#!/bin/bashset -euxC target="$1"test -n "$target" # Arrange for the indirect `tzdata` dependency to be installed and configured# without prompting for the time zone. (Passing `-y` is not enough.)export DEBIAN_FRONTEND=noninteractive TZ=UTC # Install tools for setting up APT repositores. Install `apt-utils` before the# others, so the installation of `gnupg` can use it for debconf.apt-get updateapt-get install --no-install-recommends -y apt-utilsapt-get install --no-install-recommends -y apt-transport-https dpkg-dev gnupgtype dpkg-architecture  # Make sure we really have this. # Decide what architecture to use for `git`, shared libraries `git` links to,# and shared libraries gitoxide links to when building `max`. Instead of this# custom logic, we could use `$CROSS_DEB_ARCH`, which `cross` tries to provide# (https://github.com/cross-rs/cross/blob/v0.2.5/src/lib.rs#L268), and which is# available for roughly the same architectures where this logic gets a nonempty# value. But using `$CROSS_DEB_ARCH` may make it harder to build and test the# image manually. In particular, if it is not passed, we would conclude that we# should install the versions of those packages with the host's architecture.apt_suffix=if target_arch="$(dpkg-architecture --host-type "$target" --query DEB_HOST_ARCH)"then    dpkg --add-architecture "$target_arch"    apt_suffix=":$target_arch"    printf 'INFO: Using target architecture for `git` and libs in container.\n'    printf 'INFO: This architecture is %s.\n' "$target_arch"else    apt_suffix=''    printf 'WARNING: Using HOST architecture for `git` and libs in container.\n'fi # Get release codename. Like `lsb_release -sc`. (`lsb_release` may be absent.)release="$(sed -n 's/^VERSION_CODENAME=//p' /etc/os-release)" # Add the git-core PPA manually. (Faster than installing `add-apt-repository`.)echo "deb https://ppa.launchpadcontent.net/git-core/ppa/ubuntu $release main" \    >/etc/apt/sources.list.d/git-core-ubuntu-ppa.listapt-key adv --keyserver keyserver.ubuntu.com \    --recv-keys F911AB184317630C59970973E363C90F8F1B6217apt-get update # Remove the old `git` and associated packages.apt-get purge --autoremove -y git # Git dependencies. These are for the desired architecture, except `git-man` is# the same package for all architectures, and we can't always install `perl` or# `liberror-perl` for the desired architecture (at least in s390x).# TODO(maint): Resolve these dynamically to support future `cross` base images.git_deps=(    git-man    "libc6$apt_suffix"    "libcurl3-gnutls$apt_suffix"    "libexpat1$apt_suffix"    liberror-perl    "libpcre2-8-0$apt_suffix"    "zlib1g$apt_suffix"    perl) # Other dependencies for running the gitoxide test suite and fixture scripts,# and for building and testing gitoxide for feature sets beyond `max-pure`.gix_test_deps=(    ca-certificates    cmake    "curl$apt_suffix"    jq    "libc-dev$apt_suffix"    "libssl-dev$apt_suffix"    patch    pkgconf) if test -n "$apt_suffix"; then    # Install everything we need except `git` (and what we already have). We    # can't necessarily install `git` this way, because it insists on `perl`    # and `liberror-perl` dependencies of the same architecture as it. These    # may not be possible to install in a mixed environment, where most    # packages are a different architecture, and where `perl` is a dependency    # of other important packages. So we will install everything else first    # (then manually add `git`).    apt-get install --no-install-recommends -y \        "${git_deps[@]}" "${gix_test_deps[@]}" file     # Add `git` by manually downloading it and installing it with `dpkg`,    # forcing installation to proceed even if its `perl` and `liberror-perl`    # dependencies, as declared by `git`, are absent. (We have already    # installed them, but in a possibly different architecture. `git` can still    # use them, because its use is to run scripts, rather than to link to a    # shared library they provide.) It is preferred to let `apt-get download`    # drop privileges to the `_apt` user during download, so we download it    # inside `/tmp`. But we create a subdirectory so it is safe to make    # assumptions about what files globs can expand to, even if `/tmp` is    # mounted to an outside share temp dir on a multi-user system.    mkdir /tmp/dl  # Don't use `-p`; if it exists already, we cannot trust it.    chown _apt /tmp/dl  # Use owner, as the container may have no `_apt` group.    (cd /tmp/dl && apt-get download "git$apt_suffix")    dpkg --ignore-depends="perl$apt_suffix,liberror-perl$apt_suffix" \        -i /tmp/dl/git[-_]*.deb    rm -r /tmp/dlelse    # Install everything we need, including `git`.    apt-get install --no-install-recommends -y git "${gix_test_deps[@]}" filefi # Show information about the newly installed `git` (and ensure it can run).git version --build-optionsgit="$(command -v git)"file -- "$git" # Clean up files related to package management that we won't need anymore.apt-get cleanrm -rf /var/lib/apt/lists/* # If this image has a runner script `cross` uses for Android, patch the script# to add the ability to suppress its customization of `LD_PRELOAD`. The runner# script sets `LD_PRELOAD` to the path of `libc++_shared.so` in the Android NDK# (https://github.com/cross-rs/cross/blob/v0.2.5/docker/android-runner#L34).# But this causes a problem for us. When a host-architecture program is run,# `ld.so` shows a message about the "wrong ELF class". Such programs can still# run, but when we rely on their specific output to stderr, fixtures and tests# fail. The change we make here lets us set `NO_PRELOAD_CXX=1` to avoid that.runner=/android-runnerpatch='s/^[[:blank:]]*export LD_PRELOAD=/test "${NO_PRELOAD_CXX:-0}" != 0 || &/'if test -f "$runner"; then sed -i.orig "$patch" -- "$runner"; fi # Ensure a nonempty Git `system` scope (for the `installation_config` tests).git config --system gitoxide.imaginary.arbitraryVariable arbitraryValue