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|
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
module Notmuch where
import qualified Data.ByteString.Lazy as LBS
import qualified Data.ByteString.Lazy.Char8 as LBS8
import qualified Data.Text.Lazy as LT
import qualified Data.Text.Lazy.Encoding as LT
import qualified Network.Mail.Mime as M
import Control.Concurrent
import Control.DeepSeq (rnf)
import Control.Exception
import Data.Aeson.Extends
import Data.Tree
import Notmuch.Class
import Notmuch.Message
import Notmuch.SearchResult
import ParseMail (readMail)
import System.Exit
import System.IO
import System.Process
import TagUtils
-- | Fork a thread while doing something else, but kill it if there's an
-- exception.
--
-- This is important in the cases above because we want to kill the thread
-- that is holding the Handle lock, because when we clean up the process we
-- try to close that handle, which could otherwise deadlock.
--
withForkWait :: IO () -> (IO () -> IO a) -> IO a
withForkWait async body = do
waitVar <- newEmptyMVar :: IO (MVar (Either SomeException ()))
mask $ \restore -> do
tid <- forkIO $ try (restore async) >>= putMVar waitVar
let wait = takeMVar waitVar >>= either throwIO return
restore (body wait) `onException` killThread tid
notmuch :: [String] -> IO LBS.ByteString
notmuch args = do
(_, Just hout, _, ph) <- createProcess (proc "notmuch" args)
{ std_out = CreatePipe }
output <- LBS.hGetContents hout
withForkWait (evaluate $ rnf output) $ \waitOut -> do
---- now write any input
--unless (null input) $
-- ignoreSigPipe $ hPutStr inh input
-- hClose performs implicit hFlush, and thus may trigger a SIGPIPE
--ignoreSigPipe $ hClose inh
-- wait on the output
waitOut
hClose hout
-- wait on the process
_ex <- waitForProcess ph
--return (ex, output)
--case ex of
-- ExitSuccess -> return output
-- ExitFailure r -> processFailedException "readProcess" cmd args r
return output
notmuch' :: [String] -> IO (ExitCode, LBS.ByteString, LBS.ByteString)
notmuch' args = do
(_, Just hout, Just herr, ph) <-
createProcess (proc "notmuch" args)
{ std_out = CreatePipe
, std_err = CreatePipe
}
out <- LBS.hGetContents hout
err <- LBS.hGetContents herr
withForkWait (evaluate $ rnf out) $ \waitOut -> do
withForkWait (evaluate $ rnf err) $ \waitErr -> do
---- now write any input
--unless (null input) $
-- ignoreSigPipe $ hPutStr inh input
-- hClose performs implicit hFlush, and thus may trigger a SIGPIPE
--ignoreSigPipe $ hClose inh
-- wait on the output
waitOut
waitErr
hClose hout
hClose herr
-- wait on the process
exitCode <- waitForProcess ph
return (exitCode, out, err)
notmuchWithInput
:: [String]
-> LBS.ByteString
-> IO (ExitCode, LBS.ByteString, LBS.ByteString)
notmuchWithInput args input = do
(Just hin, Just hout, Just herr, ph) <-
createProcess (proc "notmuch" args)
{ std_in = CreatePipe
, std_out = CreatePipe
, std_err = CreatePipe
}
LBS.hPut hin input
hClose hin
out <- LBS.hGetContents hout
err <- LBS.hGetContents herr
withForkWait (evaluate $ rnf out) $ \waitOut -> do
withForkWait (evaluate $ rnf err) $ \waitErr -> do
---- now write any input
--unless (null input) $
-- ignoreSigPipe $ hPutStr inh input
-- hClose performs implicit hFlush, and thus may trigger a SIGPIPE
--ignoreSigPipe $ hClose inh
-- wait on the output
waitOut
waitErr
hClose hout
hClose herr
-- wait on the process
exitCode <- waitForProcess ph
return (exitCode, out, err)
search :: [String] -> IO (Either String [SearchResult])
search args =
notmuch ("search" : "--format=json" : "--format-version=2" : args)
>>= return . eitherDecodeLenient'
data ReplyTo = ToAll | ToSender
instance Show ReplyTo where
show ToAll = "all"
show ToSender = "sender"
--notmuchReply :: String -> IO (Either String [SearchResult])
notmuchReply :: ReplyTo -> String -> IO LBS.ByteString
notmuchReply replyTo term =
notmuch
[ "reply"
, "--reply-to=" ++ show replyTo
, term
]
-- >>= return . eitherDecodeLenient'
notmuchShow :: String -> IO (Forest Message)
notmuchShow term = do
c' <- notmuch [ "show", "--format=json", "--format-version=2"
, term ]
-- TODO why head?
return $ threadForest $ head $
either error id (eitherDecodeLenient' c')
notmuchShowPart :: String -> Int -> IO (Either String MessagePart)
notmuchShowPart term partId = do
-- TODO handle partId == 0 and partId > N
(exitCode, out, err) <-
notmuch' [ "show", "--format=json", "--format-version=2"
, "--part=" <> show partId
, term ]
return $ case exitCode of
ExitSuccess -> eitherDecodeLenient' out
_ -> Left $ show exitCode <> ": " <> LBS8.unpack err
notmuchShowMail :: String -> IO (Either String M.Mail)
notmuchShowMail term =
notmuch' [ "show", "--format=raw", "--format-version=2", term ]
>>= return . \case
(ExitSuccess, out, _) ->
case LT.decodeUtf8' out of
Right x -> Right (readMail $ LT.toStrict x)
Left ex -> Left $ "meh" ++ show ex
(exitCode, _, err) ->
Left $ "notmuch failed with exit code " ++ show exitCode ++
": " ++ LBS8.unpack err
notmuchTag :: HasNotmuchId a => [TagOp] -> a -> IO ()
notmuchTag tagOps x =
notmuch ("tag" : tagOpsToArgs tagOps ++ [notmuchId x]) >> return ()
|
