static-envsubst

Author: Tob1as

static-envsubst.scratch.Dockerfile

@@ -0,0 +1,51 @@
+# build: docker build --no-cache --progress=plain --target binary --build-arg ENVSUBST_VERSION=1.4.3 -t tobi312/tools:static-envsubst -f static-envsubst.scratch.Dockerfile .
+ARG ENVSUBST_VERSION
+FROM alpine:latest AS static-envsubst
+
+ARG ENVSUBST_VERSION
+
+# envsubst https://github.com/a8m/envsubst
+
+SHELL ["/bin/ash", "-euxo", "pipefail", "-c"]
+
+RUN \
+    ARCH=$(uname -m) ; \
+    echo ">> ARCH=$ARCH" ; \
+    case "$ARCH" in \
+      x86_64) TARGETARCH="x86_64" ;; \
+      aarch64) TARGETARCH="arm64" ;; \
+      *) echo ">> Unknown architecture: $ARCH" && exit 1 ;; \
+    esac ; \
+    echo ">> Mapped architecture: $TARGETARCH" ; \
+    \
+    ENVSUBST_VERSION=${ENVSUBST_VERSION:-$(wget -qO- https://api.github.com/repos/a8m/envsubst/releases/latest | grep 'tag_name' | cut -d\" -f4)} ; \
+    ENVSUBST_VERSION=$(echo ${ENVSUBST_VERSION} | sed 's/^v//') ; \
+    echo ">> ENVSUBST_VERSION=${ENVSUBST_VERSION}" ; \
+    wget -q "https://github.com/a8m/envsubst/releases/download/v${ENVSUBST_VERSION}/envsubst-Linux-${TARGETARCH}" -O /usr/local/bin/envsubst ; \
+    chmod +x /usr/local/bin/envsubst ; \
+    echo ">> envsubst Help:" ; \
+    envsubst -help
+
+
+FROM scratch AS binary
+
+ARG ENVSUBST_VERSION
+ARG VCS_REF
+ARG BUILD_DATE
+
+LABEL org.opencontainers.image.title="envsubst" \
+      org.opencontainers.image.authors="a8m, Tobias Hargesheimer <docker@ison.ws>" \
+      org.opencontainers.image.version="${ENVSUBST_VERSION}" \
+      org.opencontainers.image.created="${BUILD_DATE}" \
+      org.opencontainers.image.revision="${VCS_REF}" \
+      org.opencontainers.image.description="Static envsubst - environment variables substitution for Go" \
+      org.opencontainers.image.documentation="https://github.com/a8m/envsubst" \
+      org.opencontainers.image.licenses="MIT" \
+      org.opencontainers.image.base.name="scratch" \
+      org.opencontainers.image.url="https://github.com/Tob1as/docker-tools" \
+      org.opencontainers.image.source="https://github.com/a8m/envsubst"
+
+COPY --from=static-envsubst /usr/local/bin/envsubst /usr/local/bin/envsubst
+
+ENTRYPOINT ["envsubst"]
+#CMD ["-help"]