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yunohost/data/helpers.d/utils
Kayou 7a0aa851a6
Keep helpers consistent
2020-11-26 11:00:24 +01:00

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#!/bin/bash
# Handle script crashes / failures
#
# [internal]
#
# usage:
# ynh_exit_properly is used only by the helper ynh_abort_if_errors.
# You should not use it directly.
# Instead, add to your script:
# ynh_clean_setup () {
# instructions...
# }
#
# This function provide a way to clean some residual of installation that not managed by remove script.
#
# It prints a warning to inform that the script was failed, and execute the ynh_clean_setup function if used in the app script
#
# Requires YunoHost version 2.6.4 or higher.
ynh_exit_properly () {
local exit_code=$?
if [ "$exit_code" -eq 0 ]; then
exit 0 # Exit without error if the script ended correctly
fi
trap '' EXIT # Ignore new exit signals
# Do not exit anymore if a command fail or if a variable is empty
set +o errexit # set +e
set +o nounset # set +u
# Small tempo to avoid the next message being mixed up with other DEBUG messages
sleep 0.5
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
# Exit with error status
# We don't call ynh_die basically to avoid unecessary 10-ish
# debug lines about parsing args and stuff just to exit 1..
exit 1
}
# Exits if an error occurs during the execution of the script.
#
# usage: ynh_abort_if_errors
#
# This configure the rest of the script execution such that, if an error occurs
# or if an empty variable is used, the execution of the script stops
# immediately and a call to `ynh_clean_setup` is triggered if it has been
# defined by your script.
#
# Requires YunoHost version 2.6.4 or higher.
ynh_abort_if_errors () {
set -o errexit # set -e; Exit if a command fail
set -o nounset # set -u; And if a variable is used unset
trap ynh_exit_properly EXIT # Capturing exit signals on shell script
}
# Download, check integrity, uncompress and patch the source from app.src
#
# usage: ynh_setup_source --dest_dir=dest_dir [--source_id=source_id]
# | arg: -d, --dest_dir= - Directory where to setup sources
# | arg: -s, --source_id= - Name of the app, if the package contains more than one app
#
# The file conf/app.src need to contains:
#
# SOURCE_URL=Address to download the app archive
# SOURCE_SUM=Control sum
# # (Optional) Program to check the integrity (sha256sum, md5sum...)
# # default: sha256
# SOURCE_SUM_PRG=sha256
# # (Optional) Archive format
# # default: tar.gz
# SOURCE_FORMAT=tar.gz
# # (Optional) Put false if sources are directly in the archive root
# # default: true
# # Instead of true, SOURCE_IN_SUBDIR could be the number of sub directories
# # to remove.
# SOURCE_IN_SUBDIR=false
# # (Optionnal) Name of the local archive (offline setup support)
# # default: ${src_id}.${src_format}
# SOURCE_FILENAME=example.tar.gz
# # (Optional) If it set as false don't extract the source.
# # (Useful to get a debian package or a python wheel.)
# # default: true
# SOURCE_EXTRACT=(true|false)
#
# Details:
# This helper downloads sources from SOURCE_URL if there is no local source
# archive in /opt/yunohost-apps-src/APP_ID/SOURCE_FILENAME
#
# Next, it checks the integrity with "SOURCE_SUM_PRG -c --status" command.
#
# If it's ok, the source archive will be uncompressed in $dest_dir. If the
# SOURCE_IN_SUBDIR is true, the first level directory of the archive will be
# removed.
# If SOURCE_IN_SUBDIR is a numeric value, 2 for example, the 2 first level
# directories will be removed
#
# Finally, patches named sources/patches/${src_id}-*.patch and extra files in
# sources/extra_files/$src_id will be applied to dest_dir
#
# Requires YunoHost version 2.6.4 or higher.
ynh_setup_source () {
# Declare an array to define the options of this helper.
local legacy_args=ds
local -A args_array=( [d]=dest_dir= [s]=source_id= )
local dest_dir
local source_id
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
source_id="${source_id:-app}" # If the argument is not given, source_id equals "app"
local src_file_path="$YNH_CWD/../conf/${source_id}.src"
# In case of restore script the src file is in an other path.
# So try to use the restore path if the general path point to no file.
if [ ! -e "$src_file_path" ]; then
src_file_path="$YNH_CWD/../settings/conf/${source_id}.src"
fi
# Load value from configuration file (see above for a small doc about this file
# format)
local src_url=$(grep 'SOURCE_URL=' "$src_file_path" | cut --delimiter='=' --fields=2-)
local src_sum=$(grep 'SOURCE_SUM=' "$src_file_path" | cut --delimiter='=' --fields=2-)
local src_sumprg=$(grep 'SOURCE_SUM_PRG=' "$src_file_path" | cut --delimiter='=' --fields=2-)
local src_format=$(grep 'SOURCE_FORMAT=' "$src_file_path" | cut --delimiter='=' --fields=2-)
local src_extract=$(grep 'SOURCE_EXTRACT=' "$src_file_path" | cut --delimiter='=' --fields=2-)
local src_in_subdir=$(grep 'SOURCE_IN_SUBDIR=' "$src_file_path" | cut --delimiter='=' --fields=2-)
local src_filename=$(grep 'SOURCE_FILENAME=' "$src_file_path" | cut --delimiter='=' --fields=2-)
# Default value
src_sumprg=${src_sumprg:-sha256sum}
src_in_subdir=${src_in_subdir:-true}
src_format=${src_format:-tar.gz}
src_format=$(echo "$src_format" | tr '[:upper:]' '[:lower:]')
src_extract=${src_extract:-true}
if [ "$src_filename" = "" ]; then
src_filename="${source_id}.${src_format}"
fi
local local_src="/opt/yunohost-apps-src/${YNH_APP_ID}/${src_filename}"
if test -e "$local_src"
then # Use the local source file if it is present
cp $local_src $src_filename
else # If not, download the source
# NB. we have to declare the var as local first,
# otherwise 'local foo=$(false) || echo 'pwet'" does'nt work
# because local always return 0 ...
local out
# Timeout option is here to enforce the timeout on dns query and tcp connect (c.f. man wget)
out=$(wget --tries 3 --no-dns-cache --timeout 900 --no-verbose --output-document=$src_filename $src_url 2>&1) \
|| ynh_die --message="$out"
fi
# Check the control sum
echo "${src_sum} ${src_filename}" | ${src_sumprg} --check --status \
|| ynh_die --message="Corrupt source"
# Extract source into the app dir
mkdir --parents "$dest_dir"
if ! "$src_extract"
then
mv $src_filename $dest_dir
elif [ "$src_format" = "zip" ]
then
# Zip format
# Using of a temp directory, because unzip doesn't manage --strip-components
if $src_in_subdir
then
local tmp_dir=$(mktemp --directory)
unzip -quo $src_filename -d "$tmp_dir"
cp --archive $tmp_dir/*/. "$dest_dir"
ynh_secure_remove --file="$tmp_dir"
else
unzip -quo $src_filename -d "$dest_dir"
fi
else
local strip=""
if [ "$src_in_subdir" != "false" ]
then
if [ "$src_in_subdir" == "true" ]
then
local sub_dirs=1
else
local sub_dirs="$src_in_subdir"
fi
strip="--strip-components $sub_dirs"
fi
if [[ "$src_format" =~ ^tar.gz|tar.bz2|tar.xz$ ]]
then
tar --extract --file=$src_filename --directory="$dest_dir" $strip
else
ynh_die --message="Archive format unrecognized."
fi
fi
# Apply patches
if (( $(find $YNH_CWD/../sources/patches/ -type f -name "${source_id}-*.patch" 2> /dev/null | wc --lines) > "0" ))
then
(cd "$dest_dir"
for p in $YNH_CWD/../sources/patches/${source_id}-*.patch
do
patch --strip=1 < $p
done) || ynh_die --message="Unable to apply patches"
fi
# Add supplementary files
if test -e "$YNH_CWD/../sources/extra_files/${source_id}"; then
cp --archive $YNH_CWD/../sources/extra_files/$source_id/. "$dest_dir"
fi
}
# Curl abstraction to help with POST requests to local pages (such as installation forms)
#
# example: ynh_local_curl "/install.php?installButton" "foo=$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
#
# For multiple calls, cookies are persisted between each call for the same app
#
# $domain and $path_url should be defined externally (and correspond to the domain.tld and the /path (of the app?))
#
# Requires YunoHost version 2.6.4 or higher.
ynh_local_curl () {
# Define url of page to curl
local local_page=$(ynh_normalize_url_path $1)
local full_path=$path_url$local_page
if [ "${path_url}" == "/" ]; then
full_path=$local_page
fi
local full_page_url=https://localhost$full_path
# Concatenate all other arguments with '&' to prepare POST data
local POST_data=""
local arg=""
for arg in "${@:2}"
do
POST_data="${POST_data}${arg}&"
done
if [ -n "$POST_data" ]
then
# Add --data arg and remove the last character, which is an unecessary '&'
POST_data="--data ${POST_data::-1}"
fi
# Wait untils nginx has fully reloaded (avoid curl fail with http2)
sleep 2
local cookiefile=/tmp/ynh-$app-cookie.txt
touch $cookiefile
chown root $cookiefile
chmod 700 $cookiefile
# Curl the URL
curl --silent --show-error --insecure --location --header "Host: $domain" --resolve $domain:443:127.0.0.1 $POST_data "$full_page_url" --cookie-jar $cookiefile --cookie $cookiefile
}
# Create a dedicated config file from a template
#
# examples:
# ynh_add_config --template=".env" --destination="$final_path/.env"
# ynh_add_config --template="../conf/.env" --destination="$final_path/.env"
# ynh_add_config --template="/etc/nginx/sites-available/default" --destination="etc/nginx/sites-available/mydomain.conf"
#
# usage: ynh_add_config --template="template" --destination="destination"
# | arg: -t, --template= - Template config file to use
# | arg: -d, --destination= - Destination of the config file
#
# The template can be by default the name of a file in the conf directory
# of a YunoHost Package, a relative path or an absolute path
# The helper will use the template $template to generate a config file
# $destination by replacing the following keywords with global variables
# that should be defined before calling this helper :
# __PATH__ by $path_url
# __NAME__ by $app
# __NAMETOCHANGE__ by $app
# __USER__ by $app
# __FINALPATH__ by $final_path
# __PHPVERSION__ by $YNH_PHP_VERSION
# __YNH_NODE_LOAD_PATH__ by $ynh_node_load_PATH
#
# And any dynamic variables that should be defined before calling this helper like:
# __DOMAIN__ by $domain
# __APP__ by $app
# __VAR_1__ by $var_1
# __VAR_2__ by $var_2
#
# The helper will verify the checksum and backup the destination file
# if it's different before applying the new template.
# And it will calculate and store the destination file checksum
# into the app settings when configuration is done.
#
# Requires YunoHost version 4.1.0 or higher.
ynh_add_config () {
# Declare an array to define the options of this helper.
local legacy_args=tdv
local -A args_array=( [t]=template= [d]=destination= )
local template
local destination
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
local template_path
if [ -f "../conf/$template" ]; then
template_path="../conf/$template"
elif [ -f "../settings/conf/$template" ]; then
template_path="../settings/conf/$template"
elif [ -f "$template" ]; then
template_path=$template
else
ynh_die --message="The provided template $template doesn't exist"
fi
ynh_backup_if_checksum_is_different --file="$destination"
cp "$template_path" "$destination"
ynh_replace_vars --file="$destination"
ynh_store_file_checksum --file="$destination"
}
# Replace variables in a file
#
# [internal]
#
# usage: ynh_replace_vars --file="file"
# | arg: -f, --file= - File where to replace variables
#
# The helper will replace the following keywords with global variables
# that should be defined before calling this helper :
# __PATH__ by $path_url
# __NAME__ by $app
# __NAMETOCHANGE__ by $app
# __USER__ by $app
# __FINALPATH__ by $final_path
# __PHPVERSION__ by $YNH_PHP_VERSION
# __YNH_NODE_LOAD_PATH__ by $ynh_node_load_PATH
#
# And any dynamic variables that should be defined before calling this helper like:
# __DOMAIN__ by $domain
# __APP__ by $app
# __VAR_1__ by $var_1
# __VAR_2__ by $var_2
#
# Requires YunoHost version 4.1.0 or higher.
ynh_replace_vars () {
# Declare an array to define the options of this helper.
local legacy_args=f
local -A args_array=( [f]=file= )
local file
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
# Replace specific YunoHost variables
if test -n "${path_url:-}"
then
# path_url_slash_less is path_url, or a blank value if path_url is only '/'
local path_url_slash_less=${path_url%/}
ynh_replace_string --match_string="__PATH__/" --replace_string="$path_url_slash_less/" --target_file="$file"
ynh_replace_string --match_string="__PATH__" --replace_string="$path_url" --target_file="$file"
fi
if test -n "${app:-}"; then
ynh_replace_string --match_string="__NAME__" --replace_string="$app" --target_file="$file"
ynh_replace_string --match_string="__NAMETOCHANGE__" --replace_string="$app" --target_file="$file"
ynh_replace_string --match_string="__USER__" --replace_string="$app" --target_file="$file"
fi
if test -n "${final_path:-}"; then
ynh_replace_string --match_string="__FINALPATH__" --replace_string="$final_path" --target_file="$file"
fi
if test -n "${YNH_PHP_VERSION:-}"; then
ynh_replace_string --match_string="__PHPVERSION__" --replace_string="$YNH_PHP_VERSION" --target_file="$file"
fi
if test -n "${ynh_node_load_PATH:-}"; then
ynh_replace_string --match_string="__YNH_NODE_LOAD_PATH__" --replace_string="$ynh_node_load_PATH" --target_file="$file"
fi
# Replace others variables
# List other unique (__ __) variables in $file
local uniques_vars=( $(grep -o '__[A-Z0-9_]*__' $file | sort --unique | sed "s@__\([^.]*\)__@\L\1@g" ))
# Do the replacement
local delimit=@
for one_var in "${uniques_vars[@]}"
do
# Validate that one_var is indeed defined
test -n "${!one_var:-}" || ynh_die --message="\$$one_var wasn't initialized when trying to replace __${one_var^^}__ in $file"
# Escape delimiter in match/replace string
match_string="__${one_var^^}__"
match_string=${match_string//${delimit}/"\\${delimit}"}
replace_string="${!one_var}"
replace_string=${replace_string//${delimit}/"\\${delimit}"}
# Actually replace (sed is used instead of ynh_replace_string to avoid triggering an epic amount of debug logs)
sed --in-place "s${delimit}${match_string}${delimit}${replace_string}${delimit}g" "$file"
done
}
# Render templates with Jinja2
#
# [internal]
#
# Attention : Variables should be exported before calling this helper to be
# accessible inside templates.
#
# usage: ynh_render_template some_template output_path
# | arg: some_template - Template file to be rendered
# | arg: output_path - The path where the output will be redirected to
ynh_render_template() {
local template_path=$1
local output_path=$2
mkdir -p "$(dirname $output_path)"
# Taken from https://stackoverflow.com/a/35009576
python2.7 -c 'import os, sys, jinja2; sys.stdout.write(
jinja2.Template(sys.stdin.read()
).render(os.environ));' < $template_path > $output_path
}
# Fetch the Debian release codename
#
# usage: ynh_get_debian_release
# | ret: The Debian release codename (i.e. jessie, stretch, ...)
#
# Requires YunoHost version 2.7.12 or higher.
ynh_get_debian_release () {
echo $(lsb_release --codename --short)
}
# Create a directory under /tmp
#
# [internal]
#
# Deprecated helper
#
# usage: ynh_mkdir_tmp
# | ret: the created directory path
ynh_mkdir_tmp() {
ynh_print_warn --message="The helper ynh_mkdir_tmp is deprecated."
ynh_print_warn --message="You should use 'mktemp -d' instead and manage permissions \
properly with chmod/chown."
local TMP_DIR=$(mktemp --directory)
# Give rights to other users could be a security risk.
# But for retrocompatibility we need it. (This helpers is deprecated)
chmod 755 $TMP_DIR
echo $TMP_DIR
}
# Remove a file or a directory securely
#
# usage: ynh_secure_remove --file=path_to_remove
# | arg: -f, --file= - File or directory to remove
#
# Requires YunoHost version 2.6.4 or higher.
ynh_secure_remove () {
# Declare an array to define the options of this helper.
local legacy_args=f
local -A args_array=( [f]=file= )
local file
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
local forbidden_path=" \
/var/www \
/home/yunohost.app"
if [ $# -ge 2 ]
then
ynh_print_warn --message="/!\ Packager ! You provided more than one argument to ynh_secure_remove but it will be ignored... Use this helper with one argument at time."
fi
if [[ -z "$file" ]]
then
ynh_print_warn --message="ynh_secure_remove called with empty argument, ignoring."
elif [[ "$forbidden_path" =~ "$file" \
# Match all paths or subpaths in $forbidden_path
|| "$file" =~ ^/[[:alnum:]]+$ \
# Match all first level paths from / (Like /var, /root, etc...)
|| "${file:${#file}-1}" = "/" ]]
# Match if the path finishes by /. Because it seems there is an empty variable
then
ynh_print_warn --message="Not deleting '$file' because it is not an acceptable path to delete."
elif [ -e "$file" ]
then
rm --recursive "$file"
else
ynh_print_info --message="'$file' wasn't deleted because it doesn't exist."
fi
}
# Extract a key from a plain command output
#
# [internal]
#
# example: yunohost user info tata --output-as plain | ynh_get_plain_key mail
#
# usage: ynh_get_plain_key key [subkey [subsubkey ...]]
# | ret: string - the key's value
#
# Requires YunoHost version 2.2.4 or higher.
ynh_get_plain_key() {
local prefix="#"
local founded=0
# We call this key_ so that it's not caught as
# an info to be redacted by the core
local key_=$1
shift
while read line
do
if [[ "$founded" == "1" ]]
then
[[ "$line" =~ ^${prefix}[^#] ]] && return
echo $line
elif [[ "$line" =~ ^${prefix}${key_}$ ]]
then
if [[ -n "${1:-}" ]]
then
prefix+="#"
key_=$1
shift
else
founded=1
fi
fi
done
}
# Read the value of a key in a ynh manifest file
#
# usage: ynh_read_manifest --manifest="manifest.json" --key="key"
# | arg: -m, --manifest= - Path of the manifest to read
# | arg: -k, --key= - Name of the key to find
# | ret: the value associate to that key
#
# Requires YunoHost version 3.5.0 or higher.
ynh_read_manifest () {
# Declare an array to define the options of this helper.
local legacy_args=mk
local -A args_array=( [m]=manifest= [k]=manifest_key= )
local manifest
local manifest_key
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
if [ ! -e "$manifest" ]; then
# If the manifest isn't found, try the common place for backup and restore script.
manifest="../settings/manifest.json"
fi
jq ".$manifest_key" "$manifest" --raw-output
}
# Read the upstream version from the manifest, or from the env variable $YNH_APP_MANIFEST_VERSION if not given
#
# usage: ynh_app_upstream_version [--manifest="manifest.json"]
# | arg: -m, --manifest= - Path of the manifest to read
# | ret: the version number of the upstream app
#
# The version number in the manifest is defined by <upstreamversion>~ynh<packageversion>
# For example : 4.3-2~ynh3
# This include the number before ~ynh
# In the last example it return 4.3-2
#
# Requires YunoHost version 3.5.0 or higher.
ynh_app_upstream_version () {
# Declare an array to define the options of this helper.
local legacy_args=m
local -A args_array=( [m]=manifest= )
local manifest
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
manifest="${manifest:-}"
if [[ "$manifest" != "" ]] && [[ -e "$manifest" ]];
then
version_key=$(ynh_read_manifest --manifest="$manifest" --manifest_key="version")
else
version_key=$YNH_APP_MANIFEST_VERSION
fi
echo "${version_key/~ynh*/}"
}
# Read package version from the manifest
#
# usage: ynh_app_package_version [--manifest="manifest.json"]
# | arg: -m, --manifest= - Path of the manifest to read
# | ret: the version number of the package
#
# The version number in the manifest is defined by <upstreamversion>~ynh<packageversion>
# For example : 4.3-2~ynh3
# This include the number after ~ynh
# In the last example it return 3
#
# Requires YunoHost version 3.5.0 or higher.
ynh_app_package_version () {
# Declare an array to define the options of this helper.
local legacy_args=m
local -A args_array=( [m]=manifest= )
local manifest
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
version_key=$YNH_APP_MANIFEST_VERSION
echo "${version_key/*~ynh/}"
}
# Checks the app version to upgrade with the existing app version and returns:
#
# - UPGRADE_APP if the upstream app version has changed
# - UPGRADE_PACKAGE if only the YunoHost package has changed
#
# It stops the current script without error if the package is up-to-date
#
# This helper should be used to avoid an upgrade of an app, or the upstream part
# of it, when it's not needed
#
# To force an upgrade, even if the package is up to date,
# you have to set the variable YNH_FORCE_UPGRADE before.
# example: sudo YNH_FORCE_UPGRADE=1 yunohost app upgrade MyApp
#
# usage: ynh_check_app_version_changed
#
# Requires YunoHost version 3.5.0 or higher.
ynh_check_app_version_changed () {
local force_upgrade=${YNH_FORCE_UPGRADE:-0}
local package_check=${PACKAGE_CHECK_EXEC:-0}
# By default, upstream app version has changed
local return_value="UPGRADE_APP"
local current_version=$(ynh_read_manifest --manifest="/etc/yunohost/apps/$YNH_APP_INSTANCE_NAME/manifest.json" --manifest_key="version" || echo 1.0)
local current_upstream_version="$(ynh_app_upstream_version --manifest="/etc/yunohost/apps/$YNH_APP_INSTANCE_NAME/manifest.json")"
local update_version=$(ynh_read_manifest --manifest="../manifest.json" --manifest_key="version" || echo 1.0)
local update_upstream_version="$(ynh_app_upstream_version)"
if [ "$current_version" == "$update_version" ]
then
# Complete versions are the same
if [ "$force_upgrade" != "0" ]
then
ynh_print_info --message="Upgrade forced by YNH_FORCE_UPGRADE."
unset YNH_FORCE_UPGRADE
elif [ "$package_check" != "0" ]
then
ynh_print_info --message="Upgrade forced for package check."
else
ynh_die "Up-to-date, nothing to do" 0
fi
elif [ "$current_upstream_version" == "$update_upstream_version" ]
then
# Upstream versions are the same, only YunoHost package versions differ
return_value="UPGRADE_PACKAGE"
fi
echo $return_value
}
# Compare the current package version against another version given as an argument.
# This is really useful when we need to do some actions only for some old package versions.
#
# example: ynh_compare_current_package_version --comparison lt --version 2.3.2~ynh1
# This example will check if the installed version is lower than (lt) the version 2.3.2~ynh1
#
# Generally you might probably use it as follow in the upgrade script
#
# if ynh_compare_current_package_version --comparaison lt --version 2.3.2~ynh1
# then
# # Do something that is needed for the package version older than 2.3.2~ynh1
# fi
#
# usage: ynh_compare_current_package_version --comparison lt|le|eq|ne|ge|gt
# | arg: --comparison - Comparison type. Could be : lt (lower than), le (lower or equal),
# | eq (equal), ne (not equal), ge (greater or equal), gt (greater than)
# | arg: --version - The version to compare. Need to be a version in the yunohost package version type (like 2.3.1~ynh4)
#
# Return 0 if the evaluation is true. 1 if false.
#
# Requires YunoHost version 3.8.0 or higher.
ynh_compare_current_package_version() {
local legacy_args=cv
declare -Ar args_array=( [c]=comparison= [v]=version= )
local version
local comparison
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
local current_version=$YNH_APP_CURRENT_VERSION
# Check the syntax of the versions
if [[ ! $version =~ '~ynh' ]] || [[ ! $current_version =~ '~ynh' ]]
then
ynh_die "Invalid argument for version."
fi
# Check validity of the comparator
if [[ ! $comparison =~ (lt|le|eq|ne|ge|gt) ]]; then
ynh_die "Invialid comparator must be : lt, le, eq, ne, ge, gt"
fi
# Return the return value of dpkg --compare-versions
dpkg --compare-versions $current_version $comparison $version
}
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