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borgserver_ynh/scripts/_common.sh

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#!/bin/bash
#=================================================
# COMMON VARIABLES
#=================================================
# App package root directory should be the parent folder
PKG_DIR=$(cd ../; pwd)
pkg_dependencies="python3-pip python3-dev libacl1-dev libssl-dev liblz4-dev python-jinja2 python3-setuptools python-virtualenv"
# Install borg with pip if borg is not here
install_borg_with_pip () {
if [ ! -d /opt/borg-env ]; then
virtualenv --python=python3 /opt/borg-env
/opt/borg-env/bin/python /opt/borg-env/bin/pip install borgbackup==1.1.10
echo "#!/bin/bash
/opt/borg-env/bin/python /opt/borg-env/bin/borg \"\$@\"" > /usr/local/bin/borg
chmod a+x /usr/local/bin/borg
fi
}
#=================================================
# COMMON HELPERS
#=================================================
ynh_export () {
local ynh_arg=""
for var in $@;
do
ynh_arg=$(echo "$var" | awk '{print toupper($0)}')
if [ "$var" == "path_url" ]; then
ynh_arg="PATH"
fi
ynh_arg="YNH_APP_ARG_$ynh_arg"
export $var="${!ynh_arg}"
done
}
# Save listed var in YunoHost app settings
# usage: ynh_save_args VARNAME1 [VARNAME2 [...]]
ynh_save_args () {
for var in $@;
do
local setting_var="$var"
if [ "$var" == "path_url" ]; then
setting_var="path"
fi
ynh_app_setting_set $app $setting_var "${!var}"
done
}
# Render templates with Jinja2
#
# 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
# 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
}
ynh_configure () {
ynh_backup_if_checksum_is_different $2
ynh_render_template "${PKG_DIR}/conf/$1.j2" $2
ynh_store_file_checksum $2
}
ynh_read_json () {
sudo python3 -c "import sys, json;print(json.load(open('$1'))['$2'])"
}
ynh_read_manifest () {
if [ -f '../manifest.json' ] ; then
ynh_read_json '../manifest.json' "$1"
else
ynh_read_json '../settings/manifest.json' "$1"
fi
}
# Checks the app version to upgrade with the existing app version and returns:
# - UPGRADE_APP if the upstream app version has changed
# - UPGRADE_PACKAGE if only the YunoHost package has changed
#
## It stops the current script without error if the package is up-to-date
#
# This helper should be used to avoid an upgrade of an app, or the upstream part
# of it, when it's not needed
#
# To force an upgrade, even if the package is up to date,
# you have to set the variable YNH_FORCE_UPGRADE before.
# example: sudo YNH_FORCE_UPGRADE=1 yunohost app upgrade MyApp
# usage: ynh_check_app_version_changed
ynh_check_app_version_changed () {
local force_upgrade=${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 "/etc/yunohost/apps/$YNH_APP_INSTANCE_NAME/manifest.json" "version" || echo 1.0)
local current_upstream_version="${current_version/~ynh*/}"
local update_version=$(ynh_read_manifest "../manifest.json" "version" || echo 1.0)
local update_upstream_version="${update_version/~ynh*/}"
if [ "$current_version" == "$update_version" ] ; then
# Complete versions are the same
if [ "$force_upgrade" != "0" ]
then
echo "Upgrade forced by YNH_FORCE_UPGRADE." >&2
unset YNH_FORCE_UPGRADE
elif [ "$package_check" != "0" ]
then
echo "Upgrade forced for package check." >&2
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
}