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#!/bin/bash

set -eu

scripts=$(dirname $0)
# shellcheck source=jenkins-helpers.sh
. $scripts/jenkins-helpers.sh

usage ()
{
    cat <<EOF
Usage: $0 --dir-abe ABE/SNAPSHOTS [--OPT true/false]
	This script generates source caches.
	"--OPT true/false" options specify what to do:
	--abe-branch <branch>		ABE branch to use; default "tested"
	--generate-abe true/false	Generate ABE snapshots; default "true"
	--generate-misc true/false	Generate misc repo and file caches; default "true"
	--update-abe-git true/false	Update ABE git repos; default "true"
	--verbose true/false		Be verbose; default "false"
EOF
    exit 1
}

convert_args_to_variables "$@"
obligatory_variables cache_dir
declare -g cache_dir

abe_branch="${abe_branch-tested}"
generate_abe="${generate_abe-true}"
generate_bmk="${generate_bmk-false}"
generate_misc="${generate_misc-true}"
update_abe_git="${update_abe_git-true}"
verbose="${verbose-false}"

if $verbose; then
    verbose="set -x"
else
    verbose="set +x"
fi

$verbose

# Checkout GNU tools into $cache_dir using ABE
generate_abe_snapshots ()
{
    set -e
    $verbose

    local abe_temp
    abe_temp="$(dirname "$0")/abe"

    rm -rf $abe_temp
    run_with_timeout_and_retry 10m 3 git clone --branch ${abe_branch} --depth 1 https://git-us.linaro.org/toolchain/abe $abe_temp

    cd $abe_temp
    ./configure --with-local-snapshots=$cache_dir

    if [ -e $HOME/.aberc ]; then
	echo "ERROR: $HOME/.aberc detected and it might override ABE's behavior"
	exit 1
    fi

    targets=(
	aarch64-linux-gnu
	aarch64-none-elf
	arm-linux-gnueabihf
	arm-none-eabi
	i686-linux-gnu
	x86_64-linux-gnu
    )

    for t in "${targets[@]}"; do
	for c in gcc5 gcc6 gcc7; do
	    ./abe.sh --target $t --extraconfigdir config/$c --retrieve all
	done
    done
}

# Checkout git repos
generate_git_cache ()
{
    set -e
    $verbose

    for repo in "$@"; do
	dir=$(basename $repo)
	dir=$cache_dir/$dir
	if [ ! -d $dir/.git ]; then
	    rm -rf $dir
	    run_with_timeout_and_retry 1h 3 git clone --no-checkout $repo $dir
	fi
    done
}

# Checkout bmk repos
generate_bmk_cache ()
{
    set -e
    $verbose

    # Clone the Linux kernel and LLVM monorepo.
    # Subsequent calls will update it.
    repos=(
	ssh://dev-private-git.linaro.org/restricted-benchmarks/CPU2000.git
	ssh://dev-private-git.linaro.org/restricted-benchmarks/CPU2006.git
	ssh://dev-private-git.linaro.org/restricted-benchmarks/CPU2017.git
    )
    generate_git_cache "${repos[@]}"
}

# Checkout other repos that we might need
generate_misc_files ()
{
    set -e
    $verbose

    # Distribute Foundation Model to the builders so that containers
    # running there can access Foundation Model via a bind-mount for
    # bare-metal testing.
    tar xf /home/tcwg-buildslave/public_html/infrastructure/FM000-KT-00035-r9p5-41rel0.tgz -C $cache_dir
    chmod -R ugo+rx $cache_dir/Foundation_Platformpkg

    # Clone the Linux kernel and LLVM monorepo.
    # Subsequent calls will update it.
    repos=(
	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
	https://github.com/llvm/llvm-project.git
	https://git.linaro.org/toolchain/jenkins-scripts.git
    )
    generate_git_cache "${repos[@]}"
}

update_git_repos () {
    set -e
    $verbose

    local dir="$1"
    while IFS= read -r -d '' repo_git
    do
    (
      local repo
      repo=$(dirname "$repo_git")
	    cd "$repo"
	    # Update and prune local clone
	    run_with_timeout_and_retry 1h 3 git remote update -p
	    find -maxdepth 1 ! -name .git ! -name . -print0 \
		    | xargs -0 rm -rf
    )
    done < <(find "$dir" -name .git -type d -print0)
}

if $generate_abe; then
    mkdir -p $cache_dir

    # Remove *.asc files to fix cached incorrect md5sum files
    rm -f $cache_dir/*.asc

    update_git_repos $cache_dir
    generate_abe_snapshots
fi

if $generate_bmk; then
    generate_bmk_cache
fi

if $generate_misc; then
    generate_misc_files
fi

if $update_abe_git; then
    update_git_repos $cache_dir
fi

echo "Snapshots status:"
du -hs $cache_dir/*