#!/bin/bash

# This script will look for git recipes in our own layers and
# automatically check if there are new upstream commit in order
# to update the SRCREV entry in the recipe.
#
# For it to work properly, UPSTREAM_CHECK_COMMITS = "1" must be set
# in your local.conf (see our template)
#
# This script does not commit anything, please review the changes
# before committing and pushing.

set -euo pipefail


ABSOLUTE_PATH="$(readlink -f "$0")"
SCRIPTS_DIR=$(dirname "${ABSOLUTE_PATH}")
YOCTO_DIR=$(readlink -f "${SCRIPTS_DIR}/../")


updatable_recipes=()
updatable_packages=()

get_updatable_recipes()
{
    all_recipes=$(find "${YOCTO_DIR}"/layers -name "*.bb")
    for recipe in ${all_recipes}; do
        if grep -q SRCREV "${recipe}"; then
            updatable_recipes+=("${recipe}")
        fi
    done
}

convert_recipes_to_package_names()
{
    for file in "${updatable_recipes[@]}"; do
        filename=$(basename "${file}")
        package_name=${filename/_git\.bb/}
        updatable_packages+=("${package_name}")
    done
}

get_new_commit_lines()
{
    # Load build environment (disable flags to avoid problems while sourcing
    set +eu
    export BB_ENV_PASSTHROUGH_ADDITIONS="UPSTREAM_CHECK_COMMITS"
    export MACHINE=netmodule-hw20
    export UPSTREAM_CHECK_COMMITS="1"
    # shellcheck source=/dev/null
    source "${YOCTO_DIR}"/nwl-init-build-env >/dev/null
    set -eu

    # the relevant output  is on stderr
    if ! upgrade_status=$(devtool check-upgrade-status "${updatable_packages[@]}" 2>&1 >/dev/null);
    then
        echo "devtool failed"
        exit 1
    fi

    if ! new_commit_lines=$(grep "new commits" <<< "${upgrade_status}")
    then
        echo "Nothing to update"
        exit 0
    fi
}

get_bbfile_from_package()
{
    package="${1}"
    for file in "${updatable_recipes[@]}"; do
        # The grepped output will be used by caller
        if grep "${package}" <<< "${file}"; then
            return
        fi
    done
}


get_updatable_recipes
#echo -e "Found bbfiles: \n" "${updatable_recipes[@]}\n"

convert_recipes_to_package_names
echo -e "Looking for updates for these packages: \n" "${updatable_packages[@]}" "\n"

get_new_commit_lines
echo -e "New commits: \n${new_commit_lines}\n"

echo "Starting to update files"
IFS=$'\n' # Read line by line instead of word by word
for line in ${new_commit_lines}; do
    # Get package name (2nd word of the line)
    package_name=$(cut -d " " -f 2 <<< "${line}")
    # Convert to recipe filename
    bbfile=$(get_bbfile_from_package "${package_name}")
    relative_bbfile_path=$(realpath --relative-to="${YOCTO_DIR}" "${bbfile}")

    # The commit is the last word of the line
    newrev=$(grep --only-matching --extended-regexp '[^ ]+\s?$' <<< "${line}")
    newrev=$(tr -d " " <<< "${newrev}")

    echo "Updating ${relative_bbfile_path}"
    echo "To ${newrev}"
    echo
    sed -i "s/^SRCREV.*/SRCREV = \"${newrev}\"/g" "${bbfile}"
done

exit 0