add tofu

src/tools/build.mk

@@ -7,3 +7,8 @@ out/curl.tgz: \
 	out/openssl.tgz \
 	out/ca-certificates.tgz
 	$(call build,tools,curl)
+
+out/tofu.tgz: \
+	out/busybox.tgz \
+	out/go.tgz
+	$(call build,tools,tofu)

src/tools/tofu/Dockerfile

@@ -0,0 +1,45 @@
+ARG REGISTRY=local
+FROM ${REGISTRY}/go:latest as go
+FROM ${REGISTRY}/busybox:latest as busybox 
+FROM ${REGISTRY}/ca-certificates:latest as ca-certificates
+
+FROM busybox as base
+ENV VERSION=1.6.0-beta4
+ENV SRC_SITE=https://github.com/opentofu/opentofu/archive/refs/tags
+ENV SRC_HASH=b14f151839d90d06f95ba4257be159857606daf522d99e9285ddb248f814393f
+RUN echo ${SRC_SITE}/${VERSION}.tar.gz
+
+FROM base as fetch
+COPY --from=go . /
+COPY --from=ca-certificates . /
+
+RUN set -eux; \
+    wget ${SRC_SITE}/v${VERSION}.tar.gz; \
+    echo "${SRC_HASH}  v${VERSION}.tar.gz" | sha256sum -c; 
+
+FROM fetch as build
+RUN tar -xvf v${VERSION}.tar.gz
+WORKDIR opentofu-${VERSION}
+ENV PWD=/home/user/opentofu-${VERSION}
+ENV GOPATH=${PWD}/cache/go
+ENV GOCACHE=${PWD}/cache/
+ENV GOWORK=off
+ENV GOPROXY=https://proxy.golang.org,direct
+ENV GOSUMDB=sum.golang.org
+
+ENV CGO_ENABLED=0
+ENV GOHOSTOS=linux
+ENV GOHOSTARCH=amd64
+ENV GOFLAGS=-trimpath 
+RUN mkdir -p ${GOPATH}
+RUN go build -o bin/tofu ./cmd/tofu
+
+from build as install
+USER 0:0
+RUN mkdir -p /rootfs/usr/bin/
+RUN cp bin/tofu /rootfs/usr/bin/
+
+FROM scratch as package
+COPY --from=install /rootfs/ /
+ENTRYPOINT ["/usr/bin/tofu"]
+CMD ["--version"]