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{-# LANGUAGE OverloadedRecordDot #-}
{-# LANGUAGE OverloadedStrings #-}
module History (getIssues, InvalidTreeGrepperResult (..), UnknownFileExtension (..), listIssues) where
import Control.Exception (Exception, catch, handle, throw)
import Data.Aeson (eitherDecode)
import Data.Binary (Binary, decodeFile, encodeFile)
import Data.ByteString.Lazy.Char8 qualified as L8
import Data.Function ((&))
import Data.List (intercalate)
import Data.Maybe (catMaybes, mapMaybe)
import Data.String (fromString)
import Data.Text (Text, lines, unpack)
import Data.Text.Encoding (decodeUtf8)
import Issue (Issue (..), fromMatch, id)
import Issue.Filter (Filter, applyFilter)
import Process (quote, sh, sh_)
import System.Directory (createDirectoryIfMissing, doesFileExist, getCurrentDirectory)
import System.Exit (ExitCode (ExitFailure), exitWith)
import System.FilePath (takeExtension, (</>))
import System.IO.Temp (withSystemTempDirectory)
import System.Process.Typed (setWorkingDir)
import Text.Printf (printf)
import TreeGrepper.Match qualified as G
import TreeGrepper.Result qualified as G
import Prelude hiding (id, lines)
import Prelude qualified as Prelude
data UnknownFileExtension = UnknownFileExtension
{ extension :: String
}
deriving (Show)
instance Exception UnknownFileExtension
data InvalidTreeGrepperResult = InvalidTreeGrepperResult
{ error :: String
}
deriving (Show)
instance Exception InvalidTreeGrepperResult
listIssues :: [Filter] -> [FilePath] -> IO [Issue]
listIssues filters files = do
commits <- fmap (lines . decodeUtf8 . L8.toStrict) $ sh ("git log --format=%H")
issueses <- mapM (\commit -> cached commit (\_ -> listIssuesOf commit filters files)) commits
(currentIssues, historicalIssues) <-
case issueses of
currentIssues : historicalIssueses ->
pure (currentIssues, concat historicalIssueses)
[] ->
die "no commits"
pure (map (merge . pick historicalIssues) currentIssues)
pick :: [Issue] -> Issue -> (Issue, [Issue])
pick issues issue =
(issue, filter (isSameIssue) issues)
where
isSameIssue otherIssue =
id otherIssue == id issue
merge :: (Issue, [Issue]) -> Issue
merge (issue, issues) =
case (mapMaybe provenance (reverse issues)) of
[] ->
issue
provenance : _ ->
issue {provenance = Just provenance}
cached :: Binary a => Text -> (Text -> IO a) -> IO a
cached commit func = do
cwd <- getCurrentDirectory
createDirectoryIfMissing True (cwd ++ "/.anissue")
let file = (cwd ++ "/.anissue/" ++ unpack commit)
fileExists <- doesFileExist file
if fileExists
then decodeFile file
else do
blob <- func commit
encodeFile file blob
pure blob
listIssuesOf :: Text -> [Filter] -> [FilePath] -> IO [Issue]
listIssuesOf commit filters files = do
issue <- withSystemTempDirectory "history" $ \tmp -> do
let worktree = tmp </> unpack commit
sh_ (fromString (printf "git worktree add --detach %s %s" (quote worktree) (quote (unpack commit))))
filter (applyFilter filters) . concat
<$> catch
( parMapM (handle forgetGetIssuesExceptions . getIssues worktree)
=<< getFiles worktree files
)
(\(InvalidTreeGrepperResult e) -> die e)
pure issue
where
forgetGetIssuesExceptions :: UnknownFileExtension -> IO [a]
forgetGetIssuesExceptions _ = pure []
getFiles :: FilePath -> [String] -> IO [FilePath]
getFiles cwd files =
Prelude.lines . L8.unpack
<$> sh
( fromString
( (printf "git ls-files --cached --exclude-standard --other%s")
( case files of
[] -> ""
_ -> " -- " ++ intercalate " " (map quote files)
)
)
& setWorkingDir cwd
)
getIssues :: FilePath -> FilePath -> IO [Issue]
getIssues cwd filename = do
let extension = takeExtension filename
treeGrepperLanguage =
-- TODO Add support for all tree-grepper supported files
--
-- tree-grepper supported files can be listed through `tree-grepper
-- --languages`.
case extension of
".elm" -> "elm"
".hs" -> "haskell"
".nix" -> "nix"
".sh" -> "sh"
_ -> throw (UnknownFileExtension extension)
treeGrepperQuery =
case extension of
".elm" -> "([(line_comment) (block_comment)])"
".hs" -> "(comment)"
".nix" -> "(comment)"
".sh" -> "(comment)"
_ -> throw (UnknownFileExtension extension)
decode raw =
case eitherDecode raw of
Left e -> throw (InvalidTreeGrepperResult e)
Right treeGrepperResult -> treeGrepperResult
matches <-
concatMap (\result -> map ((,) result) result.matches)
. map fixTreeGrepper
. decode
<$> sh
( fromString
( printf
"tree-grepper --query %s %s --format json %s"
(quote treeGrepperLanguage)
(quote treeGrepperQuery)
(quote filename)
)
& setWorkingDir cwd
)
catMaybes <$> mapM (uncurry (fromMatch cwd)) matches
fixTreeGrepper :: G.Result -> G.Result
fixTreeGrepper treeGrepperResult =
treeGrepperResult {G.matches = G.merge treeGrepperResult.matches}
die :: String -> IO a
die s = do
printf "error: %s\n" s
exitWith (ExitFailure 1)
|
