# Start (or other actions) a service, print a log in case of failure and optionnaly wait until the service is completely started # # usage: ynh_systemd_action [-n service_name] [-a action] [ [-l "line to match"] [-p log_path] [-t timeout] [-e length] ] # | arg: -n, --service_name= - Name of the service to reload. Default : $app # | arg: -a, --action= - Action to perform with systemctl. Default: start # | arg: -l, --line_match= - Line to match - The line to find in the log to attest the service have finished to boot. # If not defined it don't wait until the service is completely started. # | arg: -p, --log_path= - Log file - Path to the log file. Default : /var/log/$app/$app.log # | arg: -t, --timeout= - Timeout - The maximum time to wait before ending the watching. Default : 300 seconds. # | arg: -e, --length= - Length of the error log : Default : 20 ynh_systemd_action() { # Declare an array to define the options of this helper. declare -Ar args_array=( [n]=service_name= [a]=action= [l]=line_match= [p]=log_path= [t]=timeout= [e]=length= ) local service_name local action local line_match local length local log_path local timeout # Manage arguments with getopts ynh_handle_getopts_args "$@" local service_name="${service_name:-$app}" local action=${action:-start} local log_path="${log_path:-/var/log/$service_name/$service_name.log}" local length=${length:-20} local timeout=${timeout:-300} # Start to read the log if [[ -n "${line_match:-}" ]] then local templog="$(mktemp)" # Following the starting of the app in its log if [ "$log_path" == "systemd" ] ; then # Read the systemd journal journalctl --unit=$service_name --follow --since=-0 --quiet > "$templog" & else # Read the specified log file tail -F -n0 "$log_path" > "$templog" & fi # Get the PID of the tail command local pid_tail=$! fi echo "${action^} the service $service_name" >&2 systemctl $action $service_name \ || ( journalctl --lines=$length -u $service_name >&2 \ ; test -e "$log_path" && echo "--" && tail --lines=$length "$log_path" >&2 \ ; false ) # Start the timeout and try to find line_match if [[ -n "${line_match:-}" ]] then local i=0 for i in $(seq 1 $timeout) do # Read the log until the sentence is found, that means the app finished to start. Or run until the timeout if grep --quiet "$line_match" "$templog" then echo "The service $service_name has correctly started." >&2 break fi echo -n "." >&2 sleep 1 done if [ $i -eq $timeout ] then echo "The service $service_name didn't fully started before the timeout." >&2 echo "Please find here an extract of the end of the log of the service $service_name:" journalctl --lines=$length -u $service_name >&2 test -e "$log_path" && echo "--" && tail --lines=$length "$log_path" >&2 fi echo "" ynh_clean_check_starting fi } # Execute a command as another user # usage: exec_as USER COMMAND [ARG ...] exec_as() { local USER=$1 shift 1 if [[ $USER = $(whoami) ]]; then eval "$@" else sudo -u "$USER" "$@" fi } # Need also the helper https://github.com/YunoHost-Apps/Experimental_helpers/blob/master/ynh_handle_getopts_args/ynh_handle_getopts_args # Make the main steps to migrate an app to its fork. # # This helper has to be used for an app which needs to migrate to a new name or a new fork # (like owncloud to nextcloud or zerobin to privatebin). # # This helper will move the files of an app to its new name # or recreate the things it can't move. # # To specify which files it has to move, you have to create a "migration file", stored in ../conf # This file is a simple list of each file it has to move, # except that file names must reference the $app variable instead of the real name of the app, # and every instance-specific variables (like $domain). # $app is especially important because it's this variable which will be used to identify the old place and the new one for each file. # # If a database exists for this app, it will be dumped and then imported in a newly created database, with a new name and new user. # Don't forget you have to then apply these changes to application-specific settings (depends on the packaged application) # # Same things for an existing user, a new one will be created. # But the old one can't be removed unless it's not used. See below. # # If you have some dependencies for your app, it's possible to change the fake debian package which manages them. # You have to fill the $pkg_dependencies variable, and then a new fake package will be created and installed, # and the old one will be removed. # If you don't have a $pkg_dependencies variable, the helper can't know what the app dependencies are. # # The app settings.yml will be modified as follows: # - finalpath will be changed according to the new name (but only if the existing $final_path contains the old app name) # - The checksums of php-fpm and nginx config files will be updated too. # - If there is a $db_name value, it will be changed. # - And, of course, the ID will be changed to the new name too. # # Finally, the $app variable will take the value of the new name. # The helper will set the $migration_process variable to 1 if a migration has been successfully handled. # # You have to handle by yourself all the migrations not done by this helper, like configuration or special values in settings.yml # Also, at the end of the upgrade script, you have to add a post_migration script to handle all the things the helper can't do during YunoHost upgrade (mostly for permission reasons), # especially remove the old user, move some hooks and remove the old configuration directory # To launch this script, you have to move it elsewhere and start it after the upgrade script. # `cp ../conf/$script_post_migration /tmp` # `(cd /tmp; echo "/tmp/$script_post_migration" | at now + 2 minutes)` # # usage: ynh_handle_app_migration migration_id migration_list # | arg: -i, --migration_id= - ID from which to migrate # | arg: -l, --migration_list= - File specifying every file to move (one file per line) ynh_handle_app_migration () { # Need for end of install ynh_package_install at #================================================= # LOAD SETTINGS #================================================= old_app=$YNH_APP_INSTANCE_NAME local old_app_id=$YNH_APP_ID local old_app_number=$YNH_APP_INSTANCE_NUMBER # Declare an array to define the options of this helper. declare -Ar args_array=( [i]=migration_id= [l]=migration_list= ) # Get the id from which to migrate local migration_id # And the file with the paths to move local migration_list # Manage arguments with getopts ynh_handle_getopts_args "$@" # Get the new app id in the manifest local new_app_id=$(grep \"id\": ../manifest.json | cut -d\" -f4) if [ $old_app_number -eq 1 ]; then local new_app=$new_app_id else local new_app=${new_app_id}__${old_app_number} fi #================================================= # CHECK IF IT HAS TO MIGRATE #================================================= migration_process=0 if [ "$old_app_id" == "$new_app_id" ] then # If the 2 id are the same # No migration to do. echo 0 return 0 else if [ "$old_app_id" != "$migration_id" ] then # If the new app is not the authorized id, fail. ynh_die --message "Incompatible application for migration from $old_app_id to $new_app_id" fi echo "Migrate from $old_app_id to $new_app_id" >&2 #================================================= # CHECK IF THE MIGRATION CAN BE DONE #================================================= # TODO Handle multi instance apps... # Check that there is not already an app installed for this id. (yunohost app list --installed -f "$new_app" | grep -q id) \ && ynh_die "$new_app is already installed" #================================================= # CHECK THE LIST OF FILES TO MOVE #================================================= local temp_migration_list="$(tempfile)" # Build the list by removing blank lines and comment lines sed '/^#.*\|^$/d' "../conf/$migration_list" > "$temp_migration_list" # Check if there is no file in the destination local file_to_move="" while read file_to_move do # Replace all occurences of $app by $new_app in each file to move. local move_to_destination="${file_to_move//\$app/$new_app}" test -e "$move_to_destination" && ynh_die "A file named $move_to_destination already exists." done < "$temp_migration_list" #================================================= # COPY YUNOHOST SETTINGS FOR THIS APP #================================================= local settings_dir="/etc/yunohost/apps" cp -a "$settings_dir/$old_app" "$settings_dir/$new_app" cp -a ../{scripts,conf} "$settings_dir/$new_app" # Replace the old id by the new one ynh_replace_string "\(^id: .*\)$old_app" "\1$new_app" "$settings_dir/$new_app/settings.yml" # INFO: There a special behavior with yunohost app setting: # if the id given in argument does not match with the id # stored in the config file, the config file will be purged. # That's why we use sed instead of app setting here. # https://github.com/YunoHost/yunohost/blob/c6b5284be8da39cf2da4e1036a730eb5e0515096/src/yunohost/app.py#L1316-L1321 # Change the label if it's simply the name of the app old_label=$(ynh_app_setting_get $new_app label) if [ "${old_label,,}" == "$old_app_id" ] then # Build the new label from the id of the app. With the first character as upper case new_label=$(echo $new_app_id | cut -c1 | tr [:lower:] [:upper:])$(echo $new_app_id | cut -c2-) ynh_app_setting_set $new_app label $new_label fi #================================================= # MOVE FILES TO THE NEW DESTINATION #================================================= while read file_to_move do # Replace all occurence of $app by $new_app in each file to move. move_to_destination="$(eval echo "${file_to_move//\$app/$new_app}")" local real_file_to_move="$(eval echo "${file_to_move//\$app/$old_app}")" echo "Move file $real_file_to_move to $move_to_destination" >&2 mv "$real_file_to_move" "$move_to_destination" done < "$temp_migration_list" #================================================= # UPDATE SETTINGS KNOWN ENTRIES #================================================= # Replace nginx checksum ynh_replace_string "\(^checksum__etc_nginx.*\)_$old_app" "\1_$new_app/" "$settings_dir/$new_app/settings.yml" # Replace php5-fpm checksums ynh_replace_string "\(^checksum__etc_php5.*[-_]\)$old_app" "\1$new_app/" "$settings_dir/$new_app/settings.yml" # Replace final_path ynh_replace_string "\(^final_path: .*\)$old_app" "\1$new_app" "$settings_dir/$new_app/settings.yml" #================================================= # MOVE THE DATABASE #================================================= db_pwd=$(ynh_app_setting_get $old_app mysqlpwd) db_name=$dbname # Check if a database exists before trying to move it local mysql_root_password=$(cat $MYSQL_ROOT_PWD_FILE) if [ -n "$db_name" ] && mysqlshow -u root -p$mysql_root_password | grep -q "^| $db_name" then new_db_name=$(ynh_sanitize_dbid $new_app) echo "Rename the database $db_name to $new_db_name" >&2 local sql_dump="/tmp/${db_name}-$(date '+%s').sql" # Dump the old database ynh_mysql_dump_db "$db_name" > "$sql_dump" # Create a new database ynh_mysql_setup_db $new_db_name $new_db_name $db_pwd # Then restore the old one into the new one ynh_mysql_connect_as $new_db_name $db_pwd $new_db_name < "$sql_dump" # Remove the old database ynh_mysql_remove_db $db_name $db_name # And the dump ynh_secure_remove --file="$sql_dump" # Update the value of $db_name db_name=$new_db_name ynh_app_setting_set $new_app db_name $db_name fi #================================================= # CHANGE THE FAKE DEPENDENCIES PACKAGE #================================================= # Check if a variable $pkg_dependencies exists # If this variable doesn't exist, this part shall be managed in the upgrade script. if [ -n "${pkg_dependencies:-}" ] then # Define the name of the package local old_package_name="${old_app//_/-}-ynh-deps" local new_package_name="${new_app//_/-}-ynh-deps" if ynh_package_is_installed "$old_package_name" then # Install a new fake package app=$new_app ynh_install_app_dependencies $pkg_dependencies # Then remove the old one app=$old_app ynh_remove_app_dependencies fi fi #================================================= # UPDATE THE ID OF THE APP #================================================= app=$new_app # Set migration_process to 1 to inform that an upgrade has been made migration_process=1 fi }