# See www/containers.md for documentation on how to use this file.
# STAGE 1: Build a static Fossil binary atop Alpine Linux
FROM alpine:latest AS builder
COPY containers/busybox-config /tmp/bbx/.config
ARG BBXVER="1_35_0"
ENV BBXURL "https://github.com/mirror/busybox/tarball/${BBXVER}"
ARG FSLVER="@FOSSIL_CI_PFX@"
ENV FSLURL "https://fossil-scm.org/home/tarball/?r=${FSLVER}"
ADD $BBXURL /tmp/bbx/src.tar.gz
ADD $FSLURL /tmp/fsl/src.tar.gz
WORKDIR /tmp
RUN set -x \
&& apk update \
&& apk upgrade --no-cache \
&& apk add --no-cache \
gcc make moreutils \
linux-headers musl-dev \
openssl-dev openssl-libs-static \
zlib-dev zlib-static \
&& tar --strip-components=1 -C bbx -xzf bbx/src.tar.gz \
&& ( cd bbx && yes "" | make oldconfig && make -j11 ) \
&& tar -C fsl -xzf fsl/src.tar.gz \
&& m=fsl/src/main.mk ; grep -v '/skins/[a-ce-z]' $m | sponge $m \
&& fsl/configure --static CFLAGS='-Os -s' && make -j11 \
&& if apk add upx ; then upx -9 fossil bbx/busybox ; fi
# STAGE 2: Pare that back to the bare essentials.
FROM scratch
WORKDIR /jail
ARG UID=499
ENV PATH "/bin:/jail/bin"
COPY --from=builder /tmp/fossil bin/
COPY --from=builder /tmp/bbx/busybox /bin/
RUN [ "/bin/busybox", "--install", "/bin" ]
RUN set -x \
&& mkdir -m 755 dev \
&& mknod -m 666 dev/null c 1 3 \
&& mknod -m 444 dev/urandom c 1 9 \
&& mkdir -m 700 log museum \
&& echo 'root:x:0:0:SysAdmin:/:/bin/nologin' > /etc/passwd \
&& echo 'root:x:0:root' > /etc/group \
&& addgroup -g ${UID} fossil \
&& adduser -h `pwd` -g 'Fossil User' -G fossil -u ${UID} -S fossil \
&& echo -e '#!/bin/sh\nfossil sha1sum "$@"' > /bin/sha1sum \
&& echo -e '#!/bin/sh\nfossil sha3sum "$@"' > /bin/sha3sum \
&& echo -e '#!/bin/sh\nfossil sqlite3 --no-repository "$@"' > /bin/sqlite3 \
&& ln -s /jail/bin/fossil /bin/f \
&& chmod +x /bin/sha?sum /bin/sqlite3 \
&& chown fossil:fossil . log museum
# Now we can run the stripped-down environment in a chroot jail, while
# leaving open the option to debug it live via the Busybox shell.
EXPOSE 8080/tcp
CMD [ \
"bin/fossil", "server", \
"--chroot", "/jail", \
"--create", \
"--jsmode", "bundled", \
"--user", "admin", \
"museum/repo.fossil"]