<Diff> element
The <Diff> element defines how to build a command line to compare two values of a parameter.
Syntax
Parent element: <CfgMethod>, <ParameterDef>
The following child elements are supported:
| Child elements | Required | Description |
|---|---|---|
| <Command> | no | Command |
| <Argument> | no | Command-line arguments |
| <Stdin> | no | Stdin arguments |
| <Filter> | no | Filter |
| <Mask> | no | Output capturing mask |
Note: The <Command> element must be defined for
each parameter, either at the <CfgMethod> level or directly
at the <ParameterDef> level.
Usage
The <Diff> element is usually not required, since the framework knows how to compare two parameter values internally based on the type (string, integer, integer-bi, binary, etc.). However, in case the internal comparison is not adapted for a particular parameter, it is possible to use an external command instead.
Example
The following <Diff> element can be used for most parameters, even though using the internal comparison function is more efficient. The <Diff> element uses the diff command to compare two files that contains the two values:
<Diff>
<Command>/usr/bin/diff %f1 %f2; echo $?</Command>
</Diff>Related Information
The <Mask> element.