Move zip downloading into IDP library

Author: chyndman

Elixir.iss

@@ -1,3 +1,5 @@
+#include <idp.iss>
+
 [Setup]
 AppName=Elixir
 AppVerName=Elixir
@@ -9,9 +11,15 @@ Name: "{group}\Elixir"; Filename: "{app}\bin\iex.bat"; WorkingDir: "{userdocs}";
 Name: "{group}\Uninstall Elixir"; Filename: "{uninstallexe}"; IconFilename: "{app}\drop_gs.ico"
 
 [Files]
-Source: "Precompiled\*"; DestDir: "{app}"; Flags: createallsubdirs recursesubdirs
 Source: "assets\drop.ico"; DestDir: "{app}"
 Source: "assets\drop_gs.ico"; DestDir: "{app}"
+Source: "extract-zip.ps1"; DestDir: "{app}"; Flags: deleteafterinstall
+
+[Run]
+Filename: "powershell.exe"; Parameters: "-File .\extract-zip.ps1 {tmp}\Precompiled.zip"; WorkingDir: "{app}"; Flags: waituntilterminated runhidden; StatusMsg: "Extracting..."
+
+[UninstallDelete]
+Type: filesandordirs; Name: "{app}"
 
 [Code]
 function ErlangIsInstalled: Boolean;
@@ -20,3 +28,9 @@ var
 begin
   Result := Exec('erl.exe', '+V', '', SW_HIDE, ewWaitUntilTerminated, ResultCode)
 end;
+
+procedure InitializeWizard();
+begin
+  idpAddFile('https://github.com/elixir-lang/elixir/releases/download/v0.14.1/Precompiled.zip', ExpandConstant('{tmp}\Precompiled.zip'));
+  idpDownloadAfter(wpReady);
+end;

extract-zip.ps1

@@ -0,0 +1,9 @@
+$cd = (split-path $MyInvocation.MyCommand.Path -parent)
+$zipPath = $args[0]
+Write-Host " * Extracting files into $cd..." -foregroundcolor "green"
+$shell = New-Object -com Shell.Application
+$zipFile = $shell.NameSpace($zipPath)
+foreach($item in $zipFile.items())
+{
+	$shell.Namespace($cd).copyhere($item)
+}