Revision history for brittany

0.9.0.0 -- December 2017

Change default global config path (use XDG spec) Existing config should still be respected, so this should not break compatibility
Support per-project config
! Slight rework of the commandline interface:
- Support multiple inputs and outputs
- Support inplace-transformation for multiple files via --write-mode=inplace
Implement IndentPolicyLeft - the indentation mode that never adds more than the base indentation for nested parts (no hanging indentation)

(thanks to Evan Borden)
Fix bug that manifested in bad output for (top-level) template haskell splices
Extension support:
- RecordWildCards
- RecursiveDo (was only partially supported previously)
Layouting Bugfixes:
- Properly reproduce parentheses around kind signatures
- Fix issue around promoted lists (example good: '[ 'True] bad: '['True])
- Trim text from exactprint used as workaround for unknown nodes (unsupported extension workaround)
Layouting changes
- Insert spaces around operator in sections

Support for ghc-8.2.1
Bugfixes:
- Fix quadratic performance issue
- Fix special "where" indentation with indentAmount /= 2
- Fix negative literals in patterns
- Support type applications
Accept -h for --help and improve help layouting (via butcher-1.1.0.2)
Add continuous integration via travis (cabal, cabal-new, stack) (brittle due compilation time limit)
Reduce compilation memory usage a bit

Document the high-level design of the program
Improve layouting for many different cases, too many to list here. Brittany still does only reformat top-level type signatures and bindings.
Publish all dependencies on hackage; ghc-exactprint adaptions got merged upstream as well.
Reduce the aggressiveness of horizontal alignment; this is configurable via the lconfig_alignmentLimit and lconfig_alignmentBreakOnMultiline values (config file only for now).
(!) Breaking change to the config file format: The keys previously contained underscore (e.g. _econf_Werror) but do not anymore (econf_Werror). Add config version; also
Move config value conf_errorHandling.econf_CPPMode to conf_preprocessor.ppconf_CPPMode.
Cope with unhandled syntactical constructs more gracefully by falling back on the ghc-exactprint output; Brittany simply won't touch certain subexpressions instead of aborting. This is further configurable via the econf_omit_output_valid_check config value.
Due to improvements to the butcher library: Accept --key=value on commandline (only --key value was supported previously).
Improve testsuite setup: The tests.blt file contains many different testcases that allow quick addition - feel free to report bugs directly by making PRs with additions to that file.
Release under the terms of the AGPLv3

Support stack
Fix --ghc-options handling
Add commandline param to allow shortcut brittany Foo.hs meaning brittany -i Foo.hs

Support --ghc-options
Support user and local config files: Local config file is not mandatory anymore.

Basic and partial implementation for expression/decl/statement/pattern layouting
Prevent exponential behaviour using manual stablenames