Raspberry Pi | Cyrille Froehlich

Gitea ARM crossbuild (with GoModules)

Sat, 20 Mar 2021 10:45:24 +0000

Upgrading to Gitea 1.13.4 didn’t go as planned and it failed to compile the go-sqlite3 module with my previous setup. While crossbuilding, the CGO parameter is automatically disabled (i.e. compiling is done with CGO_ENABLED=0) but the go-sqlite3 module won’t build anymore if this option is not set (probably require some optimisation in C and a pure Go implementation won’t fit anymore). As a consequence of enabling this option, setting the environment variable CC to the C cross-compiler explicitly is now mandatory to ensure modules don’t target the wrong platform.

A recent Go compiler will also have the Go Modules support enabled, thus we can now simplify the build process with a more usual checkout/make pattern.

Dockerfile sample:

FROM golang:latest

RUN dpkg --add-architecture armhf

RUN apt-get update
RUN apt-get install -y --no-install-recommends curl git build-essential crossbuild-essential-armhf

SHELL [ "/bin/bash", "--login", "-c" ]

ARG NVM_VERSION="0.37.2"
RUN\
  ( export PROFILE=$HOME/.profile;\
    /usr/bin/curl -o- "https://raw.githubusercontent.com/creationix/nvm/v${NVM_VERSION}/install.sh" | /bin/bash )

ARG NODE_VERSION="14.15.3"
RUN\
  nvm install "${NODE_VERSION}" &&\
  nvm use "v${NODE_VERSION}" &&\
  nvm alias default "v${NODE_VERSION}"

ARG YARN_VERSION="1.22.10"
RUN\
  ( export PROFILE=$HOME/.profile;\
    /usr/bin/curl -o- -L "https:/yarnpkg.com/install.sh" | /bin/bash -s -- --version ${YARN_VERSION})

RUN\
  ( echo ;\
    echo 'source $HOME/.nvm/nvm.sh';\
    echo 'export PATH=/go/bin:/usr/local/go/bin:${PATH}'; ) >> $HOME/.profile

WORKDIR /go

ENV GOARM=7
ENV GOARCH=arm
ENV GOOS=linux
ENV CGO_ENABLED=1
ENV CC=arm-linux-gnueabihf-gcc

ARG GITEA_VERSION="v1.13.4"
RUN git clone --shallow-submodules --recurse-submodules --branch "${GITEA_VERSION}" --depth 1 https://github.com/go-gitea/gitea.git gitea

ENV TAGS="bindata sqlite sqlite_unlock_notify"
RUN cd gitea && make build

Which we can run with (replace the host_output_dir with some folder on the host):

docker build -t gitea-arm-builder .
docker run --rm -v [host_output_dir]:/output gitea-arm-builder cp /go/src/code.gitea.io/gitea/gitea /output/gitea-1.13.4-arm-linux

Gitea ARM crossbuild

Sun, 03 Nov 2019 12:45:24 +0000

Instead of building the Gitea binary on a Raspberry PI, we can speed up things a bit by crossbuilding from some other computer with more punch. Recent version of Gitea will need nodejs/npm to be available at build time, so we’ll install this too.

Dockerfile sample:

FROM golang:latest

RUN dpkg --add-architecture armhf

RUN apt-get update
RUN apt-get install -y --no-install-recommends curl git build-essential crossbuild-essential-armhf

SHELL [ "/bin/bash", "--login", "-c" ]

ARG NVM_VERSION="0.37.2"
RUN\
  ( export PROFILE=$HOME/.profile;\
    /usr/bin/curl -o- "https://raw.githubusercontent.com/creationix/nvm/v${NVM_VERSION}/install.sh" | /bin/bash )

ARG NODE_VERSION="14.15.3"
RUN\
  nvm install "${NODE_VERSION}" &&\
  nvm use "v${NODE_VERSION}" &&\
  nvm alias default "v${NODE_VERSION}"

ARG YARN_VERSION="1.22.10"
RUN\
  ( export PROFILE=$HOME/.profile;\
    /usr/bin/curl -o- -L "https:/yarnpkg.com/install.sh" | /bin/bash -s -- --version ${YARN_VERSION})

RUN\
  ( echo ;\
    echo 'source $HOME/.nvm/nvm.sh';\
    echo 'export PATH=/go/bin:/usr/local/go/bin:${PATH}'; ) >> $HOME/.profile

WORKDIR /go

ENV GOARM=7
ENV GOARCH=arm
ENV GOOS=linux

ARG GITEA_VERSION="v1.12.6"

RUN go get -d -u code.gitea.io/gitea

RUN cd /go/src/code.gitea.io/gitea && git checkout ${GITEA_VERSION}

RUN cd /go/src/code.gitea.io/gitea && TAGS="bindata sqlite sqlite_unlock_notify" make build

Which we can run with (replace the host_output_dir with some folder on the host):

docker build -t gitea-arm-builder .
docker run --rm -v [host_output_dir]:/output gitea-arm-builder cp /go/src/code.gitea.io/gitea/gitea /output/gitea-1.12.5-arm-linux

My real setup is a little bit more involved as it uses Docker-Compose and multi-staged Dockerfiles to share the nodejs install and optimize the build.

Gitea ARM7 build (Raspberry PI 2)

Sun, 03 Nov 2019 12:45:24 +0000

I’m hosting my projects code on a Gitea instance running on a Raspberry PI. Thing is, the last Raspbian update broke the gitea binary: probably some change in the kernel or libc. The official gitea build for ARM kept crashing with a segmentation fault before even entering the main. Of course, latest gitea builds were also broken. Only building Gitea from source eventually fixed the issue.

I had to bump the swapfile size a bit as the build process burst to 1.2Go of memory (RPI2 have 1Go, and default swap was set to 100Mo… Murphy strikes again) :

$ dphys-swapfile swapoff
# Edit the size in /etc/dphys-swapfile
# Then recreate the swap
$ dphys-swapfile setup
$ dphys-swapfile swapon

Grab an up-to-date golang compiler:

$ docker pull golang
$ docker run -it golang bash

Now, inside the container, retrieve the source and build:

% export GOOS=linux GOARCH=arm GOARM=7
% go get -d -u code.gitea.io/gitea
% cd $GOPATH/src/code.gitea.io/gitea
% git checkout v1.12.5
% TAGS="bindata sqlite sqlite_unlock_notify" make build

Retrieve the file:

$ docker cp [your container name]:/go/src/code.gitea.io/gitea/gitea gitea-1.12.5-linux-arm-7
# My service file references the gitea symlimk, just point to the new file
$ ln -sf gitea-1.12.5-linux-arm-7 gitea
$ systemctl restart gitea