At the command line, the usual way to run Beyond Compare is
bcomp.exe @nameofmyscript.bc somefile.txt otherfile.txt
in Linux or Mac:
bcomp @nameofmyscript.bc somefile.txt otherfile.txt
The easiest procedure is to go to Scooter's support page and shop around for a script that seems similar. Here is a four line script, followed by the syntax for running it in Windows.
.In the example above, the ampersand is used to continue a long command on the next line. The first line tells what we want to do (make a report of the differences in something), the second line is the report format, the third line says that we want the report to print to a text file called wipe.out. The fourth line "tigers1 <--> tigers2" indicates we have made this comparison before so the file specifics are in a saved session done earlier in the Beyond Compare GUI.
Here is a five line script, followed by the syntax for running it in Linux.
In the example above we use %1, %2 to pass in command line arguments, in this case, the folders to be compared.
One general caveat for command line scripting of Beyond Compare: not all features from the GUI are possible as a script. BC was built to be a GUI program. The scripting is a tiny subset of the BC GUI commands.