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https://github.com/LemmyNet/lemmy.git
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fix: Cross-compilation to ARM64 (#4142)
* feat(docker/docs): explain how building lemmy works Signed-off-by: Enzo NOCERA <enzo@nocera.eu> * feat: add arm build * review: rename script & fix typo * feat(ci): allow cross platform compilation * feat(ci): prettier * fix(docker): fix base image name * fix: add dockerfile in CI path Signed-off-by: Enzo Nocera <enzo@nocera.eu> * fix(docker): fix runner name * fix(docker): fix builder base image * fix(docker): fix builder base image platform * fix(docker): avoid using the wrapper adduser/addgroup * feat: avoid adding the whole docker directory in the build context --------- Signed-off-by: Enzo NOCERA <enzo@nocera.eu> Signed-off-by: Enzo Nocera <enzo@nocera.eu> Co-authored-by: Dessalines <dessalines@users.noreply.github.com> Co-authored-by: Nutomic <me@nutomic.com>
This commit is contained in:
Enzo Nocera
GitHub
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@ -1,6 +1,7 @@
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# build folders and similar which are not needed for the docker build
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target
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docker
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!docker/builders/lemmy-builder-arm64/docker-build.sh
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api_tests
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ansible
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tests
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@ -227,17 +227,29 @@ steps:
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- event: push
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branch: main
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publish_builder_arm64:
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image: woodpeckerci/plugin-docker-buildx
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secrets: [docker_username, docker_password]
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settings:
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repo: dessalines/lemmy-builder-arm64
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dockerfile: docker/builders/lemmy-builder-arm64/Dockerfile
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platforms: linux/amd64
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build_args:
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- RUST_RELEASE_MODE=release
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tag: ${CI_COMMIT_TAG}
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when:
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event: tag
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publish_release_docker:
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image: woodpeckerci/plugin-docker-buildx
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secrets: [docker_username, docker_password]
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settings:
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repo: dessalines/lemmy
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dockerfile: docker/Dockerfile
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# TODO fix arm build: see: https://woodpecker.join-lemmy.org/repos/129/pipeline/2888/20
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# platforms: linux/amd64,linux/arm64
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platforms: linux/amd64
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platforms: linux/amd64, linux/arm64
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build_args:
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- RUST_RELEASE_MODE=release
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- LEMMY_VERSION=${CI_COMMIT_TAG}
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tag: ${CI_COMMIT_TAG}
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when:
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event: tag
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@ -1,10 +1,18 @@
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# syntax=docker/dockerfile:1.6
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ARG RUST_VERSION=1.72.1
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ARG CARGO_BUILD_FEATURES=default
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ARG RUST_RELEASE_MODE=debug
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ARG LEMMY_VERSION="dev"
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ARG AMD_BUILDER_IMAGE=rust:${RUST_VERSION}
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ARG ARM_BUILDER_IMAGE=blackdex/rust-musl:aarch64-musl-stable-${RUST_VERSION}-openssl3
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ARG ARM_BUILDER_IMAGE="dessalines/lemmy-builder-arm64:${LEMMY_VERSION}"
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ARG AMD_RUNNER_IMAGE=debian:bookworm-slim
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ARG ARM_RUNNER_IMAGE=alpine:3.18
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ARG ARM_RUNNER_IMAGE=debian:bookworm-slim
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ARG UNAME=lemmy
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ARG UID=1000
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ARG GID=1000
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# AMD64 builder
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FROM --platform=${BUILDPLATFORM} ${AMD_BUILDER_IMAGE} AS build-amd64
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@ -33,79 +41,41 @@ RUN set -ex; \
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fi
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# ARM64 builder
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# TODO currently broken
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# FROM --platform=${BUILDPLATFORM} ${ARM_BUILDER_IMAGE} as build-arm64
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# NB(raskyld): this is a hack to be able to COPY --from= this image, because the variable doesn't
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# seem to be expended in --form arg of COPY :(
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FROM --platform=linux/amd64 ${ARM_BUILDER_IMAGE} AS build-arm64
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# ENV DEBIAN_FRONTEND=noninteractive
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# ENV CARGO_HOME=/root/.cargo
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# ENV PQ_LIB_DIR=/usr/local/musl/pq15/lib
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# RUN apt update && apt install -y \
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# --no-install-recommends \
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# git
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# RUN mkdir -pv "${CARGO_HOME}" && \
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# rustup set profile minimal && \
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# rustup target add aarch64-unknown-linux-musl
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# ARG CARGO_BUILD_FEATURES
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# ARG RUST_RELEASE_MODE
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# WORKDIR /lemmy
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# COPY . ./
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# # Debug build
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# RUN --mount=type=cache,target=/lemmy/target set -ex; \
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# if [ "${RUST_RELEASE_MODE}" = "debug" ]; then \
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# echo "pub const VERSION: &str = \"$(git describe --tag)\";" > crates/utils/src/version.rs; \
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# cargo build --target=aarch64-unknown-linux-musl --features "${CARGO_BUILD_FEATURES}"; \
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# mv target/aarch64-unknown-linux-musl/debug/lemmy_server ./lemmy; \
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# fi
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# # Release build
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# RUN set -ex; \
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# if [ "${RUST_RELEASE_MODE}" = "release" ]; then \
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# echo "pub const VERSION: &str = \"$(git describe --tag)\";" > crates/utils/src/version.rs; \
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# cargo build --target=aarch64-unknown-linux-musl --features "${CARGO_BUILD_FEATURES}" --release; \
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# mv target/aarch64-unknown-linux-musl/release/lemmy_server ./lemmy; \
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# fi
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## Final image
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FROM ${AMD_RUNNER_IMAGE}
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# amd64 base runner
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FROM ${AMD_RUNNER_IMAGE} AS runner-linux-amd64
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# Federation needs CA certificates
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RUN apt update && apt install -y libssl-dev libpq-dev ca-certificates
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# Debian / Ubuntu non-root user creds
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ARG UNAME=lemmy
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ARG UID=1000
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ARG GID=1000
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RUN groupadd -g $GID -o $UNAME
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RUN useradd -m -u $UID -g $GID -o -s /bin/bash $UNAME
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COPY --from=build-amd64 --chmod=0755 /lemmy/lemmy /usr/local/bin
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# arm base runner
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FROM ${ARM_RUNNER_IMAGE} AS runner-linux-arm64
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RUN apt update && apt install -y ca-certificates libssl-dev libpq-dev
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COPY --from=build-arm64 --chmod=0755 /home/lemmy/lemmy_server /usr/local/bin
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# Final image that use a base runner based on the target OS and ARCH
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FROM runner-${TARGETOS}-${TARGETARCH}
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LABEL org.opencontainers.image.authors="The Lemmy Authors"
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LABEL org.opencontainers.image.source="https://github.com/LemmyNet/lemmy"
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LABEL org.opencontainers.image.licenses="AGPL-3.0-or-later"
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LABEL org.opencontainers.image.description="A link aggregator and forum for the fediverse"
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ARG UNAME
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ARG GID
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ARG UID
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RUN groupadd -g ${GID} -o ${UNAME} && \
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useradd -m -u ${UID} -g ${GID} -o -s /bin/bash ${UNAME}
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USER $UNAME
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COPY --from=build-amd64 /lemmy/lemmy ./
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CMD ["./lemmy"]
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ENTRYPOINT ["lemmy_server"]
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EXPOSE 8536
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STOPSIGNAL SIGTERM
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## Arm Runner
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# FROM --platform=${BUILDPLATFORM} ${ARM_RUNNER_IMAGE}
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# ARG UNAME=lemmy
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# ARG UID=1000
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# ARG GID=1000
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# RUN apk add --no-cache ca-certificates
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# COPY --from=build-arm64 --chmod=0755 /lemmy/lemmy /usr/local/bin
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# RUN addgroup -S -g ${GID} ${UNAME} && \
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# adduser -S -H -D -G ${UNAME} -u ${UID} -g "" -s /sbin/nologin ${UNAME}
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# USER $UNAME
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# CMD ["lemmy"]
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# EXPOSE 8536
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# STOPSIGNAL SIGTERM
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21
docker/README.md
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21
docker/README.md
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@ -0,0 +1,21 @@
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# Building Lemmy Images
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Lemmy's images are meant to be **built** on `linux/amd64`,
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but they can be **executed** on both `linux/amd64` and `linux/arm64`.
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To do so we need to use a _cross toolchain_ whose goal is to build
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**from** amd64 **to** arm64.
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Namely, we need to link the _lemmy_server_ with `pq` and `openssl`
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shared libraries and a few others, and they need to be in `arm64`,
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indeed.
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The toolchain we use to cross-compile is specifically tailored for
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Lemmy's needs, see [the image repository][image-repo].
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#### References
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- [The Linux Documentation Project on Shared Libraries][tldp-lib]
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[tldp-lib]: https://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html
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[image-repo]: https://github.com/raskyld/lemmy-cross-toolchains
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23
docker/builders/lemmy-builder-arm64/Dockerfile
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23
docker/builders/lemmy-builder-arm64/Dockerfile
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ARG ARM_CROSS_TOOLCHAIN="ghcr.io/raskyld/aarch64-lemmy-linux-gnu:v0.1.0"
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FROM ${ARM_CROSS_TOOLCHAIN}
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# NB(raskyld): Please, do not hesitate to contact me through @raskyld@social.vivaldi.net (mastodon)
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# If you have any question about the cross-toolchain
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LABEL org.opencontainers.image.authors="Enzo Nocera <enzo@nocera.eu>"
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LABEL org.opencontainers.image.source="https://github.com/LemmyNet/lemmy"
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LABEL org.opencontainers.image.licenses="AGPL-3.0-or-later"
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LABEL org.opencontainers.image.description="A prebuilt lemmy server using a cross toolchain from amd64 to aarch64/arm64"
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ARG CARGO_BUILD_FEATURES=default
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ARG RUST_RELEASE_MODE=debug
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WORKDIR /home/lemmy/src
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USER 10001:10001
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COPY --chown=lemmy:lemmy . ./
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ENV RUST_RELEASE_MODE=${RUST_RELEASE_MODE} \
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CARGO_BUILD_FEATURES=${CARGO_BUILD_FEATURES}
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RUN --mount=type=cache,target=./target,uid=10001,gid=10001 bash ./docker/builders/lemmy-builder-arm64/docker-build.sh
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20
docker/builders/lemmy-builder-arm64/docker-build.sh
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20
docker/builders/lemmy-builder-arm64/docker-build.sh
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#!/usr/bin/env bash
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set -e;
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source "$HOME/.cargo/env"
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case "$RUST_RELEASE_MODE" in
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"debug")
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echo "pub const VERSION: &str = \"$(git describe --tag)\";" > "crates/utils/src/version.rs"
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cargo build --features "${CARGO_BUILD_FEATURES}"
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cp "./target/$CARGO_BUILD_TARGET/$RUST_RELEASE_MODE/lemmy_server" /home/lemmy/lemmy_server
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;;
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"release")
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# Pass a value to $USE_RELEASE_CACHE to avoid purging the cache for release builds
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[[ -z "$USE_RELEASE_CACHE" ]] || cargo clean --release
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echo "pub const VERSION: &str = \"$(git describe --tag)\";" > "crates/utils/src/version.rs"
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cargo build --features "${CARGO_BUILD_FEATURES}" --release
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cp "./target/$CARGO_BUILD_TARGET/$RUST_RELEASE_MODE/lemmy_server" /home/lemmy/lemmy_server
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;;
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esac
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