Capturing stdout, stderr and exit codes

BitRock InstallBuilder provides a built-in feature that makes it possible to retrieve the standard output, standard error and exit code for every application run by the installer (via a <runProgram> or <setInstallerVariableFromScriptOutput> actions). This way, after you execute any of those two actions, the following installer variables will get populated:

program_stdout

program_stderr

program_exit_code

You can make use of them wherever you want in the xml file (just note that if you run another program, the variables will be overwritten with the new values). For instance:

<runProgram>
 <program>program</program>
 <programArguments>argument1 argument2</programArguments>
</runProgram>

<showInfo>
 <text>Program output: ${program_stdout}
Program error: ${program_stderr}
Program exit code: ${program_exit_code}
</text>
</showInfo>

If stdout or stderr are redirected this installer variable will be created but will be empty.