# Integrating docker-based test servers into Qt Test framework
#
# This file adds support for docker-based test servers built by testcase
# projects that need them. To enable this feature, any automated test can
# include testserver.pri in its project file. This instructs qmake to insert
# additional targets into the generated Makefile. The 'check' target then brings
# up test servers before running the testcase, and shuts them down afterwards.
#
# TESTSERVER_COMPOSE_FILE
# - Contains the path of docker-compose file
# This configuration file defines the services used for autotests. It tells the
# docker engine how to build up the docker images and containers. In qtbase, a
# shared docker-compose file is located in the tests folder.
# Example: TESTSERVER_COMPOSE_FILE = \
#              $$dirname(_QMAKE_CONF_)/tests/testserver/docker-compose.yml
#
# The user must run the provisioning scripts in advance before attempting to
# build the test servers. The docker_testserver.sh script is used to build up
# the docker images into the docker-cache. It handles the immutable parts of the
# server installation that rarely need adjustment, such as downloading packages.
# Example: qt5/coin/provisioning/.../testserver/docker_testserver.sh
#
# QT_TEST_SERVER_LIST
# - A list of test servers to bring up for this testcase
# These test servers should be defined in $$TESTSERVER_COMPOSE_FILE. Each
# testcase can define the test servers it depends on.
# Example: QT_TEST_SERVER_LIST = apache2 squid vsftpd ftp-proxy danted
#
# Pre-processor defines needed for the application:
# QT_TEST_SERVER
# - A preprocessor macro used for testcase to change testing parameters at
#   compile time
# This macro is predefined for docker-based test servers and is passed as a
# compiler option (-DQT_TEST_SERVER). The testcase can then check whether
# docker-based servers are in use and change the testing parameters, such as
# host name or port number, at compile time. An example can be found in
# network-settings.h.
#
# Example:
# #if defined(QT_TEST_SERVER)
#     Change the testing parameters at compile time
# #endif
#
# QT_TEST_SERVER_DOMAIN
# - A preprocessor macro that holds the server domain name
# Provided for the helper functions in network-settings.h. Use function
# serverDomainName() in your application instead.
#
# Additional make targets:
# 1. check_network - A renamed target from the check target of testcase feature.
# 2. testserver_clean - Clean up server containers/images and tidy away related
#    files.

# The docker test server should only be integrated in the leaf Makefile.
# If debug_and_release option is in use, skip the meta-Makefile except for
# Makefile.Debug and Makefile.Release.
debug_and_release:!build_pass: return()

TESTSERVER_VERSION = $$system(docker-compose --version)

isEmpty(TESTSERVER_VERSION) {
    # Make check with server "qt-test-server.qt-test-net" as a fallback
} else {
    # Make check with docker test servers
    equals(QMAKE_HOST.os, Linux) {
        # For the platform supporting docker bridge network, each container is
        # assigned a unique hostname and connected to the same network domain
        # to communicate with the others.
        DEFINES += QT_TEST_SERVER_NAME
        DNSDOMAIN = test-net.qt.local
    } else {
        # For the others, the containers are deployed into a virtual machine
        # using the host network. All the containers share the same hostname of
        # the virtual machine, and they are connected to the same network domain.
        # NOTE: In Windows, Apple Bonjour only works within a single local domain.
        DNSDOMAIN = local
    }

    equals(QMAKE_HOST.os, Darwin) {
        # There is no docker bridge on macOS. It is impossible to ping a container.
        # Docker docs recommends using port mapping to connect to a container;
        # but it causes a port conflict if the user is running a service that
        # binds the same port on the host. An alternative solution is to deploy
        # the docker environment into VirtualBox using docker-machine.
        TESTSERVER_COMPOSE_FILE = \
            $$dirname(_QMAKE_CONF_)/tests/testserver/docker-compose-for-macOS.yml

        # The connection configuration for the target machine
        MACHINE_CONFIG = $(shell docker-machine config qt-test-server)

        # The environment variables passed to the docker-compose file
        TEST_ENV = 'MACHINE_IP=$(shell docker-machine ip qt-test-server)'
        TEST_ENV += 'TEST_DOMAIN=$$DNSDOMAIN'
        TEST_CMD = env
    } else:equals(QMAKE_HOST.os, Windows) {
        # There is no docker bridge on Windows. It is impossible to ping a container.
        # Use docker-machine to deploy the docker environment into VirtualBox.
        TESTSERVER_COMPOSE_FILE = \
            $$dirname(_QMAKE_CONF_)/tests/testserver/docker-compose-for-windows.yml

        # The connection configuration for the target machine
        MACHINE_CONFIG = (docker-machine config qt-test-server)

        # The environment variables passed to the docker-compose file
        TEST_ENV = '\$\$env:MACHINE_IP = docker-machine ip qt-test-server;'
        TEST_ENV += '\$\$env:TEST_DOMAIN = $$shell_quote(\"$$DNSDOMAIN\");'

        # Docker-compose CLI environment variables:
        # Enable path conversion from Windows-style to Unix-style in volume definitions.
        TEST_ENV += '\$\$env:COMPOSE_CONVERT_WINDOWS_PATHS = $$shell_quote(\"true\");'

        TEST_CMD = 'PowerShell -noprofile'
        CONFIG += PowerShell
    } else {
        TESTSERVER_COMPOSE_FILE = $$dirname(_QMAKE_CONF_)/tests/testserver/docker-compose.yml

        # The environment variables passed to the docker-compose file
        TEST_ENV = 'TEST_DOMAIN=$$DNSDOMAIN'
        TEST_CMD = env
    }

    # The domain name is relevant to https keycert (qnetworkreply/crts/qt-test-net-cacert.pem).
    DEFINES += QT_TEST_SERVER QT_TEST_SERVER_DOMAIN=$$shell_quote(\"$${DNSDOMAIN}\")

    # Ensure that the docker-compose file is provided. It is a configuration
    # file which is mandatory for all docker-compose commands. You can get more
    # detail from the description of TESTSERVER_COMPOSE_FILE above. There is
    # also an example showing how to configure it manually.
    FILE_PRETEST_MSG = "Project variable 'TESTSERVER_COMPOSE_FILE' is not set"
    PowerShell {
        testserver_pretest.commands = echo $$TESTSERVER_VERSION &&
        testserver_pretest.commands += \
            $$TEST_CMD if ([String]::IsNullOrEmpty($$shell_quote(\"$$TESTSERVER_COMPOSE_FILE\"))) \
                {Write-Error $$shell_quote(\"$$FILE_PRETEST_MSG\")} &&
    } else {
        testserver_pretest.commands = $(info "testserver:" $$TESTSERVER_VERSION)
        testserver_pretest.commands += $(if $$TESTSERVER_COMPOSE_FILE,,$(error $$FILE_PRETEST_MSG))
    }

    # Make sure docker-machine is both created and running. The docker_machine
    # script is used to deploy the docker environment into VirtualBox.
    # Example: qt5/coin/provisioning/common/shared/testserver/docker_machine.sh
    !isEmpty(MACHINE_CONFIG) {
        MACHINE_LIST_CMD = docker-machine ls -q --filter "Name=^qt-test-server\$\$"
        MACHINE_LIST_MSG = "Docker machine qt-test-server not found"
        PowerShell {
            testserver_pretest.commands += $$TEST_CMD if (!($$MACHINE_LIST_CMD)) \
                {Write-Error $$shell_quote(\"$$MACHINE_LIST_MSG\")} &&
        } else {
            testserver_pretest.commands += \
                $(if $(shell $$MACHINE_LIST_CMD),,$(error $$MACHINE_LIST_MSG))
        }

        MACHINE_STATE_CMD = \
            docker-machine ls -q --filter "State=Running" --filter "Name=^qt-test-server\$\$"
        MACHINE_START_CMD = docker-machine start qt-test-server
        PowerShell {
            testserver_pretest.commands += \
                $$TEST_CMD if (!($$MACHINE_STATE_CMD)) {$$MACHINE_START_CMD} &&
        } else {
            testserver_pretest.commands += \
                $(if $(shell $$MACHINE_STATE_CMD),,$(shell $$MACHINE_START_CMD > /dev/null))
        }
    }

    # Before starting the test servers, it requires the user to run the setup
    # script (coin/provisioning/.../testserver/docker_testserver.sh) in advance.
    IMAGE_PRETEST_CMD = docker $$MACHINE_CONFIG images -aq "qt-test-server-*"
    IMAGE_PRETEST_MSG = "Docker image qt-test-server-* not found"
    PowerShell {
        testserver_pretest.commands += $$TEST_CMD if (!($$IMAGE_PRETEST_CMD)) \
            {Write-Error $$shell_quote(\"$$IMAGE_PRETEST_MSG\")}
    } else {
        testserver_pretest.commands += \
            $(if $(shell $$IMAGE_PRETEST_CMD),,$(error $$IMAGE_PRETEST_MSG))
    }

    # Rename the check target of testcase feature
    check.target = check_network
    testserver_test.target = check

    # Pretesting test servers environment
    testserver_test.depends = testserver_pretest

    # Bring up test servers and make sure the services are ready.
    !isEmpty(TEST_CMD): testserver_test.commands = $$TEST_CMD $$TEST_ENV
    testserver_test.commands += docker-compose $$MACHINE_CONFIG -f $$TESTSERVER_COMPOSE_FILE up \
                                --detach --force-recreate --timeout 1 $${QT_TEST_SERVER_LIST} &&

    # Check test cases with docker-based test servers.
    testserver_test.commands += $(MAKE) -f $(MAKEFILE) check_network &&

    # Stop and remove test servers after testing.
    !isEmpty(TEST_CMD): testserver_test.commands += $$TEST_CMD $$TEST_ENV
    testserver_test.commands += docker-compose $$MACHINE_CONFIG -f $$TESTSERVER_COMPOSE_FILE down \
                                --timeout 1

    # Destroy test servers and tidy away related files.
    testserver_clean.commands = docker-compose $$MACHINE_CONFIG -f $$TESTSERVER_COMPOSE_FILE down \
                                --rmi all

    QMAKE_EXTRA_TARGETS += testserver_pretest testserver_test testserver_clean
}