bootstrap: generate windows scripts

.gitignore

@@ -6,3 +6,5 @@ rebar
 rt.work
 .hgignore
 .eunit
+rebar.cmd
+rebar.ps1

bootstrap

@@ -79,11 +79,15 @@ main(Args) ->
             halt(1)
     end,
 
-    %% Finally, update executable perms for our script
+    %% Finally, update executable perms for our script on *nix,
+    %%  or write out script files on win32.
     case os:type() of
         {unix,_} ->
             [] = os:cmd("chmod u+x rebar"),
             ok;
+        {win32,_} ->
+            write_windows_scripts(),
+            ok;
         _ ->
             ok
     end,
@@ -126,3 +130,18 @@ vcs_info([{Id, Dir, Cmd} | Rest]) ->
         false ->
             vcs_info(Rest)
     end.
+
+write_windows_scripts() ->
+    PowershellScript=
+        "$basedir = Split-Path -Parent $MyInvocation.MyCommand.Path\r\n"
+        "$rebar = Join-Path $basedir \"rebar\"\r\n"
+        "escript.exe $rebar $args\r\n",
+    CmdScript=
+        "@echo off\r\n"
+        "setlocal\r\n"
+        "set rebarscript=%~f0\r\n"
+        "escript.exe \"%rebarscript:.bat=%i\" %*\r\n",
+    file:write_file("rebar.cmd", CmdScript),
+    UTF16BE = {utf16, big},
+    file:write_file("rebar.ps1", [unicode:encoding_to_bom(UTF16BE),
+            unicode:characters_to_binary(PowershellScript, utf8, UTF16BE)]).

rebar.bat

@@ -1,4 +0,0 @@
-@echo off
-setlocal
-set rebarscript=%~f0
-escript.exe "%rebarscript:.bat=%" %*