Merge pull request #476 from pcapriotti/topic/0.18.1

Use layoutPretty instead of layoutSmart when rendering help texts.

CHANGELOG.md

@@ -1,3 +1,15 @@
+## Version 0.18.1.0 (29 May 2023)
+
+- Change pretty printer layout algorithm used.
+
+  The layoutSmart algorithm appears to be extremely slow with some command line
+  sets, to the point where the program appears to hang.
+
+  Fixes issues:
+    * \# 476 - Stack executable 'hangs' with 0.17.1 and 0.18.0.
+
+- Render help text with `AnsiStyle` aware rendering functions.
+
 ## Version 0.18.0.0 (22 May 2023)
 
 - Move to 'prettyprinter` library for pretty printing.

optparse-applicative.cabal

@@ -1,5 +1,5 @@
 name:                optparse-applicative
-version:             0.18.0.0
+version:             0.18.1.0
 synopsis:            Utilities and combinators for parsing command line options
 description:
     optparse-applicative is a haskell library for parsing options
@@ -101,6 +101,7 @@ library
                      , Options.Applicative.Internal
 
   build-depends:       base                            >= 4.5 && < 5
+                     , text                            >= 1.2
                      , transformers                    >= 0.2 && < 0.7
                      , transformers-compat             >= 0.3 && < 0.8
                      , prettyprinter                   >= 1.7 && < 1.8

src/Options/Applicative/Builder.hs

@@ -189,7 +189,7 @@ showDefault = showDefaultWith show
 help :: String -> Mod f a
 help s = optionMod $ \p -> p { propHelp = paragraph s }
 
--- | Specify the help text for an option as a 'Text.PrettyPrint.ANSI.Leijen.Doc'
+-- | Specify the help text for an option as a 'Prettyprinter.Doc AnsiStyle'
 -- value.
 helpDoc :: Maybe Doc -> Mod f a
 helpDoc doc = optionMod $ \p -> p { propHelp = Chunk doc }
@@ -215,7 +215,7 @@ hidden = optionMod $ \p ->
 -- | Apply a function to the option description in the usage text.
 --
 -- > import Options.Applicative.Help
--- > flag' () (short 't' <> style bold)
+-- > flag' () (short 't' <> style (annotate bold))
 --
 -- /NOTE/: This builder is more flexible than its name and example
 -- allude. One of the motivating examples for its addition was to
@@ -402,7 +402,7 @@ briefDesc = InfoMod $ \i -> i { infoFullDesc = False }
 header :: String -> InfoMod a
 header s = InfoMod $ \i -> i { infoHeader = paragraph s }
 
--- | Specify a header for this parser as a 'Text.PrettyPrint.ANSI.Leijen.Doc'
+-- | Specify a header for this parser as a 'Prettyprinter.Doc AnsiStyle'
 -- value.
 headerDoc :: Maybe Doc -> InfoMod a
 headerDoc doc = InfoMod $ \i -> i { infoHeader = Chunk doc }
@@ -411,7 +411,7 @@ headerDoc doc = InfoMod $ \i -> i { infoHeader = Chunk doc }
 footer :: String -> InfoMod a
 footer s = InfoMod $ \i -> i { infoFooter = paragraph s }
 
--- | Specify a footer for this parser as a 'Text.PrettyPrint.ANSI.Leijen.Doc'
+-- | Specify a footer for this parser as a 'Prettyprinter.Doc AnsiStyle'
 -- value.
 footerDoc :: Maybe Doc -> InfoMod a
 footerDoc doc = InfoMod $ \i -> i { infoFooter = Chunk doc }
@@ -420,7 +420,7 @@ footerDoc doc = InfoMod $ \i -> i { infoFooter = Chunk doc }
 progDesc :: String -> InfoMod a
 progDesc s = InfoMod $ \i -> i { infoProgDesc = paragraph s }
 
--- | Specify a short program description as a 'Text.PrettyPrint.ANSI.Leijen.Doc'
+-- | Specify a short program description as a 'Prettyprinter.Doc AnsiStyle'
 -- value.
 progDescDoc :: Maybe Doc -> InfoMod a
 progDescDoc doc = InfoMod $ \i -> i { infoProgDesc = Chunk doc }

src/Options/Applicative/Help/Pretty.hs

@@ -18,15 +18,15 @@ module Options.Applicative.Help.Pretty
 #if !MIN_VERSION_base(4,11,0)
 import           Data.Semigroup ((<>), mempty)
 #endif
+import qualified Data.Text.Lazy as Lazy
 
 import           Prettyprinter hiding (Doc)
 import qualified Prettyprinter as PP
-import qualified Prettyprinter.Render.String as PP
 import           Prettyprinter.Render.Terminal
 
 import           Prelude
 
-type Doc = PP.Doc Prettyprinter.Render.Terminal.AnsiStyle
+type Doc = PP.Doc AnsiStyle
 type SimpleDoc = SimpleDocStream AnsiStyle
 
 linebreak :: Doc
@@ -106,7 +106,7 @@ hangAtIfOver i j d =
 
 renderPretty :: Double -> Int -> Doc -> SimpleDocStream AnsiStyle
 renderPretty ribbonFraction lineWidth
-  = layoutSmart LayoutOptions
+  = layoutPretty LayoutOptions
       { layoutPageWidth = AvailablePerLine lineWidth ribbonFraction }
 
 prettyString :: Double -> Int -> Doc -> String
@@ -115,5 +115,9 @@ prettyString ribbonFraction lineWidth
   . renderPretty ribbonFraction lineWidth
 
 streamToString :: SimpleDocStream AnsiStyle -> String
-streamToString stream =
-  PP.renderShowS stream ""
+streamToString sdoc =
+  let
+    rendered =
+      Prettyprinter.Render.Terminal.renderLazy sdoc
+  in
+    Lazy.unpack rendered