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Commit 58c2307

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hiddecohiddeco
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Signed-off-by: Hidde Beydals <hello@hidde.co>
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‎.dockerignore‎

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**/**
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!CMakeLists.txt

‎.github/workflows/build-multi-platform.yaml‎

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---
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name: 'Container image'
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on:
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push:
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branches:
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- main
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- dev
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pull_request:
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jobs:
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build:
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runs-on: ubuntu-latest
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strategy:
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fail-fast: false
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matrix:
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platforms:
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- linux/amd64
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- linux/amd64,linux/arm/v7,linux/arm64
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services:
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registry:
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image: registry:2
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ports:
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- 5000:5000
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steps:
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- name: Checkout
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id: checkout
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uses: actions/checkout@v2
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- name: Set up QEMU
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id: qemu
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uses: docker/setup-qemu-action@v1
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with:
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image: tonistiigi/binfmt:latest
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platforms: ${{ matrix.platforms }}
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- name: Set up Docker Buildx
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id: buildx
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uses: docker/setup-buildx-action@v1
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with:
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config-inline: |
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[worker.oci]
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max-parallelism = 4
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driver-opts: network=host
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- name: Inspect builder
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run: |
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echo "Name: ${{ steps.buildx.outputs.name }}"
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echo "Endpoint: ${{ steps.buildx.outputs.endpoint }}"
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echo "Status: ${{ steps.buildx.outputs.status }}"
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echo "Flags: ${{ steps.buildx.outputs.flags }}"
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echo "Platforms: ${{ steps.buildx.outputs.platforms }}"
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- name: Build candidate
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id: build_candidate
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uses: docker/build-push-action@v2
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with:
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context: .
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file: Dockerfile
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platforms: ${{ matrix.platforms }}
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push: true
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tags: localhost:5000/golang-with-libgit2:latest
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- name: Inspect candidate
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run: |
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docker buildx imagetools inspect localhost:5000/golang-with-libgit2:latest
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- name: Test candidate
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run: |
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for digest in $(docker buildx imagetools inspect localhost:5000/golang-with-libgit2:latest --raw | jq -rc '.manifests[] | .digest')
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do
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IMG=localhost:5000/golang-with-libgit2 TAG=latest@$digest make test
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done

‎.gitignore‎

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build/

‎CMakeLists.txt‎

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cmake_minimum_required(VERSION 3.5.1)
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project(Superbuild)
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# Set a default build type if none was specified
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if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
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message(STATUS "Setting build type to 'Release' as none was specified.")
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set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
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set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
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"Debug" "Release" "MinSizeRel" "RelWithDebInfo")
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endif()
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option(BUILD_SHARED_LIBS "Build with shared libs." ON)
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option(USE_EXTERNAL_INSTALL "If enabled, install dependencies to CMAKE_INSTALL_PREFIX." OFF)
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mark_as_advanced(USE_EXTERNAL_INSTALL)
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include(ExternalProject)
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set_property(DIRECTORY PROPERTY EP_PREFIX ${Superbuild_BINARY_DIR})
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set(install_prefix ${Superbuild_BINARY_DIR}/install)
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if (USE_EXTERNAL_INSTALL)
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set(install_prefix ${CMAKE_INSTALL_PREFIX})
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else()
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mark_as_advanced(CMAKE_INSTALL_PREFIX)
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endif()
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#[[
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Default Cmake configuration flags.
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Ref: https://cmake.org/cmake/help/latest/manual/cmake-variables.7.html
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]]
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set(default_cmake_args
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"-DCMAKE_PREFIX_PATH:PATH=${install_prefix};${DRAKE_SUPERBUILD_PREFIX_PATH};${CMAKE_PREFIX_PATH}"
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"-DCMAKE_INSTALL_PREFIX:PATH=${install_prefix}"
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"-DCMAKE_FIND_ROOT_PATH:PATH=${install_prefix}"
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"-DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}"
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"-DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=ON"
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"-DBUILD_SHARED_LIBS:BOOL=${BUILD_SHARED_LIBS}"
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"-DENABLE_TESTING:BOOL=OFF"
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"-DENABLE_PROGRAMS:BOOL=OFF"
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"-DBUILD_DOCUMENTATION:BOOL=OFF"
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"-DBUILD_EXAMPLES:BOOL=OFF"
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"-DBUILD_TESTING:BOOL=OFF"
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"-DCMAKE_C_FLAGS:STRING=-fPIC"
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)
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#[[
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Build zlib-ng with zlib compatible API enabled.
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]]
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ExternalProject_Add(zlib
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URL https://github.com/zlib-ng/zlib-ng/archive/refs/tags/2.0.5.tar.gz
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URL_HASH SHA256=eca3fe72aea7036c31d00ca120493923c4d5b99fe02e6d3322f7c88dbdcd0085
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CMAKE_ARGS
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${default_cmake_args}
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#[[ Build with ZLIB compatible API ]]
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-DZLIB_COMPAT:BOOL=ON
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-DZLIB_ENABLE_TESTS:BOOL=OFF
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#[[ Required to ensure the current ${install_prefix} is always taken into account,
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as ${CMAKE_INSTALL_PREFIX} is cached persistently.
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Ref: https://github.com/zlib-ng/zlib-ng/blob/2.0.5/cmake/detect-install-dirs.cmake ]]
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-DBIN_INSTALL_DIR:PATH=${install_prefix}/bin
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-DLIB_INSTALL_DIR:PATH=${install_prefix}/lib
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-DINC_INSTALL_DIR:PATH=${install_prefix}/include
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-DPKGCONFIG_INSTALL_DIR:PATH=${install_prefix}/lib/pkgconfig
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)
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#[[
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mbedTLS does at present not support https://github.com/zlib-ng/zlib-ng/blob/2.0.5/cmake/detect-install-dirs.cmakeED25519, making it unsuitable for some SSH setups, and at present not a decent
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dependency option for libssh2.
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Target review of ED25519 support is Q3 2021.
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Ref: https://github.com/ARMmbed/mbedtls/issues/2452#issuecomment-802683144
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Ref: https://github.com/ARMmbed/mbedtls/pull/3245
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ExternalProject_Add(mbedtls
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URL https://github.com/ARMmbed/mbedtls/archive/refs/tags/v2.27.0.tar.gz
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URL_HASH SHA256=2a07856e541f0e5f6eaee4f78018c52f25bd244ed76f9020dea54a8b02cac6ea
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PATCH_COMMAND
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./scripts/config.pl set MBEDTLS_THREADING_C &&
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./scripts/config.pl set MBEDTLS_THREADING_PTHREAD &&
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./scripts/config.pl set MBEDTLS_MD4_C
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CMAKE_ARGS
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${default_cmake_args}
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-DUSE_SHARED_MBEDTLS_LIBRARY:BOOL=${BUILD_SHARED_LIBS}
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)
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]]
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#[[
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Build OpenSSL.
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OpenSSL does not publish any cmake directives, and we have to configure everything ourselves.
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Ref: https://github.com/openssl/openssl/blob/openssl-3.0.0/INSTALL.md
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]]
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set(default_openssl_args
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"--prefix=${install_prefix}"
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#[[ Path on the TARGET system where we expect the (certificate) configuration to live.
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The current allows to piggy back off Debian's ca-certificate package while maintaining our own OpenSSL version. ]]
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"--openssldir=/etc/ssl"
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#[[ Enforce the directory to ${install_prefix}/lib. As depending on the build system, Configure may otherwise choose
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to use /lib64. Which makes locating the libraries more difficult. ]]
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"--libdir=lib"
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"--with-zlib-include=${install_prefix}/include"
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"--with-zlib-lib=${install_prefix}/lib"
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"--release"
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"--banner=Configured"
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)
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if(NOT BUILD_SHARED_LIBS)
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list(APPEND default_openssl_args "no-shared")
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list(APPEND default_openssl_args "-static")
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endif()
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ExternalProject_Add(openssl
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DEPENDS zlib
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URL https://www.openssl.org/source/openssl-3.0.0.tar.gz
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URL_HASH SHA256=59eedfcb46c25214c9bd37ed6078297b4df01d012267fe9e9eee31f61bc70536
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CONFIGURE_COMMAND <SOURCE_DIR>/Configure ${default_openssl_args}
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BUILD_COMMAND make build_sw
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INSTALL_COMMAND make install_sw
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)
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#[[
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Build libssh2.
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At present with OpenSSL as a backend, see mbedTLS doc block for reasoning.
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]]
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set(default_libssh2_args
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"-DENABLE_ZLIB_COMPRESSION:BOOL=ON"
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"-DCRYPTO_BACKEND:STRING=OpenSSL"
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#[[ -DCRYPTO_BACKEND:STRING=mbedTLS ]]
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)
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if(NOT BUILD_SHARED_LIBS)
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list(APPEND default_libssh2_args "-DOPENSSL_USE_STATIC_LIBS:BOOL=TRUE")
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endif()
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ExternalProject_Add(libssh2
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DEPENDS zlib
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DEPENDS openssl
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URL https://github.com/libssh2/libssh2/archive/refs/tags/libssh2-1.10.0.tar.gz
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URL_HASH SHA256=31469ccfc71a5247c926e3f0938e122cbb7a7a4a1bdf1cf2d3121f78b558d261
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CMAKE_ARGS
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${default_cmake_args}
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${default_libssh2_args}
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)
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#[[
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Build libgit2 with the above dependencies, or explicit defined builtins.
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]]
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ExternalProject_Add(libgit2
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DEPENDS zlib
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DEPENDS openssl
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DEPENDS libssh2
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URL https://github.com/libgit2/libgit2/archive/109b4c887ffb63962c7017a66fc4a1f48becb48e.tar.gz
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URL_HASH SHA256=bc4ef7d6628d2248995bbd86ad77eb96376d683e7121779c7abde480928ae21a
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CMAKE_ARGS
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${default_cmake_args}
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-DBUILD_CLAR:BOOL:BOOL=OFF
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-DTHREADSAFE:BOOL=ON
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-DUSE_BUNDLED_ZLIB:BOOL=OFF
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-DUSE_HTTP_PARSER:STRING=builtin
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-DREGEX_BACKEND:STRING=builtin
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-DUSE_HTTPS:STRING=OpenSSL
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#[[ -DUSE_HTTPS:STRING=mbedTLS ]]
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)

‎Dockerfile‎

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FROM golang:1.16.8-bullseye as base
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# Install depedencies required to build
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RUN set -eux; \
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apt-get update \
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&& apt-get install -y --no-install-recommends \
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cmake \
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python3 \
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&& apt-get clean \
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&& apt-get autoremove --purge -y \
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&& rm -rf /var/lib/apt/lists/*
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# Copy libgit2 build directives and instructions into container
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ARG LIBGIT2_SRC_DIR
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ENV LIBGIT2_SRC_DIR=${LIBGIT2_SRC_DIR:-/libgit2}
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COPY CMakeLists.txt ${LIBGIT2_SRC_DIR}/CMakeLists.txt
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# Set right before build time to not invalidate previous cache layers.
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ARG LIBGIT2_DYNAMIC_ROOT_DIR
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ENV LIBGIT2_DYNAMIC_ROOT_DIR=${LIBGIT2_DYNAMIC_ROOT_DIR:-${LIBGIT2_SRC_DIR}/dynamic}
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ARG LIBGIT2_STATIC_ROOT_DIR
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ENV LIBGIT2_STATIC_ROOT_DIR=${LIBGIT2_STATIC_ROOT_DIR:-${LIBGIT2_SRC_DIR}/static}
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# Set default to single process
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ARG NPROC=1
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# Run the libgit2 and dependencies build.
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# Produce two sets (dynamic and static) of pre-compiled libraries in /libgit2/,
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# and remove the build directory itself to minimize image size.
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#
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# Note: you can still reproduce the build by making use of /libgit2/CMakeLists.txt.
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RUN set -eux; \
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build_dir=$(mktemp -d) \
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&& echo "=> Dynamic build" \
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&& cmake -S $LIBGIT2_SRC_DIR -B $build_dir \
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-DBUILD_SHARED_LIBS:BOOL=ON \
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-DUSE_EXTERNAL_INSTALL:BOOL=ON \
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-DCMAKE_INSTALL_PREFIX:PATH=$LIBGIT2_DYNAMIC_ROOT_DIR \
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&& cmake --build $build_dir -j $NPROC \
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&& echo "=> Static build" \
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&& cmake -S $LIBGIT2_SRC_DIR -B $build_dir \
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-DBUILD_SHARED_LIBS:BOOL=OFF \
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-DUSE_EXTERNAL_INSTALL:BOOL=ON \
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-DCMAKE_INSTALL_PREFIX:PATH=$LIBGIT2_STATIC_ROOT_DIR \
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&& cmake --build $build_dir -j $NPROC \
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&& rm -rf $build_dir

‎Dockerfile.test‎

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# This Docker image can be used to confirm the sets of dependencies can be used together with git2go.
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# Note: this just confirms the C library wiring is working, and no implementation details. It does not tell
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# for example, if ED25519 is supported by the underlying set of dependencies.
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ARG IMG
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ARG TAG
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FROM ${IMG}:${TAG} as base
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# Cache clone
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ARG GIT2GO_TAG
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RUN git clone --depth=1 --branch=${GIT2GO_TAG} https://github.com/libgit2/git2go /git2go \
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&& cd /git2go \
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&& go mod tidy
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# Set workdir
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WORKDIR /git2go

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