Struct BuildConfig 

pub struct BuildConfig {
    pub base_image: String,
    pub runtime_image: String,
    pub extra_packages: Vec<String>,
    pub cargo_chef_version: String,
    pub include: Option<Vec<String>>,
    pub env: HashMap<String, String>,
}

Build configuration under [build].

Controls Docker image generation and runtime content.

Bundle strategy

By default, propel deploy bundles all files in the git repository (respecting .gitignore) into the Docker build context. This mirrors the git clone + docker build mental model used by GitHub Actions and similar CI/CD systems.

The bundle is created via git ls-files, so:

• Tracked and untracked (non-ignored) files are included
• .gitignored files (e.g. target/) are excluded
• .propel-bundle/, .propel/, .git/ are always excluded

Runtime content control

The include field controls what goes into the final runtime image:

• include omitted (default): the entire bundle is copied into the runtime container via COPY . .. Zero config — migrations, templates, static assets all work automatically.

• include specified: only the listed paths (plus the compiled binary) are copied into the runtime image. This acts as a lightweight alternative to propel eject for users who want smaller images.

Escalation path

Zero config  →  include/env  →  propel eject
(all-in)        (selective)      (full Dockerfile control)

Fields

base_image: String

Rust builder image (default: rust:1.84-bookworm).

runtime_image: String

Runtime base image (default: gcr.io/distroless/cc-debian12).

extra_packages: Vec<String>

Additional system packages to install via apt-get during build.

cargo_chef_version: String

Cargo Chef version for dependency caching.

include: Option<Vec<String>>

Paths to copy into the runtime image.

When None, the entire bundle is copied (COPY . .). When Some, only these paths are copied — overriding the all-in default.

[build]
include = ["migrations/", "templates/"]

env: HashMap<String, String>

Static environment variables baked into the container image.

These become ENV directives in the generated Dockerfile. For runtime-configurable values (API keys, secrets), use Cloud Run environment variables or Secret Manager instead.

[build.env]
TEMPLATE_DIR = "/app/templates"

Trait Implementations

impl Clone for BuildConfig

fn clone(&self) -> BuildConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BuildConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for BuildConfig

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for BuildConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for BuildConfig

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.