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ghup/lib/GHup.hs

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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE TypeFamilies #-}
{-# OPTIONS_GHC -Wno-orphans #-}
module GHup
(
-- * Types
ForkResult(..)
, CloneMethod(..)
, ProcessError(..)
, Settings(..)
-- * Settings
, getSettings
, writeSettings
-- * Github / Git actions
, prepareRepoForPR'
, prepareRepoForPR
, forkRepository
, cloneRepository
, setUpstream
, createBranch
, deleteFork'
, deleteFork
, getForks
-- * Parsers
, parseURL
, ghURLParser
-- * Utils
, _info
, _warn
, _err
)
where
import Control.Applicative
import Control.Exception.Safe
import Control.Monad.Except hiding ( fail )
import Control.Monad.Fail
import Control.Monad.Reader hiding ( fail )
import Data.Attoparsec.ByteString
import Data.ByteString ( ByteString )
import qualified Data.ByteString as B
import qualified Data.ByteString.UTF8 as UTF8
import qualified Data.ByteString.Lazy.UTF8 as LUTF8
import Data.Functor ( (<&>) )
import Data.List
import Data.Proxy
import qualified Data.Text as T
import qualified Data.Text.Encoding as E
import Data.Time.Clock
import Data.Word8
import GHC.Exts ( toList )
import GitHub.Auth
import GitHub.Data.Name
import GitHub.Data.URL
import GitHub.Data.Request
import GitHub.Endpoints.Repos
import GitHub.Endpoints.Search
import GitHub.Endpoints.Users
import GitHub.Request
import HPath
import HPath.IO
import Prelude hiding ( readFile
, writeFile
, fail
)
import System.Console.Pretty
import System.IO ( hPutStrLn
, stderr
)
import System.Posix.ByteString ( getEnv
, RawFilePath
)
import System.Posix.Files.ByteString
import qualified System.Posix.Process.ByteString
as SPPB
import System.Posix.Process.ByteString
( ProcessStatus )
import qualified System.Posix.User as PU
import System.Exit
import Text.Read ( readEither )
------------------
--[ Data types ]--
------------------
data ForkResult = ForkResult {
upstream :: Repo
, downstream :: Repo
} deriving (Eq, Show)
data CloneMethod = CloneSSH
| CloneHTTP
deriving (Eq, Show)
data ProcessError = NoSuchPid
| ProcessFailed Int
| ProcessInterrupted
deriving (Eq, Show)
data UrlParseResult = UrlParseResult {
owner :: Name Owner
, repo :: Name Repo
} deriving (Eq, Show)
data Settings = Settings {
_auth :: Auth
, _basePath :: Maybe (Path Abs)
} deriving (Eq, Read, Show)
deriving instance Read Auth
instance Read (Path Abs) where
readsPrec p input =
let str = readsPrec p input :: [(String, String)]
in case str of
[(s, n)] -> case parseAbs (UTF8.fromString s) of
Just p' -> [(p', n)]
Nothing -> []
_ -> []
----------------
--[ Settings ]--
----------------
writeSettings :: (MonadThrow m, MonadIO m) => Settings -> m ()
writeSettings settings = do
sf <- getSettingsFile
let fileperms =
ownerWriteMode
`unionFileModes` ownerReadMode
`unionFileModes` groupWriteMode
`unionFileModes` groupReadMode
liftIO $ writeFile sf (Just fileperms) (u8 . show $ settings)
_info ("Written config to file " <> (UTF8.toString $ toFilePath sf))
getSettingsFile :: (MonadThrow m, MonadIO m) => m (Path Abs)
getSettingsFile = do
let app_dir = [rel|ghup|] :: Path Rel
(liftIO $ getEnv (u8 "XDG_CONFIG_HOME")) >>= \case
Just config -> do
pc <- parseAbs config
pure $ pc </> app_dir
Nothing -> do
let config_dir = [rel|.config|] :: Path Rel
home <- liftIO (getHomeDirectory >>= parseAbs)
pure $ home </> config_dir </> app_dir
getSettings :: (MonadThrow m, MonadIO m) => ExceptT String m Settings
getSettings = (fromEnv <|> fromFile)
where
fromEnv :: MonadIO m => ExceptT String m Settings
fromEnv = do
(liftIO $ getEnv (u8 "GITHUB_TOKEN")) >>= \case
Just t -> pure $ Settings (OAuth t) Nothing
Nothing -> throwError "Not found"
fromFile :: (MonadThrow m, MonadIO m) => ExceptT String m Settings
fromFile = do
sf <- getSettingsFile
out <-
ExceptT
$ liftIO
$ (flip catchIOError (\e -> pure $ Left $ show e) $ fmap Right $ readFile
sf
)
liftEither $ readEither (LUTF8.toString out)
-------------------------------------
--[ Combined Github / Git actions ]--
-------------------------------------
-- | Same as 'prepareRepoForPR', but gets the auth from the config file
-- and parses the owner/repo from the given repo url string.
prepareRepoForPR' :: ( MonadIO m
, MonadReader Settings m
, MonadFail m
, MonadThrow m
)
=> ByteString -- ^ string that contains repo url
-> Maybe (Path b) -- ^ base path where the repo should be cloned
-> Maybe ByteString -- ^ PR branch name to switch to
-> ExceptT String m ()
prepareRepoForPR' repoString mRepobase branch = do
UrlParseResult {..} <- liftEither $ parseURL repoString
repobase <- case mRepobase of
Just r -> fmap Just $ liftIO $ toAbs r
Nothing -> basePath
prepareRepoForPR owner repo repobase branch
-- | Fork the repository to my account, clone it, add original upstream
-- as remote, optionally switch to the given branch.
prepareRepoForPR :: ( MonadIO m
, MonadReader Settings m
, MonadFail m
, MonadThrow m
)
=> Name Owner
-> Name Repo
-> Maybe (Path b) -- ^ base path where the repo should be cloned
-> Maybe ByteString -- ^ PR branch name to switch to
-> ExceptT String m ()
prepareRepoForPR owner repo repobase branch = do
repodest <- case repobase of
Just rb ->
((rb </>) <$> (parseRel $ E.encodeUtf8 $ untagName repo))
>>= liftIO
. toAbs
Nothing -> (parseRel $ E.encodeUtf8 $ untagName repo) >>= liftIO . toAbs
ForkResult {..} <- withExceptT show $ forkRepository owner repo
withExceptT show $ ExceptT $ cloneRepository CloneSSH downstream repodest
withExceptT show $ ExceptT $ setUpstream upstream repodest
case branch of
Just b -> withExceptT show $ ExceptT $ createBranch b repodest
Nothing -> pure ()
lift $ _info
( "To change to the repo dir, run:\n\tcd "
<> (UTF8.toString $ toFilePath repodest)
)
-------------------
--[ Git actions ]--
-------------------
cloneRepository :: (MonadIO m, MonadFail m)
=> CloneMethod
-> Repo
-> Path b -- ^ full path where the repo should be cloned to
-> m (Either ProcessError ())
cloneRepository CloneSSH (Repo { repoSshUrl = (Just url) }) dest =
_clone (E.encodeUtf8 $ getUrl url) (toFilePath dest)
cloneRepository CloneHTTP (Repo { repoCloneUrl = (Just url) }) dest =
_clone (E.encodeUtf8 $ getUrl url) (toFilePath dest)
cloneRepository _ _ _ = fail "No clone url!"
setUpstream :: (MonadIO m, MonadFail m)
=> Repo -- ^ upstream
-> Path b -- ^ full path to repo
-> m (Either ProcessError ())
setUpstream (Repo { repoCloneUrl = (Just url) }) repodir = _runGit
[ u8 "-C"
, toFilePath repodir
, u8 "remote"
, u8 "add"
, u8 "upstream"
, (E.encodeUtf8 $ getUrl url)
]
setUpstream _ _ = fail "No clone url!"
createBranch :: MonadIO m
=> ByteString -- ^ branch name
-> Path b -- ^ full path to repo
-> m (Either ProcessError ())
createBranch branch repodir =
_runGit [u8 "-C", toFilePath repodir, u8 "checkout", u8 "-b", branch]
----------------------
--[ Github actions ]--
----------------------
forkRepository :: (MonadIO m, MonadReader Settings m)
=> Name Owner
-> Name Repo
-> ExceptT Error m ForkResult
forkRepository owner repo = do
upstream <- github_ (repositoryR owner repo)
downstream <- githubAuth (forkExistingRepoR owner repo Nothing)
pure $ ForkResult { .. }
-- | Same as deleteFork, but gets the auth from the config file
-- and parses the owner/repo from the given repo url string.
deleteFork' :: (MonadIO m, MonadReader Settings m)
=> ByteString
-> ExceptT String m ()
deleteFork' repoString = do
UrlParseResult {..} <- liftEither $ parseURL repoString
withExceptT show $ deleteFork owner repo
deleteFork :: (MonadIO m, MonadReader Settings m)
=> Name Owner
-> Name Repo
-> ExceptT Error m ()
deleteFork owner repo = do
github_ (repositoryR owner repo) >>= \case
(Repo { repoFork = Just True }) -> pure ()
_ -> throwError (UserError $ T.pack "Not a fork")
githubAuth (deleteRepoR owner repo)
getForks :: (MonadIO m, MonadReader Settings m)
=> Maybe UTCTime
-> ExceptT Error m [Repo]
getForks mtime = do
user <- githubAuth userInfoCurrentR
let userName = untagName $ userLogin user
repos <- github_
(searchReposR $ mconcat [T.pack "user:", userName, T.pack " fork:only"])
pure $ sortBy (\x y -> compare (repoUpdatedAt y) (repoUpdatedAt x)) $ filter
(\case
Repo { repoFork = Just True, repoUpdatedAt = Just t } ->
maybe True (t >=) mtime
_ -> False
)
(toList $ searchResultResults repos)
---------------
--[ Parsers ]--
---------------
parseURL :: ByteString -> Either String UrlParseResult
parseURL = parseOnly ghURLParser
ghURLParser :: Parser UrlParseResult
ghURLParser =
(\n r ->
let owner = mkName (Proxy :: Proxy Owner) (E.decodeUtf8 n)
repo = mkName (Proxy :: Proxy Repo) (E.decodeUtf8 r)
in UrlParseResult { .. }
)
<$> ( ( str "https://github.com/"
<|> str "http://github.com/"
<|> str "git@github.com:"
<|> empty'
)
*> takeWhile1 (/= _slash)
<* word8 _slash
)
<*> parseRepoName
where
str = string . u8
empty' = str ""
parseRepoName :: Parser ByteString
parseRepoName = do
c <- fmap B.singleton anyWord8
r <- many1' ((str ".git" <* endOfInput) <|> fmap B.singleton anyWord8)
if last r == u8 ".git"
then pure $ mconcat (c : (init r))
else pure (mconcat (c : r)) <* endOfInput
---------------
--[ Helpers ]--
---------------
u8 :: String -> ByteString
u8 = UTF8.fromString
_clone :: MonadIO m => ByteString -> ByteString -> m (Either ProcessError ())
_clone url dest = _runGit [u8 "clone", url, dest]
_toGitError :: Maybe ProcessStatus -> Either ProcessError ()
_toGitError ps = case ps of
Just (SPPB.Exited ExitSuccess ) -> Right ()
Just (SPPB.Exited (ExitFailure i)) -> Left $ ProcessFailed i
Just (SPPB.Terminated _ _ ) -> Left $ ProcessInterrupted
Just (SPPB.Stopped _ ) -> Left $ ProcessInterrupted
Nothing -> Left $ NoSuchPid
_runGit :: MonadIO m => [ByteString] -> m (Either ProcessError ())
_runGit args = liftIO $ do
pid <- executeFile ([rel|git|] :: Path Rel) args
SPPB.getProcessStatus True True pid <&> _toGitError
getHomeDirectory :: IO RawFilePath
getHomeDirectory = do
e <- getEnv (u8 "HOME")
case e of
Just fp -> pure fp
Nothing -> do
h <- PU.homeDirectory <$> (PU.getEffectiveUserID >>= PU.getUserEntryForID)
pure $ u8 h -- this is a guess
_info :: MonadIO m => String -> m ()
_info = liftIO . _stderr . color Green
_warn :: MonadIO m => String -> m ()
_warn = liftIO . _stderr . color Yellow
_err :: MonadIO m => String -> m ()
_err = liftIO . _stderr . color Red
_stderr :: MonadIO m => String -> m ()
_stderr = liftIO . hPutStrLn stderr
auth :: MonadReader Settings m => m Auth
auth = asks _auth
basePath :: MonadReader Settings m => m (Maybe (Path Abs))
basePath = asks _basePath
githubAuth :: ( MonadReader Settings m
, MonadIO m
, ParseResponse mt req
, res ~ Either Error req
)
=> (GenRequest mt rw req)
-> ExceptT Error m req
githubAuth req = do
a <- auth
ExceptT $ liftIO $ github a req
github_ :: (MonadIO m, ParseResponse mt req, res ~ Either Error req, ro ~ 'RO)
=> (GenRequest mt ro req)
-> ExceptT Error m req
github_ req = do
ExceptT $ liftIO $ github' req
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