Update install.sh

fixed typo and cleaned up conditionals

Author: quinkennedy

install.sh

@@ -20,24 +20,23 @@ if [ $os == "Linux" ]; then
 
     #install chromium from source if not available via apt-get
     # Raspbian Jesse does not include chromium in apt-get
-    if dpkg -s chromium; then
-        :
-    else
+    if ! dpkg -s chromium; then
+        # Raspbian Jesse does not have chromium in its repositories
         # adapted from https://medium.com/@icebob/jessie-on-raspberry-pi-2-with-docker-and-chromium-c43b8d80e7e1#6afd
         # files from https://launchpad.net/ubuntu/+source/chromium-browser/
         cfile=$(mktemp)
         wget https://launchpad.net/ubuntu/+archive/primary/+files/chromium-browser_48.0.2564.116-0ubuntu0.15.10.1.1221_armhf.deb -O $cfile
-        fffile=$(mktep)
+        fffile=$(mktemp)
         wget https://launchpad.net/ubuntu/+archive/primary/+files/chromium-codecs-ffmpeg-extra_48.0.2564.116-0ubuntu0.15.10.1.1221_armhf.deb -O $fffile
-        sudo dpkg -i $fffile $cfile
-        #resolve "package old or missing" error
-        sudo apt-get install -f
-        sudo dpkg -i $fffile $cfile
+        if ! sudo dpkg -i $fffile $cfile; then
+            #resolve "package old or missing" error
+            sudo apt-get install -f
+            sudo dpkg -i $fffile $cfile
+        fi
         #clean up
         rm $cfile $fffile
     fi
 
-
     if [ $arq == "armv7l" ]; then
         # on RaspberryPi