ErrNoCompilerLog occurs when we ask for the compiler log of a subject that doesn't have one.

Compilation holds information about one testcase-compiler pairing.

CompileFileset is the set of file paths associated with a compiler output.

CompileResult is a record about an attempt to compile a subject.

Name describes the unique name of a particular instance of the batch compiler.

Result is the base structure for things that represent the result of an external process.

RunResult represents information about a single run of a subject.

Map is shorthand for a map from compiler IDs to compilations.