40 lines
1.6 KiB
Diff
40 lines
1.6 KiB
Diff
diff --git a/Data/GraphViz/Commands.hs b/Data/GraphViz/Commands.hs
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index 20e7dbe..514c29d 100644
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--- a/Data/GraphViz/Commands.hs
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+++ b/Data/GraphViz/Commands.hs
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@@ -63,14 +63,14 @@ import System.IO (Handle, hPutStrLn, hSetBinaryMode, stderr)
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-- -----------------------------------------------------------------------------
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showCmd :: GraphvizCommand -> String
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-showCmd Dot = "dot"
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-showCmd Neato = "neato"
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-showCmd TwoPi = "twopi"
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-showCmd Circo = "circo"
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-showCmd Fdp = "fdp"
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-showCmd Sfdp = "sfdp"
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-showCmd Osage = "osage"
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-showCmd Patchwork = "patchwork"
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+showCmd Dot = "@graphviz@/bin/dot"
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+showCmd Neato = "@graphviz@/bin/neato"
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+showCmd TwoPi = "@graphviz@/bin/twopi"
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+showCmd Circo = "@graphviz@/bin/circo"
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+showCmd Fdp = "@graphviz@/bin/fdp"
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+showCmd Sfdp = "@graphviz@/bin/sfdp"
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+showCmd Osage = "@graphviz@/bin/osage"
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+showCmd Patchwork = "@graphviz@/bin/patchwork"
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-- | The default command for directed graphs.
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dirCommand :: GraphvizCommand
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@@ -312,8 +312,11 @@ runGraphvizCanvas' d = runGraphvizCanvas (commandFor d) d
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-- | Is the Graphviz suite of tools installed? This is determined by
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-- whether @dot@ is available in the @PATH@.
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+--
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+-- Note: With nixpkgs, this will always return 'True' as graphviz'
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+-- store paths are hardcoded instead of looking at @PATH@.
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isGraphvizInstalled :: IO Bool
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-isGraphvizInstalled = liftM isJust . findExecutable $ showCmd Dot
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+isGraphvizInstalled = pure True -- :)
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-- | If Graphviz does not seem to be available, print the provided
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-- error message and then exit fatally.
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