Rust

Railpack builds and deploys Rust applications.

Detection

Your project will be detected as a Rust application if any of these conditions are met:

• A Cargo.toml file is present

Versions

The Rust version is determined in the following order:

• Set via the package.edition field in the Cargo.toml file
• Set via the RAILPACK_RUST_VERSION environment variable
• Read from the .rust-version or rust-version.txt file
• Read from the package.rust-version field in the Cargo.toml file
• Read from the toolchain.version field in the rust-toolchain.toml file
• Defaults to 1.85.1

Runtime Variables

These variables are available at runtime:

ROCKET_ADDRESS="0.0.0.0"

Configuration

Railpack builds your Rust application based on your project structure. The build process:

• Installs Rust and required system dependencies
• Installs package dependencies
• Compiles the application to a binary

The start command is:

./bin/<project-name>

Config Variables

Variable	Description	Example
RAILPACK_RUST_VERSION	Override the Rust version	1.85.1