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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 Parallel (parMapM)
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 paths = do
commits <- getCommits
currentIssues <- listIssuesCurrent paths
historicalIssues <- fmap concat $ parMapM (\commit -> cached commit (\_ -> listIssuesOf commit)) commits
let currentIssuesFiltered = filter (applyFilter filters) currentIssues
pure $ map (fixProvenance historicalIssues) currentIssuesFiltered
getCommits :: IO [Text]
getCommits =
fmap (lines . decodeUtf8 . L8.toStrict) $ sh ("git log --format=%H")
fixProvenance :: [Issue] -> Issue -> Issue
fixProvenance historicalIssues =
merge . pick historicalIssues
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}
listIssuesCurrent :: [FilePath] -> IO [Issue]
listIssuesCurrent paths = do
worktree <- getCurrentDirectory
files <- getFiles worktree paths
concat <$> (catch (getIssuesPar worktree files) (\(InvalidTreeGrepperResult e) -> die e))
listIssuesOf :: Text -> IO [Issue]
listIssuesOf commit = do
withSystemTempDirectory "history" $ \tmp -> do
worktree <- do
let worktree = tmp </> unpack commit
sh_ (fromString (printf "git worktree add --detach %s %s" (quote worktree) (quote (unpack commit))))
pure worktree
files <- getFilesChanged worktree
concat <$> catch (getIssuesPar worktree files) (\(InvalidTreeGrepperResult e) -> die e)
forgetGetIssuesExceptions :: UnknownFileExtension -> IO [a]
forgetGetIssuesExceptions _ = pure []
getFiles :: FilePath -> [String] -> IO [FilePath]
getFiles cwd paths =
Prelude.lines . L8.unpack
<$> sh
( fromString
( (printf "git ls-files --cached --exclude-standard --other%s")
( case paths of
[] -> ""
_ -> " -- " ++ intercalate " " (map quote paths)
)
)
& setWorkingDir cwd
)
getFilesChanged :: FilePath -> IO [FilePath]
getFilesChanged cwd =
Prelude.lines . L8.unpack
<$> sh
( "git show -p --name-only --format=''"
& setWorkingDir cwd
)
getIssuesPar :: FilePath -> [FilePath] -> IO [[Issue]]
getIssuesPar worktree =
parMapM (handle forgetGetIssuesExceptions . getIssues worktree)
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}
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
die :: String -> IO a
die s = do
printf "error: %s\n" s
exitWith (ExitFailure 1)
|
