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{-# LANGUAGE NoImplicitPrelude #-}
{-
Copyright (C) 2006-2019 John MacFarlane <jgm@berkeley.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-}
{- |
Module : Text.Pandoc.App.FormatHeuristics
Copyright : Copyright (C) 2006-2019 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley@edu>
Stability : alpha
Portability : portable
Guess the format of a file from its name.
-}
module Text.Pandoc.App.FormatHeuristics
( formatFromFilePaths
) where
import Prelude
import Data.Char (toLower)
import System.FilePath (takeExtension)
-- Determine default reader based on source file extensions.
formatFromFilePaths :: String -> [FilePath] -> String
formatFromFilePaths fallback [] = fallback
formatFromFilePaths fallback (x:xs) =
case formatFromFilePath x of
Just f -> f
Nothing -> formatFromFilePaths fallback xs
-- Determine format based on file extension
formatFromFilePath :: FilePath -> Maybe String
formatFromFilePath x =
case takeExtension (map toLower x) of
".adoc" -> Just "asciidoc"
".asciidoc" -> Just "asciidoc"
".context" -> Just "context"
".ctx" -> Just "context"
".db" -> Just "docbook"
".doc" -> Just "doc" -- so we get an "unknown reader" error
".docx" -> Just "docx"
".dokuwiki" -> Just "dokuwiki"
".epub" -> Just "epub"
".fb2" -> Just "fb2"
".htm" -> Just "html"
".html" -> Just "html"
".icml" -> Just "icml"
".json" -> Just "json"
".latex" -> Just "latex"
".lhs" -> Just "markdown+lhs"
".ltx" -> Just "latex"
".markdown" -> Just "markdown"
".md" -> Just "markdown"
".ms" -> Just "ms"
".muse" -> Just "muse"
".native" -> Just "native"
".odt" -> Just "odt"
".opml" -> Just "opml"
".org" -> Just "org"
".pdf" -> Just "pdf" -- so we get an "unknown reader" error
".pptx" -> Just "pptx"
".roff" -> Just "ms"
".rst" -> Just "rst"
".rtf" -> Just "rtf"
".s5" -> Just "s5"
".t2t" -> Just "t2t"
".tei" -> Just "tei"
".tei.xml" -> Just "tei"
".tex" -> Just "latex"
".texi" -> Just "texinfo"
".texinfo" -> Just "texinfo"
".text" -> Just "markdown"
".textile" -> Just "textile"
".txt" -> Just "markdown"
".wiki" -> Just "mediawiki"
".xhtml" -> Just "html"
".ipynb" -> Just "ipynb"
['.',y] | y `elem` ['1'..'9'] -> Just "man"
_ -> Nothing
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