{-# LANGUAGE CPP #-}
#if (defined(MIN_VERSION_base) && MIN_VERSION_base(4,8,0))
#else
import Control.Applicative ((<$>), (<*>))
#endif
import Control.Monad (when, unless)
import qualified Data.ByteString.Char8 as B
import Data.Char (isDigit, toLower)
import Data.List (intercalate)
import Data.Maybe
import Data.Semigroup ((<>))
import Data.Text (Text)
import qualified Data.Text as T
import Network.HTTP.Client (newManager)
import Network.HTTP.Client.TLS (tlsManagerSettings)
import Network.HTTP.Types (decodePathSegments, extractPath)
import Network.HTTP.Directory
import Options.Applicative (auto, fullDesc, header, optional, progDescDoc)
import qualified Options.Applicative.Help.Pretty as P
import Paths_fedora_img_dl (version)
import SimpleCmd (cmd_, error')
import SimpleCmdArgs
import System.Directory (createDirectoryIfMissing, doesDirectoryExist,
doesFileExist, getPermissions, removeFile,
setCurrentDirectory, writable)
import System.Environment.XDG.UserDir (getUserDir)
import System.FilePath (joinPath, takeExtension, takeFileName, (</>), (<.>))
import System.Posix.Files (createSymbolicLink, fileSize, getFileStatus,
readSymbolicLink)
import Text.Read
import qualified Text.ParserCombinators.ReadP as R
import qualified Text.ParserCombinators.ReadPrec as RP
data FedoraEdition = Cloud
| Container
| Everything
| Server
| Silverblue
| Workstation
deriving (Show, Enum, Bounded)
instance Read FedoraEdition where
readPrec = do
s <- look
let e = map toLower s
editionMap =
map (\ ed -> (map toLower (show ed), ed)) [minBound..maxBound]
res = lookup e editionMap
case res of
Nothing -> error' "unknown edition" >> RP.pfail
Just ed -> RP.lift (R.string e) >> return ed
main :: IO ()
main =
let pdoc = Just $ P.text "Tool for downloading Fedora iso file images."
P.<$$> P.text "RELEASE can be 'rawhide', 'respin', 'beta' or release version" in
simpleCmdArgsWithMods (Just version) (fullDesc <> header "Fedora iso downloader" <> progDescDoc pdoc) $
findISO
<$> optional (strOptionWith 'm' "mirror" "HOST" "default https://download.fedoraproject.org")
<*> switchWith 'n' "dry-run" "Don't actually download anything"
<*> strOptionalWith 'a' "arch" "ARCH" "architecture (default x86_64)" "x86_64"
<*> optionalWith auto 'e' "edition" "EDITION" "Fedora edition: workstation [default], server, ..." Workstation
<*> strArg "RELEASE"
findISO :: Maybe String -> Bool -> String -> FedoraEdition -> String -> IO ()
findISO mhost dryrun arch edition tgtrel = do
let (mlocn, relpath, mprefix, mrelease) =
case tgtrel of
"rawhide" -> (Nothing, "development/rawhide", Nothing, Just "Rawhide")
-- FIXME: version hardcoding for respin, beta, and 30
"respin" -> (Just "https://dl.fedoraproject.org", "pub/alt/live-respins/", Just "F29-WORK-x86_64", Nothing)
"beta" -> (Nothing ,"releases/test/30_Beta", Nothing, Just "30_Beta") -- FIXME: hardcoding
"30" -> (Nothing, "development/30", Nothing, Just "30") -- FIXME: hardcoding
rel | all isDigit rel -> (Nothing, "releases" </> rel, Nothing, Just rel)
_ -> error' "Unknown release"
when (isJust mlocn && isJust mhost && mlocn /= mhost) $
error' "Cannot specify host for this image"
let host = fromMaybe "https://download.fedoraproject.org" $
if isJust mlocn then mlocn else mhost
toppath = if null ((decodePathSegments . extractPath) (B.pack host))
then "pub/fedora/linux"
else ""
url = if isJust mlocn then host </> relpath else joinPath [host, toppath, relpath, show edition, arch, editionMedia edition <> "/"]
prefix = fromMaybe (intercalate "-" ([editionPrefix edition, arch] <> maybeToList mrelease)) mprefix
(fileurl, remotesize) <- findURL url prefix
dlDir <- getUserDir "DOWNLOAD"
if dryrun
then do
dirExists <- doesDirectoryExist dlDir
when dirExists $ setCurrentDirectory dlDir
else do
createDirectoryIfMissing False dlDir
setCurrentDirectory dlDir
let localfile = takeFileName fileurl
symlink = dlDir </> prefix <> "-latest" <.> takeExtension fileurl
exists <- doesFileExist localfile
if exists
then do
filestatus <- getFileStatus localfile
let localsize = fileSize filestatus
if Just (fromIntegral localsize) == remotesize
then do
putStrLn "File already fully downloaded"
updateSymlink localfile symlink
else do
canwrite <- writable <$> getPermissions localfile
unless canwrite $ error' "file does have write permission, aborting!"
downloadFile fileurl
updateSymlink localfile symlink
else do
downloadFile fileurl
updateSymlink localfile symlink
where
findURL :: String -> String -> IO (String, Maybe Integer)
findURL url prefix = do
mgr <- newManager tlsManagerSettings
redirect <- httpRedirect mgr url
let finalUrl = maybe url B.unpack redirect
hrefs <- httpDirectory mgr finalUrl
let mfile = listToMaybe $ filter (T.pack prefix `T.isPrefixOf`) hrefs :: Maybe Text
case mfile of
Nothing ->
error' $ "not found " <> finalUrl
Just file -> do
let finalfile = finalUrl </> T.unpack file
putStrLn finalfile
size <- httpFileSize mgr finalfile
return (finalfile, size)
updateSymlink :: FilePath -> FilePath -> IO ()
updateSymlink target symlink =
unless dryrun $ do
symExists <- doesFileExist symlink
if symExists
then do
linktarget <- readSymbolicLink symlink
when (linktarget /= target) $ do
removeFile symlink
createSymbolicLink target symlink
else createSymbolicLink target symlink
putStrLn $ unwords [symlink, "->", target]
downloadFile :: String -> IO ()
downloadFile url =
unless dryrun $ cmd_ "curl" ["-C", "-", "-O", url]
editionPrefix :: FedoraEdition -> String
editionPrefix Workstation = "Fedora-Workstation-Live"
editionPrefix Server = "Fedora-Server-dvd"
editionPrefix Silverblue = "Fedora-Silverblue-ostree"
editionPrefix Everything = "Fedora-Everything-netinst"
editionPrefix Container = "Fedora-Container-Base"
editionPrefix _ = error' "Edition not yet supported"
editionMedia :: FedoraEdition -> String
editionMedia Container = "images"
editionMedia _ = "iso"