Add new conditional deploy action that only runs on the master branch

build

@@ -33,6 +33,13 @@ database_name="aq_db";
 # Minimum major version of npm
 min_npm_version_major="6";
 
+# Deployment settings
+deploy_ssh_user="ci";
+deploy_ssh_host="www.connectedhumber.org";
+deploy_ssh_port="22";
+
+deploy_root_dir="Air-Quality-Web";
+
 ###############################################################################
 
 # Check out the lantern git submodule if needed
@@ -264,6 +271,12 @@ task_docs() {
 task_ci() {
 	tasks_run setup setup-dev
 	NODE_ENV="production" tasks_run client docs archive;
+	
+	if [ "${GIT_REF_NAME}" == "refs/heads/master" ]; then
+		tasks_run deploy;
+	else
+		echo "Not deploying, as this build wasn't on the master branch.";
+	fi
 }
 
 task_archive() {
@@ -272,6 +285,65 @@ task_archive() {
 }
 
 
+task_deploy() {
+	stage_begin "Deploying to ${deploy_ssh_host}....";
+	if [ "${SSH_KEY_PATH}" == "" ]; then
+		stage_end 1 "Error: Can't find the SSH key as the environment variable SSH_KEY_PATH isn't set.";
+	fi
+	
+	task_begin "Preparing upload";
+	
+	subtask_begin "Creating temporary directory";
+	temp_dir="$(mktemp -d --suffix "-rhinoreminds-upload")";
+	subtask_end $? "Error: Failed to create temporary directory";
+	
+	subtask_begin "Unpacking release files";
+	execute tar -xf "${ARCHIVE}/Air-Quality-Web.tar.gz" -C "${temp_dir}";
+	subtask_end $? "Failed to unpack release files";
+	
+	# Define the directory whose contents we want to upload
+	source_upload_dir="${temp_dir}/RhinoReminds-Release";
+	
+	task_end $?;
+	
+	task_begin "Uploading release";
+	
+	# Acquire an exclusive project-wide lock so that we only upload stuff one-at-a-time
+	exec 9<"${WORKSPACE}";
+	flock --exclusive 9;
+	# We have an extra : before the @ here to avoid the password prompt
+	
+	# Actions:
+	# 1. Connect to remote server
+	# 2. Upload new files
+	# 3. Create data dir symlink
+	# 4. Swap in new directory
+	# 5. Delete old directory
+	lftp << SFTPCOMMANDS
+set connect-program 'ssh -x -i "${SSH_KEY_PATH}" -P "${deploy_ssh_port}" -o "PasswordAuthentication=no"';
+connect sftp://${deploy_ssh_user}:@${deploy_ssh_host};
+
+mirror -R -P 3 -r ${source_upload_dir}/* "${deploy_root_dir}/www-new";
+ln -s "${deploy_root_dir}/data" "${deploy_root_dir}/www-new/data";
+
+mv "${deploy_root_dir}/www" "${deploy_root_dir}/www-old";
+mv "${deploy_root_dir}/www-new" "${deploy_root_dir}/www";
+rm -r "${deploy_root_dir}/www-old";
+bye
+SFTPCOMMANDS
+
+	exec 9>&- # Close file descriptor 9 and release the lock
+	
+	task_end $? "Failed to upload release";
+	
+	task_begin "Cleaning up";
+	execute rm -r "${temp_dir}";
+	task_end $?;
+	
+	stage_end $? "Failed to deploy to ${deploy_ssh_host}.";
+}
+
+
 #########################################################################
 
 tasks_run $@;