Script now provides basic (un)install functionality

Author: chyndman

Elixir.iss

@@ -1,5 +1,22 @@
+[Setup]
+AppName=Elixir
+AppVersion=0.14.1
+DefaultDirName={sd}\Elixir
+DefaultGroupName=Elixir
+
 [Icons]
 Name: "{group}\Elixir"; Filename: "{app}\bin\iex.bat"; WorkingDir: "{userdocs}"; IconFilename: "{app}\drop.ico"
+Name: "{group}\Uninstall Elixir"; Filename: "{uninstallexe}"; IconFilename: "{app}\drop_gs.ico"
 
 [Files]
-Source: "drop.ico"; DestDir: "{app}"; Flags: onlyifdoesntexist
+Source: "Precompiled\*"; DestDir: "{app}"; Flags: createallsubdirs recursesubdirs
+Source: "assets\drop.ico"; DestDir: "{app}"
+Source: "assets\drop_gs.ico"; DestDir: "{app}"
+
+[Code]
+function ErlangIsInstalled: Boolean;
+var
+  ResultCode: Integer;
+begin
+  Result := Exec('erl.exe', '+V', '', SW_HIDE, ewWaitUntilTerminated, ResultCode)
+end;