Struct OciImageConfig 

pub struct OciImageConfig {
    pub working_dir: Option<String>,
    pub env: Vec<String>,
    pub entrypoint: Option<Vec<String>>,
    pub cmd: Option<Vec<String>>,
    pub user: Option<String>,
    pub exposed_ports: BTreeMap<String, Value>,
    pub volumes: BTreeMap<String, Value>,
    pub labels: BTreeMap<String, String>,
    pub stop_signal: Option<String>,
    pub healthcheck: Option<OciHealthcheck>,
    pub shell: Option<Vec<String>>,
    pub on_build: Vec<String>,
}

OCI image config accumulated during instruction execution.

Config-only Dockerfile instructions (WORKDIR / ENV / ENTRYPOINT / CMD / USER / EXPOSE / VOLUME / LABEL / SHELL / STOPSIGNAL / HEALTHCHECK) mutate this struct in-place during 4.C; task 4.D serialises it into the OCI image config blob alongside the layer descriptors on BuildSkeleton.

Field shape matches the OCI image-spec application/vnd.oci.image.config.v1+json config object so 4.D’s emission step is a straight serde_json::to_value over each field without remapping.

Fields

working_dir: Option<String>

WorkingDir in the OCI config — the cwd applied to subsequent RUN steps and to the final container’s process. WORKDIR with a relative path resolves against the previous WORKDIR per the Dockerfile spec.

env: Vec<String>

Env in the OCI config — list of KEY=value entries. Builder-side ENV mutation enforces last-write-wins per key so the vector never grows duplicate KEYs.

entrypoint: Option<Vec<String>>

Entrypoint in the OCI config. ENTRYPOINT shell form is rewritten to ["cmd", "/c", "<rest>"] for WCOW; exec form is passed through as-is.

cmd: Option<Vec<String>>

Cmd in the OCI config. Setting ENTRYPOINT resets CMD to None per the Dockerfile spec.

user: Option<String>

User in the OCI config (e.g. "ContainerUser" or "user:group").

exposed_ports: BTreeMap<String, Value>

ExposedPorts in the OCI config — map of "<port>/<proto>" → empty object. Stored as BTreeMap so the serialised key order is deterministic across runs.

volumes: BTreeMap<String, Value>

Volumes in the OCI config — map of <path> → empty object.

labels: BTreeMap<String, String>

Labels in the OCI config — string→string map. Multiple LABEL lines merge; later LABEL with the same KEY wins.

stop_signal: Option<String>

StopSignal in the OCI config (e.g. "SIGTERM"). Carried as-is from the STOPSIGNAL instruction.

healthcheck: Option<OciHealthcheck>

Healthcheck in the OCI config. None means no healthcheck was configured (and the base image’s healthcheck is inherited); HEALTHCHECK NONE sets this to a sentinel OciHealthcheck::disabled.

shell: Option<Vec<String>>

Shell in the OCI config — list of tokens (["cmd", "/c"] for the default WCOW shell, or a user override via the SHELL instruction).

on_build: Vec<String>

OnBuild triggers in the OCI config — list of raw Dockerfile instruction text ("COPY . /app" etc.). Only matters when this image is used as a base; the builder itself never re-executes them in the producing build.

Trait Implementations

impl Clone for OciImageConfig

fn clone(&self) -> OciImageConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OciImageConfig

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

Formats the value using the given formatter.

impl Default for OciImageConfig

fn default() -> OciImageConfig

Returns the “default value” for a type.