Use GitHub API to retrieve the release download url

Dockerfile

@@ -23,7 +23,8 @@ php-mbstring \
 php-xml \
 php-apcu-bc \
 cron \
-wget
+wget \
+jq
 
 #Copie et execution du script pour l'installation et l'initialisation de GLPI
 COPY glpi-start.sh /opt/

glpi-start.sh

@@ -8,8 +8,8 @@ if [[ -z "${TIMEZONE}" ]]; then echo "TIMEZONE is unset";
 else echo "date.timezone = \"$TIMEZONE\"" > /etc/php/7.0/apache2/conf.d/timezone.ini;
 fi
 
-SRC_GLPI="https://github.com/glpi-project/glpi/releases/download/${VERSION_GLPI}/glpi-${VERSION_GLPI}.tgz"
-TAR_GLPI=glpi-${VERSION_GLPI}.tgz
+SRC_GLPI=$(curl -s https://api.github.com/repos/glpi-project/glpi/releases/tags/${VERSION_GLPI} | jq .assets[0].browser_download_url | tr -d \")
+TAR_GLPI=$(basename ${SRC_GLPI})
 FOLDER_GLPI=glpi/
 FOLDER_WEB=/var/www/html/
 
@@ -21,7 +21,7 @@ then
 fi
 
 #Téléchargement et extraction des sources de GLPI
-if [ "$(ls ${FOLDER_WEB}${FOLDER_GLPI})" ];
+if [ -d "${FOLDER_WEB}${FOLDER_GLPI}" ];
 then
 	echo "GLPI is already installed"
 else