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turtl_ynh/scripts/_common.sh
2017-08-11 14:34:22 +02:00

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#!/bin/bash
#=================================================
#=================================================
# TESTING
#=================================================
#=================================================
# Remove a file or a directory securely
#
# usage: ynh_secure_remove path_to_remove
# | arg: path_to_remove - File or directory to remove
ynh_secure_remove () {
path_to_remove=$1
forbidden_path=" \
/var/www \
/home/yunohost.app"
if [[ "$forbidden_path" =~ "$path_to_remove" \
# Match all path or subpath in $forbidden_path
|| "$path_to_remove" =~ ^/[[:alnum:]]+$ \
# Match all first level path from / (Like /var, /root, etc...)
|| "${path_to_remove:${#path_to_remove}-1}" = "/" ]]
# Match if the path finish by /. Because it's seems there is an empty variable
then
echo "Avoid deleting of $path_to_remove." >&2
else
if [ -e "$path_to_remove" ]
then
sudo rm -R "$path_to_remove"
else
echo "$path_to_remove doesn't deleted because it's not exist." >&2
fi
fi
}
ynh_setup_source () {
src_url=$(cat ../conf/app.src | grep SOURCE_URL | cut -d= -f2-)
src_checksum=$(cat ../conf/app.src | grep SOURCE_SUM | cut -d= -f2-)
arch_format=$(cat ../conf/app.src | grep ARCH_FORMAT | cut -d= -f2-)
local_source="/opt/yunohost-apps-src/$YNH_APP_ID/source.$arch_format"
if test -e "$local_source"
then # Use the local source file if it is present
cp $local_source source.$arch_format
else # If not, download the source
wget -nv -O source.$arch_format $src_url
fi
# Check the control sum
echo "$src_checksum source.$arch_format" \
| md5sum -c --status || ynh_die "Corrupt source"
# Extract source into the app dir
sudo mkdir -p "$final_path"
if [ $(echo "$arch_format" | tr '[:upper:]' '[:lower:]') = "zip" ]
then # Zip format
# Using of a temp directory, because unzip doesn't manage --strip-components
temp_dir=$(mktemp -d)
unzip -quo source.zip -d "$temp_dir"
sudo cp -a $temp_dir/*/. "$final_path"
ynh_secure_remove "$temp_dir"
elif [ $(echo "$arch_format" | tr '[:upper:]' '[:lower:]') = "tar.gz" ]; then
sudo tar -x -f source.tar.gz -C "$final_path" --strip-components 1
else
ynh_die "Format d'archive non reconnu."
fi
# Apply patches
if test -f ../sources/patches/*.patch; then
(cd "$DEST" \
&& for p in ${PKG_DIR}/patches/*.patch; do \
sudo patch -p1 < $p; done) \
|| ynh_die "Unable to apply patches"
fi
# Add supplementary files
if test -e "../sources/extra_files"; then
sudo cp -a ../sources/extra_files/. "$final_path"
fi
}
ynh_backup_abstract () {
# A intégrer à ynh_backup directement.
ynh_backup "$@"
echo "$2" "$1" >> backup_list
}
ynh_restore_file () {
file_and_dest=$(grep "^$1" backup_list)
backup_file=${file_and_dest%% *}
backup_dest=${file_and_dest#* }
if [ -f "$backup_dest" ]; then
ynh_die "There is already a file at this path: $backup_dest"
fi
if test -d "$backup_file"; then
sudo cp -a "$backup_file/." "$backup_dest"
else
sudo cp -a "$backup_file" "$backup_dest"
fi
}
ynh_fpm_config () {
finalphpconf="/etc/php5/fpm/pool.d/$app.conf"
ynh_compare_checksum_config "$finalphpconf" 1
sudo cp ../conf/php-fpm.conf "$finalphpconf"
ynh_replace_string "__NAMETOCHANGE__" "$app" "$finalphpconf"
ynh_replace_string "__FINALPATH__" "$final_path" "$finalphpconf"
ynh_replace_string "__USER__" "$app" "$finalphpconf"
sudo chown root: "$finalphpconf"
ynh_store_checksum_config "$finalphpconf"
if [ -e "../conf/php-fpm.ini" ]
then
finalphpini="/etc/php5/fpm/conf.d/20-$app.ini"
ynh_compare_checksum_config "$finalphpini" 1
sudo cp ../conf/php-fpm.ini "$finalphpini"
sudo chown root: "$finalphpini"
ynh_store_checksum_config "$finalphpini"
fi
sudo systemctl reload php5-fpm
}
ynh_remove_fpm_config () {
ynh_secure_remove "/etc/php5/fpm/pool.d/$app.conf"
ynh_secure_remove "/etc/php5/fpm/conf.d/20-$app.ini"
sudo systemctl reload php5-fpm
}
ynh_nginx_config () {
finalnginxconf="/etc/nginx/conf.d/$domain.d/$app.conf"
ynh_compare_checksum_config "$finalnginxconf" 1
sudo cp ../conf/nginx.conf "$finalnginxconf"
# To avoid a break by set -u, use a void substitution ${var:-}. If the variable is not set, it's simply set with an empty variable.
# Substitute in a nginx config file only if the variable is not empty
if test -n "${path_url:-}"; then
ynh_replace_string "__PATH__" "$path_url" "$finalnginxconf"
fi
if test -n "${domain:-}"; then
ynh_replace_string "__DOMAIN__" "$domain" "$finalnginxconf"
fi
if test -n "${port:-}"; then
ynh_replace_string "__PORT__" "$port" "$finalnginxconf"
fi
if test -n "${app:-}"; then
ynh_replace_string "__NAME__" "$app" "$finalnginxconf"
fi
if test -n "${final_path:-}"; then
ynh_replace_string "__FINALPATH__" "$final_path" "$finalnginxconf"
fi
ynh_store_checksum_config "$finalnginxconf"
sudo systemctl reload nginx
}
ynh_remove_nginx_config () {
ynh_secure_remove "/etc/nginx/conf.d/$domain.d/$app.conf"
sudo systemctl reload nginx
}
ynh_store_checksum_config () {
config_file_checksum=checksum_${1//[\/ ]/_} # Replace all '/' and ' ' by '_'
ynh_app_setting_set $app $config_file_checksum $(sudo md5sum "$1" | cut -d' ' -f1)
}
ynh_compare_checksum_config () {
current_config_file=$1
compress_backup=${2:-0} # If $2 is empty, compress_backup will set at 0
config_file_checksum=checksum_${current_config_file//[\/ ]/_} # Replace all '/' and ' ' by '_'
checksum_value=$(ynh_app_setting_get $app $config_file_checksum)
if [ -n "$checksum_value" ]
then # Proceed only if a value was stocked into the app config
if ! echo "$checksum_value $current_config_file" | sudo md5sum -c --status
then # If the checksum is now different
backup_config_file="$current_config_file.backup.$(date '+%d.%m.%y_%Hh%M,%Ss')"
if [ $compress_backup -eq 1 ]
then
sudo tar --create --gzip --file "$backup_config_file.tar.gz" "$current_config_file" # Backup the current config file and compress
backup_config_file="$backup_config_file.tar.gz"
else
sudo cp -a "$current_config_file" "$backup_config_file" # Backup the current config file
fi
echo "Config file $current_config_file has been manually modified since the installation or last upgrade. So it has been duplicated in $backup_config_file" >&2
echo "$backup_config_file" # Return the name of the backup file
fi
fi
}
ynh_systemd_config () {
finalsystemdconf="/etc/systemd/system/$app.service"
ynh_compare_checksum_config "$finalsystemdconf" 1
sudo cp ../conf/systemd.service "$finalsystemdconf"
# To avoid a break by set -u, use a void substitution ${var:-}. If the variable is not set, it's simply set with an empty variable.
# Substitute in a nginx config file only if the variable is not empty
if test -n "${final_path:-}"; then
ynh_replace_string "__FINALPATH__" "$final_path" "$finalsystemdconf"
fi
if test -n "${app:-}"; then
ynh_replace_string "__APP__" "$app" "$finalsystemdconf"
fi
ynh_store_checksum_config "$finalsystemdconf"
sudo chown root: "$finalsystemdconf"
sudo systemctl enable $app
sudo systemctl daemon-reload
}
ynh_remove_systemd_config () {
finalsystemdconf="/etc/systemd/system/$app.service"
if [ -e "$finalsystemdconf" ]; then
sudo systemctl stop $app
sudo systemctl disable $app
ynh_secure_remove "$finalsystemdconf"
fi
}
#=================================================
#=================================================
#=================================================
# CHECKING
#=================================================
CHECK_DOMAINPATH () { # Vérifie la disponibilité du path et du domaine.
sudo yunohost app checkurl $domain$path_url -a $app
}
CHECK_FINALPATH () { # Vérifie que le dossier de destination n'est pas déjà utilisé.
final_path=/var/www/$app
test ! -e "$final_path" || ynh_die "This path already contains a folder"
}
#=================================================
# DISPLAYING
#=================================================
NO_PRINT () { # Supprime l'affichage dans stdout pour la commande en argument.
set +x
$@
set -x
}
WARNING () { # Écrit sur le canal d'erreur pour passer en warning.
$@ >&2
}
SUPPRESS_WARNING () { # Force l'écriture sur la sortie standard
$@ 2>&1
}
QUIET () { # Redirige la sortie standard dans /dev/null
$@ > /dev/null
}
ALL_QUIET () { # Redirige la sortie standard et d'erreur dans /dev/null
$@ > /dev/null 2>&1
}
#=================================================
# BACKUP
#=================================================
BACKUP_FAIL_UPGRADE () {
WARNING echo "Upgrade failed."
app_bck=${app//_/-} # Replace all '_' by '-'
if sudo yunohost backup list | grep -q $app_bck-pre-upgrade$backup_number; then # Vérifie l'existence de l'archive avant de supprimer l'application et de restaurer
sudo yunohost app remove $app # Supprime l'application avant de la restaurer.
sudo yunohost backup restore --ignore-hooks $app_bck-pre-upgrade$backup_number --apps $app --force # Restore the backup if upgrade failed
ynh_die "The app was restored to the way it was before the failed upgrade."
fi
}
BACKUP_BEFORE_UPGRADE () { # Backup the current version of the app, restore it if the upgrade fails
backup_number=1
old_backup_number=2
app_bck=${app//_/-} # Replace all '_' by '-'
if sudo yunohost backup list | grep -q $app_bck-pre-upgrade1; then # Vérifie l'existence d'une archive déjà numéroté à 1.
backup_number=2 # Et passe le numéro de l'archive à 2
old_backup_number=1
fi
sudo yunohost backup create --ignore-hooks --apps $app --name $app_bck-pre-upgrade$backup_number # Créer un backup différent de celui existant.
if [ "$?" -eq 0 ]; then # Si le backup est un succès, supprime l'archive précédente.
if sudo yunohost backup list | grep -q $app_bck-pre-upgrade$old_backup_number; then # Vérifie l'existence de l'ancienne archive avant de la supprimer, pour éviter une erreur.
QUIET sudo yunohost backup delete $app_bck-pre-upgrade$old_backup_number
fi
else # Si le backup a échoué
ynh_die "Backup failed, the upgrade process was aborted."
fi
}
HUMAN_SIZE () { # Transforme une taille en Ko en une taille lisible pour un humain
human=$(numfmt --to=iec --from-unit=1K $1)
echo $human
}
CHECK_SIZE () { # Vérifie avant chaque backup que l'espace est suffisant
file_to_analyse=$1
backup_size=$(sudo du --summarize "$file_to_analyse" | cut -f1)
free_space=$(sudo df --output=avail "/home/yunohost.backup" | sed 1d)
if [ $free_space -le $backup_size ]
then
WARNING echo "Espace insuffisant pour sauvegarder $file_to_analyse."
WARNING echo "Espace disponible: $(HUMAN_SIZE $free_space)"
ynh_die "Espace nécessaire: $(HUMAN_SIZE $backup_size)"
fi
}
#=================================================
# PACKAGE CHECK BYPASSING...
#=================================================
IS_PACKAGE_CHECK () { # Détermine une exécution en conteneur (Non testé)
return $(uname -n | grep -c 'pchecker_lxc')
}
#=================================================
#=================================================
# FUTUR YNH HELPERS
#=================================================
# Importer ce fichier de fonction avant celui des helpers officiel
# Ainsi, les officiels prendront le pas sur ceux-ci le cas échéant
#=================================================
# Normalize the url path syntax
# Handle the slash at the beginning of path and its absence at ending
# Return a normalized url path
#
# example: url_path=$(ynh_normalize_url_path $url_path)
# ynh_normalize_url_path example -> /example
# ynh_normalize_url_path /example -> /example
# ynh_normalize_url_path /example/ -> /example
# ynh_normalize_url_path / -> /
#
# usage: ynh_normalize_url_path path_to_normalize
# | arg: url_path_to_normalize - URL path to normalize before using it
ynh_normalize_url_path () {
path_url=$1
test -n "$path_url" || ynh_die "ynh_normalize_url_path expect a URL path as first argument and received nothing."
if [ "${path_url:0:1}" != "/" ]; then # If the first character is not a /
path_url="/$path_url" # Add / at begin of path variable
fi
if [ "${path_url:${#path_url}-1}" == "/" ] && [ ${#path_url} -gt 1 ]; then # If the last character is a / and that not the only character.
path_url="${path_url:0:${#path_url}-1}" # Delete the last character
fi
echo $path_url
}
# Create a database, an user and its password. Then store the password in the app's config
#
# User of database will be store in db_user's variable.
# Name of database will be store in db_name's variable.
# And password in db_pwd's variable.
#
# usage: ynh_mysql_generate_db user name
# | arg: user - Owner of the database
# | arg: name - Name of the database
ynh_mysql_generate_db () {
db_pwd=$(ynh_string_random) # Generate a random password
ynh_mysql_create_db "$2" "$1" "$db_pwd" # Create the database
ynh_app_setting_set $app mysqlpwd $db_pwd # Store the password in the app's config
}
# Remove a database if it exist and the associated user
#
# usage: ynh_mysql_remove_db user name
# | arg: user - Proprietary of the database
# | arg: name - Name of the database
ynh_mysql_remove_db () {
if mysqlshow -u root -p$(sudo cat $MYSQL_ROOT_PWD_FILE) | grep -q "^| $2"; then # Check if the database exist
echo "Remove database $2" >&2
ynh_mysql_drop_db $2 # Remove the database
ynh_mysql_drop_user $1 # Remove the associated user to database
else
echo "Database $2 not found" >&2
fi
}
# Correct the name given in argument for mariadb
#
# Avoid invalid name for your database
#
# Exemple: dbname=$(ynh_make_valid_dbid $app)
#
# usage: ynh_make_valid_dbid name
# | arg: name - name to correct
# | ret: the corrected name
ynh_make_valid_dbid () {
dbid=${1//[-.]/_} # Mariadb doesn't support - and . in the name of databases. It will be replace by _
echo $dbid
}
# Manage a fail of the script
#
# Print a warning to inform that the script was failed
# Execute the ynh_clean_setup function if used in the app script
#
# usage of ynh_clean_setup function
# This function provide a way to clean some residual of installation that not managed by remove script.
# To use it, simply add in your script:
# ynh_clean_setup () {
# instructions...
# }
# This function is optionnal.
#
# Usage: ynh_exit_properly is used only by the helper ynh_abort_if_errors.
# You must not use it directly.
ynh_exit_properly () {
exit_code=$?
if [ "$exit_code" -eq 0 ]; then
ynh_die "" 0 # Exit without error if the script ended correctly
fi
trap '' EXIT # Ignore new exit signals
set +eu # Do not exit anymore if a command fail or if a variable is empty
echo -e "!!\n $app's script has encountered an error. Its execution was cancelled.\n!!" >&2
if type -t ynh_clean_setup > /dev/null; then # Check if the function exist in the app script.
ynh_clean_setup # Call the function to do specific cleaning for the app.
fi
ynh_die # Exit with error status
}
# Exit if an error occurs during the execution of the script.
#
# Stop immediatly the execution if an error occured or if a empty variable is used.
# The execution of the script is derivate to ynh_exit_properly function before exit.
#
# Usage: ynh_abort_if_errors
ynh_abort_if_errors () {
set -eu # Exit if a command fail, and if a variable is used unset.
trap ynh_exit_properly EXIT # Capturing exit signals on shell script
}
# Define and install dependencies with a equivs control file
# This helper can/should only be called once per app
#
# usage: ynh_install_app_dependencies dep [dep [...]]
# | arg: dep - the package name to install in dependence
ynh_install_app_dependencies () {
dependencies=$@
manifest_path="../manifest.json"
if [ ! -e "$manifest_path" ]; then
manifest_path="../settings/manifest.json" # Into the restore script, the manifest is not at the same place
fi
version=$(sudo python3 -c "import sys, json;print(json.load(open(\"$manifest_path\"))['version'])") # Retrieve the version number in the manifest file.
dep_app=${app//_/-} # Replace all '_' by '-'
if ynh_package_is_installed "${dep_app}-ynh-deps"; then
echo "A package named ${dep_app}-ynh-deps is already installed" >&2
else
cat > ./${dep_app}-ynh-deps.control << EOF # Make a control file for equivs-build
Section: misc
Priority: optional
Package: ${dep_app}-ynh-deps
Version: ${version}
Depends: ${dependencies// /, }
Architecture: all
Description: Fake package for ${app} (YunoHost app) dependencies
This meta-package is only responsible of installing its dependencies.
EOF
ynh_package_install_from_equivs ./${dep_app}-ynh-deps.control \
|| ynh_die "Unable to install dependencies" # Install the fake package and its dependencies
ynh_app_setting_set $app apt_dependencies $dependencies
fi
}
# Remove fake package and its dependencies
#
# Dependencies will removed only if no other package need them.
#
# usage: ynh_remove_app_dependencies
ynh_remove_app_dependencies () {
dep_app=${app//_/-} # Replace all '_' by '-'
ynh_package_autoremove ${dep_app}-ynh-deps # Remove the fake package and its dependencies if they not still used.
}
# Use logrotate to manage the logfile
#
# usage: ynh_use_logrotate [logfile]
# | arg: logfile - absolute path of logfile
#
# If no argument provided, a standard directory will be use. /var/log/${app}
# You can provide a path with the directory only or with the logfile.
# /parentdir/logdir/
# /parentdir/logdir/logfile.log
#
# It's possible to use this helper several times, each config will added to same logrotate config file.
ynh_use_logrotate () {
if [ "$#" -gt 0 ]; then
if [ "$(echo ${1##*.})" == "log" ]; then # Keep only the extension to check if it's a logfile
logfile=$1 # In this case, focus logrotate on the logfile
else
logfile=$1/.log # Else, uses the directory and all logfile into it.
fi
else
logfile="/var/log/${app}/.log" # Without argument, use a defaut directory in /var/log
fi
cat > ./${app}-logrotate << EOF # Build a config file for logrotate
$logfile {
# Rotate if the logfile exceeds 100Mo
size 100M
# Keep 12 old log maximum
rotate 12
# Compress the logs with gzip
compress
# Compress the log at the next cycle. So keep always 2 non compressed logs
delaycompress
# Copy and truncate the log to allow to continue write on it. Instead of move the log.
copytruncate
# Do not do an error if the log is missing
missingok
# Not rotate if the log is empty
notifempty
# Keep old logs in the same dir
noolddir
}
EOF
sudo mkdir -p $(dirname "$logfile") # Create the log directory, if not exist
cat ${app}-logrotate | sudo tee -a /etc/logrotate.d/$app > /dev/null # Append this config to the others for this app. If a config file already exist
}
# Remove the app's logrotate config.
#
# usage: ynh_remove_logrotate
ynh_remove_logrotate () {
if [ -e "/etc/logrotate.d/$app" ]; then
sudo rm "/etc/logrotate.d/$app"
fi
}
# Find a free port and return it
#
# example: port=$(ynh_find_port 8080)
#
# usage: ynh_find_port begin_port
# | arg: begin_port - port to start to search
ynh_find_port () {
port=$1
test -n "$port" || ynh_die "The argument of ynh_find_port must be a valid port."
while netcat -z 127.0.0.1 $port # Check if the port is free
do
port=$((port+1)) # Else, pass to next port
done
echo $port
}
# Create a system user
#
# usage: ynh_system_user_create user_name [home_dir]
# | arg: user_name - Name of the system user that will be create
# | arg: home_dir - Path of the home dir for the user. Usually the final path of the app. If this argument is omitted, the user will be created without home
ynh_system_user_create () {
if ! ynh_system_user_exists "$1" # Check if the user exists on the system
then # If the user doesn't exist
if [ $# -ge 2 ]; then # If a home dir is mentioned
user_home_dir="-d $2"
else
user_home_dir="--no-create-home"
fi
sudo useradd $user_home_dir --system --user-group $1 --shell /usr/sbin/nologin || ynh_die "Unable to create $1 system account"
fi
}
# Delete a system user
#
# usage: ynh_system_user_delete user_name
# | arg: user_name - Name of the system user that will be create
ynh_system_user_delete () {
if ynh_system_user_exists "$1" # Check if the user exists on the system
then
echo "Remove the user $1" >&2
sudo userdel $1
else
echo "The user $1 was not found" >&2
fi
}
# Curl abstraction to help with POST requests to local pages (such as installation forms)
#
# $domain and $path_url should be defined externally (and correspond to the domain.tld and the /path (of the app?))
#
# example: ynh_local_curl "/install.php?installButton" "foo=$var1" "bar=$var2"
#
# usage: ynh_local_curl "page_uri" "key1=value1" "key2=value2" ...
# | arg: page_uri - Path (relative to $path_url) of the page where POST data will be sent
# | arg: key1=value1 - (Optionnal) POST key and corresponding value
# | arg: key2=value2 - (Optionnal) Another POST key and corresponding value
# | arg: ... - (Optionnal) More POST keys and values
ynh_local_curl () {
# Define url of page to curl
full_page_url=https://localhost$path_url$1
# Concatenate all other arguments with '&' to prepare POST data
POST_data=""
for arg in "${@:2}"
do
POST_data="${POST_data}${arg}&"
done
# (Remove the last character, which is an unecessary '&')
POST_data=${POST_data::-1}
# Curl the URL
curl -kL -H "Host: $domain" --resolve $domain:443:127.0.0.1 --data "$POST_data" "$full_page_url" 2>&1
}
# Substitute/replace a string by another in a file
#
# usage: ynh_replace_string match_string replace_string target_file
# | arg: match_string - String to be searched and replaced in the file
# | arg: replace_string - String that will replace matches
# | arg: target_file - File in which the string will be replaced.
ynh_replace_string () {
delimit=@
match_string=${1//${delimit}/"\\${delimit}"} # Escape the delimiter if it's in the string.
replace_string=${2//${delimit}/"\\${delimit}"}
workfile=$3
sudo sed --in-place "s${delimit}${match_string}${delimit}${replace_string}${delimit}g" "$workfile"
}