Non-hardcoded debian release

[zenonp]

The piaware builder supports the three latest debian versions. This adds support for all three of them.

--- install-piaware.sh.orig     2020-11-04 16:55:51.362241828 +0200
+++ install-piaware.sh  2020-11-04 17:09:28.592031302 +0200
@@ -1,5 +1,13 @@
 #!/bin/bash
 
+DEBV=`sed 's/\..*//' /etc/debian_version`
+case $DEBV in
+ 10) DEB=buster;;
+ 9) DEB=stretch;;
+ 8) DEB=jessie;;
+ *) echo "Debian version unknown or too old, exiting"; exit;;
+esac
+
 INSTALL_DIRECTORY=${PWD}
 
 echo -e "\e[32mUpdating\e[39m"
@@ -16,8 +24,8 @@
 git clone http://github.com/flightaware/tcltls-rebuild.git  
 echo -e "\e[32mbuilding tcl-tls package \e[39m"
 cd  ${INSTALL_DIRECTORY}/tcltls-rebuild
-./prepare-build.sh buster
-cd package-buster
+./prepare-build.sh $DEB
+cd package-$DEB
 sudo dpkg-buildpackage -b --no-sign
 echo -e "\e[32mInstalling tcl-tls package \e[39m"
 cd ../
@@ -37,8 +45,8 @@
 
 echo -e "\e[32mBuilding the piaware package \e[39m"
 cd ${INSTALL_DIRECTORY}/piaware_builder
-sudo ./sensible-build.sh buster
-cd ${INSTALL_DIRECTORY}/piaware_builder/package-buster
+sudo ./sensible-build.sh $DEB
+cd ${INSTALL_DIRECTORY}/piaware_builder/package-$DEB
 sudo dpkg-buildpackage -b --no-sign 
 
 echo -e "\e[32mInstalling piaware package\e[39m"