Arch Linux support

public/detect_linux.sh

@@ -3,9 +3,17 @@
 DISTNAME=unknown
 DISTVER=
 
-if [ -f /etc/solus-release ]; then
+if [ -f /etc/os-release ]; then
+  . /etc/os-release
+  if [ "$ID" == "arch" ]; then
+    DISTNAME=arch
+  fi
+fi
+
+if [ "DISTNAME" = "unknown" ]; then
+  if [ -f /etc/solus-release ]; then
     DISTNAME=solus
-elif [ -f /etc/lsb-release ]; then
+  elif [ -f /etc/lsb-release ]; then
     . /etc/lsb-release
     DISTNAME=$(echo ${DISTRIB_ID} | awk '{print tolower($0)}')
     DISTVER=${DISTRIB_RELEASE}
@@ -25,9 +33,10 @@ elif [ -f /etc/lsb-release ]; then
         DISTVER=
       fi
     fi
-elif [ -f /etc/debian_version ]; then
+  elif [ -f /etc/debian_version ]; then
     DISTNAME=debian
     DISTVER=$(head -1 /etc/debian_version|awk -F. '{print $1}')
+  fi
 fi
 
 echo ${DISTNAME}${DISTVER}