language-pig

Pig parser in haskell.

Latest on Hackage:0.3.0.1

This package is not currently in any snapshots. If you're interested in using it, we recommend adding it to Stackage Nightly. Doing so will make builds more reliable, and allow stackage.org to host generated Haddocks.

MIT licensed by Elise Huard
Maintained by elise@jabberwocky.eu

language-pig

Parser and pretty printer for the Apache Pig scripting language (http://pig.apache.org/). The current version is implemented using Parsec parser combinators.

Install

Cabal project, now on hackage, so the usual

cabal install language-pig

Or from source

git clone ...
cd language-pig
cabal install

Use

Parse an expression:

parseString :: [Char] -> Root

Returns an AST (type Root is the root node).

Parse a file:

parseFile :: FilePath -> IO PigFile

PigFile contains the Root (of AST) and the file name. If you want just the AST, parseFileForAST would do it.

Pretty print the produced tree:

putStrLn $ prettyPrint tree

So to round it up, if you want to parse and pretty print the parsed AST of a Pig file (using Control.Applicative (<$>))

prettyPrint <$> parseFileForAST "example.pig" >>= putStrLn
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