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fix: cli: restore workaround to avoid showing escape codes in emacs

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This commit is contained in:
Simon Michael 2023-01-27 10:00:07 -10:00
parent eed8a06906
commit 110711a2a2
1 changed files with 5 additions and 1 deletions
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6
hledger-lib/Hledger/Utils/IO.hs
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@ -260,7 +260,11 @@ terminalFgColor = terminalColor Foreground
{-# NOINLINE terminalColor #-}
terminalColor :: ConsoleLayer -> Maybe (RGB Float)
terminalColor layer = unsafePerformIO $ do
fmap fractionalRGB <$> getLayerColor layer -- safe to run on non-interactive/dumb terminal
-- getLayerColor is not safe to run in emacs shell buffers with TERM=xterm-256color eg,
-- it prints escape codes; prevent that for now
inemacs <- not.null <$> lookupEnv "INSIDE_EMACS"
if inemacs then return Nothing
else fmap fractionalRGB <$> getLayerColor layer -- getLayerColor is safe to run in non-interactive terminal
where
fractionalRGB :: (Fractional a) => RGB Word16 -> RGB a
fractionalRGB (RGB r g b) = RGB (fromIntegral r / 65535) (fromIntegral g / 65535) (fromIntegral b / 65535) -- chatgpt