wordpress/build/tests-util/wp-patch-tests.sh

#!/usr/bin/env bash

# Register exit handler
trap scriptExitHandler EXIT

function scriptExitHandler() {
    LAST_EXIT_CODE=$?

    if [ -n "${WP_DL_TEMP_DIR}" ] && [ -d "${WP_DL_TEMP_DIR}" ]; then
        rm -rf "${WP_DL_TEMP_DIR:?}"
    fi

    if [ -n "${PHP_TESTS_TEMP_DIR}" ] && [ -d "${PHP_TESTS_TEMP_DIR}" ]; then
        rm -rf "${PHP_TESTS_TEMP_DIR:?}"
    fi

    if [ "${LAST_EXIT_CODE}" = "0" ]; then
        echo "> Script finished successfully"
        exit "${LAST_EXIT_CODE}"
    fi

    echo "> Script finished with an error"
    exit "${LAST_EXIT_CODE}"
}

set -e

PHP_TESTS_TEMP_DIR="$(mktemp -d -t XXXXXXXXXXX)"

function getFileCount() {
    ALL_DIRECTORIES=("${1:?Target dir is required}"/*)
    echo ${#ALL_DIRECTORIES[@]} # Sometimes, you just need a count
}

function taskPrepareWpPatch() {
    WP_DL_TEMP_DIR="$(mktemp -d -t XXXXXXXXXXX)"
    PATCH_DIR=${1:?}

    WP_WORK_LONG_VERSION="$(basename "${PATCH_DIR}")"
    WP_WORK_SHORT_VERSION="$(echo "${WP_WORK_LONG_VERSION:?}" | sed --expression='s/.0$//g')"
    wp --allow-root core download --locale="en_GB" --version="${WP_WORK_SHORT_VERSION}" --path="${WP_DL_TEMP_DIR}"

    echo "> Applying patch"
    patch "${WP_DL_TEMP_DIR}/wp-admin/update-core.php" <"${PATCH_DIR}/wp-admin-update-core.patch"
    mv -v "${WP_DL_TEMP_DIR}/wp-admin/update-core.php" "${PHP_TESTS_TEMP_DIR}/update-core-${WP_WORK_LONG_VERSION}.php"

    rm "${WP_DL_TEMP_DIR?}" -rf
}

# For each patch, download appropriate WP version, apply patch and check if file syntax is correct afterwards
for PATCH_DIR in patches/*/; do
    echo "> Deploying task ${PATCH_DIR}"

    # Introduce ~50ms overhead before deploying another task
    # Even shorter overhead helps. but better to be on safe side.
    # This should prevent concurrency issues
    sleep 0.05

    # Run task concurrently
    taskPrepareWpPatch "${PATCH_DIR}" &
done

echo "Waiting for all tasks to finish..."
wait

# Make sure that directory is not empty
if [ ! "$(ls -A "${PHP_TESTS_TEMP_DIR}")" ]; then
    echo "Error: Target directory is empty"
    exit 1
fi

NUMBER_OF_PATCHES="$(getFileCount patches)"
NUMBER_OF_TEST_FILES="$(getFileCount "${PHP_TESTS_TEMP_DIR}")"

if [ "${NUMBER_OF_PATCHES}" !=  "${NUMBER_OF_TEST_FILES}" ]; then
    echo "> Error - Unexpected number of files"
    echo "  Expected: ${NUMBER_OF_PATCHES}"
    echo "    Actual: ${NUMBER_OF_TEST_FILES}"
    exit 1
fi

# Run php-lint on resulting patch files
php-parallel-lint "${PHP_TESTS_TEMP_DIR}" -s --blame --exclude vendor -p php
exit $?