Check for Erlang before proceeding

install

@@ -6,6 +6,15 @@ bin="$HOME"/bin
 cd "$(dirname $(realpath $0))"
 chmod +x uninstall
 
+if erl=$(command -v erl)
+  then
+    echo "Erlang found at $erl"
+  else
+    echo "Could not find an Erlang installation!"
+    echo "Erlang must be installed and available in \$PATH to proceed."
+    exit 95
+fi
+
 if [ -d "$zomp_dir" ]
   then
     echo "Installation directory $zomp_dir already exists. Aborting."
@@ -28,12 +37,17 @@ fi
 
 for rc in "$HOME/.profile" "$HOME/.bashrc" "$HOME/.bash_profile"
   do
-    if grep -q "PATH=\"\$HOME/bin:\$PATH\"" "$rc"
+    if [ -f "$rc" ]
       then
-        echo "Path adjustment found in $rc."
+        if grep -q "PATH=\"\$HOME/bin:\$PATH\"" "$rc"
+          then
+            echo "Path adjustment found in $rc."
+          else
+            echo "Path adjustment not found in $rc. Adding it."
+            echo "export PATH=\"\$HOME/bin:\$PATH\"" >> "$rc"
+        fi
       else
-        echo "Path adjustment not found in $rc. Adding it."
-        echo "export PATH=\"\$HOME/bin:\$PATH\"" >> "$rc"
+        echo "No $rc is present. Skipping."
     fi
   done