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|
module Review
( Plan (..),
Granularity (..),
PlanStep (..),
formulatePlan,
reviewPatch,
separateReview,
)
where
import Control.Exception (SomeException, catch)
import Control.Monad (ap, forM, forM_)
import Data.Binary qualified as B
import Data.ByteString.Lazy qualified as LB
import Data.Function (on, (&))
import Data.List (groupBy, sortOn)
import Data.List.NonEmpty qualified as NE
import Data.List.NonEmpty.Zipper qualified as Z
import Data.List.NonEmpty.Zipper.Extra ()
import Data.Maybe (fromMaybe)
import Data.Text qualified as T
import Data.Text.Encoding qualified as T
import Data.Text.IO qualified as T
import GHC.Generics (Generic)
import Git qualified
import Patch qualified as A
import Process (proc, sh, sh_)
import Render (renderAsText)
import System.Directory (createDirectoryIfMissing)
import System.FilePath (takeDirectory, (</>))
import System.IO.Temp (withSystemTempDirectory)
import System.Process.Typed qualified as P
import Text.Diff.Extra ()
import Text.Diff.Parse.Types qualified as D
import Text.Read (Lexeme (Ident, Symbol), choice, lexP, readPrec)
data Plan = Plan
{ baseBranch :: BranchName,
granularity :: Granularity,
steps :: Z.Zipper PlanStep
}
deriving (Show, Generic, B.Binary)
type BranchName = T.Text
data Granularity
= AsOne
| PerCommit
| PerFile
| PerHunk
deriving (Eq, Ord, Generic, B.Binary)
instance Show Granularity where
show AsOne = "as-one"
show PerCommit = "per-commit"
show PerFile = "per-file"
show PerHunk = "per-hunk"
instance Read Granularity where
readPrec =
choice
[ do
Ident "as" <- lexP
Symbol "-" <- lexP
Ident "one" <- lexP
pure AsOne,
do
Ident "per" <- lexP
Symbol "-" <- lexP
choice
[ do
Ident "commit" <- lexP
pure PerCommit,
do
Ident "file" <- lexP
pure PerFile,
do
Ident "hunk" <- lexP
pure PerHunk
]
]
data PlanStep = PlanStep
{ id :: [Int],
commit :: Git.CommitHash,
changes :: D.FileDeltas
}
deriving (Show, Generic, B.Binary)
formulatePlan :: Granularity -> T.Text -> T.Text -> IO Plan
formulatePlan granularity baseBranch featureBranch = do
baseCommit <- Git.resolveRef baseBranch
featureCommit <- Git.resolveRef featureBranch
commits <-
if granularity >= PerCommit
then do
commits <-
reverse <$> Git.getCommitsBetween baseCommit featureCommit
pure $ zipWith (,) commits (baseCommit : commits)
else pure [(featureCommit, baseCommit)]
fileDeltas <-
fmap concat . forM commits $
\(commit, earlierCommit) ->
map (earlierCommit,)
. if
| granularity >= PerHunk -> splitPerHunk
| granularity >= PerFile -> splitPerFile
| otherwise -> (: [])
. (.fileDeltas)
<$> Git.diffOf earlierCommit commit
pure
Plan
{ steps =
Z.fromNonEmpty . fromMaybe (error "TODO") . NE.nonEmpty $
map (uncurry (PlanStep {- TODO -} [])) fileDeltas,
..
}
splitPerFile :: D.FileDeltas -> [D.FileDeltas]
splitPerFile =
groupBy
((==) `on` (.fileDeltaSourceFile))
. sortOn (.fileDeltaSourceFile)
splitPerHunk :: D.FileDeltas -> [D.FileDeltas]
splitPerHunk =
concatMap
( \fileDeltas ->
[ hunkToFileDeltas fileDelta hunk
| fileDelta <- fileDeltas,
let D.Hunks hunks = fileDelta.fileDeltaContent,
hunk <- hunks
]
)
. splitPerFile
hunkToFileDeltas :: D.FileDelta -> D.Hunk -> D.FileDeltas
hunkToFileDeltas fileDelta hunk =
[ fileDelta
{ D.fileDeltaContent = D.Hunks [hunk]
}
]
reviewPatch :: D.FileDeltas -> IO D.FileDeltas
reviewPatch fileDeltas =
withSystemTempDirectory "anissue" $ \tmp -> do
let patchFile = tmp </> "a.patch"
loop =
( do
sh_ (proc "${EDITOR-vi} %" patchFile)
T.writeFile patchFile
. (renderAsText . A.Patch)
. addComments
. ((.fileDeltas) . A.parse)
=<< T.readFile patchFile
((.fileDeltas) . A.parse . T.decodeUtf8 . LB.toStrict)
<$> sh (proc "recountdiff %" patchFile)
)
`catch` (\(_ :: SomeException) -> loop)
T.writeFile patchFile (renderAsText (A.Patch fileDeltas))
loop
addComments :: D.FileDeltas -> D.FileDeltas
addComments =
map . mapContent . mapHunks . mapLines $ \line@(D.Line {..}) ->
if lineAnnotation == D.Comment
then -- TODO Haskell comment
D.Line D.Added ("--" <> lineContent)
else line
where
mapContent f x = x {D.fileDeltaContent = f x.fileDeltaContent}
mapHunks _ D.Binary = D.Binary
mapHunks f (D.Hunks hs) = D.Hunks (map f hs)
mapLines f x = x {D.hunkLines = map f x.hunkLines}
separateReview ::
Git.CommitHash ->
D.FileDeltas ->
D.FileDeltas ->
IO D.FileDeltas
separateReview commit fileDeltas fileDeltas' =
withTempSourceFiles commit fileDeltas $ \tmp -> do
T.writeFile (tmp </> patchFile) (renderAsText (A.Patch fileDeltas))
T.writeFile (tmp </> patchFile') (renderAsText (A.Patch fileDeltas'))
sh_
( proc "patch --quiet -p0 <../%" patchFile
& P.setWorkingDir (tmp </> "a")
)
sh_
( proc "patch --quiet -p0 <../%" patchFile'
& P.setWorkingDir (tmp </> "b")
)
( ap (flip if' [] . LB.null) $
(.fileDeltas) . A.parse . T.decodeUtf8 . LB.toStrict
)
<$> sh
( proc "git diff --no-index -- a b || :"
& P.setWorkingDir tmp
)
where
patchFile = "a.patch"
patchFile' = "b.patch"
withTempSourceFiles ::
Git.CommitHash ->
D.FileDeltas ->
(FilePath -> IO a) ->
IO a
withTempSourceFiles (Git.Commit hash) fileDeltas action = do
withSystemTempDirectory "anissue" $ \tmp -> do
createDirectoryIfMissing False (tmp </> "a")
createDirectoryIfMissing False (tmp </> "b")
forM_ sourceFiles $ \sourceFile -> do
let sourceDir = takeDirectory sourceFile
fileContents <-
if sourceFile /= "/dev/null"
then sh (proc "git show %:%" hash sourceFile)
else pure ""
createDirectoryIfMissing True (tmp </> "a" </> sourceDir)
LB.writeFile (tmp </> "a" </> sourceFile) fileContents
createDirectoryIfMissing True (tmp </> "b" </> sourceDir)
LB.writeFile (tmp </> "b" </> sourceFile) fileContents
action tmp
where
sourceFiles = map (T.unpack . (.fileDeltaSourceFile)) fileDeltas
if' :: Bool -> a -> a -> a
if' True a _ = a
if' False _ b = b
|
