如何调试在Javascript中实现的MSI自定义操作？

Question

我很难搞清楚为什么我的Javascript自定义操作失败。

我以为我在WIX.chm文件中看到了一个关于调试的话题;现在我找不到它了。

Q1
是否有关于如何调试Javascript或VBScript自定义操作的文档？

Q2
有没有办法发出一些内容从定制动作MSI日志？

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附录：
Some people think script is the wrong tool for writing CAs。
我不同意。我认为Javascript is a very good tool for the job。

Answer 1

对于该文档，请查找Session.Message。

要发出的邮件进入从一个Javascript自定义操作MSI日志，请按照以下样板代码：

// 
// CustomActions.js 
// 
// Template for WIX Custom Actions written in Javascript. 
// 
// 
// Mon, 23 Nov 2009 10:54 
// 
// =================================================================== 


// http://msdn.microsoft.com/en-us/library/sfw6660x(VS.85).aspx 
var Buttons = { 
     OkOnly   : 0, 
     OkCancel   : 1, 
     AbortRetryIgnore : 2, 
     YesNoCancel  : 3 
}; 

var Icons = { 
     Critical   : 16, 
     Question   : 32, 
     Exclamation  : 48, 
     Information  : 64 
}; 

var MsgKind = { 
     Error   : 0x01000000, 
     Warning   : 0x02000000, 
     User    : 0x03000000, 
     Log    : 0x04000000 
}; 

// http://msdn.microsoft.com/en-us/library/aa371254(VS.85).aspx 
var MsiActionStatus = { 
     None    : 0, 
     Ok    : 1, // success 
     Cancel   : 2, 
     Abort   : 3, 
     Retry   : 4, // aka suspend? 
     Ignore   : 5 // skip remaining actions; this is not an error. 
}; 


function MyCustomActionInJavascript() { 
    try { 
     LogMessage("Hello from MyCustomActionInJavascript"); 
     // ...do work here... 
     LogMessage("Goodbye from MyCustomActionInJavascript"); 
    } 
    catch (exc1) { 
     Session.Property("CA_EXCEPTION") = exc1.message ; 
     LogException(exc1); 
     return MsiActionStatus.Abort; 
    } 
    return MsiActionStatus.Ok; 
} 

// Pop a message box. also spool a message into the MSI log, if it is enabled. 
function LogException(exc) { 
    var record = Session.Installer.CreateRecord(0); 
    record.StringData(0) = "CustomAction: Exception: 0x" + decimalToHexString(exc.number) + " : " + exc.message; 
    Session.Message(MsgKind.Error + Icons.Critical + Buttons.btnOkOnly, record); 
} 


// spool an informational message into the MSI log, if it is enabled. 
function LogMessage(msg) { 
    var record = Session.Installer.CreateRecord(0); 
    record.StringData(0) = "CustomAction:: " + msg; 
    Session.Message(MsgKind.Log, record); 
} 


// popup a msgbox 
function AlertUser(msg) { 
    var record = Session.Installer.CreateRecord(0); 
    record.StringData(0) = msg; 
    Session.Message(MsgKind.User + Icons.Information + Buttons.btnOkOnly, record); 
} 

// Format a number as hex. Quantities over 7ffffff will be displayed properly. 
function decimalToHexString(number) { 
    if (number < 0) 
     number = 0xFFFFFFFF + number + 1; 
    return number.toString(16).toUpperCase(); 
}