From 371f9b708478700992a74864985cfea0af2fd4c3 Mon Sep 17 00:00:00 2001
From: Albert Krewinkel <albert@zeitkraut.de>
Date: Tue, 3 Oct 2017 20:45:11 +0200
Subject: pandoc.lua: use wrapper funciton for pipe command

The pipe command is wrapped in a lua function, throwing a lua error if
the command returns with an error. A wrapper is needed as Haskell
functions exposed to lua may not throw lua errors due to limitations of
hslua.

The error handling is written such that a table can be returned as an
error object in the future. This is potentially useful when finer
control is required while catching the error in lua code. Current
limitations of hslua require error objects to be strings.
---
 src/Text/Pandoc/Lua/PandocModule.hs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/Text/Pandoc/Lua')

diff --git a/src/Text/Pandoc/Lua/PandocModule.hs b/src/Text/Pandoc/Lua/PandocModule.hs
index c689edc4e..f9b072dff 100644
--- a/src/Text/Pandoc/Lua/PandocModule.hs
+++ b/src/Text/Pandoc/Lua/PandocModule.hs
@@ -63,7 +63,7 @@ pushPandocModule datadir = do
   script <- liftIO (pandocModuleScript datadir)
   status <- Lua.loadstring script
   unless (status /= Lua.OK) $ Lua.call 0 1
-  addFunction "pipe" pipeFn
+  addFunction "_pipe" pipeFn
   addFunction "_read" readDoc
   addFunction "sha1" sha1HashFn
 
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