https://zlib.net)                   | MIT OR Apache-2.0  | `libgit2-sys`                 |
| [OpenSSL](https://openssl.org)             | Apache-2.0         | `openssl-sys` / `openssl-src` |
| [ring](https://github.com/briansmith/ring) | Apache-2.0 AND ISC | `rustls`                      |

## Rust dependencies

DCR is written in Rust. The following notable Rust crates are statically linked:

| Crate                                         | License                  |
| --------------------------------------------- | ------------------------ |
| [`reqwest`](https://crates.io/crates/reqwest) | MIT OR Apache-2.0        |
| [`rustls`](https://crates.io/crates/rustls)   | Apache-2.0 OR ISC OR MIT |
| [`serde`](https://crates.io/crates/serde)     | MIT OR Apache-2.0        |
| [`toml`](https://crates.io/crates/toml)       | MIT OR Apache-2.0        |
| [`sha2`](https://crates.io/crates/sha2)       | MIT OR Apache-2.0        |
| [`git2`](https://crates.io/crates/git2)       | MIT OR Apache-2.0        |
| [`openssl`](https://crates.io/crates/openssl) | Apache-2.0               |
| [`tokio`](https://crates.io/crates/tokio)     | MIT                      |
| [`hyper`](https://crates.io/crates/hyper)     | MIT                      |
| [`ctrlc`](https://crates.io/crates/ctrlc)     | MIT OR Apache-2.0        |

Full dependency tree (143 packages) is available in [`Cargo.lock`](https://github.com/dexoron/dcr/blob/main/Cargo.lock). The overwhelming majority are dual-licensed under MIT OR Apache-2.0.

## Additional credits

* DCR's CLI design and project model are inspired by [Cargo](https://doc.rust-lang.org/cargo/).