Add helper script to run integration tests on a Docker container

Copied and adjusted from "tests/integration/run-docker.sh" in Talk; see
its commit history for further reference.

Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>

build/integration/run-docker.sh

+#!/usr/bin/env bash
+
+# @copyright Copyright (c) 2017, Daniel Calviño Sánchez (danxuliu@gmail.com)
+# @copyright Copyright (c) 2018, Daniel Calviño Sánchez (danxuliu@gmail.com)
+#
+# @license GNU AGPL version 3 or any later version
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Helper script to run the integration tests on a fresh Nextcloud server through
+# Docker.
+#
+# The integration tests are run in its own Docker container; the grandparent
+# directory of the integration tests directory (that is, the root directory of
+# the Nextcloud server) is copied to the container and the integration tests are
+# run inside it; in the container the configuration/data from the original
+# Nextcloud server is ignored, and a new server installation is performed inside
+# the container instead. Once the tests end the container is stopped.
+#
+# To perform its job, the script requires the "docker" command to be available.
+#
+# The Docker Command Line Interface (the "docker" command) requires special
+# permissions to talk to the Docker daemon, and those permissions are typically
+# available only to the root user. Please see the Docker documentation to find
+# out how to give access to a regular user to the Docker daemon:
+# https://docs.docker.com/engine/installation/linux/linux-postinstall/
+#
+# Note, however, that being able to communicate with the Docker daemon is the
+# same as being able to get root privileges for the system. Therefore, you must
+# give access to the Docker daemon (and thus run this script as) ONLY to trusted
+# and secure users:
+# https://docs.docker.com/engine/security/security/#docker-daemon-attack-surface
+#
+# Finally, take into account that this script will automatically remove the
+# Docker containers named "database-nextcloud-local-test-integration" and
+# "nextcloud-local-test-integration", even if the script did not create them
+# (probably you will not have containers nor images with that name, but just in
+# case).
+
+# Sets the variables that abstract the differences in command names and options
+# between operating systems.
+#
+# Switches between mktemp on GNU/Linux and gmktemp on macOS.
+function setOperatingSystemAbstractionVariables() {
+	case "$OSTYPE" in
+		darwin*)
+			if [ "$(which gtimeout)" == "" ]; then
+				echo "Please install coreutils (brew install coreutils)"
+				exit 1
+			fi
+
+			MKTEMP=gmktemp
+			TIMEOUT=gtimeout
+			;;
+		linux*)
+			MKTEMP=mktemp
+			TIMEOUT=timeout
+			;;
+		*)
+			echo "Operating system ($OSTYPE) not supported"
+			exit 1
+			;;
+	esac
+}
+
+# Launches the database server in a Docker container.
+#
+# No server is started if "SQLite" is being used; in other cases the database
+# is set up as needed and generic "$DATABASE_NAME/USER/PASSWORD" variables
+# (independent of the database type) are set to be used when installing the
+# Nextcloud server.
+#
+# The Docker container started here will be automatically stopped when the
+# script exits (see cleanUp). If the database server can not be started then the
+# script will be exited immediately with an error state.
+function prepareDatabase() {
+	if [ "$DATABASE" = "sqlite" ]; then
+		return
+	fi
+
+	DATABASE_CONTAINER=database-nextcloud-local-test-integration
+
+	DATABASE_NAME=oc_autotest
+	DATABASE_USER=oc_autotest
+	DATABASE_PASSWORD=nextcloud
+
+	DATABASE_CONTAINER_OPTIONS="--env MYSQL_ROOT_PASSWORD=nextcloud_root --env MYSQL_USER=$DATABASE_USER --env MYSQL_PASSWORD=$DATABASE_PASSWORD --env MYSQL_DATABASE=$DATABASE_NAME"
+	if [ "$DATABASE" = "pgsql" ]; then
+		DATABASE_CONTAINER_OPTIONS=" --env POSTGRES_USER=$DATABASE_USER --env POSTGRES_PASSWORD=$DATABASE_PASSWORD --env POSTGRES_DB=${DATABASE_NAME}_dummy"
+	fi
+
+	echo "Starting database server"
+	docker run --detach --name=$DATABASE_CONTAINER $DATABASE_CONTAINER_OPTIONS $DATABASE_IMAGE
+
+	DATABASE_IP=$(docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $DATABASE_CONTAINER)
+
+	DATABASE_PORT=3306
+	if [ "$DATABASE" = "pgsql" ]; then
+		DATABASE_PORT=5432
+	fi
+
+	echo "Waiting for database server to be ready"
+	if ! $TIMEOUT 600s bash -c "while ! (</dev/tcp/$DATABASE_IP/$DATABASE_PORT) >/dev/null 2>&1; do sleep 1; done"; then
+		echo "Could not start database server after 600 seconds" >&2
+
+		exit 1
+	fi
+}
+
+# Creates a Docker container to run the integration tests.
+#
+# This function starts a Docker container with a copy of the Nextcloud code from
+# the grandparent directory, although ignoring any configuration or data that it
+# may provide (for example, if that directory was used directly to deploy a
+# Nextcloud instance in a web server). As the Nextcloud code is copied to the
+# container instead of referenced the original code can be modified while the
+# integration tests are running without interfering in them.
+function prepareDocker() {
+	NEXTCLOUD_LOCAL_CONTAINER=nextcloud-local-test-integration
+
+	NEXTCLOUD_LOCAL_CONTAINER_NETWORK_OPTIONS=""
+	if [ -n "$DATABASE_CONTAINER" ]; then
+		# The network stack is shared between the database and the Nextcloud
+		# container, so the Nextcloud server can access the database directly on
+		# 127.0.0.1.
+		NEXTCLOUD_LOCAL_CONTAINER_NETWORK_OPTIONS="--network=container:$DATABASE_CONTAINER"
+	fi
+
+	echo "Starting the Nextcloud container"
+	# When using "nextcloudci/phpX.Y" images the container exits immediately if
+	# no command is given, so a Bash session is created to prevent that.
+	docker run --detach --name=$NEXTCLOUD_LOCAL_CONTAINER $NEXTCLOUD_LOCAL_CONTAINER_NETWORK_OPTIONS --interactive --tty $NEXTCLOUD_LOCAL_IMAGE bash
+
+	# Use the $TMPDIR or, if not set, fall back to /tmp.
+	NEXTCLOUD_LOCAL_TAR="$($MKTEMP --tmpdir="${TMPDIR:-/tmp}" --suffix=.tar nextcloud-local-XXXXXXXXXX)"
+
+	# Setting the user and group of files in the tar would be superfluous, as
+	# "docker cp" does not take them into account (the extracted files are set
+	# to root).
+	echo "Copying local Git working directory of Nextcloud to the container"
+	tar --create --file="$NEXTCLOUD_LOCAL_TAR" \
+		--exclude=".git" \
+		--exclude="./config/config.php" \
+		--exclude="./data" \
+		--exclude="./data-autotest" \
+		--exclude="./tests" \
+		--exclude="node_modules" \
+		--directory=../../ \
+		.
+
+	docker exec $NEXTCLOUD_LOCAL_CONTAINER mkdir /nextcloud
+	docker cp - $NEXTCLOUD_LOCAL_CONTAINER:/nextcloud/ < "$NEXTCLOUD_LOCAL_TAR"
+
+	# Database options are needed only when a database other than SQLite is
+	# used.
+	NEXTCLOUD_LOCAL_CONTAINER_INSTALL_DATABASE_OPTIONS=""
+	if [ -n "$DATABASE_CONTAINER" ]; then
+		NEXTCLOUD_LOCAL_CONTAINER_INSTALL_DATABASE_OPTIONS="--database=$DATABASE --database-name=$DATABASE_NAME --database-user=$DATABASE_USER --database-pass=$DATABASE_PASSWORD --database-host=127.0.0.1"
+	fi
+
+	echo "Installing Nextcloud in the container"
+	docker exec $NEXTCLOUD_LOCAL_CONTAINER bash -c "cd nextcloud && php occ maintenance:install --admin-pass=admin $NEXTCLOUD_LOCAL_CONTAINER_INSTALL_DATABASE_OPTIONS"
+}
+
+# Removes/stops temporal elements created/started by this script.
+function cleanUp() {
+	# Disable (yes, "+" disables) exiting immediately on errors to ensure that
+	# all the cleanup commands are executed (well, no errors should occur during
+	# the cleanup anyway, but just in case).
+	set +o errexit
+
+	echo "Cleaning up"
+
+	if [ -f "$NEXTCLOUD_LOCAL_TAR" ]; then
+		echo "Removing $NEXTCLOUD_LOCAL_TAR"
+	    rm $NEXTCLOUD_LOCAL_TAR
+	fi
+
+	# The name filter must be specified as "^/XXX$" to get an exact match; using
+	# just "XXX" would match every name that contained "XXX".
+	if [ -n "$(docker ps --all --quiet --filter name="^/$NEXTCLOUD_LOCAL_CONTAINER$")" ]; then
+		echo "Removing Docker container $NEXTCLOUD_LOCAL_CONTAINER"
+		docker rm --volumes --force $NEXTCLOUD_LOCAL_CONTAINER
+	fi
+
+	if [ -n "$DATABASE_CONTAINER" -a -n "$(docker ps --all --quiet --filter name="^/$DATABASE_CONTAINER$")" ]; then
+		echo "Removing Docker container $DATABASE_CONTAINER"
+		docker rm --volumes --force $DATABASE_CONTAINER
+	fi
+}
+
+# Exit immediately on errors.
+set -o errexit
+
+# Execute cleanUp when the script exits, either normally or due to an error.
+trap cleanUp EXIT
+
+# Ensure working directory is script directory, as some actions (like copying
+# the Git working directory to the container) expect that.
+cd "$(dirname $0)"
+
+# "--image XXX" option can be provided to set the Docker image to use to run
+# the integration tests (one of the "nextcloudci/phpX.Y:phpX.Y-Z" images).
+NEXTCLOUD_LOCAL_IMAGE="nextcloudci/php7.1:php7.1-15"
+if [ "$1" = "--image" ]; then
+	NEXTCLOUD_LOCAL_IMAGE=$2
+
+	shift 2
+fi
+
+# "--database XXX" option can be provided to set the database to use to run the
+# integration tests (one of "sqlite", "mysql" or "pgsql"; "sqlite" is used
+# by default).
+DATABASE="sqlite"
+if [ "$1" = "--database" ]; then
+	DATABASE=$2
+
+	shift 2
+fi
+
+if [ "$DATABASE" != "sqlite" ] && [ "$DATABASE" != "mysql" ] && [ "$DATABASE" != "pgsql" ]; then
+	echo "--database must be followed by one of: sqlite, mysql or pgsql"
+
+	exit 1
+fi
+
+# "--database-image XXX" option can be provided to set the Docker image to use
+# for the database container (ignored when using "sqlite").
+if [ "$DATABASE" = "mysql" ]; then
+	DATABASE_IMAGE="mysql:5.7"
+elif [ "$DATABASE" = "pgsql" ]; then
+	DATABASE_IMAGE="postgres:10"
+fi
+if [ "$1" = "--database-image" ]; then
+	DATABASE_IMAGE=$2
+
+	shift 2
+fi
+
+# If no parameter is provided to this script all the integration tests are run.
+SCENARIO_TO_RUN=$1
+
+setOperatingSystemAbstractionVariables
+
+prepareDatabase
+prepareDocker
+
+echo "Running tests"
+# --tty is needed to get colourful output.
+docker exec --tty $NEXTCLOUD_LOCAL_CONTAINER bash -c "cd nextcloud/build/integration && ./run.sh $SCENARIO_TO_RUN"