Parameters

Attribute	Type	Description	Required
comparefile	string	The file to check against for the uptodate file. Obsolete. Use instead.	False
failonerror	bool	Determines if task failure stops the build, or is just reported. The default is `true`.	False
if	bool	If `true` then the task will be executed; otherwise, skipped. The default is `true`.	False
propertyexists	string	Used to test whether a property exists. Obsolete. Use instead.	False
propertytrue	string	Used to test whether a property is true. Obsolete. Use instead.	False
targetexists	string	Used to test whether a target exists. Obsolete. Use instead.	False
test	string	Used to test arbitrary boolean expression.	False
unless	bool	Opposite of `NAnt.Core.Task.IfDefined`. If `false` then the task will be executed; otherwise, skipped. The default is `false`.	False
uptodatefile	string	The file to compare if uptodate. Obsolete. Use instead.	False
verbose	bool	Determines whether the task should report detailed build log messages. The default is `false`.	False

Nested elements

The NAnt.Core.Types.FileSet that contains the comparison files for the NAnt.Core.Tasks.IfTask.UpToDateFile(s) check.

The NAnt.Core.Types.FileSet that contains the uptodate files for the NAnt.Core.Tasks.IfTask.CompareFile(s) check.

Check that a property does not exist.

    <ifnot propertyexists="myProp">
    <echo message="myProp does not exist."/>
</if>

Check that a property value is not true.

    <ifnot propertytrue="myProp">
    <echo message="myProp is not true."/>
</if>

Check that a target does not exist.

    <ifnot targetexists="myTarget">
    <echo message="myTarget does not exist."/>
</if>