使用pandoc作为库来制作PDF

但是，我遇到了困难.我具有以下功能:export :: (MonadIO m) => Pandoc -> m (Either BL.ByteString BL.ByteString)export = liftIO . makePDF "xelatex" writeLaTeX def { writerStandalone = True }在我修改过的燃料的主体中. pdfbytes <- export letter print pdfbytes我得到以下输出:$ stack runghc fuel.hsRun from outside a project, using implicit global project configUsing resolver: lts-3.7 from implicit global project's config file: /home/stevejb/.stack/global/stack.yamlLeft "! Emergency stop.\n<*> /tmp/tex2pdf.8283/input.tex\n \nNo pages of output.\nTranscript written on /tmp/tex2pdf.8283/input.log.\n""Fail"但是，被引用的日志文件不存在.我不确定如何调试它.我已经安装了xelatex.解决方案在#haskell IRC的大力帮助下，我得以使其正常运行.关键是添加我自己的LaTeX模板.因此，可以使用以下内容:export :: (MonadIO m) => String -> Pandoc -> m (Either BL.ByteString BL.ByteString)export tmpl pdoc = liftIO $ makePDF "xelatex" writeLaTeX (def { writerStandalone = True, writerTemplate = tmpl}) pdocgetLetter = do json <- BL.readFile "cng_fuel_chicago.json" let letter = case decode json of Just stations -> createLetter [s | s <- stations, "Voyager" `elem` cardsAccepted s] Nothing -> error "Could not decode JSON" return $ lettermain :: IO ()main = do letter <- getLetter temp <- readFile "template.tex" let str_should_have_something = writeLaTeX (def {writerStandalone = True, writerTemplate = temp}) letter print str_should_have_something mybytes <- export temp letter case mybytes of Right b -> BL.writeFile "mypdf.pdf" b Left _ -> putStrLn "Export error"要获取模板，可以从外壳程序以独立模式使用Pandoc:pandoc -D latex > template.tex此外，在查找默认模板方面，使用堆栈，cabal和系统软件包管理器安装Pandoc可能存在问题.我不确定所有这些如何相互作用.完全包含要点此处. Part of a project I am working on involves creating a PDF, using Pandoc. I have the part of the program which makes a PDF. To figure out how to do this, I am trying to modify fuel.hs from JGM BayHack 2014.However, I am having difficulty. I have the following function:export :: (MonadIO m) => Pandoc -> m (Either BL.ByteString BL.ByteString)export = liftIO . makePDF "xelatex" writeLaTeX def { writerStandalone = True }In the body of my modified fuel.hs, pdfbytes <- export letter print pdfbytesI get the following output:$ stack runghc fuel.hsRun from outside a project, using implicit global project configUsing resolver: lts-3.7 from implicit global project's config file: /home/stevejb/.stack/global/stack.yamlLeft "! Emergency stop.\n<*> /tmp/tex2pdf.8283/input.tex\n \nNo pages of output.\nTranscript written on /tmp/tex2pdf.8283/input.log.\n""Fail"However, the log file that is being referenced does not exist. I am not sure how to debug this. I have xelatex installed. 解决方案 With great help from #haskell IRC, I was able to get it working. The key was to add my own LaTeX template. Thus, one can use the following:export :: (MonadIO m) => String -> Pandoc -> m (Either BL.ByteString BL.ByteString)export tmpl pdoc = liftIO $ makePDF "xelatex" writeLaTeX (def { writerStandalone = True, writerTemplate = tmpl}) pdocgetLetter = do json <- BL.readFile "cng_fuel_chicago.json" let letter = case decode json of Just stations -> createLetter [s | s <- stations, "Voyager" `elem` cardsAccepted s] Nothing -> error "Could not decode JSON" return $ lettermain :: IO ()main = do letter <- getLetter temp <- readFile "template.tex" let str_should_have_something = writeLaTeX (def {writerStandalone = True, writerTemplate = temp}) letter print str_should_have_something mybytes <- export temp letter case mybytes of Right b -> BL.writeFile "mypdf.pdf" b Left _ -> putStrLn "Export error"To get a template, you can use Pandoc in standalone mode from the shell:pandoc -D latex > template.texAlso, there may be an issue with Pandoc installed using stack, using cabal, and using the system package manger, in terms of finding the default templates. I am not sure exactly how all of this interacts.Fully contained gist here. 这篇关于使用pandoc作为库来制作PDF的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！