Enum Runtime 

pub enum Runtime {
    Node20,
    Node22,
    Python312,
    Python313,
    Rust,
    Go,
    Deno,
    Bun,
    WindowsNanoserver,
    WindowsServerCore,
    Wasm(WasmTargetHint),
}

Supported runtime environments

Variants

Node20

Node.js 20 (LTS)

Node22

Node.js 22 (Current)

Python312

Python 3.12

Python313

Python 3.13

Rust

Rust (latest stable)

Go

Go (latest stable)

Deno

Deno (latest)

Bun

Bun (latest)

WindowsNanoserver

Windows Nanoserver (mcr.microsoft.com/windows/nanoserver:ltsc2022).

Minimal Windows base image for self-contained binaries. No PowerShell, no chocolatey, no winget.

WindowsServerCore

Windows Server Core (mcr.microsoft.com/windows/servercore:ltsc2022).

Larger Windows base that bundles PowerShell and is compatible with chocolatey / winget / full .NET SDK workloads.

Wasm(WasmTargetHint)

WebAssembly (delegates to wasm: build mode).

The associated WasmTargetHint is a best-effort indicator of whether the project builds a raw WASI module or a WASI component. Downstream build logic treats this as guidance only; the actual target is still driven by the ZImagefile wasm: section (or its defaults).

Implementations

impl Runtime

pub fn all() -> &'static [RuntimeInfo]

Get all available runtimes

pub fn from_name(name: &str) -> Option<Runtime>

Parse a runtime from its name

pub fn info(&self) -> &'static RuntimeInfo

Get information about this runtime

Panics

Panics if the runtime variant is missing from the static info table (internal invariant).

pub fn template(&self) -> &'static str

Get the Dockerfile template for this runtime

Note on Runtime::Wasm

The WASM variant does not produce a Dockerfile — it is a sentinel that tells the builder to delegate to the wasm: build mode. The returned string is a ZImagefile YAML snippet (see Runtime::wasm_zimagefile) so callers that feed template() output through the ZImagefile parser will cleanly route into the WASM build path. Callers that feed it through the Dockerfile parser must special-case Runtime::Wasm(_).

pub fn name(&self) -> &'static str

Get the canonical name for this runtime

Trait Implementations

impl Clone for Runtime

fn clone(&self) -> Runtime

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Runtime

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

Formats the value using the given formatter.

impl Display for Runtime

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

Formats the value using the given formatter.

impl FromStr for Runtime

type Err = String

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for Runtime

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Runtime

fn eq(&self, other: &Runtime) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Runtime

impl Eq for Runtime

impl StructuralPartialEq for Runtime