Dockerfile.bootstrapper

# syntax=docker/dockerfile:1.7
#
# Cross-RID build for the `interfold-bootstrap` self-contained ELF. SDK stage
# is pinned to $BUILDPLATFORM so per-arch publishes cross-compile natively
# (no QEMU). PublishProfile XMLs under
# tools/Interfold.Bootstrapper/Properties/PublishProfiles/ own the
# SelfContained / Trim / single-file settings — this file is just the wrapper.

FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:10.0 AS build
ARG TARGETARCH
WORKDIR /src
COPY . .
RUN --mount=type=cache,id=nuget,target=/root/.nuget/packages,sharing=locked \
    case "$TARGETARCH" in \
        amd64) RID=linux-x64 ;; \
        arm64) RID=linux-arm64 ;; \
        arm)   RID=linux-arm ;; \
        *) echo "Unsupported TARGETARCH: $TARGETARCH" >&2; exit 1 ;; \
    esac && \
    dotnet publish tools/Interfold.Bootstrapper \
        --configuration Release \
        --runtime "$RID" \
        /p:PublishProfile="$RID" && \
    mkdir -p /out && \
    cp "tools/Interfold.Bootstrapper/bin/Release/net10.0/$RID/publish/interfold-bootstrap" /out/

# `scratch` so `--output=type=local` extracts only the binary, no rootfs noise.
FROM scratch AS out
COPY --from=build /out/interfold-bootstrap /interfold-bootstrap