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{-# LANGUAGE CPP #-}
{-
Copyright (C) 2008 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.PDF
Copyright : Copyright (C) 2006-7 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Functions for producing a PDF file from LaTeX.
-}
module Text.Pandoc.PDF ( saveLaTeXAsPDF ) where
import Data.List ( isInfixOf )
import System.Directory
import System.FilePath ( (</>), (<.>), takeBaseName )
import System.Process ( runProcess, waitForProcess )
import System.Exit
import System.Environment ( getEnvironment )
import Text.Pandoc.Shared ( withTempDir )
import Prelude hiding ( writeFile, readFile, putStrLn )
import System.IO ( stderr, openFile, IOMode (..) )
#ifdef _UTF8STRING
import System.IO.UTF8
#else
import Text.Pandoc.UTF8
#endif
-- | Produce an PDF file from LaTeX.
saveLaTeXAsPDF :: FilePath -- ^ Pathname of PDF file to be produced.
-> FilePath -- ^ Relative directory of source file.
-> String -- ^ LaTeX document.
-> IO ()
saveLaTeXAsPDF destinationPDFPath sourceDirRelative latex = do
-- check for pdflatex and bibtex in path:
latexPathMaybe <- findExecutable "pdflatex"
bibtexPathMaybe <- findExecutable "bibtex"
let latexPath = case latexPathMaybe of
Nothing -> error $ "The 'pdflatex' command, which is needed to build an PDF file, was not found."
Just x -> x
let bibtexPath = case bibtexPathMaybe of
Nothing -> error $ "The 'bibtex' command, which is needed to build an PDF file, was not found."
Just x -> x
sourceDirAbsolute <- getCurrentDirectory >>= return . (</> sourceDirRelative) >>= canonicalizePath
withTempDir "pandoc-pdf" $ \tempDir -> do
env <- getEnvironment
let env' = ("TEXINPUTS", ".:" ++ sourceDirAbsolute ++ ":") : env
let baseName = "input"
writeFile (tempDir </> baseName <.> "tex") latex
let runLatex = runProgram latexPath ["-interaction=nonstopmode", baseName] tempDir env'
let runBibtex = runProgram bibtexPath [baseName] tempDir env'
messages1 <- runLatex
let logPath = tempDir </> baseName <.> "log"
tocExists <- doesFileExist (tempDir </> baseName <.> "toc")
logContents <- readFile logPath
let undefinedRefs = "There were undefined references" `isInfixOf` logContents
let needsBibtex = "itation" `isInfixOf` logContents
if needsBibtex
then runBibtex >>= hPutStr stderr . unlines
else return ()
if tocExists || undefinedRefs
then do
messages2 <- runLatex
logContents' <- readFile logPath
let stillUndefinedRefs = "There were undefined references" `isInfixOf` logContents'
if stillUndefinedRefs
then runLatex >>= hPutStr stderr . unlines
else hPutStr stderr $ unlines messages2
else
hPutStr stderr $ unlines messages1
let pdfPath = tempDir </> baseName <.> "pdf"
pdfExists <- doesFileExist pdfPath
if pdfExists
then copyFile pdfPath destinationPDFPath
else error "The PDF could not be created."
runProgram :: FilePath -- ^ pathname of executable
-> [String] -- ^ arguments
-> FilePath -- ^ working directory
-> [(String, String)] -- ^ environment
-> IO [String]
runProgram cmdPath arguments workingDir env = do
let runOutputPath = workingDir </> "output" <.> "tmp"
runOutput <- openFile runOutputPath WriteMode
ph <- runProcess cmdPath arguments (Just workingDir) (Just env) Nothing (Just runOutput) (Just runOutput)
ec <- waitForProcess ph -- requires compilation with -threaded
case ec of
ExitSuccess -> return []
_ -> do
output <- readFile runOutputPath
if (takeBaseName cmdPath) == "bibtex"
then return $! lines output
else do
return $!
(if "`ucs.sty' not found" `isInfixOf` output
then ["Please install the 'unicode' package from CTAN:",
" http://www.ctan.org/tex-archive/macros/latex/contrib/unicode/"]
else []) ++
(if "`ulem.sty' not found" `isInfixOf` output
then ["Please install the 'ulem' package from CTAN:",
" http://www.ctan.org/tex-archive/macros/latex/contrib/misc/"]
else []) ++
(if "`graphicx.sty' not found" `isInfixOf` output
then ["Please install the 'graphicx' package from CTAN:",
" http://www.ctan.org/tex-archive/macros/latex/required/graphics/"]
else []) ++
(if "`fancyhdr.sty' not found" `isInfixOf` output
then ["Please install the 'fancyhdr' package from CTAN:",
" http://www.ctan.org/tex-archive/macros/latex/contrib/fancyhdr/"]
else []) ++
(if "`array.sty' not found" `isInfixOf` output
then ["Please install the 'array' package from CTAN:",
" http://www.ctan.org/tex-archive/macros/latex/required/tools/"]
else []) ++
(filter isUseful $ lines output)
where isUseful ln = take 1 ln == "!" ||
take 2 ln == "l." ||
"Error" `isInfixOf` ln ||
"error" `isInfixOf` ln
|
