Handle migration from bitwarden

README.md

@@ -52,6 +52,19 @@ How to configure this app: by an admin panel at https://vaultwarden.domain.tld/a
  * Upstream app repository: https://github.com/dani-garcia/vaultwarden
  * YunoHost website: https://yunohost.org/
 
+## Migrate from Bitwarden
+
+This package handle the migration from Bitwarden to Vaultwarden.
+For that, you will have to upgrade your Bitwarden application with this repository.
+This can only be done from the command-line interface - e.g. through SSH.
+Once you're connected, you simply have to execute the following:
+
+```bash
+sudo yunohost app upgrade bitwarden -u https://github.com/YunoHost-Apps/vaultwarden_ynh --debug
+```
+
+The `--debug` option will let you see the full output. If you encounter any issue, please paste it.
+
 ---
 
 ## Developer info

check_process

@@ -18,7 +18,7 @@
 		setup_public=1
 		upgrade=1
 		# Bitwarden 1.20.0~ynh4
-		#upgrade=1	from_commit=d5e1fa7d327c55d8e5ae4c24e7c6aaac006256db
+		upgrade=1	from_commit=d5e1fa7d327c55d8e5ae4c24e7c6aaac006256db
 		backup_restore=1
 		multi_instance=1
 		port_already_use=0

conf/bitwarden_migration

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# App main directory
+/var/www/$app
+
+# NGINX web server configuration
+/etc/nginx/conf.d/$domain.d/$app.conf
+
+# App logs
+/var/log/$app/
+
+# Service configuration
+/etc/systemd/system/$app.service
+
+# Fail2Ban configuration
+/etc/fail2ban/jail.d/$app.conf
+/etc/fail2ban/filter.d/$app.conf

conf/bitwarden_post_migration.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Ending the migration process from Bitwarden to Vaultwarden
+
+set -u
+
+#=================================================
+# IMPORT GENERIC HELPERS
+#=================================================
+
+source /usr/share/yunohost/helpers
+
+#=================================================
+# SET VARIABLES
+#=================================================
+
+old_app="__OLD_APP__"
+new_app="__NEW_APP__"
+script_name="$0"
+
+#=================================================
+# DELETE OLD APP'S SETTINGS
+#=================================================
+
+#ynh_secure_remove --file="/etc/yunohost/apps/$old_app"
+yunohost app ssowatconf
+
+#=================================================
+# REMOVE THE OLD USER
+#=================================================
+
+ynh_system_user_delete --username="$old_app"
+
+#=================================================
+# DELETE THIS SCRIPT
+#=================================================
+
+echo "rm $script_name" | at now + 1 minutes

scripts/_common.sh

@@ -5,7 +5,7 @@
 #=================================================
 
 # dependencies used by the app
-pkg_dependencies="curl tar pkg-config libssl-dev libc6-dev"
+pkg_dependencies="curl tar pkg-config libssl-dev libc6-dev at"
 
 #=================================================
 # PERSONAL HELPERS

scripts/upgrade

@@ -7,6 +7,7 @@
 #=================================================
 
 source _common.sh
+source ynh_handle_app_migration
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -78,7 +79,26 @@ ynh_remove_logrotate
 #=================================================
 ynh_script_progression --message="Stopping a systemd service..."
 
-ynh_systemd_action --service_name=$app --action="stop" --log_path="systemd" --line_match="Stopped vaultwarden Server"
+ynh_systemd_action --service_name=$app --action="stop" --log_path="systemd" --line_match="Stopped"
+
+#=================================================
+# HANDLE MIGRATION FROM BITWARDEN
+#=================================================
+
+ynh_handle_app_migration --migration_id="bitwarden" --migration_list="bitwarden_migration"
+if [ $migration_process -eq 1 ]
+then
+	# If a migration has been perform
+	# Reload some values changed by the migration process
+	final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+	db_name=$(ynh_app_setting_get --app=$app --key=db_name)
+
+	mv $final_path/live/bitwarden_rs.env $final_path/live/vaultwarden.env
+	ynh_delete_file_checksum --file="$final_path/live/bitwarden_rs.env"
+	ynh_store_file_checksum --file="$final_path/live/vaultwarden.env" 
+	ynh_secure_remove --file="$final_path/live/bitwarden_rs"
+	mkdir -p "/etc/yunohost/apps/bitwarden"
+fi
 
 #=================================================
 # CREATE DEDICATED USER
@@ -169,13 +189,6 @@ fi
 #=================================================
 ynh_script_progression --message="Updating a config file..."
 
-# Manage app name change
-if test -f "$final_path/live/bitwarden_rs.env"; then
-    mv -a "$final_path/live/bitwarden_rs.env" "$final_path/live/vaultwarden.env"
-    ynh_delete_file_checksum --file="$final_path/live/bitwarden_rs.env"
-    ynh_store_file_checksum --file="$final_path/live/vaultwarden.env"
-fi
-
 ynh_add_config --template="../conf/vaultwarden.env" --destination="$final_path/live/vaultwarden.env"
 
 chmod 400 "$final_path/live/vaultwarden.env"
@@ -210,6 +223,8 @@ ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --l
 #=================================================
 ynh_script_progression --message="Reconfiguring Fail2Ban..."
 
+mkdir -p "/var/log/$app"
+touch /var/log/"$app"/"$app".log
 # Create a dedicated Fail2Ban config
 ynh_add_fail2ban_config --logpath="/var/log/$app/$app.log" --failregex="^.*Username or password is incorrect\. Try again\. IP: <HOST>\. Username:.*$"
 
@@ -220,6 +235,24 @@ ynh_script_progression --message="Reloading NGINX web server..."
 
 ynh_systemd_action --service_name=nginx --action=reload
 
+#=================================================
+# FINISH MIGRATION PROCESS
+#=================================================
+
+if [ $migration_process -eq 1 ]
+then
+	ynh_script_progression --message="Bitwarden has been successfully migrated to Vaultwarden! \
+A last scheduled operation will run in a couple of minutes to finish the \
+migration in YunoHost side. Do not proceed any application operation while \
+you don't see Vaultwarden as installed."
+	script_post_migration=bitwarden_post_migration.sh
+	cp ../conf/$script_post_migration /tmp
+	ynh_replace_string --match_string="__OLD_APP__" --replace_string="$old_app" --target_file=/tmp/$script_post_migration
+	ynh_replace_string --match_string="__NEW_APP__" --replace_string="$app" --target_file=/tmp/$script_post_migration
+	chmod +x /tmp/$script_post_migration
+	(cd /tmp; echo "/tmp/$script_post_migration > /tmp/$script_post_migration.log 2>&1" | at now + 2 minutes)
+fi
+
 #=================================================
 # END OF SCRIPT
 #=================================================

scripts/ynh_handle_app_migration

@@ -0,0 +1,259 @@
+#!/bin/bash
+
+# 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/$script_post_migration" | at now + 2 minutes)`
+#
+# usage: ynh_handle_app_migration migration_id migration_list
+# | arg: -i, --migration_id= - ID from which to migrate
+# | arg: -l, --migration_list= - File specifying every file to move (one file per line)
+ynh_handle_app_migration ()  {
+  #=================================================
+  # LOAD SETTINGS
+  #=================================================
+
+  old_app=$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
+
+    ynh_print_info --message="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 | grep -q "id: $new_app") \
+    && ynh_die --message="$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 --message="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"
+
+    # Replace the old id by the new one
+    ynh_replace_string --match_string="\(^id: .*\)$old_app" --replace_string="\1$new_app" --target_file="$settings_dir/$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=$(ynh_app_setting_get --app=$new_app --key=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 $new_app_id | cut -c2-)
+        ynh_app_setting_set --app=$new_app --key=label --value=$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}")"
+        ynh_print_info --message="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 --match_string="\(^checksum__etc_nginx.*\)_$old_app" --replace_string="\1_$new_app/" --target_file="$settings_dir/$new_app/settings.yml"
+
+    # Replace php5-fpm checksums
+    ynh_replace_string --match_string="\(^checksum__etc_php5.*[-_]\)$old_app" --replace_string="\1$new_app/" --target_file="$settings_dir/$new_app/settings.yml"
+
+    # Replace final_path
+    ynh_replace_string --match_string="\(^final_path: .*\)$old_app" --replace_string="\1$new_app" --target_file="$settings_dir/$new_app/settings.yml"
+
+    #=================================================
+    # MOVE THE MYSQL DATABASE
+    #=================================================
+
+    old_db_name=$(ynh_app_setting_get --app=$old_app --key=db_name)
+    
+    # Check if a database exists before trying to move it
+    local mysql_root_password=$(cat $MYSQL_ROOT_PWD_FILE)
+    if [ -n "$old_db_name" ] && mysqlshow -u root -p$mysql_root_password | grep -q "^| $old_db_name"
+    then
+        old_db_user=$old_db_name
+        db_pwd=$(ynh_app_setting_get --app=$old_app --key=mysqlpwd)
+
+        new_db_name=$(ynh_sanitize_dbid --db_name=$new_app)
+        new_db_user=$new_db_name
+        ynh_print_info --message="Rename the database $db_name to $new_db_name" >&2
+
+        local sql_dump="/tmp/${db_name}-$(date '+%s').sql"
+
+        # Dump the old database
+        ynh_mysql_dump_db --database="$old_db_name" > "$sql_dump"
+
+        # Create a new database
+        ynh_mysql_setup_db --db_user=$new_db_user --db_name=$new_db_name --db_pwd=$db_pwd
+        
+        # Then restore the old one into the new one
+        ynh_mysql_connect_as --user=$new_db_user --password=$db_pwd --database=$new_db_name < "$sql_dump"
+
+        # Remove the old database
+        ynh_mysql_remove_db --db_user=$old_db_user --db_name=$old_db_name
+
+        # And the dump
+        ynh_secure_remove --file="$sql_dump"
+
+        # Update the value of $db_name
+        db_name=$new_db_name
+        db_user=$new_db_user
+        ynh_app_setting_set --app=$new_app --key=db_name --value=$db_name
+    fi
+
+    #=================================================
+    # CREATE A NEW USER
+    #=================================================
+
+    new_final_path=$(ynh_app_setting_get --app=$new_app --key=final_path)
+
+    # Check if the user exists on the system
+    if ynh_system_user_exists --username="$old_app"
+    then
+      ynh_print_info --message="Create a new user $new_app to replace $old_app" >&2
+      ynh_system_user_create --username=$app --home_dir="$new_final_path"
+    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 --package="$old_package_name"
+      then
+        # Install a new fake package
+        app=$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
+}