Show HN: Static Analysis Tool for Dockerfiles in Haskell

Re:Show HN: Static Analysis Tool for Dockerfiles in Haskell by morgenkaffee on Tuesday January 12, 2016 @10:37AM (#10887984)

I can only encourage to use Haskell for such kinds of problems. This was my first Haskell program and I was productive quite fast thanks to "Learn you a Haskell" and the great Parsec library for parsing the Dockerfile.

If you are an experienced Haskeller I would be very glad if you look over the project and problems in an issue. Because mostly I have no idea whether what I am doing is idiomatic or not.

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Re:Show HN: Static Analysis Tool for Dockerfiles in Haskell by boothead on Tuesday January 12, 2016 @04:15PM (#10890459)

The code looks good. One thing you might want to consider is using applicative style for parsing. So

  taggedImage :: Parser BaseImage
  taggedImage = do
    name <- many (noneOf ":")
    reservedOp ":"
    tag <- many (noneOf "\n")
    return $ TaggedImage name tag

Would end up something like:

  taggedImage :: Parser BaseImage
  taggedImage = TaggedImage <$> (many (noneOf "\n") <* reservedOp ":")
                            <*> (many (noneOf "\n")

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