The first argument of this function should be a string to
test, and the second argument should be a path to a test command
taking a % as a placeholder for the file path (will default to the end).
If the command, launched against a tempfile containing the passed string,
returns a non-null value, compilation will abort with a parse error.
The first argument of this function should be a string to
test, and the second argument should be a path to a test command
taking a % as a placeholder for the file path (will default to the end).
If the command, launched against a tempfile containing the passed string,
returns a non-null value, compilation will abort with a parse error.