Disclaimer: Please note that this code is largely experimental. It should probably be refactored, receive a proper test suite and build system configuration, and have a looking over by someone with more haskell experience. There also does not seem to be an authoritative clausewitz language spec, so support may be incomplete as development used only stellaris/CK2/EU4 sources.

Paradox Interactive's Clausewitz Engine uses a custem plain-text file format in its game files. The use of a format unique to the engine makes automated processing and analysis of these files difficult. As a result, this project aims to implement a format conversion to (and from) json, which should simplify working with and building tooling for these files considerably.

These features are currently implemented:

• clausewitz source parser (lossless)
• JSON DSL emitter (lossy)

Notable missing features are:

• proper handling of source encoding (affects eu4, ck2)
• clausewitz DSL emitter
• JSON DSL emitter (lossless)

As the structure of clausewitz files is somewhat more expressive than json types, the json conversion must use some extra semantics to fully represent clausewitz files.

Extra datatypes are handled via string prefixes as follows:

• literals ("FOO_BAR") → !lit:FOO_BAR
• variables (… = @foo) → !var:foo
• dates (2200.00.00) → !date:YYYY-MM-DD
• comparisons ({ a >= b }) → "a": { ">=": "b" }

Furthermore, some transformations are applied:

• use of (defined) variables is replaced by that variables value where possible
• unused variable definitions are dropped
• empty maps {} are interpreted as empty lists ([]), as empty maps and empty lists are otherwise ambiguous
• repeated definitions with the same name become have their values merged into a list under that name
• clausewitz files are represented as a list of definitions

Test sets and examples are provided in test/raw and test/json.