@@ -5,84 +5,70 @@
5{-# LANGUAGE MultiWayIf #-}
5{-# LANGUAGE MultiWayIf #-}
6{-# LANGUAGE OverloadedStrings #-}
6{-# LANGUAGE OverloadedStrings #-}
7{-# LANGUAGE PatternGuards #-}
7{-# LANGUAGE PatternGuards #-}
8+{-# LANGUAGE QuasiQuotes #-}
8{-# LANGUAGE ScopedTypeVariables #-}
9{-# LANGUAGE ScopedTypeVariables #-}
9{-# LANGUAGE TypeApplications #-}
10{-# LANGUAGE TypeApplications #-}
10−
11+module Obelisk.Command.Thunk where
11−module Obelisk.Command.Thunk
16− , ReadThunkError (..)
19− , updateThunkToLatest
21− , createThunkWithLatest
22− , nixBuildAttrWithCache
23− , nixBuildThunkAttrWithCache
31import Control.Applicative
13import Control.Applicative
32−import Control.Exception (displayException, throwIO, try)
14+import Control.Exception (displayException, try)
15+import Control.Lens (ifor, ifor_, (.~))
33import Control.Monad
16import Control.Monad
34−import Control.Monad.Catch (handle)
17+import Control.Monad.Extra (findM)
18+import Control.Monad.Catch (MonadCatch, handle)
35import Control.Monad.Except
19import Control.Monad.Except
36import Data.Aeson ((.=))
20import Data.Aeson ((.=))
37import qualified Data.Aeson as Aeson
21import qualified Data.Aeson as Aeson
38import Data.Aeson.Encode.Pretty
22import Data.Aeson.Encode.Pretty
39import qualified Data.Aeson.Types as Aeson
23import qualified Data.Aeson.Types as Aeson
24+import Data.Bifunctor (first)
40import qualified Data.ByteString.Lazy as LBS
25import qualified Data.ByteString.Lazy as LBS
41−import qualified Data.ByteString.Lazy.Char8 as LBSC
26+import Data.Containers.ListUtils (nubOrd)
42import Data.Default
27import Data.Default
43−import Data.Either.Combinators (rightToMaybe)
28+import Data.Either.Combinators (fromRight', rightToMaybe)
44−import Data.Foldable
29+import Data.Foldable (toList)
30+import Data.Function ((&))
31+import Data.Functor ((<&>))
45import Data.Git.Ref (Ref)
32import Data.Git.Ref (Ref)
46import qualified Data.Git.Ref as Ref
33import qualified Data.Git.Ref as Ref
47import qualified Data.List as L
34import qualified Data.List as L
48−import Data.List.NonEmpty (NonEmpty (..))
35+import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
49import qualified Data.List.NonEmpty as NonEmpty
36import qualified Data.List.NonEmpty as NonEmpty
50import qualified Data.Map as Map
38import qualified Data.Map as Map
51import Data.Maybe
39import Data.Maybe
53import Data.Set (Set)
40import Data.Set (Set)
54import qualified Data.Set as Set
41import qualified Data.Set as Set
42+import Data.String.Here.Interpolated (i)
43+import Data.String.Here.Uninterpolated (here)
55import Data.Text (Text)
44import Data.Text (Text)
56import qualified Data.Text as T
45import qualified Data.Text as T
57import Data.Text.Encoding
46import Data.Text.Encoding
58import qualified Data.Text.IO as T
47import qualified Data.Text.IO as T
59import Data.Time.Clock.POSIX (posixSecondsToUTCTime)
48import Data.Time.Clock.POSIX (posixSecondsToUTCTime)
60−import Data.Yaml (parseMaybe, (.:))
49+import Data.Traversable (for)
61−import qualified Data.Yaml as Yaml
50+import Data.Yaml (parseMaybe)
62import GitHub
51import GitHub
63import GitHub.Data.Name
52import GitHub.Data.Name
64−import GitHub.Endpoints.Repos.Contents (archiveForR)
66import Obelisk.Command.Nix
53import Obelisk.Command.Nix
67import System.Directory
54import System.Directory
68import System.FilePath
56import System.FilePath
69import System.IO.Error
57import System.IO.Error
70import System.IO.Temp
58import System.IO.Temp
71−import System.Posix (getSymbolicLinkStatus, modificationTime)
59+import System.PosixCompat.Files (getSymbolicLinkStatus, modificationTime)
72−import System.Process (proc)
60+import qualified Text.URI as URI
74import Obelisk.App (MonadObelisk)
62import Obelisk.App (MonadObelisk)
75−import Obelisk.CliApp (Severity (..), callProcessAndLogOutput, failWith, putLog, readProcessAndLogStderr,
63+import Obelisk.CliApp
76− withExitFailMessage, withSpinner)
64+import Obelisk.Command.Utils
77−import Obelisk.Command.Utils (checkGitCleanStatus, cp, git, procWithPackages)
79--TODO: Support symlinked thunk data
66--TODO: Support symlinked thunk data
80data ThunkData
67data ThunkData
81− = ThunkData_Packed ThunkPtr
68+ = ThunkData_Packed ThunkSpec ThunkPtr
82 -- ^ Packed thunk
69 -- ^ Packed thunk
83− | ThunkData_Checkout (Maybe ThunkPtr)
70+ | ThunkData_Checkout
84 -- ^ Checked out thunk that was unpacked from this pointer
71 -- ^ Checked out thunk that was unpacked from this pointer
85− deriving (Show, Eq, Ord)
87-- | A reference to the exact data that a thunk should translate into
73-- | A reference to the exact data that a thunk should translate into
88data ThunkPtr = ThunkPtr
74data ThunkPtr = ThunkPtr
@@ -95,7 +81,7 @@ type NixSha256 = Text --TODO: Use a smart constructor and make this actually ver
96-- | A specific revision of data; it may be available from multiple sources
82-- | A specific revision of data; it may be available from multiple sources
97data ThunkRev = ThunkRev
83data ThunkRev = ThunkRev
98− { _thunkRev_commit :: Ref
84+ { _thunkRev_commit :: Ref Ref.SHA1
99 , _thunkRev_nixSha256 :: NixSha256
85 , _thunkRev_nixSha256 :: NixSha256
101 deriving (Show, Eq, Ord)
87 deriving (Show, Eq, Ord)
@@ -108,6 +94,11 @@ data ThunkSource
108 | ThunkSource_Git GitSource
94 | ThunkSource_Git GitSource
109 deriving (Show, Eq, Ord)
95 deriving (Show, Eq, Ord)
97+thunkSourceToGitSource :: ThunkSource -> GitSource
98+thunkSourceToGitSource = \case
99+ ThunkSource_GitHub s -> forgetGithub False s
100+ ThunkSource_Git s -> s
111data GitHubSource = GitHubSource
102data GitHubSource = GitHubSource
112 { _gitHubSource_owner :: Name Owner
103 { _gitHubSource_owner :: Name Owner
113 , _gitHubSource_repo :: Name Repo
104 , _gitHubSource_repo :: Name Repo
@@ -116,177 +107,208 @@ data GitHubSource = GitHubSource
117 deriving (Show, Eq, Ord)
108 deriving (Show, Eq, Ord)
110+newtype GitUri = GitUri { unGitUri :: URI.URI } deriving (Eq, Ord, Show)
112+gitUriToText :: GitUri -> Text
113+gitUriToText (GitUri uri)
114+ | (T.toLower . URI.unRText <$> URI.uriScheme uri) == Just "file"
115+ , Just (_, path) <- URI.uriPath uri
116+ = "/" <> T.intercalate "/" (map URI.unRText $ NonEmpty.toList path)
117+ | otherwise = URI.render uri
119data GitSource = GitSource
119data GitSource = GitSource
120− { _gitSource_url :: URI
120+ { _gitSource_url :: GitUri
121− , _gitSource_branch :: Name Branch
121+ , _gitSource_branch :: Maybe (Name Branch)
122 , _gitSource_fetchSubmodules :: Bool
122 , _gitSource_fetchSubmodules :: Bool
123+ , _gitSource_private :: Bool
124 deriving (Show, Eq, Ord)
125 deriving (Show, Eq, Ord)
126−commitNameToRef :: Name Commit -> Ref
127+newtype ThunkConfig = ThunkConfig
128+ { _thunkConfig_private :: Maybe Bool
131+data ThunkUpdateConfig = ThunkUpdateConfig
132+ { _thunkUpdateConfig_branch :: Maybe String
133+ , _thunkUpdateConfig_config :: ThunkConfig
136+data ThunkPackConfig = ThunkPackConfig
137+ { _thunkPackConfig_force :: Bool
138+ , _thunkPackConfig_config :: ThunkConfig
141+-- | Convert a GitHub source to a regular Git source. Assumes no submodules.
142+forgetGithub :: Bool -> GitHubSource -> GitSource
143+forgetGithub useSsh s = GitSource
144+ { _gitSource_url = GitUri $ URI.URI
145+ { URI.uriScheme = Just $ fromRight' $ URI.mkScheme $ if useSsh then "ssh" else "https"
146+ , URI.uriAuthority = Right $ URI.Authority
147+ { URI.authUserInfo = URI.UserInfo (fromRight' $ URI.mkUsername "git") Nothing
149+ , URI.authHost = fromRight' $ URI.mkHost "github.com"
150+ , URI.authPort = Nothing
152+ , URI.uriPath = Just ( False
153+ , fromRight' . URI.mkPathPiece <$>
154+ untagName (_gitHubSource_owner s)
155+ :| [ untagName (_gitHubSource_repo s) <> ".git" ]
158+ , URI.uriFragment = Nothing
160+ , _gitSource_branch = _gitHubSource_branch s
161+ , _gitSource_fetchSubmodules = False
162+ , _gitSource_private = _gitHubSource_private s
165+getThunkGitBranch :: ThunkPtr -> Maybe Text
166+getThunkGitBranch (ThunkPtr _ src) = fmap untagName $ case src of
167+ ThunkSource_GitHub s -> _gitHubSource_branch s
168+ ThunkSource_Git s -> _gitSource_branch s
170+commitNameToRef :: Name Commit -> Ref Ref.SHA1
127commitNameToRef (N c) = Ref.fromHex $ encodeUtf8 c
171commitNameToRef (N c) = Ref.fromHex $ encodeUtf8 c
129-- TODO: Use spinner here.
173-- TODO: Use spinner here.
130−getNixSha256ForUriUnpacked :: MonadObelisk m => URI -> m NixSha256
174+getNixSha256ForUriUnpacked
131getNixSha256ForUriUnpacked uri =
178getNixSha256ForUriUnpacked uri =
132− withExitFailMessage ("nix-prefetch-url: Failed to determine sha256 hash of URL " <> T.pack (show uri)) $ do
179+ withExitFailMessage ("nix-prefetch-url: Failed to determine sha256 hash of URL " <> gitUriToText uri) $ do
133− fmap T.pack $ readProcessAndLogStderr Debug $
180+ [hash] <- fmap T.lines $ readProcessAndLogOutput (Debug, Debug) $
134− procWithPackages ["nix-prefetch-scripts"] "nix-prefetch-url" ["--unpack" , "--type" , "sha256" , show uri]
181+ proc nixPrefetchUrlPath ["--unpack", "--type", "sha256", T.unpack $ gitUriToText uri]
136−nixPrefetchGit :: MonadObelisk m => URI -> Text -> Bool -> m NixSha256
184+nixPrefetchGit :: MonadObelisk m => GitUri -> Text -> Bool -> m NixSha256
137nixPrefetchGit uri rev fetchSubmodules =
185nixPrefetchGit uri rev fetchSubmodules =
138− withExitFailMessage ("nix-prefetch-git: Failed to determine sha256 hash of Git repo " <> T.pack (show uri) <> " at " <> rev) $ do
186+ withExitFailMessage ("nix-prefetch-git: Failed to determine sha256 hash of Git repo " <> gitUriToText uri <> " at " <> rev) $ do
139 out <- readProcessAndLogStderr Debug $
187 out <- readProcessAndLogStderr Debug $
140− proc "nix-prefetch-git" $ filter (/="")
188+ proc nixPrefetchGitPath $ filter (/="")
141− [ "--url", show uri
189+ [ "--url", T.unpack $ gitUriToText uri
142 , "--rev", T.unpack rev
190 , "--rev", T.unpack rev
143 , if fetchSubmodules then "--fetch-submodules" else ""
191 , if fetchSubmodules then "--fetch-submodules" else ""
144 , "--quiet"
192 , "--quiet"
147− case parseMaybe (Aeson..: "sha256") =<< Aeson.decode (LBSC.pack out) of
195+ case parseMaybe (Aeson..: "sha256") =<< Aeson.decodeStrict (encodeUtf8 out) of
148− Nothing -> failWith $ "nix-prefetch-git: unrecognized output " <> T.pack out
196+ Nothing -> failWith $ "nix-prefetch-git: unrecognized output " <> out
149 Just x -> pure x
197 Just x -> pure x
151−getLatestGitRev :: MonadObelisk m => GitSource -> m ThunkRev
152−getLatestGitRev s = withSystemTempDirectory "git-clone" $ \tmpDir -> do
153− withExitFailMessage ("Unable to determine latest git revision for branch " <> branch) $ do
154− out <- fmap T.pack $ readProcessAndLogStderr Debug $ git tmpDir
155− [ ["clone", "--no-checkout", show $ _gitSource_url s] -- Might be able to use --bare here instead to go faster.
156− , ["log", T.unpack branch, "--max-count=1", "--format=%H"]
159− case T.strip <$> safeLast (T.lines out) of
160− Nothing -> failWith $ "Unable to parse git log: " <> out
162− putLog Debug $ "Latest commit in " <> branch <> " is " <> rev
163− sha <- nixPrefetchGit (_gitSource_url s) rev (_gitSource_fetchSubmodules s)
164− putLog Debug $ "Nix sha256 is " <> sha
166− { _thunkRev_commit = Ref.fromHexString $ T.unpack rev
167− , _thunkRev_nixSha256 = sha
170− remote :: Text = "origin"
171− branch :: Text = remote <> "/" <> untagName (_gitSource_branch s)
173− safeLast [] = Nothing
174− safeLast xs = Just $ last xs
176−-- | Get the latest revision available from the given source
177−getLatestRev :: MonadObelisk m => ThunkSource -> m ThunkRev
179− ThunkSource_GitHub s -> do
180− auth <- liftIO $ getHubAuth "github.com"
181− commitsResult <- liftIO $ executeRequestMaybe auth $ commitsWithOptionsForR
182− (_gitHubSource_owner s)
183− (_gitHubSource_repo s)
185− $ case _gitHubSource_branch s of
187− Just b -> [CommitQuerySha $ untagName b]
188− commitInfos <- either (liftIO . throwIO) return commitsResult
189− commitInfo : _ <- return $ toList commitInfos
190− let commit = commitSha commitInfo
191− putLog Debug $ "Latest commit is " <> untagName commit
192− Right archiveUri <- liftIO $ executeRequestMaybe auth $ archiveForR (_gitHubSource_owner s) (_gitHubSource_repo s) ArchiveFormatTarball $ Just $ untagName commit
193− nixSha256 <- getNixSha256ForUriUnpacked archiveUri
194− putLog Debug $ "Nix sha256 is " <> nixSha256
196− { _thunkRev_commit = commitNameToRef commit
197− , _thunkRev_nixSha256 = nixSha256
199− ThunkSource_Git s -> getLatestGitRev s
201--TODO: Pretty print these
199--TODO: Pretty print these
202data ReadThunkError
200data ReadThunkError
203− = ReadThunkError_UnrecognizedFiles
201+ = ReadThunkError_UnrecognizedThunk
204− | ReadThunkError_AmbiguousFiles
202+ | ReadThunkError_UnrecognizedPaths (NonEmpty FilePath)
205− | ReadThunkError_UnrecognizedLoader Text
203+ | ReadThunkError_MissingPaths (NonEmpty FilePath)
206− | ReadThunkError_UnparseablePtr LBS.ByteString
204+ | ReadThunkError_UnparseablePtr FilePath String
207− deriving (Show)
205+ | ReadThunkError_FileError IOError
208−
206+ | ReadThunkError_FileDoesNotMatch FilePath Text
209−-- | Read a thunk and validate that it is only a thunk, either packed or unpacked.
207+ | ReadThunkError_UnrecognizedState String
210−-- If the thunk is packed and additional data is present, fail.
208+ | ReadThunkError_AmbiguousPackedState ThunkPtr ThunkPtr
211−readThunk :: MonadObelisk m => FilePath -> m (Either ReadThunkError ThunkData)
209+ deriving (Show)
212−readThunk thunkDir = do
210+
213− files <- liftIO $ listDirectory thunkDir
211+unpackedDirName :: FilePath
214− case ".git" `elem` files of
212+unpackedDirName = "."
215− True -> fmap ThunkData_Checkout <$> do
213+
216− let origThunkPath = thunkDir </> ".git" </> "obelisk" </> "orig-thunk"
214+attrCacheFileName :: FilePath
217− liftIO $ doesDirectoryExist origThunkPath >>= \case
215+attrCacheFileName = ".attr-cache"
218− True -> fmap Just <$> readPackedThunk origThunkPath
216+
219− False -> return $ return Nothing
217+-- | Specification for how a file in a thunk version works.
220− False -> liftIO $ fmap ThunkData_Packed <$> readPackedThunk thunkDir
218+data ThunkFileSpec
221−
219+ = ThunkFileSpec_Ptr (LBS.ByteString -> Either String ThunkPtr) -- ^ This file specifies 'ThunkPtr' data
222−data ThunkType = ThunkType
220+ | ThunkFileSpec_FileMatches Text -- ^ This file must match the given content exactly
223− { _thunkType_loader :: FilePath
221+ | ThunkFileSpec_CheckoutIndicator -- ^ Existence of this directory indicates that the thunk is unpacked
224− , _thunkType_json :: FilePath
222+ | ThunkFileSpec_AttrCache -- ^ This directory is an attribute cache
225− , _thunkType_optional :: Set FilePath
223+
226− , _thunkType_loaderVersions :: NonEmpty Text
224+-- | Specification for how a set of files in a thunk version work.
227− , _thunkType_parser :: Aeson.Object -> Aeson.Parser ThunkPtr
225+data ThunkSpec = ThunkSpec
228− }
226+ { _thunkSpec_name :: !Text
229−
227+ , _thunkSpec_files :: !(Map FilePath ThunkFileSpec)
230−gitHubThunkType :: ThunkType
231−gitHubThunkType = ThunkType
232− { _thunkType_loader = "default.nix"
233− , _thunkType_json = "github.json"
234− , _thunkType_optional = Set.fromList [".attr-cache"]
235− , _thunkType_loaderVersions = gitHubStandaloneLoaders
236− , _thunkType_parser = parseThunkPtr $ \v ->
237− ThunkSource_GitHub <$> parseGitHubSource v <|> ThunkSource_Git <$> parseGitSource v
240−gitThunkType :: ThunkType
230+thunkSpecTypes :: NonEmpty (NonEmpty ThunkSpec)
241−gitThunkType = ThunkType
231+thunkSpecTypes = gitThunkSpecs :| [gitHubThunkSpecs]
242− { _thunkType_loader = "default.nix"
232+
243− , _thunkType_json = "git.json"
233+-- | Attempts to match a 'ThunkSpec' to a given directory.
244− , _thunkType_optional = Set.fromList [".attr-cache"]
234+matchThunkSpecToDir
245− , _thunkType_loaderVersions = plainGitStandaloneLoaders
235+ :: (MonadError ReadThunkError m, MonadIO m, MonadCatch m)
246− , _thunkType_parser = parseThunkPtr $ fmap ThunkSource_Git . parseGitSource
236+ => ThunkSpec -- ^ 'ThunkSpec' to match against the given files/directory
247− }
237+ -> FilePath -- ^ Path to directory
248−
238+ -> Set FilePath -- ^ Set of file paths relative to the given directory
249−thunkTypes :: [ThunkType]
239+ -> m ThunkData
250−thunkTypes = [gitThunkType, gitHubThunkType]
240+matchThunkSpecToDir thunkSpec dir dirFiles = do
251−
241+ case nonEmpty (toList $ dirFiles `Set.difference` expectedPaths) of
252−findThunkType :: [ThunkType] -> FilePath -> IO (Either ReadThunkError ThunkType)
242+ Just fs -> throwError $ ReadThunkError_UnrecognizedPaths $ (dir </>) <$> fs
253−findThunkType types thunkDir = do
243+ Nothing -> pure ()
254− matches <- fmap catMaybes $ forM types $ \thunkType -> do
244+ case nonEmpty (toList $ requiredPaths `Set.difference` dirFiles) of
255− let
245+ Just fs -> throwError $ ReadThunkError_MissingPaths $ (dir </>) <$> fs
256− expectedContents = Set.fromList $ (thunkDir </>) <$>
246+ Nothing -> pure ()
257− [ _thunkType_loader thunkType
247+ datas <- fmap toList $ flip Map.traverseMaybeWithKey (_thunkSpec_files thunkSpec) $ \expectedPath -> \case
258− , _thunkType_json thunkType
248+ ThunkFileSpec_AttrCache -> Nothing <$ dirMayExist expectedPath
259− ]
249+ ThunkFileSpec_CheckoutIndicator -> liftIO (doesDirectoryExist (dir </> expectedPath)) <&> \case
260− optionalContents = Set.map (thunkDir </>) (_thunkType_optional thunkType)
250+ False -> Nothing
261−
251+ True -> Just ThunkData_Checkout
262− -- Ensure that there aren't any other files in the thunk
252+ ThunkFileSpec_FileMatches expectedContents -> handle (\(e :: IOError) -> throwError $ ReadThunkError_FileError e) $ do
263− -- NB: System.Directory.listDirectory returns the contents without the directory path
253+ actualContents <- liftIO (T.readFile $ dir </> expectedPath)
264− files <- liftIO $ Set.fromList . fmap (thunkDir </>) <$> listDirectory thunkDir
254+ case T.strip expectedContents == T.strip actualContents of
265− let unexpectedContents = files `Set.difference` (expectedContents `Set.union` optionalContents)
255+ True -> pure Nothing
266− missingContents = expectedContents `Set.difference` files
256+ False -> throwError $ ReadThunkError_FileDoesNotMatch (dir </> expectedPath) expectedContents
267− pure $ if Set.null unexpectedContents && Set.null missingContents
257+ ThunkFileSpec_Ptr parser -> handle (\(e :: IOError) -> throwError $ ReadThunkError_FileError e) $ do
268− then Just thunkType
258+ let path = dir </> expectedPath
269− else Nothing
259+ liftIO (doesFileExist path) >>= \case
270−
260+ False -> pure Nothing
271− pure $ case matches of
261+ True -> do
272− [singleMatch] -> Right singleMatch
262+ actualContents <- liftIO $ LBS.readFile path
273− [] -> Left ReadThunkError_UnrecognizedFiles
263+ case parser actualContents of
274− _ -> Left ReadThunkError_AmbiguousFiles
264+ Right v -> pure $ Just (ThunkData_Packed thunkSpec v)
265+ Left e -> throwError $ ReadThunkError_UnparseablePtr (dir </> expectedPath) e
267+ case nonEmpty datas of
268+ Nothing -> throwError ReadThunkError_UnrecognizedThunk
269+ Just xs -> fold1WithM xs $ \a b -> either throwError pure (mergeThunkData a b)
271+ rootPathsOnly = Set.fromList . mapMaybe takeRootDir . Map.keys
272+ takeRootDir = fmap NonEmpty.head . nonEmpty . splitPath
274+ expectedPaths = rootPathsOnly $ _thunkSpec_files thunkSpec
276+ requiredPaths = rootPathsOnly $ Map.filter isRequiredFileSpec $ _thunkSpec_files thunkSpec
277+ isRequiredFileSpec = \case
278+ ThunkFileSpec_FileMatches _ -> True
281+ dirMayExist expectedPath = liftIO (doesFileExist (dir </> expectedPath)) >>= \case
282+ True -> throwError $ ReadThunkError_UnrecognizedPaths $ expectedPath :| []
285+ -- Combine 'ThunkData' from different files, preferring "Checkout" over "Packed"
286+ mergeThunkData ThunkData_Checkout ThunkData_Checkout = Right ThunkData_Checkout
287+ mergeThunkData ThunkData_Checkout ThunkData_Packed{} = Left bothPackedAndUnpacked
288+ mergeThunkData ThunkData_Packed{} ThunkData_Checkout = Left bothPackedAndUnpacked
289+ mergeThunkData a@(ThunkData_Packed _ ptrA) (ThunkData_Packed _ ptrB) =
290+ if ptrA == ptrB then Right a else Left $ ReadThunkError_AmbiguousPackedState ptrA ptrB
292+ bothPackedAndUnpacked = ReadThunkError_UnrecognizedState "Both packed data and checkout present"
294+ fold1WithM (x :| xs) f = foldM f x xs
298+ => NonEmpty (NonEmpty ThunkSpec) -> FilePath -> m (Either ReadThunkError ThunkData)
299+readThunkWith specTypes dir = do
300+ dirFiles <- Set.fromList <$> liftIO (listDirectory dir)
301+ let specs = concatMap toList $ toList $ NonEmpty.transpose specTypes -- Interleave spec types so we try each one in a "fair" ordering
302+ flip fix specs $ \loop -> \case
303+ [] -> pure $ Left ReadThunkError_UnrecognizedThunk
304+ spec:rest -> runExceptT (matchThunkSpecToDir spec dir dirFiles) >>= \case
305+ Left e -> putLog Debug [i|Thunk specification ${_thunkSpec_name spec} did not match ${dir}: ${e}|] *> loop rest
306+ x@(Right _) -> x <$ putLog Debug [i|Thunk specification ${_thunkSpec_name spec} matched ${dir}|]
276-- | Read a thunk and validate that it is exactly a packed thunk.
308-- | Read a thunk and validate that it is exactly a packed thunk.
277-- If additional data is present, fail.
309-- If additional data is present, fail.
278−readPackedThunk :: FilePath -> IO (Either ReadThunkError ThunkPtr)
310+readThunk :: (MonadObelisk m) => FilePath -> m (Either ReadThunkError ThunkData)
279−readPackedThunk thunkDir = runExceptT $ do
311+readThunk = readThunkWith thunkSpecTypes
280− thunkType <- ExceptT $ findThunkType thunkTypes thunkDir
281− -- Ensure that we recognize the thunk loader
282− loader <- liftIO $ T.readFile $ thunkDir </> _thunkType_loader thunkType
283− unless (loader `elem` _thunkType_loaderVersions thunkType) $ do
284− throwError $ ReadThunkError_UnrecognizedLoader loader
286− txt <- liftIO $ LBS.readFile $ thunkDir </> _thunkType_json thunkType
287− case parseMaybe (_thunkType_parser thunkType) =<< Aeson.decode txt of
288− Nothing -> throwError $ ReadThunkError_UnparseablePtr txt
289− Just ptr -> return ptr
291parseThunkPtr :: (Aeson.Object -> Aeson.Parser ThunkSource) -> Aeson.Object -> Aeson.Parser ThunkPtr
313parseThunkPtr :: (Aeson.Object -> Aeson.Parser ThunkSource) -> Aeson.Object -> Aeson.Parser ThunkPtr
292parseThunkPtr parseSrc v = do
314parseThunkPtr parseSrc v = do
@@ -306,38 +328,42 @@ parseGitHubSource v = do
306 owner <- v Aeson..: "owner"
328 owner <- v Aeson..: "owner"
307 repo <- v Aeson..: "repo"
329 repo <- v Aeson..: "repo"
308 branch <- v Aeson..:! "branch"
330 branch <- v Aeson..:! "branch"
309− mPrivate <- v Aeson..:! "private"
331+ private <- v Aeson..:? "private"
310 pure $ GitHubSource
332 pure $ GitHubSource
311 { _gitHubSource_owner = owner
333 { _gitHubSource_owner = owner
312 , _gitHubSource_repo = repo
334 , _gitHubSource_repo = repo
313 , _gitHubSource_branch = branch
335 , _gitHubSource_branch = branch
314− , _gitHubSource_private = fromMaybe False mPrivate
336+ , _gitHubSource_private = fromMaybe False private
317parseGitSource :: Aeson.Object -> Aeson.Parser GitSource
339parseGitSource :: Aeson.Object -> Aeson.Parser GitSource
318parseGitSource v = do
340parseGitSource v = do
319 Just url <- parseGitUri <$> v Aeson..: "url"
341 Just url <- parseGitUri <$> v Aeson..: "url"
320− branch <- v Aeson..: "branch"
342+ branch <- v Aeson..:! "branch"
321 fetchSubmodules <- v Aeson..:! "fetchSubmodules"
343 fetchSubmodules <- v Aeson..:! "fetchSubmodules"
344+ private <- v Aeson..:? "private"
322 pure $ GitSource
345 pure $ GitSource
323 { _gitSource_url = url
346 { _gitSource_url = url
324 , _gitSource_branch = branch
347 , _gitSource_branch = branch
325 , _gitSource_fetchSubmodules = fromMaybe False fetchSubmodules
348 , _gitSource_fetchSubmodules = fromMaybe False fetchSubmodules
349+ , _gitSource_private = fromMaybe False private
328overwriteThunk :: MonadObelisk m => FilePath -> ThunkPtr -> m ()
352overwriteThunk :: MonadObelisk m => FilePath -> ThunkPtr -> m ()
329overwriteThunk target thunk = do
353overwriteThunk target thunk = do
330 -- Ensure that this directory is a valid thunk (i.e. so we aren't losing any data)
354 -- Ensure that this directory is a valid thunk (i.e. so we aren't losing any data)
331− Right _ <- readThunk target
355+ readThunk target >>= \case
356+ Left e -> failWith [i|Invalid thunk at ${target}: ${e}|]
333 --TODO: Is there a safer way to do this overwriting?
359 --TODO: Is there a safer way to do this overwriting?
334− liftIO $ removeDirectoryRecursive target
360+ liftIO $ removePathForcibly target
335− liftIO $ createThunk target thunk
361+ createThunk target $ Right thunk
337−thunkPtrLoader :: ThunkPtr -> Text
363+thunkPtrToSpec :: ThunkPtr -> ThunkSpec
338−thunkPtrLoader thunk = case _thunkPtr_source thunk of
364+thunkPtrToSpec thunk = case _thunkPtr_source thunk of
339− ThunkSource_GitHub _ -> NonEmpty.head gitHubStandaloneLoaders
365+ ThunkSource_GitHub _ -> NonEmpty.head gitHubThunkSpecs
340− ThunkSource_Git _ -> NonEmpty.head plainGitStandaloneLoaders
366+ ThunkSource_Git _ -> NonEmpty.head gitThunkSpecs
342-- It's important that formatting be very consistent here, because
368-- It's important that formatting be very consistent here, because
343-- otherwise when people update thunks, their patches will be messy
369-- otherwise when people update thunks, their patches will be messy
@@ -346,22 +372,18 @@ encodeThunkPtrData (ThunkPtr rev src) = case src of
346 ThunkSource_GitHub s -> encodePretty' githubCfg $ Aeson.object $ catMaybes
372 ThunkSource_GitHub s -> encodePretty' githubCfg $ Aeson.object $ catMaybes
347 [ Just $ "owner" .= _gitHubSource_owner s
373 [ Just $ "owner" .= _gitHubSource_owner s
348 , Just $ "repo" .= _gitHubSource_repo s
374 , Just $ "repo" .= _gitHubSource_repo s
349− , case _gitHubSource_branch s of
375+ , ("branch" .=) <$> _gitHubSource_branch s
350− Just b -> Just $ "branch" .= b
352− , if _gitHubSource_private s
353− then Just $ "private" .= True
355 , Just $ "rev" .= Ref.toHexString (_thunkRev_commit rev)
376 , Just $ "rev" .= Ref.toHexString (_thunkRev_commit rev)
356 , Just $ "sha256" .= _thunkRev_nixSha256 rev
377 , Just $ "sha256" .= _thunkRev_nixSha256 rev
378+ , Just $ "private" .= _gitHubSource_private s
358 ThunkSource_Git s -> encodePretty' plainGitCfg $ Aeson.object $ catMaybes
380 ThunkSource_Git s -> encodePretty' plainGitCfg $ Aeson.object $ catMaybes
359− --TODO: Is this safe? read/show is jank for `URI`
381+ [ Just $ "url" .= gitUriToText (_gitSource_url s)
360− [ Just $ "url" .= show (_gitSource_url s)
361 , Just $ "rev" .= Ref.toHexString (_thunkRev_commit rev)
382 , Just $ "rev" .= Ref.toHexString (_thunkRev_commit rev)
362− , Just $ "branch" .= _gitSource_branch s
383+ , ("branch" .=) <$> _gitSource_branch s
363 , Just $ "sha256" .= _thunkRev_nixSha256 rev
384 , Just $ "sha256" .= _thunkRev_nixSha256 rev
364 , Just $ "fetchSubmodules" .= _gitSource_fetchSubmodules s
385 , Just $ "fetchSubmodules" .= _gitSource_fetchSubmodules s
386+ , Just $ "private" .= _gitSource_private s
367 githubCfg = defConfig
389 githubCfg = defConfig
@@ -382,59 +404,84 @@ encodeThunkPtrData (ThunkPtr rev src) = case src of
384 , "sha256"
406 , "sha256"
385 , "fetchSubmodules"
408 , "fetchSubmodules"
386 ] <> compare
409 ] <> compare
387 , confTrailingNewline = True
410 , confTrailingNewline = True
390−createThunk :: MonadIO m => FilePath -> ThunkPtr -> m ()
413+createThunk :: MonadObelisk m => FilePath -> Either ThunkSpec ThunkPtr -> m ()
391−createThunk target thunk = liftIO $ do
414+createThunk target ptrInfo =
392− createDirectoryIfMissing True (target </> ".attr-cache")
415+ ifor_ (_thunkSpec_files spec) $ \path -> \case
393− T.writeFile (target </> "default.nix") (thunkPtrLoader thunk)
416+ ThunkFileSpec_FileMatches content -> withReadyPath path $ \p -> liftIO $ T.writeFile p content
394− let
417+ ThunkFileSpec_Ptr _ -> case ptrInfo of
395− jsonFileName = case _thunkPtr_source thunk of
418+ Left _ -> pure () -- We can't write the ptr without it
396− ThunkSource_GitHub _ -> "github"
419+ Right ptr -> withReadyPath path $ \p -> liftIO $ LBS.writeFile p (encodeThunkPtrData ptr)
397− ThunkSource_Git _ -> "git"
420+ _ -> pure ()
398− LBS.writeFile (target </> jsonFileName <.> "json") (encodeThunkPtrData thunk)
421+ where
422+ spec = either id thunkPtrToSpec ptrInfo
423+ withReadyPath path f = do
424+ let fullPath = target </> path
425+ putLog Debug $ "Writing thunk file " <> T.pack fullPath
426+ liftIO $ createDirectoryIfMissing True $ takeDirectory fullPath
400createThunkWithLatest :: MonadObelisk m => FilePath -> ThunkSource -> m ()
429createThunkWithLatest :: MonadObelisk m => FilePath -> ThunkSource -> m ()
401createThunkWithLatest target s = do
430createThunkWithLatest target s = do
402 rev <- getLatestRev s
431 rev <- getLatestRev s
403− createThunk target $ ThunkPtr
432+ createThunk target $ Right $ ThunkPtr
404 { _thunkPtr_source = s
433 { _thunkPtr_source = s
405 , _thunkPtr_rev = rev
434 , _thunkPtr_rev = rev
408−updateThunkToLatest :: MonadObelisk m => FilePath -> m ()
437+updateThunkToLatest :: MonadObelisk m => ThunkUpdateConfig -> FilePath -> m ()
409−updateThunkToLatest target = withSpinner ("Updating thunk " <> T.pack target <> " to latest") $ do
438+updateThunkToLatest (ThunkUpdateConfig mBranch thunkConfig) target = spinner $ do
410− (overwrite, ptr) <- readThunk target >>= \case
439+ checkThunkDirectory target
411− Left err -> failWith $ T.pack $ "thunk update: " <> show err
440+ -- check to see if thunk should be updated to a specific branch or just update it's current branch
412− Right c -> case c of
441+ case mBranch of
413− ThunkData_Packed t -> return (target, t)
442+ Nothing -> do
414− ThunkData_Checkout _ -> failWith "cannot update an unpacked thunk"
443+ (overwrite, ptr) <- readThunk target >>= \case
415− let src = _thunkPtr_source ptr
444+ Left err -> failWith [i|Thunk update: ${err}|]
416− rev <- getLatestRev src
445+ Right c -> case c of
417− overwriteThunk overwrite $ ThunkPtr
446+ ThunkData_Packed _ t -> return (target, t)
418− { _thunkPtr_source = src
447+ ThunkData_Checkout -> failWith "cannot update an unpacked thunk"
419− , _thunkPtr_rev = rev
448+ let src = _thunkPtr_source ptr
420− }
449+ rev <- getLatestRev src
450+ overwriteThunk overwrite $ modifyThunkPtrByConfig thunkConfig $ ThunkPtr
451+ { _thunkPtr_source = src
452+ , _thunkPtr_rev = rev
454+ Just branch -> readThunk target >>= \case
455+ Left err -> failWith [i|Thunk update: ${err}|]
456+ Right c -> case c of
457+ ThunkData_Packed _ t -> setThunk thunkConfig target (thunkSourceToGitSource $ _thunkPtr_source t) branch
458+ ThunkData_Checkout -> failWith [i|Thunk located at ${target} is unpacked. Use 'ob thunk pack' on the desired directory and then try 'ob thunk update' again.|]
460+ spinner = withSpinner' ("Updating thunk " <> T.pack target <> " to latest") (pure $ const $ "Thunk " <> T.pack target <> " updated to latest")
462+setThunk :: MonadObelisk m => ThunkConfig -> FilePath -> GitSource -> String -> m ()
463+setThunk thunkConfig target gs branch = do
464+ newThunkPtr <- uriThunkPtr (_gitSource_url gs) (_thunkConfig_private thunkConfig) (Just $ T.pack branch) Nothing
465+ overwriteThunk target newThunkPtr
466+ updateThunkToLatest (ThunkUpdateConfig Nothing thunkConfig) target
422-- | All recognized github standalone loaders, ordered from newest to oldest.
468-- | All recognized github standalone loaders, ordered from newest to oldest.
423-- This tool will only ever produce the newest one when it writes a thunk.
469-- This tool will only ever produce the newest one when it writes a thunk.
424−gitHubStandaloneLoaders :: NonEmpty Text
470+gitHubThunkSpecs :: NonEmpty ThunkSpec
425−gitHubStandaloneLoaders =
471+gitHubThunkSpecs =
426− gitHubStandaloneLoaderV2 :|
472+ gitHubThunkSpecV5 :|
427− [ gitHubStandaloneLoaderV3
473+ [ gitHubThunkSpecV4
428− , gitHubStandaloneLoaderV1
474+ , gitHubThunkSpecV3
431−gitHubStandaloneLoaderV1 :: Text
479+gitHubThunkSpecV1 :: ThunkSpec
432−gitHubStandaloneLoaderV1 = T.unlines
480+gitHubThunkSpecV1 = legacyGitHubThunkSpec "github-v1"
433− [ "import ((import <nixpkgs> {}).fetchFromGitHub (builtins.fromJSON (builtins.readFile ./github.json)))"
481+ "import ((import <nixpkgs> {}).fetchFromGitHub (builtins.fromJSON (builtins.readFile ./github.json)))"
436−gitHubStandaloneLoaderV2 :: Text
483+gitHubThunkSpecV2 :: ThunkSpec
437−gitHubStandaloneLoaderV2 = T.unlines
484+gitHubThunkSpecV2 = legacyGitHubThunkSpec "github-v2" $ T.unlines
438 [ "# DO NOT HAND-EDIT THIS FILE" --TODO: Add something about how to get more info on Obelisk, etc.
485 [ "# DO NOT HAND-EDIT THIS FILE" --TODO: Add something about how to get more info on Obelisk, etc.
439 , "import ((import <nixpkgs> {}).fetchFromGitHub ("
486 , "import ((import <nixpkgs> {}).fetchFromGitHub ("
440 , " let json = builtins.fromJSON (builtins.readFile ./github.json);"
487 , " let json = builtins.fromJSON (builtins.readFile ./github.json);"
@@ -444,8 +491,8 @@ gitHubStandaloneLoaderV2 = T.unlines
447−gitHubStandaloneLoaderV3 :: Text
494+gitHubThunkSpecV3 :: ThunkSpec
448−gitHubStandaloneLoaderV3 = T.unlines
495+gitHubThunkSpecV3 = legacyGitHubThunkSpec "github-v3" $ T.unlines
449 [ "# DO NOT HAND-EDIT THIS FILE"
496 [ "# DO NOT HAND-EDIT THIS FILE"
451 , " fetch = { private ? false, ... }@args: if private && builtins.hasAttr \"fetchGit\" builtins"
498 , " fetch = { private ? false, ... }@args: if private && builtins.hasAttr \"fetchGit\" builtins"
@@ -464,22 +511,62 @@ gitHubStandaloneLoaderV3 = T.unlines
464 , "in import (fetch (builtins.fromJSON (builtins.readFile ./github.json)))"
511 , "in import (fetch (builtins.fromJSON (builtins.readFile ./github.json)))"
467−plainGitStandaloneLoaders :: NonEmpty Text
514+gitHubThunkSpecV4 :: ThunkSpec
468−plainGitStandaloneLoaders =
515+gitHubThunkSpecV4 = legacyGitHubThunkSpec "github-v4" $ T.unlines
469− plainGitStandaloneLoaderV1 :|
516+ [ "# DO NOT HAND-EDIT THIS FILE"
470− [ plainGitStandaloneLoaderV2
517+ , "let fetch = { private ? false, fetchSubmodules ? false, owner, repo, rev, sha256, ... }:"
518+ , " if !fetchSubmodules && !private then builtins.fetchTarball {"
519+ , " url = \"https://github.com/${owner}/${repo}/archive/${rev}.tar.gz\"; inherit sha256;"
520+ , " } else (import <nixpkgs> {}).fetchFromGitHub {"
521+ , " inherit owner repo rev sha256 fetchSubmodules private;"
523+ , "in import (fetch (builtins.fromJSON (builtins.readFile ./github.json)))"
473−plainGitStandaloneLoaderV1 :: Text
526+legacyGitHubThunkSpec :: Text -> Text -> ThunkSpec
474−plainGitStandaloneLoaderV1 = T.unlines
527+legacyGitHubThunkSpec name loader = ThunkSpec name $ Map.fromList
528+ [ ("default.nix", ThunkFileSpec_FileMatches $ T.strip loader)
529+ , ("github.json" , ThunkFileSpec_Ptr parseGitHubJsonBytes)
530+ , (attrCacheFileName, ThunkFileSpec_AttrCache)
531+ , (".git", ThunkFileSpec_CheckoutIndicator)
534+gitHubThunkSpecV5 :: ThunkSpec
535+gitHubThunkSpecV5 = mkThunkSpec "github-v5" "github.json" parseGitHubJsonBytes [here|
536+# DO NOT HAND-EDIT THIS FILE
537+let fetch = { private ? false, fetchSubmodules ? false, owner, repo, rev, sha256, ... }:
538+ if !fetchSubmodules && !private then builtins.fetchTarball {
539+ url = "https://github.com/${owner}/${repo}/archive/${rev}.tar.gz"; inherit sha256;
540+ } else (import <nixpkgs> {}).fetchFromGitHub {
541+ inherit owner repo rev sha256 fetchSubmodules private;
543+ json = builtins.fromJSON (builtins.readFile ./github.json);
547+parseGitHubJsonBytes :: LBS.ByteString -> Either String ThunkPtr
548+parseGitHubJsonBytes = parseJsonObject $ parseThunkPtr $ \v ->
549+ ThunkSource_GitHub <$> parseGitHubSource v <|> ThunkSource_Git <$> parseGitSource v
551+gitThunkSpecs :: NonEmpty ThunkSpec
560+gitThunkSpecV1 :: ThunkSpec
561+gitThunkSpecV1 = legacyGitThunkSpec "git-v1" $ T.unlines
475 [ "# DO NOT HAND-EDIT THIS FILE"
562 [ "# DO NOT HAND-EDIT THIS FILE"
476 , "let fetchGit = {url, rev, ref ? null, branch ? null, sha256 ? null, fetchSubmodules ? null}:"
563 , "let fetchGit = {url, rev, ref ? null, branch ? null, sha256 ? null, fetchSubmodules ? null}:"
477 , " assert !fetchSubmodules; (import <nixpkgs> {}).fetchgit { inherit url rev sha256; };"
564 , " assert !fetchSubmodules; (import <nixpkgs> {}).fetchgit { inherit url rev sha256; };"
478 , "in import (fetchGit (builtins.fromJSON (builtins.readFile ./git.json)))"
565 , "in import (fetchGit (builtins.fromJSON (builtins.readFile ./git.json)))"
481−plainGitStandaloneLoaderV2 :: Text
568+gitThunkSpecV2 :: ThunkSpec
482−plainGitStandaloneLoaderV2 = T.unlines
569+gitThunkSpecV2 = legacyGitThunkSpec "git-v2" $ T.unlines
483 [ "# DO NOT HAND-EDIT THIS FILE"
570 [ "# DO NOT HAND-EDIT THIS FILE"
484 , "let fetchGit = {url, rev, ref ? null, branch ? null, sha256 ? null, fetchSubmodules ? null}:"
571 , "let fetchGit = {url, rev, ref ? null, branch ? null, sha256 ? null, fetchSubmodules ? null}:"
485 , " if builtins.hasAttr \"fetchGit\" builtins"
572 , " if builtins.hasAttr \"fetchGit\" builtins"
@@ -488,24 +575,87 @@ plainGitStandaloneLoaderV2 = T.unlines
488 , "in import (fetchGit (builtins.fromJSON (builtins.readFile ./git.json)))"
575 , "in import (fetchGit (builtins.fromJSON (builtins.readFile ./git.json)))"
491−thunkFileNames :: [FilePath]
578+-- This loader has a bug because @builtins.fetchGit@ is not given a @ref@
492−thunkFileNames = ["default.nix", "github.json", "git.json"]
579+-- and will fail to find commits without this because it does shallow clones.
493−
580+gitThunkSpecV3 :: ThunkSpec
494−-- | Look for authentication info from the 'hub' command
581+gitThunkSpecV3 = legacyGitThunkSpec "git-v3" $ T.unlines
495−getHubAuth
582+ [ "# DO NOT HAND-EDIT THIS FILE"
496− :: Text -- ^ Domain name
583+ , "let fetch = {url, rev, ref ? null, sha256 ? null, fetchSubmodules ? false, private ? false, ...}:"
497− -> IO (Maybe Auth)
584+ , " let realUrl = let firstChar = builtins.substring 0 1 url; in"
498−getHubAuth domain = do
585+ , " if firstChar == \"/\" then /. + url"
499− hubConfig <- getXdgDirectory XdgConfig "hub"
586+ , " else if firstChar == \".\" then ./. + url"
500− Yaml.decodeFileEither hubConfig >>= \case
587+ , " else url;"
501− Left _ -> return Nothing
588+ , " in if !fetchSubmodules && private then builtins.fetchGit {"
502− Right v -> return $ flip parseMaybe v $ \v' -> do
589+ , " url = realUrl; inherit rev;"
503− Yaml.Array domainConfigs <- v' .: domain --TODO: Determine what multiple domainConfigs means
590+ , " } else (import <nixpkgs> {}).fetchgit {"
504− [Yaml.Object domainConfig] <- return $ toList domainConfigs
591+ , " url = realUrl; inherit rev sha256;"
505− token <- domainConfig .: "oauth_token"
592+ , " };"
506− return $ OAuth $ encodeUtf8 token
593+ , "in import (fetch (builtins.fromJSON (builtins.readFile ./git.json)))"
508−--TODO: when checking something out, make a shallow clone
595+
596+gitThunkSpecV4 :: ThunkSpec
597+gitThunkSpecV4 = legacyGitThunkSpec "git-v4" $ T.unlines
598+ [ "# DO NOT HAND-EDIT THIS FILE"
599+ , "let fetch = {url, rev, branch ? null, sha256 ? null, fetchSubmodules ? false, private ? false, ...}:"
600+ , " let realUrl = let firstChar = builtins.substring 0 1 url; in"
601+ , " if firstChar == \"/\" then /. + url"
602+ , " else if firstChar == \".\" then ./. + url"
604+ , " in if !fetchSubmodules && private then builtins.fetchGit {"
605+ , " url = realUrl; inherit rev;"
606+ , " ${if branch == null then null else \"ref\"} = branch;"
607+ , " } else (import <nixpkgs> {}).fetchgit {"
608+ , " url = realUrl; inherit rev sha256;"
610+ , "in import (fetch (builtins.fromJSON (builtins.readFile ./git.json)))"
613+legacyGitThunkSpec :: Text -> Text -> ThunkSpec
614+legacyGitThunkSpec name loader = ThunkSpec name $ Map.fromList
615+ [ ("default.nix", ThunkFileSpec_FileMatches $ T.strip loader)
616+ , ("git.json" , ThunkFileSpec_Ptr parseGitJsonBytes)
617+ , (attrCacheFileName, ThunkFileSpec_AttrCache)
618+ , (".git", ThunkFileSpec_CheckoutIndicator)
621+gitThunkSpecV5 :: ThunkSpec
622+gitThunkSpecV5 = mkThunkSpec "git-v5" "git.json" parseGitJsonBytes [here|
623+# DO NOT HAND-EDIT THIS FILE
624+let fetch = {url, rev, branch ? null, sha256 ? null, fetchSubmodules ? false, private ? false, ...}:
625+ let realUrl = let firstChar = builtins.substring 0 1 url; in
626+ if firstChar == "/" then /. + url
627+ else if firstChar == "." then ./. + url
629+ in if !fetchSubmodules && private then builtins.fetchGit {
630+ url = realUrl; inherit rev;
631+ ${if branch == null then null else "ref"} = branch;
632+ } else (import <nixpkgs> {}).fetchgit {
633+ url = realUrl; inherit rev sha256;
635+ json = builtins.fromJSON (builtins.readFile ./git.json);
639+parseGitJsonBytes :: LBS.ByteString -> Either String ThunkPtr
640+parseGitJsonBytes = parseJsonObject $ parseThunkPtr $ fmap ThunkSource_Git . parseGitSource
642+mkThunkSpec :: Text -> FilePath -> (LBS.ByteString -> Either String ThunkPtr) -> Text -> ThunkSpec
643+mkThunkSpec name jsonFileName parser srcNix = ThunkSpec name $ Map.fromList
644+ [ ("default.nix", ThunkFileSpec_FileMatches defaultNixViaSrc)
645+ , ("thunk.nix", ThunkFileSpec_FileMatches srcNix)
646+ , (jsonFileName, ThunkFileSpec_Ptr parser)
647+ , (attrCacheFileName, ThunkFileSpec_AttrCache)
648+ , (normalise $ unpackedDirName </> ".git", ThunkFileSpec_CheckoutIndicator)
651+ defaultNixViaSrc = [here|
652+# DO NOT HAND-EDIT THIS FILE
653+import (import ./thunk.nix)
657+parseJsonObject :: (Aeson.Object -> Aeson.Parser a) -> LBS.ByteString -> Either String a
658+parseJsonObject p bytes = Aeson.parseEither p =<< Aeson.eitherDecode bytes
510-- | Checks a cache directory to see if there is a fresh symlink
660-- | Checks a cache directory to see if there is a fresh symlink
511-- to the result of building an attribute of a thunk.
661-- to the result of building an attribute of a thunk.
@@ -513,44 +663,49 @@ getHubAuth domain = do
513-- and the result is symlinked into the cache.
663-- and the result is symlinked into the cache.
514nixBuildThunkAttrWithCache
664nixBuildThunkAttrWithCache
515 :: MonadObelisk m
665 :: MonadObelisk m
516− => FilePath
666+ => ThunkSpec
517 -- ^ Path to directory containing Thunk
668 -- ^ Path to directory containing Thunk
518 -> String
669 -> String
519 -- ^ Attribute to build
670 -- ^ Attribute to build
520− -> m FilePath
671+ -> m (Maybe FilePath)
521 -- ^ Symlink to cached or built nix output
672 -- ^ Symlink to cached or built nix output
522-- WARNING: If the thunk uses an impure reference such as '<nixpkgs>'
673-- WARNING: If the thunk uses an impure reference such as '<nixpkgs>'
523-- the caching mechanism will fail as it merely measures the modification
674-- the caching mechanism will fail as it merely measures the modification
524-- time of the cache link and the expression to build.
675-- time of the cache link and the expression to build.
525−nixBuildThunkAttrWithCache thunkDir attr = do
676+nixBuildThunkAttrWithCache thunkSpec thunkDir attr = do
526− --NB: Expects thunkDir to be normalised with no trailing path separator.
527− --This should be guaranteed by the command argument parser.
528− let cacheErrHandler e
529− | isDoesNotExistError e = return Nothing -- expected from a cache miss
530− | otherwise = putLog Error (T.pack $ displayException e) >> return Nothing
531− cacheDir = thunkDir </> ".attr-cache"
532− cachePath = cacheDir </> attr <.> "out"
533 latestChange <- liftIO $ do
677 latestChange <- liftIO $ do
534− createDirectoryIfMissing False cacheDir
678+ let
535− let getModificationTimeMaybe = fmap rightToMaybe . try @IOError . getModificationTime
679+ getModificationTimeMaybe = fmap rightToMaybe . try @IOError . getModificationTime
536− maximum . catMaybes <$> mapM (getModificationTimeMaybe . (thunkDir </>)) thunkFileNames
680+ thunkFileNames = Map.keys $ _thunkSpec_files thunkSpec
537− cacheHit <- handle cacheErrHandler $ do
681+ maximum . catMaybes <$> traverse (getModificationTimeMaybe . (thunkDir </>)) thunkFileNames
538− cacheTime <- liftIO $ posixSecondsToUTCTime . realToFrac . modificationTime <$> getSymbolicLinkStatus cachePath
682+
539− return $ if latestChange <= cacheTime
683+ let cachePaths' = nonEmpty $ Map.keys $ Map.filter (\case ThunkFileSpec_AttrCache -> True; _ -> False) $
540− then Just cachePath
684+ _thunkSpec_files thunkSpec
541− else Nothing
685+ for cachePaths' $ \cachePaths ->
542− case cacheHit of
686+ fmap NonEmpty.head $ for cachePaths $ \cacheDir -> do
543− Just c -> return c
687+ let
544− Nothing -> do
688+ cachePath = thunkDir </> cacheDir </> attr <.> "out"
545− putLog Warning $ T.pack $ mconcat [thunkDir, ": ", attr, " not cached, building ..."]
689+ cacheErrHandler e
546− _ <- nixBuild $ def
690+ | isDoesNotExistError e = pure Nothing -- expected from a cache miss
547− { _nixBuildConfig_target = Target
691+ | otherwise = Nothing <$ putLog Error (T.pack $ displayException e)
548− { _target_path = thunkDir
692+ cacheHit <- handle cacheErrHandler $ do
549− , _target_attr = Just attr
693+ cacheTime <- liftIO $ posixSecondsToUTCTime . realToFrac . modificationTime <$> getSymbolicLinkStatus cachePath
550− }
694+ pure $ if latestChange <= cacheTime
551− , _nixBuildConfig_outLink = OutLink_IndirectRoot cachePath
695+ then Just cachePath
553− return cachePath
697+ case cacheHit of
700+ putLog Warning $ T.pack $ mconcat [thunkDir, ": ", attr, " not cached, building ..."]
701+ liftIO $ createDirectoryIfMissing True (takeDirectory cachePath)
702+ (cachePath <$) $ nixCmd $ NixCmd_Build $ def
703+ & nixBuildConfig_outLink .~ OutLink_IndirectRoot cachePath
704+ & nixCmdConfig_target .~ Target
705+ { _target_path = Just thunkDir
706+ , _target_attr = Just attr
707+ , _target_expr = Nothing
555-- | Build a nix attribute, and cache the result if possible
710-- | Build a nix attribute, and cache the result if possible
556nixBuildAttrWithCache
711nixBuildAttrWithCache
@@ -561,224 +716,466 @@ nixBuildAttrWithCache
561 -- ^ Attribute to build
716 -- ^ Attribute to build
562 -> m FilePath
717 -> m FilePath
563 -- ^ Symlink to cached or built nix output
718 -- ^ Symlink to cached or built nix output
564−nixBuildAttrWithCache exprPath attr = do
719+nixBuildAttrWithCache exprPath attr = readThunk exprPath >>= \case
565− readThunk exprPath >>= \case
720+ -- Only packed thunks are cached. In particular, checkouts are not.
566− -- Only packed thunks are cached. in particular, checkouts are not
721+ Right (ThunkData_Packed spec _) ->
567− Right (ThunkData_Packed _) -> nixBuildThunkAttrWithCache exprPath attr
722+ maybe build pure =<< nixBuildThunkAttrWithCache spec exprPath attr
568− _ -> nixBuild $ def
723+ _ -> build
569− { _nixBuildConfig_target = Target
724+ where
570− { _target_path = exprPath
725+ build = nixCmd $ NixCmd_Build $ def
726+ & nixBuildConfig_outLink .~ OutLink_None
727+ & nixCmdConfig_target .~ Target
728+ { _target_path = Just exprPath
571 , _target_attr = Just attr
729 , _target_attr = Just attr
730+ , _target_expr = Nothing
573− , _nixBuildConfig_outLink = OutLink_None
576−unpackThunk
733+-- | Safely update thunk using a custom action
577− :: MonadObelisk m
734+--
578− => FilePath
735+-- A temporary working space is used to do any update. When the custom
579− -> m ()
736+-- action successfully completes, the resulting (packed) thunk is copied
580−unpackThunk thunkDir = readThunk thunkDir >>= \case
737+-- back to the original location.
581− Left err -> failWith $ "thunk unpack: " <> T.pack (show err)
738+updateThunk :: MonadObelisk m => FilePath -> (FilePath -> m a) -> m a
739+updateThunk p f = withSystemTempDirectory "obelisk-thunkptr-" $ \tmpDir -> do
740+ p' <- copyThunkToTmp tmpDir p
741+ unpackThunk' True p'
743+ updateThunkFromTmp p'
746+ copyThunkToTmp tmpDir thunkDir = readThunk thunkDir >>= \case
747+ Left err -> failWith $ "withThunkUnpacked: " <> T.pack (show err)
748+ Right ThunkData_Packed{} -> do
749+ let tmpThunk = tmpDir </> "thunk"
750+ callProcessAndLogOutput (Notice, Error) $
751+ proc cp ["-r", "-T", thunkDir, tmpThunk]
753+ Right _ -> failWith "Thunk is not packed"
754+ updateThunkFromTmp p' = do
755+ _ <- packThunk' True (ThunkPackConfig False (ThunkConfig Nothing)) p'
756+ callProcessAndLogOutput (Notice, Error) $
757+ proc cp ["-r", "-T", p', p]
759+finalMsg :: Bool -> (a -> Text) -> Maybe (a -> Text)
760+finalMsg noTrail s = if noTrail then Nothing else Just s
762+-- | Check that we are not somewhere inside the thunk directory
763+checkThunkDirectory :: MonadObelisk m => FilePath -> m ()
764+checkThunkDirectory thunkDir = do
765+ currentDir <- liftIO getCurrentDirectory
766+ thunkDir' <- liftIO $ canonicalizePath thunkDir
767+ when (thunkDir' `L.isInfixOf` currentDir) $
768+ failWith [i|Can't perform thunk operations from within the thunk directory: ${thunkDir}|]
770+ -- Don't let thunk commands work when directly given an unpacked repo
771+ when (takeFileName thunkDir == unpackedDirName) $
772+ readThunk (takeDirectory thunkDir) >>= \case
773+ Right _ -> failWith [i|Refusing to perform thunk operation on ${thunkDir} because it is a thunk's unpacked source|]
776+unpackThunk :: MonadObelisk m => FilePath -> m ()
777+unpackThunk = unpackThunk' False
779+unpackThunk' :: MonadObelisk m => Bool -> FilePath -> m ()
780+unpackThunk' noTrail thunkDir = checkThunkDirectory thunkDir *> readThunk thunkDir >>= \case
781+ Left err -> failWith [i|Invalid thunk at ${thunkDir}: ${err}|]
582 --TODO: Overwrite option that rechecks out thunk; force option to do so even if working directory is dirty
782 --TODO: Overwrite option that rechecks out thunk; force option to do so even if working directory is dirty
583− Right (ThunkData_Checkout _) -> failWith "thunk unpack: thunk is already unpacked"
783+ Right ThunkData_Checkout -> failWith [i|Thunk at ${thunkDir} is already unpacked|]
584− Right (ThunkData_Packed tptr) -> do
784+ Right (ThunkData_Packed _ tptr) -> do
585 let (thunkParent, thunkName) = splitFileName thunkDir
785 let (thunkParent, thunkName) = splitFileName thunkDir
586− withTempDirectory thunkParent thunkName $ \tmpRepo -> do
786+ withTempDirectory thunkParent thunkName $ \tmpThunk -> do
587− let obGitDir = tmpRepo </> ".git" </> "obelisk"
787+ let
588− case _thunkPtr_source tptr of
788+ gitSrc = thunkSourceToGitSource $ _thunkPtr_source tptr
589− ThunkSource_GitHub s -> do
789+ newSpec = case _thunkPtr_source tptr of
590− mauth <- liftIO $ getHubAuth "github.com"
790+ ThunkSource_GitHub _ -> NonEmpty.head gitHubThunkSpecs
591− repoResult <- liftIO $ executeRequestMaybe mauth $ repositoryR (_gitHubSource_owner s) (_gitHubSource_repo s)
791+ ThunkSource_Git _ -> NonEmpty.head gitThunkSpecs
592− githubURI <- either (liftIO . throwIO) (return . repoSshUrl) repoResult >>= \case
792+ withSpinner' ("Fetching thunk " <> T.pack thunkName)
593− Nothing -> failWith "Cannot determine clone URI for thunk source"
793+ (finalMsg noTrail $ const $ "Fetched thunk " <> T.pack thunkName) $ do
594− Just c -> return $ T.unpack $ getUrl c
794+ let unpackedPath = tmpThunk </> unpackedDirName
595−
795+ gitCloneForThunkUnpack gitSrc (_thunkRev_commit $ _thunkPtr_rev tptr) unpackedPath
596− withSpinner ("Retrieving thunk " <> T.pack thunkName <> " from GitHub") $ do
796+
597− callProcessAndLogOutput (Notice, Notice) $
797+ let normalizeMore = dropTrailingPathSeparator . normalise
598− proc "hub" ["clone", "-n", githubURI, tmpRepo]
798+ when (normalizeMore unpackedPath /= normalizeMore tmpThunk) $ -- Only write meta data if the checkout is not inplace
599− --If this directory already exists then something is weird and we should fail
799+ createThunk tmpThunk $ Left newSpec
600− liftIO $ createDirectory obGitDir
800+
601− callProcessAndLogOutput (Notice, Error) $
801+ liftIO $ do
602− cp ["-r", "-T", thunkDir </> ".", obGitDir </> "orig-thunk"]
802+ removePathForcibly thunkDir
603−
803+ renameDirectory tmpThunk thunkDir
604− withSpinner ("Preparing thunk in " <> T.pack thunkDir) $ do
804+
605− -- Checkout
805+gitCloneForThunkUnpack
606− putLog Notice $ "Checking out " <> T.pack (show $ maybe "" untagName $ _gitHubSource_branch s)
607− callProcessAndLogOutput (Notice, Notice) $
611− , maybe [] (\n -> ["-B", T.unpack (untagName n)]) (_gitHubSource_branch s)
612− , pure $ Ref.toHexString $ _thunkRev_commit $ _thunkPtr_rev tptr
614− -- Set upstream branch
615− forM_ (_gitHubSource_branch s) $ \branch ->
616− callProcessAndLogOutput (Notice, Error) $
617− proc "hub" ["-C", tmpRepo, "branch", "-u", "origin/" <> T.unpack (untagName branch)]
618− callProcessAndLogOutput (Notice, Error) $
619− proc "rm" ["-r", thunkDir]
620− callProcessAndLogOutput (Notice, Error) $
621− procWithPackages ["coreutils"] "mv" ["-T", tmpRepo, thunkDir]
623− ThunkSource_Git s -> do
624− withSpinner ("Retreiving thunk " <> T.pack thunkName <> " from Git repo") $
625− callProcessAndLogOutput (Notice, Notice) $ git tmpRepo
626− [ ["clone", if _gitSource_fetchSubmodules s then "--recursive" else "", show (_gitSource_url s)]
627− , ["reset", "--hard", Ref.toHexString $ _thunkRev_commit $ _thunkPtr_rev tptr]
628− , if _gitSource_fetchSubmodules s then ["submodule", "update", "--recursive"] else []
629− , ["branch", "-u", "origin/" <> T.unpack (untagName $ _gitSource_branch s)]
632− withSpinner ("Preparing thunk in " <> T.pack thunkDir) $ do
633− liftIO $ createDirectory obGitDir
634− callProcessAndLogOutput (Notice, Error) $
635− cp ["-r", "-T", thunkDir </> ".", obGitDir </> "orig-thunk"]
636− callProcessAndLogOutput (Notice, Error) $
637− proc "rm" ["-r", thunkDir]
638− callProcessAndLogOutput (Notice, Error) $
639− procWithPackages ["coreutils"] "mv" ["-T", tmpRepo, thunkDir]
641−--TODO: add force mode to pack even if changes are present
642−--TODO: add a rollback mode to pack to the original thunk
644 :: MonadObelisk m
806 :: MonadObelisk m
645− => FilePath
807+ => GitSource -- ^ Git source to use
646− -> Text
808+ -> Ref hash -- ^ Commit hash to reset to
809+ -> FilePath -- ^ Directory to clone into
648−packThunk thunkDir upstream = readThunk thunkDir >>= \case
811+gitCloneForThunkUnpack gitSrc commit dir = do
649− Left err -> failWith $ T.pack $ "thunk pack: " <> show err
812+ let git = callProcessAndLogOutput (Notice, Notice) . gitProc dir
650− Right (ThunkData_Packed _) -> failWith "pack: thunk is already packed"
813+ git $ [ "clone" ]
651− Right (ThunkData_Checkout _) -> do
814+ ++ ["--recursive" | _gitSource_fetchSubmodules gitSrc]
652− withSpinner ("Packing thunk " <> T.pack thunkDir) $ do
815+ ++ [ T.unpack $ gitUriToText $ _gitSource_url gitSrc ]
653− thunkPtr <- getThunkPtr thunkDir upstream
816+ ++ do branch <- maybeToList $ _gitSource_branch gitSrc
654− callProcessAndLogOutput (Debug, Error) $ proc "rm" ["-rf", thunkDir]
817+ [ "--branch", T.unpack $ untagName branch ]
655− liftIO $ createThunk thunkDir thunkPtr
818+ git ["reset", "--hard", Ref.toHexString commit]
656−
819+ when (_gitSource_fetchSubmodules gitSrc) $
657−getThunkPtr :: MonadObelisk m => FilePath -> Text -> m ThunkPtr
820+ git ["submodule", "update", "--recursive", "--init"]
658−getThunkPtr = getThunkPtr' True
821+
659−
822+--TODO: add a rollback mode to pack to the original thunk
660−getThunkPtr' :: MonadObelisk m => Bool -> FilePath -> Text -> m ThunkPtr
823+packThunk :: MonadObelisk m => ThunkPackConfig -> FilePath -> m ThunkPtr
661−getThunkPtr' checkClean thunkDir upstream = do
824+packThunk = packThunk' False
662− when checkClean $ checkGitCleanStatus thunkDir >>= \case
825+
663− False -> do
826+packThunk' :: MonadObelisk m => Bool -> ThunkPackConfig -> FilePath -> m ThunkPtr
664− statusDebug <- fmap T.pack $ readProcessAndLogStderr Notice $
827+packThunk' noTrail (ThunkPackConfig force thunkConfig) thunkDir = checkThunkDirectory thunkDir *> readThunk thunkDir >>= \case
665− git thunkDir [["status", "--ignored"]]
828+ Right ThunkData_Packed{} -> failWith [i|Thunk at ${thunkDir} is is already packed|]
666− putLog Warning "cannot proceed with unsaved working copy (git status):"
829+ _ -> withSpinner'
667− putLog Notice statusDebug
830+ ("Packing thunk " <> T.pack thunkDir)
668− failWith "thunk pack: thunk checkout contains unsaved modifications"
831+ (finalMsg noTrail $ const $ "Packed thunk " <> T.pack thunkDir) $
669− True -> return ()
832+ do
670−
833+ let checkClean = if force then CheckClean_NoCheck else CheckClean_FullCheck
671− -- Check whether there are any stashes
834+ thunkPtr <- modifyThunkPtrByConfig thunkConfig <$> getThunkPtr checkClean thunkDir (_thunkConfig_private thunkConfig)
835+ liftIO $ removePathForcibly thunkDir
836+ createThunk thunkDir $ Right thunkPtr
839+modifyThunkPtrByConfig :: ThunkConfig -> ThunkPtr -> ThunkPtr
840+modifyThunkPtrByConfig (ThunkConfig markPrivate') ptr = case markPrivate' of
842+ Just markPrivate -> ptr { _thunkPtr_source = case _thunkPtr_source ptr of
843+ ThunkSource_Git s -> ThunkSource_Git $ s { _gitSource_private = markPrivate }
844+ ThunkSource_GitHub s -> ThunkSource_GitHub $ s { _gitHubSource_private = markPrivate }
848+ = CheckClean_FullCheck
849+ -- ^ Check that the repo is clean, including .gitignored files
850+ | CheckClean_NotIgnored
851+ -- ^ Check that the repo is clean, not including .gitignored files
852+ | CheckClean_NoCheck
853+ -- ^ Don't check that the repo is clean
855+getThunkPtr :: forall m. MonadObelisk m => CheckClean -> FilePath -> Maybe Bool -> m ThunkPtr
856+getThunkPtr gitCheckClean dir mPrivate = do
857+ let repoLocations = nubOrd $ map (first normalise)
858+ [(".git", "."), (unpackedDirName </> ".git", unpackedDirName)]
859+ repoLocation' <- liftIO $ flip findM repoLocations $ doesDirectoryExist . (dir </>) . fst
860+ thunkDir <- case repoLocation' of
861+ Nothing -> failWith [i|Can't find an unpacked thunk in ${dir}|]
862+ Just (_, path) -> pure $ normalise $ dir </> path
864+ let (checkClean, checkIgnored) = case gitCheckClean of
865+ CheckClean_FullCheck -> (True, True)
866+ CheckClean_NotIgnored -> (True, False)
867+ CheckClean_NoCheck -> (False, False)
868+ when checkClean $ ensureCleanGitRepo thunkDir checkIgnored
869+ "thunk pack: thunk checkout contains unsaved modifications"
871+ -- Check whether there are any stashes
872+ when checkClean $ do
672 stashOutput <- readGitProcess thunkDir ["stash", "list"]
873 stashOutput <- readGitProcess thunkDir ["stash", "list"]
673− when checkClean $ case T.null stashOutput of
874+ unless (T.null stashOutput) $
674− False -> do
875+ failWith $ T.unlines $
675− failWith $ T.unlines $
876+ [ "thunk pack: thunk checkout has stashes"
676− [ "thunk pack: thunk checkout has stashes"
877+ , "git stash list:"
677− , "git stash list:"
878+ ] ++ T.lines stashOutput
678− ] ++ T.lines stashOutput
879+
679− True -> return ()
880+ -- Get current branch
680−
881+ (mCurrentBranch, mCurrentCommit) <- do
681− --Check whether all local heads are pushed
882+ b <- listToMaybe . T.lines <$> readGitProcess thunkDir ["rev-parse", "--abbrev-ref", "HEAD"]
682− repoHeads <- T.lines <$> readGitProcess thunkDir ["for-each-ref", "--format=%(refname:short)", "refs/heads/"]
883+ c <- listToMaybe . T.lines <$> readGitProcess thunkDir ["rev-parse", "HEAD"]
683− remotes <- T.lines <$> readGitProcess thunkDir ["remote"]
884+ case b of
684− --Check that the upstream specified actually exists
885+ (Just "HEAD") -> failWith $ T.unlines
685− case L.find (== upstream) remotes of
886+ [ "thunk pack: You are in 'detached HEAD' state."
686− Nothing -> failWith $ "thunk pack: upstream " <> upstream <> " does not exist. Available upstreams are " <> T.intercalate ", " remotes
887+ , "If you want to pack at the current ref \
687− Just _ -> return ()
888+ \then please create a new branch with 'git checkout -b <new-branch-name>' and push this upstream."
688− -- iterate over cartesian product
889+ ]
689− when checkClean $ forM_ repoHeads $ \hd -> do
890+ _ -> return (b, c)
690− [localRev] <- T.lines <$> readGitProcess thunkDir ["rev-parse", T.unpack hd]
891+
691− forM_ remotes $ \rm -> do
892+ -- Get information on all branches and their (optional) designated upstream
692− --TODO: The error you get if a branch isn't pushed anywhere could be made more user friendly
893+ -- correspondents
693− [remoteMergeRev] <- fmap T.lines $ readGitProcess thunkDir
894+ headDump :: [Text] <- T.lines <$> readGitProcess thunkDir
694− ["merge-base", T.unpack localRev, "remotes/" <> T.unpack rm <> "/" <> T.unpack hd]
895+ [ "for-each-ref"
695− case remoteMergeRev == localRev of
896+ , "--format=%(refname:short) %(upstream:short) %(upstream:remotename)"
696− False -> failWith $ mconcat [ "thunk unpack: branch ", hd, " has not been pushed to ", rm ]
897+ , "refs/heads/"
697− True -> return ()
898+ ]
699− --We assume it's safe to pack the thunk at this point
900+ (headInfo :: Map Text (Maybe (Text, Text)))
700− [remoteUri'] <- fmap T.lines $ readGitProcess thunkDir ["config", "--get", "remote." <> T.unpack upstream <> ".url"]
901+ <- fmap Map.fromList $ forM headDump $ \line -> do
701−
902+ (branch : restOfLine) <- pure $ T.words line
702− let uriParseFailure = "Could not identify git remote: " <> remoteUri'
903+ mUpstream <- case restOfLine of
703− mRemoteUri = parseGitUri remoteUri'
904+ [] -> pure Nothing
704− case mRemoteUri of
905+ [u, r] -> pure $ Just (u, r)
705− Nothing -> failWith uriParseFailure
906+ (_:_) -> failWith "git for-each-ref invalid output"
706− Just remoteUri -> do
907+ pure (branch, mUpstream)
707− refs <- fmap (map (refsToTuples . T.words) . T.lines) $ readGitProcess thunkDir ["show-ref", "--head"]
908+
708− -- safe because exactly one hash is associated with HEAD
909+ putLog Debug $ "branches: " <> T.pack (show headInfo)
709− let Just currentHead = fst <$> L.find ((== "HEAD") . snd) refs
910+
710− remoteHeads = Map.fromList $ catMaybes $ fmap
911+ let errorMap :: Map Text ()
711− (\(x,y) -> (,) x <$> T.stripPrefix ("refs/remotes/" <> upstream <> "/") y)
912+ headUpstream :: Map Text (Text, Text)
712− refs
913+ (errorMap, headUpstream) = flip Map.mapEither headInfo $ \case
713− localHeads = Map.fromList $ catMaybes $ fmap
914+ Nothing -> Left ()
714− (\(x,y) -> (,) x <$> T.stripPrefix "refs/heads/" y)
915+ Just b -> Right b
716− currentUpstreamBranch = Map.lookup currentHead remoteHeads
917+ putLog Debug $ "branches with upstream branch set: " <> T.pack (show headUpstream)
717− <|> Map.lookup currentHead localHeads
918+
718− if isGithubThunk remoteUri
919+ -- Check that every branch has a remote equivalent
719− then githubThunkPtr remoteUri currentHead currentUpstreamBranch
920+ when checkClean $ do
720− else gitThunkPtr remoteUri currentHead currentUpstreamBranch
921+ let untrackedBranches = Map.keys errorMap
721− where
922+ when (not $ L.null untrackedBranches) $ failWith $ T.unlines $
722− refsToTuples [x, y] = (x, y)
923+ [ "thunk pack: Certain branches in the thunk have no upstream branch \
723− refsToTuples x = error $ "thunk pack: cannot parse ref " <> show x
924+ \set. This means we don't know to check whether all your work is \
724− isGithubThunk u
925+ \saved. The offending branches are:"
725− | Just uriAuth <- uriAuthority u
926+ , ""
726− = case uriScheme u of
927+ , T.unwords untrackedBranches
727− "ssh:" -> uriAuth == URIAuth "git@" "github.com" ""
928+ , ""
728− s -> s `L.elem` [ "git:", "https:", "http:" ] -- "http:" just redirects to "https:"
929+ , "To fix this, you probably want to do:"
729− && uriRegName uriAuth == "github.com"
930+ , ""
730− | otherwise = False
931+ ] ++
731− githubThunkPtr u commit' branch' = do
932+ ((\branch -> "git push -u origin " <> branch) <$> untrackedBranches) ++
732− ["/", owner', repo'] <- return $ splitDirectories (uriPath u)
933+ [ ""
733− let owner = N (T.pack owner')
934+ , "These will push the branches to the default remote under the same \
734− dropGitExtension r = fromMaybe r $ T.stripSuffix ".git" r
935+ \name, and (thanks to the `-u`) remember that choice so you don't \
735− repo = N $ dropGitExtension $ T.pack repo'
936+ \get this error again."
736− commit = N commit'
937+ ]
737− branch = N <$> branch'
938+
738− mauth <- liftIO $ getHubAuth "github.com"
939+ -- loosely by https://stackoverflow.com/questions/7773939/show-git-ahead-and-behind-info-for-all-branches-including-remotes
739− repoResult <- liftIO $ executeRequestMaybe mauth $ repositoryR owner repo
940+ stats <- ifor headUpstream $ \branch (upstream, _remote) -> do
740− repoIsPrivate <- either (liftIO . throwIO) (return . repoPrivate) repoResult
941+ (stat :: [Text]) <- T.lines <$> readGitProcess thunkDir
741− archiveResult <- liftIO $ executeRequestMaybe mauth $
942+ [ "rev-list", "--left-right"
742− archiveForR owner repo ArchiveFormatTarball (Just (untagName commit))
943+ , T.unpack branch <> "..." <> T.unpack upstream
743− archiveUri <- either (liftIO . throwIO) return archiveResult
944+ ]
744− hash <- getNixSha256ForUriUnpacked archiveUri
945+ let ahead = length $ [ () | Just ('<', _) <- T.uncons <$> stat ]
745− return $ ThunkPtr
946+ behind = length $ [ () | Just ('>', _) <- T.uncons <$> stat ]
746− { _thunkPtr_rev = ThunkRev
947+ pure (upstream, (ahead, behind))
747− { _thunkRev_commit = commitNameToRef commit
948+
748− , _thunkRev_nixSha256 = hash
949+ -- Those branches which have commits ahead of, i.e. not on, the upstream
749− }
950+ -- branch. Purely being behind is fine.
750− , _thunkPtr_source = ThunkSource_GitHub $ GitHubSource
951+ let nonGood = Map.filter ((/= 0) . fst . snd) stats
751− { _gitHubSource_owner = owner
952+
752− , _gitHubSource_repo = repo
953+ when (not $ Map.null nonGood) $ failWith $ T.unlines $
753− , _gitHubSource_branch = branch
954+ [ "thunk pack: Certain branches in the thunk have commits not yet pushed upstream:"
754− , _gitHubSource_private = repoIsPrivate
955+ , ""
957+ flip map (Map.toList nonGood) (\(branch, (upstream, (ahead, behind))) -> mconcat
958+ [" ", branch, " ahead: ", T.pack (show ahead), " behind: ", T.pack (show behind), " remote branch ", upstream]) ++
960+ , "Please push these upstream and try again. (Or just fetch, if they are somehow \
961+ \pushed but this repo's remote tracking branches don't know it.)"
964+ when checkClean $ do
965+ -- We assume it's safe to pack the thunk at this point
966+ putLog Informational "All changes safe in git remotes. OK to pack thunk."
968+ let remote = maybe "origin" snd $ flip Map.lookup headUpstream =<< mCurrentBranch
970+ [remoteUri'] <- fmap T.lines $ readGitProcess thunkDir
973+ , "remote." <> T.unpack remote <> ".url"
976+ remoteUri <- case parseGitUri remoteUri' of
977+ Nothing -> failWith $ "Could not identify git remote: " <> remoteUri'
978+ Just uri -> pure uri
979+ uriThunkPtr remoteUri mPrivate mCurrentBranch mCurrentCommit
981+-- | Get the latest revision available from the given source
982+getLatestRev :: MonadObelisk m => ThunkSource -> m ThunkRev
984+ let gitS = thunkSourceToGitSource os
985+ (_, commit) <- gitGetCommitBranch (_gitSource_url gitS) (untagName <$> _gitSource_branch gitS)
987+ ThunkSource_GitHub s -> githubThunkRev s commit
988+ ThunkSource_Git s -> gitThunkRev s commit
990+-- | Convert a URI to a thunk
992+-- If the URL is a github URL, we try to just download an archive for
993+-- performance. If that doesn't work (e.g. authentication issue), we fall back
994+-- on just doing things the normal way for git repos in general, and save it as
995+-- a regular git thunk.
996+uriThunkPtr :: MonadObelisk m => GitUri -> Maybe Bool -> Maybe Text -> Maybe Text -> m ThunkPtr
997+uriThunkPtr uri mPrivate mbranch mcommit = do
998+ commit <- case mcommit of
999+ Nothing -> gitGetCommitBranch uri mbranch >>= return . snd
1000+ (Just c) -> return c
1001+ (src, rev) <- uriToThunkSource uri mPrivate mbranch >>= \case
1002+ ThunkSource_GitHub s -> do
1003+ rev <- runExceptT $ githubThunkRev s commit
1005+ Right r -> pure (ThunkSource_GitHub s, r)
1008+\Failed to fetch archive from GitHub. This is probably a private repo. \
1009+\Falling back on normal fetchgit. Original failure:"
1011+ let s' = forgetGithub True s
1012+ (,) (ThunkSource_Git s') <$> gitThunkRev s' commit
1013+ ThunkSource_Git s -> (,) (ThunkSource_Git s) <$> gitThunkRev s commit
1015+ { _thunkPtr_rev = rev
1016+ , _thunkPtr_source = src
1019+-- | N.B. Cannot infer all fields.
1021+-- If the thunk is a GitHub thunk and fails, we do *not* fall back like with
1022+-- `uriThunkPtr`. Unlike a plain URL, a thunk src explicitly states which method
1023+-- should be employed, and so we respect that.
1024+uriToThunkSource :: MonadObelisk m => GitUri -> Maybe Bool -> Maybe Text -> m ThunkSource
1025+uriToThunkSource (GitUri u) mPrivate
1026+ | Right uriAuth <- URI.uriAuthority u
1027+ , Just scheme <- URI.unRText <$> URI.uriScheme u
1029+ "ssh" -> uriAuth == URI.Authority
1030+ { URI.authUserInfo = Just $ URI.UserInfo (fromRight' $ URI.mkUsername "git") Nothing
1031+ , URI.authHost = fromRight' $ URI.mkHost "github.com"
1032+ , URI.authPort = Nothing
756− }
1034+ s -> s `L.elem` [ "git", "https", "http" ] -- "http:" just redirects to "https:"
757− gitThunkPtr u commit branch' = do
1035+ && URI.unRText (URI.authHost uriAuth) == "github.com"
758− let protocols = ["https:", "ssh:", "git:"]
1036+ , Just (_, owner :| [repoish]) <- URI.uriPath u
759− unless (T.toLower (T.pack $ uriScheme u) `elem` protocols) $
1037+ = \mbranch -> do
760− failWith $ "thunk pack: obelisk currently only supports "
1038+ isPrivate <- getIsPrivate
761− <> T.intercalate ", " protocols <> " protocols for non-GitHub remotes"
1039+ pure $ ThunkSource_GitHub $ GitHubSource
762− hash <- nixPrefetchGit u commit False
1040+ { _gitHubSource_owner = N $ URI.unRText owner
763− branch <- case branch' of
1041+ , _gitHubSource_repo = N $ let
764− Nothing -> failWith "thunk pack: git thunks must track a branch"
1042+ repoish' = URI.unRText repoish
765− Just b -> pure $ N b
1043+ in fromMaybe repoish' $ T.stripSuffix ".git" repoish'
766− pure $ ThunkPtr
1044+ , _gitHubSource_branch = N <$> mbranch
767− { _thunkPtr_rev = ThunkRev
1045+ , _gitHubSource_private = isPrivate
768− { _thunkRev_commit = commitNameToRef (N commit)
769− , _thunkRev_nixSha256 = hash
771− , _thunkPtr_source = ThunkSource_Git $ GitSource
1047+
772− { _gitSource_url = u
1048+ | otherwise = \mbranch -> do
773− , _gitSource_branch = branch
1049+ isPrivate <- getIsPrivate
1050+ pure $ ThunkSource_Git $ GitSource
1051+ { _gitSource_url = GitUri u
1052+ , _gitSource_branch = N <$> mbranch
774 , _gitSource_fetchSubmodules = False -- TODO: How do we determine if this should be true?
1053 , _gitSource_fetchSubmodules = False -- TODO: How do we determine if this should be true?
1054+ , _gitSource_private = isPrivate
1057+ getIsPrivate = maybe (guessGitRepoIsPrivate $ GitUri u) pure mPrivate
1059+guessGitRepoIsPrivate :: MonadObelisk m => GitUri -> m Bool
1060+guessGitRepoIsPrivate uri = flip fix urisToTry $ \loop -> \case
1062+ uriAttempt:xs -> do
1063+ result <- readCreateProcessWithExitCode $
1070+ , T.unpack $ gitUriToText uriAttempt
1073+ (ExitSuccess, _, _) -> pure False -- Must be a public repo
1076+ urisToTry = nubOrd $
1077+ -- Include the original URI if it isn't using SSH because SSH will certainly fail.
1078+ [uri | fmap URI.unRText (URI.uriScheme (unGitUri uri)) /= Just "ssh"] <>
1079+ [changeScheme "https" uri, changeScheme "http" uri]
1080+ changeScheme scheme (GitUri u) = GitUri $ u
1081+ { URI.uriScheme = URI.mkScheme scheme
1082+ , URI.uriAuthority = (\x -> x { URI.authUserInfo = Nothing }) <$> URI.uriAuthority u
778−parseGitUri :: Text -> Maybe URI
1085+-- Funny signature indicates no effects depend on the optional branch name.
779−parseGitUri x = parseURIReference (T.unpack x) <|> parseSshShorthand x
1086+githubThunkRev
1092+githubThunkRev s commit = do
1093+ owner <- forcePP $ _gitHubSource_owner s
1094+ repo <- forcePP $ _gitHubSource_repo s
1095+ revTarball <- URI.mkPathPiece $ commit <> ".tar.gz"
1096+ let archiveUri = GitUri $ URI.URI
1097+ { URI.uriScheme = Just $ fromRight' $ URI.mkScheme "https"
1098+ , URI.uriAuthority = Right $ URI.Authority
1099+ { URI.authUserInfo = Nothing
1100+ , URI.authHost = fromRight' $ URI.mkHost "github.com"
1101+ , URI.authPort = Nothing
1103+ , URI.uriPath = Just ( False
1104+ , owner :| [ repo, fromRight' $ URI.mkPathPiece "archive", revTarball ]
1106+ , URI.uriQuery = []
1107+ , URI.uriFragment = Nothing
1109+ hash <- getNixSha256ForUriUnpacked archiveUri
1110+ putLog Debug $ "Nix sha256 is " <> hash
1112+ { _thunkRev_commit = commitNameToRef $ N commit
1113+ , _thunkRev_nixSha256 = hash
1116+ forcePP :: Name entity -> m (URI.RText 'URI.PathPiece)
1117+ forcePP = URI.mkPathPiece . untagName
1124+gitThunkRev s commit = do
1125+ let u = _gitSource_url s
1126+ protocols = ["file", "https", "ssh", "git"]
1127+ scheme = maybe "file" URI.unRText $ URI.uriScheme $ (\(GitUri x) -> x) u
1128+ unless (T.toLower scheme `elem` protocols) $
1129+ failWith $ "obelisk currently only supports "
1130+ <> T.intercalate ", " protocols <> " protocols for plain Git remotes"
1131+ hash <- nixPrefetchGit u commit $ _gitSource_fetchSubmodules s
1132+ putLog Informational $ "Nix sha256 is " <> hash
1134+ { _thunkRev_commit = commitNameToRef (N commit)
1135+ , _thunkRev_nixSha256 = hash
781−parseSshShorthand :: Text -> Maybe URI
1138+-- | Given the URI to a git remote, and an optional branch name, return the name
1139+-- of the branch along with the hash of the commit at tip of that branch.
1141+-- If the branch name is passed in, it is returned exactly as-is. If it is not
1142+-- passed it, the default branch of the repo is used instead.
1145+ :: MonadObelisk m => GitUri -> Maybe Text -> m (Text, CommitId)
1146+gitGetCommitBranch uri mbranch = withExitFailMessage ("Failure for git remote " <> uriMsg) $ do
1147+ (_, bothMaps) <- gitLsRemote
1148+ (T.unpack $ gitUriToText uri)
1149+ (GitRef_Branch <$> mbranch)
1151+ branch <- case mbranch of
1152+ Nothing -> withExitFailMessage "Failed to find default branch" $ do
1153+ b <- rethrowE $ gitLookupDefaultBranch bothMaps
1154+ putLog Debug $ "Default branch for remote repo " <> uriMsg <> " is " <> b
1157+ commit <- rethrowE $ gitLookupCommitForRef bothMaps (GitRef_Branch branch)
1158+ putLog Informational $ "Latest commit in branch " <> branch
1159+ <> " from remote repo " <> uriMsg
1160+ <> " is " <> commit
1161+ pure (branch, commit)
1163+ rethrowE = either failWith pure
1164+ uriMsg = gitUriToText uri
1166+parseGitUri :: Text -> Maybe GitUri
1167+parseGitUri x = GitUri <$> (parseFileURI x <|> parseAbsoluteURI x <|> parseSshShorthand x)
1169+parseFileURI :: Text -> Maybe URI.URI
1170+parseFileURI uri = if "/" `T.isPrefixOf` uri then parseAbsoluteURI ("file://" <> uri) else Nothing
1172+parseAbsoluteURI :: Text -> Maybe URI.URI
1173+parseAbsoluteURI uri = do
1174+ parsedUri <- URI.mkURI uri
1175+ guard $ URI.isPathAbsolute parsedUri
1178+parseSshShorthand :: Text -> Maybe URI.URI
782parseSshShorthand uri = do
1179parseSshShorthand uri = do
783 -- This is what git does to check that the remote
1180 -- This is what git does to check that the remote
784 -- is not a local file path when parsing shorthand.
1181 -- is not a local file path when parsing shorthand.
@@ -791,8 +1188,4 @@ parseSshShorthand uri = do
791 -- This check is used to disambiguate a filepath containing a colon from shorthand
1188 -- This check is used to disambiguate a filepath containing a colon from shorthand
792 guard $ isNothing (T.findIndex (=='/') authAndHostname)
1189 guard $ isNothing (T.findIndex (=='/') authAndHostname)
793 && not (T.null colonAndPath)
1190 && not (T.null colonAndPath)
794− parseURI $ T.unpack properUri
1191+ URI.mkURI properUri
797−readGitProcess :: MonadObelisk m => FilePath -> [String] -> m Text
798−readGitProcess repo args = fmap T.pack $ readProcessAndLogStderr Notice $ git repo [args]