427c2e484d
Print template notice on top of autogenerated source files. git-svn-id: https://pandoc.googlecode.com/svn/trunk@1220 788f1e2b-df1e-0410-8736-df70ead52e1b
86 lines
3.6 KiB
Haskell
86 lines
3.6 KiB
Haskell
import Distribution.Simple
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import Distribution.Simple.Setup
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import Distribution.PackageDescription
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import Distribution.Simple.LocalBuildInfo
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import System.FilePath (combine, joinPath, takeFileName)
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import System.Directory (getDirectoryContents, removeFile)
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import System.IO (readFile, writeFile)
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import Control.Monad (foldM)
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import Data.List (isPrefixOf)
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main = defaultMainWithHooks myHooks
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myHooks = defaultUserHooks { postConf = myPostConf, postClean = myPostClean }
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pandocPath = combine "Text" "Pandoc"
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-- Builds Text/Pandoc/ASCIIMathML.hs, Text/Pandoc/Writers/S5.hs, and
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-- Text/Pandoc/Writers/DefaultHeaders.hs from templates and data.
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myPostConf :: Args -> ConfigFlags -> PackageDescription -> LocalBuildInfo -> IO ()
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myPostConf _ configFlags pkgDescription buildInfo = do
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putStrLn "Generating source files from templates..."
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fillAsciiMathMLTemplate
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fillS5WriterTemplate
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fillDefaultHeadersTemplate
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-- Fill templateFile with data in dataFiles and write to outputFile.
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fillTemplate :: [FilePath] -> FilePath -> FilePath -> IO ()
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fillTemplate dataFiles templateFile outputFile = do
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template <- readFile (combine "templates" templateFile)
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filled <- foldM processFile template $ map (combine "templates") dataFiles
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writeTemplate (combine pandocPath outputFile) filled
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fillAsciiMathMLTemplate :: IO ()
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fillAsciiMathMLTemplate =
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fillTemplate ["ASCIIMathML.js.comment", "ASCIIMathML.js.packed"] "ASCIIMathML.hs" "ASCIIMathML.hs"
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fillS5WriterTemplate :: IO ()
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fillS5WriterTemplate =
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let s5Path = joinPath ["ui", "default"]
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files = map (combine s5Path) ["slides.js.comment", "slides.js.packed", "s5-core.css",
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"framing.css", "pretty.css", "opera.css", "outline.css", "print.css"]
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in fillTemplate files "S5.hs" (combine "Writers" "S5.hs")
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fillDefaultHeadersTemplate :: IO ()
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fillDefaultHeadersTemplate = do
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files <- getDirectoryContents (combine "templates" "headers") >>=
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return . map (combine "headers") . filter (\x -> not (x `elem` [".",".."]))
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fillTemplate files "DefaultHeaders.hs" "DefaultHeaders.hs"
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-- Post-clean: remove the files generated from templates.
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myPostClean :: Args -> CleanFlags -> PackageDescription -> Maybe LocalBuildInfo -> IO ()
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myPostClean _ _ _ _ = do
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putStrLn "Removing source files generated from templates:"
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removeGeneratedFile $ joinPath [pandocPath, "ASCIIMathML.hs"]
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removeGeneratedFile $ joinPath [pandocPath, "DefaultHeaders.hs"]
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removeGeneratedFile $ joinPath [pandocPath, "Writers", "S5.hs"]
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-- Remove file and print message.
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removeGeneratedFile :: FilePath -> IO ()
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removeGeneratedFile fpath = do
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putStrLn $ " " ++ fpath
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removeFile fpath
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-- Write the filled template file and print an explanatory message.
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writeTemplate :: FilePath -> String -> IO ()
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writeTemplate outfile contents = do
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putStrLn $ " " ++ outfile
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let warning = "-- This file is generated from a template in the templates subdirectory.\n\
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\-- Modify that file, not this one.\n"
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writeFile outfile (warning ++ contents)
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-- Read contents of fpath and insert in template replacing @fpath@.
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processFile :: String -> FilePath -> IO String
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processFile template fpath = do
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contents <- readFile fpath >>= return . show
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return $ substitute ("@" ++ takeFileName fpath ++ "@") contents template
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-- Replace each occurrence of one sublist in a list with another.
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substitute :: (Eq a) => [a] -> [a] -> [a] -> [a]
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substitute _ _ [] = []
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substitute [] _ lst = lst
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substitute target replacement lst =
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if target `isPrefixOf` lst
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then replacement ++ (substitute target replacement $ drop (length target) lst)
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else (head lst):(substitute target replacement $ tail lst)
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