FROM alpine:latest MAINTAINER Jessie Frazelle RUN apk add --no-cache \ ca-certificates \ gnupg \ && rm -rf /var/lib/apt/lists/* ENV TARSNAP_VERSION 1.0.37 RUN set -x \ && apk add --no-cache --virtual .build-deps \ build-base \ curl \ e2fsprogs-libs \ e2fsprogs-dev \ make \ openssl-dev \ perl-digest-sha1 \ tar \ zlib-dev \ && curl -sSL "https://www.tarsnap.com/download/tarsnap-autoconf-${TARSNAP_VERSION}.tgz" -o /tmp/tarsnap.tgz \ && curl -sSL "https://www.tarsnap.com/download/tarsnap-sigs-${TARSNAP_VERSION}.asc" -o /tmp/tarsnap.tgz.asc \ && curl -sSL "https://www.tarsnap.com/tarsnap-signing-key-2015.asc" | gpg --import \ && sha=$(gpg --decrypt /tmp/tarsnap.tgz.asc | awk '{ print $4 }') \ && if [ "$sha" != "$(shasum -a 256 /tmp/tarsnap.tgz | awk '{ print $1 }')" ]; then exit 1; fi \ && mkdir -p /usr/src/tarsnap \ && tar -xzf /tmp/tarsnap.tgz -C /usr/src/tarsnap --strip-components 1 \ && rm /tmp/tarsnap.tgz* \ && ( \ cd /usr/src/tarsnap \ && ./configure --prefix=/usr \ && make \ && make install \ ) \ && rm -rf /usr/src/tarsnap \ && apk del .build-deps ENTRYPOINT [ "tarsnap" ] CMD [ "--help" ]