# Default stylish-haskell configuration file in Serokell. # It's based on default config provided by `stylish-haskell --defaults` but has some changes # ================================== # The stylish-haskell tool is mainly configured by specifying steps. These steps # are a list, so they have an order, and one specific step may appear more than # once (if needed). Each file is processed by these steps in the given order. steps: # Convert some ASCII sequences to their Unicode equivalents. This is disabled # by default. # - unicode_syntax: # # In order to make this work, we also need to insert the UnicodeSyntax # # language pragma. If this flag is set to true, we insert it when it's # # not already present. You may want to disable it if you configure # # language extensions using some other method than pragmas. Default: # # true. # add_language_pragma: true # Align the right hand side of some elements. This is quite conservative # and only applies to statements where each element occupies a single # line. - simple_align: cases: true top_level_patterns: true records: true # Import cleanup - imports: # There are different ways we can align names and lists. # # - global: Align the import names and import list throughout the entire # file. # # - file: Like global, but don't add padding when there are no qualified # imports in the file. # # - group: Only align the imports per group (a group is formed by adjacent # import lines). # # - none: Do not perform any alignment. # # Default: global. align: none # The following options affect only import list alignment. # # List align has following options: # # - after_alias: Import list is aligned with end of import including # 'as' and 'hiding' keywords. # # > import qualified Data.List as List (concat, foldl, foldr, head, # > init, last, length) # # - with_alias: Import list is aligned with start of alias or hiding. # # > import qualified Data.List as List (concat, foldl, foldr, head, # > init, last, length) # # - new_line: Import list starts always on new line. # # > import qualified Data.List as List # > (concat, foldl, foldr, head, init, last, length) # # Default: after_alias list_align: after_alias # Right-pad the module names to align imports in a group: # # - true: a little more readable # # > import qualified Data.List as List (concat, foldl, foldr, # > init, last, length) # > import qualified Data.List.Extra as List (concat, foldl, foldr, # > init, last, length) # # - false: diff-safe # # > import qualified Data.List as List (concat, foldl, foldr, init, # > last, length) # > import qualified Data.List.Extra as List (concat, foldl, foldr, # > init, last, length) # # Default: true # # Note: we intentionally disable it to make diffs smaller and reduce # number of merge conflicts. pad_module_names: false # Long list align style takes effect when import is too long. This is # determined by 'columns' setting. # # - inline: This option will put as much specs on same line as possible. # # - new_line: Import list will start on new line. # # - new_line_multiline: Import list will start on new line when it's # short enough to fit to single line. Otherwise it'll be multiline. # # - multiline: One line per import list entry. # Type with constructor list acts like single import. # # > import qualified Data.Map as M # > ( empty # > , singleton # > , ... # > , delete # > ) # # Default: inline long_list_align: inline # Align empty list (importing instances) # # Empty list align has following options # # - inherit: inherit list_align setting # # - right_after: () is right after the module name: # # > import Vector.Instances () # # Default: inherit empty_list_align: inherit # List padding determines indentation of import list on lines after import. # This option affects 'long_list_align'. # # - : constant value # # - module_name: align under start of module name. # Useful for 'file' and 'group' align settings. list_padding: 4 # Separate lists option affects formatting of import list for type # or class. The only difference is single space between type and list # of constructors, selectors and class functions. # # - true: There is single space between Foldable type and list of it's # functions. # # > import Data.Foldable (Foldable (fold, foldl, foldMap)) # # - false: There is no space between Foldable type and list of it's # functions. # # > import Data.Foldable (Foldable(fold, foldl, foldMap)) # # Default: true separate_lists: true # Space surround option affects formatting of import lists on a single # line. The only difference is single space after the initial # parenthesis and a single space before the terminal parenthesis. # # - true: There is single space associated with the enclosing # parenthesis. # # > import Data.Foo ( foo ) # # - false: There is no space associated with the enclosing parenthesis # # > import Data.Foo (foo) # # Default: false space_surround: false # Language pragmas - language_pragmas: # We can generate different styles of language pragma lists. # # - vertical: Vertical-spaced language pragmas, one per line. # # - compact: A more compact style. # # - compact_line: Similar to compact, but wrap each line with # `{-#LANGUAGE #-}'. # # Default: vertical. style: vertical # stylish-haskell can detect redundancy of some language pragmas. If this # is set to true, it will remove those redundant pragmas. Default: true. remove_redundant: true # Replace tabs by spaces. This is disabled by default. # - tabs: # # Number of spaces to use for each tab. Default: 8, as specified by the # # Haskell report. # spaces: 8 # Remove trailing whitespace - trailing_whitespace: {} # A common setting is the number of columns (parts of) code will be wrapped # to. Different steps take this into account. Default: 80. # # Note: we set it to 100 because it reduces verbosity of diffs and # number of conflicts when we merge something. columns: 100 # By default, line endings are converted according to the OS. You can override # preferred format here. # # - native: Native newline format. CRLF on Windows, LF on other OSes. # # - lf: Convert to LF ("\n"). # # - crlf: Convert to CRLF ("\r\n"). # # Default: native. newline: native # These syntax-affecting language extensions are enabled so that # stylish-haskell wouldn't fail with parsing errors when processing files # in projects that have those extensions enabled in the .cabal file # rather than locally. # # To my best knowledge, no harm should result from enabling an extension # that isn't actually used in the file/project. —@neongreen language_extensions: - BangPatterns - ConstraintKinds - DataKinds - DefaultSignatures - DeriveDataTypeable - DeriveGeneric - FlexibleContexts - FlexibleInstances - FunctionalDependencies - GADTs - GeneralizedNewtypeDeriving - LambdaCase - MultiParamTypeClasses - MultiWayIf - NoImplicitPrelude - OverloadedStrings - RecordWildCards - ScopedTypeVariables - StandaloneDeriving - TemplateHaskell - TupleSections - TypeApplications - TypeFamilies - ViewPatterns