@@ -5,82 +5,70 @@
55{-# LANGUAGE MultiWayIf #-}
66{-# LANGUAGE OverloadedStrings #-}
77{-# LANGUAGE PatternGuards #-}
8−{-# LANGUAGE TemplateHaskell #-}
9−
10−module Obelisk.Command.Thunk
11− ( ThunkPtr (..)
12− , ThunkRev (..)
13− , ThunkSource (..)
14− , ThunkData (..)
15− , ReadThunkError (..)
16− , GitHubSource (..)
17− , getLatestRev
18− , updateThunkToLatest
19− , createThunk
20− , createThunkWithLatest
21− , nixBuildAttrWithCache
22− , nixBuildThunkAttrWithCache
23− , unpackThunk
24− , packThunk
25− , readThunk
26− , getThunkPtr
27− ) where
8+{-# LANGUAGE QuasiQuotes #-}
9+{-# LANGUAGE ScopedTypeVariables #-}
10+{-# LANGUAGE TypeApplications #-}
11+module Obelisk.Command.Thunk where
2812
2913import Control.Applicative
30−import Control.Exception (displayException, throwIO)
14+import Control.Exception (displayException, try)
15+import Control.Lens (ifor, ifor_, (.~))
3116import Control.Monad
32−import Control.Monad.Catch (handle)
17+import Control.Monad.Extra (findM)
18+import Control.Monad.Catch (MonadCatch, handle)
3319import Control.Monad.Except
34−import Data.Aeson (decode, (.=))
20+import Data.Aeson ((.=))
3521import qualified Data.Aeson as Aeson
3622import Data.Aeson.Encode.Pretty
23+import qualified Data.Aeson.Types as Aeson
24+import Data.Bifunctor (first)
3725import qualified Data.ByteString.Lazy as LBS
26+import Data.Containers.ListUtils (nubOrd)
3827import Data.Default
39−import Data.Foldable
28+import Data.Either.Combinators (fromRight', rightToMaybe)
29+import Data.Foldable (toList)
30+import Data.Function ((&))
31+import Data.Functor ((<&>))
4032import Data.Git.Ref (Ref)
4133import qualified Data.Git.Ref as Ref
4234import qualified Data.List as L
43−import Data.List.NonEmpty (NonEmpty (..))
35+import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
4436import qualified Data.List.NonEmpty as NonEmpty
37+import Data.Map (Map)
4538import qualified Data.Map as Map
4639import Data.Maybe
47−import Data.Monoid
4840import Data.Set (Set)
4941import qualified Data.Set as Set
42+import Data.String.Here.Interpolated (i)
43+import Data.String.Here.Uninterpolated (here)
5044import Data.Text (Text)
5145import qualified Data.Text as T
5246import Data.Text.Encoding
5347import qualified Data.Text.IO as T
5448import Data.Time.Clock.POSIX (posixSecondsToUTCTime)
55−import Data.Yaml (parseMaybe, (.:))
56−import qualified Data.Yaml as Yaml
49+import Data.Traversable (for)
50+import Data.Yaml (parseMaybe)
5751import GitHub
5852import GitHub.Data.Name
59−import GitHub.Endpoints.Repos.Contents (archiveForR)
60−import Network.URI
6153import Obelisk.Command.Nix
6254import System.Directory
6355import System.Exit
6456import System.FilePath
65−import System.IO
6657import System.IO.Error
6758import System.IO.Temp
68−import System.Posix (getSymbolicLinkStatus, modificationTime)
69−import System.Process (StdStream (CreatePipe), callProcess, createProcess, proc, readProcess, std_err,
70− std_out, waitForProcess)
59+import System.PosixCompat.Files (getSymbolicLinkStatus, modificationTime)
60+import qualified Text.URI as URI
7161
72−import Development.Placeholders
7362import Obelisk.App (MonadObelisk)
74−import Obelisk.CLI (Severity (..), callProcessAndLogOutput, failWith, putLog, withSpinner)
75−import Obelisk.Command.Utils (checkGitCleanStatus, cp, procWithPackages)
63+import Obelisk.CliApp
64+import Obelisk.Command.Utils
7665
7766--TODO: Support symlinked thunk data
7867data ThunkData
79− = ThunkData_Packed ThunkPtr
68+ = ThunkData_Packed ThunkSpec ThunkPtr
8069 -- ^ Packed thunk
81− | ThunkData_Checkout (Maybe ThunkPtr)
70+ | ThunkData_Checkout
8271 -- ^ Checked out thunk that was unpacked from this pointer
83− deriving (Show, Eq, Ord)
8472
8573-- | A reference to the exact data that a thunk should translate into
8674data ThunkPtr = ThunkPtr
@@ -93,7 +81,7 @@ type NixSha256 = Text --TODO: Use a smart constructor and make this actually ver
9381
9482-- | A specific revision of data; it may be available from multiple sources
9583data ThunkRev = ThunkRev
96− { _thunkRev_commit :: Ref
84+ { _thunkRev_commit :: Ref Ref.SHA1
9785 , _thunkRev_nixSha256 :: NixSha256
9886 }
9987 deriving (Show, Eq, Ord)
@@ -106,6 +94,11 @@ data ThunkSource
10694 | ThunkSource_Git GitSource
10795 deriving (Show, Eq, Ord)
10896
97+thunkSourceToGitSource :: ThunkSource -> GitSource
98+thunkSourceToGitSource = \case
99+ ThunkSource_GitHub s -> forgetGithub False s
100+ ThunkSource_Git s -> s
101+
109102data GitHubSource = GitHubSource
110103 { _gitHubSource_owner :: Name Owner
111104 , _gitHubSource_repo :: Name Repo
@@ -114,158 +107,263 @@ data GitHubSource = GitHubSource
114107 }
115108 deriving (Show, Eq, Ord)
116109
110+newtype GitUri = GitUri { unGitUri :: URI.URI } deriving (Eq, Ord, Show)
111+
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
118+
117119data GitSource = GitSource
118− { _gitSource_url :: URI
119− --TODO: Is it ok to use the types from the GitHub api bindings?
120+ { _gitSource_url :: GitUri
120121 , _gitSource_branch :: Maybe (Name Branch)
121122 , _gitSource_fetchSubmodules :: Bool
123+ , _gitSource_private :: Bool
122124 }
123125 deriving (Show, Eq, Ord)
124126
125−commitNameToRef :: Name Commit -> Ref
127+newtype ThunkConfig = ThunkConfig
128+ { _thunkConfig_private :: Maybe Bool
129+ } deriving Show
130+
131+data ThunkUpdateConfig = ThunkUpdateConfig
132+ { _thunkUpdateConfig_branch :: Maybe String
133+ , _thunkUpdateConfig_config :: ThunkConfig
134+ } deriving Show
135+
136+data ThunkPackConfig = ThunkPackConfig
137+ { _thunkPackConfig_force :: Bool
138+ , _thunkPackConfig_config :: ThunkConfig
139+ } deriving Show
140+
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
148+ <$ guard useSsh
149+ , URI.authHost = fromRight' $ URI.mkHost "github.com"
150+ , URI.authPort = Nothing
151+ }
152+ , URI.uriPath = Just ( False
153+ , fromRight' . URI.mkPathPiece <$>
154+ untagName (_gitHubSource_owner s)
155+ :| [ untagName (_gitHubSource_repo s) <> ".git" ]
156+ )
157+ , URI.uriQuery = []
158+ , URI.uriFragment = Nothing
159+ }
160+ , _gitSource_branch = _gitHubSource_branch s
161+ , _gitSource_fetchSubmodules = False
162+ , _gitSource_private = _gitHubSource_private s
163+ }
164+
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
169+
170+commitNameToRef :: Name Commit -> Ref Ref.SHA1
126171commitNameToRef (N c) = Ref.fromHex $ encodeUtf8 c
127172
128173-- TODO: Use spinner here.
129−getNixSha256ForUriUnpacked :: URI -> IO NixSha256
130−getNixSha256ForUriUnpacked uri = do
131− --TODO: Make this package depend on nix-prefetch-url properly
132− let cmd = proc "nix-prefetch-url" ["--unpack" , "--type" , "sha256" , show uri]
133− (_, Just out, Just err, p) <- createProcess cmd
134− { std_out = CreatePipe
135− , std_err = CreatePipe
136− }
137− --TODO: Deal with errors here; usually they're HTTP errors
138− waitForProcess p >>= \case
139− ExitSuccess -> return ()
140− _ -> do
141− hPutStrLn stdout =<< hGetContents out
142− hPutStrLn stderr =<< hGetContents err
143− --TODO: actual error
144− fail "nix-prefetch-url"
145− T.strip <$> T.hGetContents out
174+getNixSha256ForUriUnpacked
175+ :: MonadObelisk m
176+ => GitUri
177+ -> m NixSha256
178+getNixSha256ForUriUnpacked uri =
179+ withExitFailMessage ("nix-prefetch-url: Failed to determine sha256 hash of URL " <> gitUriToText uri) $ do
180+ [hash] <- fmap T.lines $ readProcessAndLogOutput (Debug, Debug) $
181+ proc nixPrefetchUrlPath ["--unpack", "--type", "sha256", T.unpack $ gitUriToText uri]
182+ pure hash
146183
147−-- | Get the latest revision available from the given source
148−getLatestRev :: ThunkSource -> IO ThunkRev
149−getLatestRev = \case
150− ThunkSource_GitHub s -> do
151− auth <- getHubAuth "github.com"
152− commitsResult <- executeRequestMaybe auth $ commitsWithOptionsForR
153− (_gitHubSource_owner s)
154− (_gitHubSource_repo s)
155− (FetchAtLeast 1)
156− $ case _gitHubSource_branch s of
157− Nothing -> []
158− Just b -> [CommitQuerySha $ untagName b]
159− commitInfos <- either throwIO return commitsResult
160− commitInfo : _ <- return $ toList commitInfos
161− let commit = commitSha commitInfo
162− Right archiveUri <- executeRequestMaybe auth $ archiveForR (_gitHubSource_owner s) (_gitHubSource_repo s) ArchiveFormatTarball $ Just $ untagName commit
163− nixSha256 <- getNixSha256ForUriUnpacked archiveUri
164− return $ ThunkRev
165− { _thunkRev_commit = commitNameToRef commit
166− , _thunkRev_nixSha256 = nixSha256
167− }
168− ThunkSource_Git _s -> do
169− $notImplemented
184+nixPrefetchGit :: MonadObelisk m => GitUri -> Text -> Bool -> m NixSha256
185+nixPrefetchGit uri rev fetchSubmodules =
186+ withExitFailMessage ("nix-prefetch-git: Failed to determine sha256 hash of Git repo " <> gitUriToText uri <> " at " <> rev) $ do
187+ out <- readProcessAndLogStderr Debug $
188+ proc nixPrefetchGitPath $ filter (/="")
189+ [ "--url", T.unpack $ gitUriToText uri
190+ , "--rev", T.unpack rev
191+ , if fetchSubmodules then "--fetch-submodules" else ""
192+ , "--quiet"
193+ ]
194+
195+ case parseMaybe (Aeson..: "sha256") =<< Aeson.decodeStrict (encodeUtf8 out) of
196+ Nothing -> failWith $ "nix-prefetch-git: unrecognized output " <> out
197+ Just x -> pure x
170198
171199--TODO: Pretty print these
172200data ReadThunkError
173− = ReadThunkError_WrongContents (Set String) (Set String)
174− | ReadThunkError_UnrecognizedLoader Text
175− | ReadThunkError_UnparseablePtr LBS.ByteString
176− deriving (Show)
177−
178−-- | Read a thunk and validate that it is only a thunk, either packed or unpacked.
179−-- If the thunk is packed and additional data is present, fail.
180−readThunk :: MonadObelisk m => FilePath -> m (Either ReadThunkError ThunkData)
181−readThunk thunkDir = do
182− files <- liftIO $ listDirectory thunkDir
183− case ".git" `elem` files of
184− True -> fmap ThunkData_Checkout <$> do
185− let origThunkPath = thunkDir </> ".git" </> "obelisk" </> "orig-thunk"
186− liftIO $ doesDirectoryExist origThunkPath >>= \case
187− True -> fmap Just <$> readPackedThunk origThunkPath
188− False -> return $ return Nothing
189− False -> liftIO $ fmap ThunkData_Packed <$> readPackedThunk thunkDir
201+ = ReadThunkError_UnrecognizedThunk
202+ | ReadThunkError_UnrecognizedPaths (NonEmpty FilePath)
203+ | ReadThunkError_MissingPaths (NonEmpty FilePath)
204+ | ReadThunkError_UnparseablePtr FilePath String
205+ | ReadThunkError_FileError IOError
206+ | ReadThunkError_FileDoesNotMatch FilePath Text
207+ | ReadThunkError_UnrecognizedState String
208+ | ReadThunkError_AmbiguousPackedState ThunkPtr ThunkPtr
209+ deriving (Show)
210+
211+unpackedDirName :: FilePath
212+unpackedDirName = "."
213+
214+attrCacheFileName :: FilePath
215+attrCacheFileName = ".attr-cache"
216+
217+-- | Specification for how a file in a thunk version works.
218+data ThunkFileSpec
219+ = ThunkFileSpec_Ptr (LBS.ByteString -> Either String ThunkPtr) -- ^ This file specifies 'ThunkPtr' data
220+ | ThunkFileSpec_FileMatches Text -- ^ This file must match the given content exactly
221+ | ThunkFileSpec_CheckoutIndicator -- ^ Existence of this directory indicates that the thunk is unpacked
222+ | ThunkFileSpec_AttrCache -- ^ This directory is an attribute cache
223+
224+-- | Specification for how a set of files in a thunk version work.
225+data ThunkSpec = ThunkSpec
226+ { _thunkSpec_name :: !Text
227+ , _thunkSpec_files :: !(Map FilePath ThunkFileSpec)
228+ }
229+
230+thunkSpecTypes :: NonEmpty (NonEmpty ThunkSpec)
231+thunkSpecTypes = gitThunkSpecs :| [gitHubThunkSpecs]
232+
233+-- | Attempts to match a 'ThunkSpec' to a given directory.
234+matchThunkSpecToDir
235+ :: (MonadError ReadThunkError m, MonadIO m, MonadCatch m)
236+ => ThunkSpec -- ^ 'ThunkSpec' to match against the given files/directory
237+ -> FilePath -- ^ Path to directory
238+ -> Set FilePath -- ^ Set of file paths relative to the given directory
239+ -> m ThunkData
240+matchThunkSpecToDir thunkSpec dir dirFiles = do
241+ case nonEmpty (toList $ dirFiles `Set.difference` expectedPaths) of
242+ Just fs -> throwError $ ReadThunkError_UnrecognizedPaths $ (dir </>) <$> fs
243+ Nothing -> pure ()
244+ case nonEmpty (toList $ requiredPaths `Set.difference` dirFiles) of
245+ Just fs -> throwError $ ReadThunkError_MissingPaths $ (dir </>) <$> fs
246+ Nothing -> pure ()
247+ datas <- fmap toList $ flip Map.traverseMaybeWithKey (_thunkSpec_files thunkSpec) $ \expectedPath -> \case
248+ ThunkFileSpec_AttrCache -> Nothing <$ dirMayExist expectedPath
249+ ThunkFileSpec_CheckoutIndicator -> liftIO (doesDirectoryExist (dir </> expectedPath)) <&> \case
250+ False -> Nothing
251+ True -> Just ThunkData_Checkout
252+ ThunkFileSpec_FileMatches expectedContents -> handle (\(e :: IOError) -> throwError $ ReadThunkError_FileError e) $ do
253+ actualContents <- liftIO (T.readFile $ dir </> expectedPath)
254+ case T.strip expectedContents == T.strip actualContents of
255+ True -> pure Nothing
256+ False -> throwError $ ReadThunkError_FileDoesNotMatch (dir </> expectedPath) expectedContents
257+ ThunkFileSpec_Ptr parser -> handle (\(e :: IOError) -> throwError $ ReadThunkError_FileError e) $ do
258+ let path = dir </> expectedPath
259+ liftIO (doesFileExist path) >>= \case
260+ False -> pure Nothing
261+ True -> do
262+ actualContents <- liftIO $ LBS.readFile path
263+ case parser actualContents of
264+ Right v -> pure $ Just (ThunkData_Packed thunkSpec v)
265+ Left e -> throwError $ ReadThunkError_UnparseablePtr (dir </> expectedPath) e
266+
267+ case nonEmpty datas of
268+ Nothing -> throwError ReadThunkError_UnrecognizedThunk
269+ Just xs -> fold1WithM xs $ \a b -> either throwError pure (mergeThunkData a b)
270+ where
271+ rootPathsOnly = Set.fromList . mapMaybe takeRootDir . Map.keys
272+ takeRootDir = fmap NonEmpty.head . nonEmpty . splitPath
273+
274+ expectedPaths = rootPathsOnly $ _thunkSpec_files thunkSpec
275+
276+ requiredPaths = rootPathsOnly $ Map.filter isRequiredFileSpec $ _thunkSpec_files thunkSpec
277+ isRequiredFileSpec = \case
278+ ThunkFileSpec_FileMatches _ -> True
279+ _ -> False
280+
281+ dirMayExist expectedPath = liftIO (doesFileExist (dir </> expectedPath)) >>= \case
282+ True -> throwError $ ReadThunkError_UnrecognizedPaths $ expectedPath :| []
283+ False -> pure ()
284+
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
291+
292+ bothPackedAndUnpacked = ReadThunkError_UnrecognizedState "Both packed data and checkout present"
293+
294+ fold1WithM (x :| xs) f = foldM f x xs
295+
296+readThunkWith
297+ :: (MonadObelisk m)
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}|]
190307
191308-- | Read a thunk and validate that it is exactly a packed thunk.
192309-- If additional data is present, fail.
193−readPackedThunk :: FilePath -> IO (Either ReadThunkError ThunkPtr)
194−readPackedThunk thunkDir = runExceptT $ do
195− let thunkLoader = thunkDir </> "default.nix"
196− githubJson = thunkDir </> "github.json"
197− attrCache = thunkDir </> ".attr-cache"
198− expectedContents = Set.fromList $
199− [ githubJson
200− , thunkLoader
201− ]
202− optionalContents = Set.fromList $
203− [ attrCache
204− ]
310+readThunk :: (MonadObelisk m) => FilePath -> m (Either ReadThunkError ThunkData)
311+readThunk = readThunkWith thunkSpecTypes
205312
206− -- Ensure that there aren't any other files in the thunk
207− -- NB: System.Directory.listDirectory returns the contents without the directory path
208− files <- liftIO $ Set.fromList . fmap (thunkDir </>) <$> listDirectory thunkDir
209− let unexpectedContents = files `Set.difference` (expectedContents `Set.union` optionalContents)
210− missingContents = expectedContents `Set.difference` files
211− unless (Set.null unexpectedContents && Set.null missingContents) $ do
212− throwError $ ReadThunkError_WrongContents unexpectedContents missingContents
213−
214− -- Ensure that we recognize the thunk loader
215− loader <- liftIO $ T.readFile thunkLoader
216− unless (loader `elem` gitHubStandaloneLoaders) $ do
217− throwError $ ReadThunkError_UnrecognizedLoader loader
218−
219− txt <- liftIO $ LBS.readFile githubJson
220− let parseThunk v = do
221− rev <- v Aeson..: "rev"
222− sha256 <- v Aeson..: "sha256"
223− src <- parseGitHubSource v
224− <|> parseGitSource v
225− return $ ThunkPtr
226− { _thunkPtr_rev = ThunkRev
227− { _thunkRev_commit = Ref.fromHexString rev
228− , _thunkRev_nixSha256 = sha256
229− }
230− , _thunkPtr_source = src
231− }
232− parseGitHubSource v = do
233− owner <- v Aeson..: "owner"
234− repo <- v Aeson..: "repo"
235− branch <- v Aeson..:! "branch"
236− mPrivate <- v Aeson..:! "private"
237− return $ ThunkSource_GitHub $ GitHubSource
238− { _gitHubSource_owner = owner
239− , _gitHubSource_repo = repo
240− , _gitHubSource_branch = branch
241− , _gitHubSource_private = fromMaybe False mPrivate
242− }
243− parseGitSource v = do
244− Just url <- parseURI <$> v Aeson..: "url"
245− branch <- v Aeson..:! "branch"
246− fetchSubmodules <- v Aeson..: "fetchSubmodules"
247− return $ ThunkSource_Git $ GitSource
248− { _gitSource_url = url
249− , _gitSource_branch = branch
250− , _gitSource_fetchSubmodules = fetchSubmodules
251− }
252− case parseMaybe parseThunk =<< decode txt of
253− Nothing -> throwError $ ReadThunkError_UnparseablePtr txt
254− Just ptr -> return ptr
313+parseThunkPtr :: (Aeson.Object -> Aeson.Parser ThunkSource) -> Aeson.Object -> Aeson.Parser ThunkPtr
314+parseThunkPtr parseSrc v = do
315+ rev <- v Aeson..: "rev"
316+ sha256 <- v Aeson..: "sha256"
317+ src <- parseSrc v
318+ pure $ ThunkPtr
319+ { _thunkPtr_rev = ThunkRev
320+ { _thunkRev_commit = Ref.fromHexString rev
321+ , _thunkRev_nixSha256 = sha256
322+ }
323+ , _thunkPtr_source = src
324+ }
325+
326+parseGitHubSource :: Aeson.Object -> Aeson.Parser GitHubSource
327+parseGitHubSource v = do
328+ owner <- v Aeson..: "owner"
329+ repo <- v Aeson..: "repo"
330+ branch <- v Aeson..:! "branch"
331+ private <- v Aeson..:? "private"
332+ pure $ GitHubSource
333+ { _gitHubSource_owner = owner
334+ , _gitHubSource_repo = repo
335+ , _gitHubSource_branch = branch
336+ , _gitHubSource_private = fromMaybe False private
337+ }
338+
339+parseGitSource :: Aeson.Object -> Aeson.Parser GitSource
340+parseGitSource v = do
341+ Just url <- parseGitUri <$> v Aeson..: "url"
342+ branch <- v Aeson..:! "branch"
343+ fetchSubmodules <- v Aeson..:! "fetchSubmodules"
344+ private <- v Aeson..:? "private"
345+ pure $ GitSource
346+ { _gitSource_url = url
347+ , _gitSource_branch = branch
348+ , _gitSource_fetchSubmodules = fromMaybe False fetchSubmodules
349+ , _gitSource_private = fromMaybe False private
350+ }
255351
256352overwriteThunk :: MonadObelisk m => FilePath -> ThunkPtr -> m ()
257353overwriteThunk target thunk = do
258354 -- Ensure that this directory is a valid thunk (i.e. so we aren't losing any data)
259− Right _ <- readThunk target
355+ readThunk target >>= \case
356+ Left e -> failWith [i|Invalid thunk at ${target}: ${e}|]
357+ Right _ -> pure ()
260358
261359 --TODO: Is there a safer way to do this overwriting?
262− liftIO $ removeDirectoryRecursive target
263− liftIO $ createThunk target thunk
360+ liftIO $ removePathForcibly target
361+ createThunk target $ Right thunk
264362
265−thunkPtrLoader :: ThunkPtr -> Text
266−thunkPtrLoader thunk = case _thunkPtr_source thunk of
267− ThunkSource_GitHub _ -> NonEmpty.head gitHubStandaloneLoaders
268− ThunkSource_Git _ -> NonEmpty.head plainGitStandaloneLoaders
363+thunkPtrToSpec :: ThunkPtr -> ThunkSpec
364+thunkPtrToSpec thunk = case _thunkPtr_source thunk of
365+ ThunkSource_GitHub _ -> NonEmpty.head gitHubThunkSpecs
366+ ThunkSource_Git _ -> NonEmpty.head gitThunkSpecs
269367
270368-- It's important that formatting be very consistent here, because
271369-- otherwise when people update thunks, their patches will be messy
@@ -274,21 +372,18 @@ encodeThunkPtrData (ThunkPtr rev src) = case src of
274372 ThunkSource_GitHub s -> encodePretty' githubCfg $ Aeson.object $ catMaybes
275373 [ Just $ "owner" .= _gitHubSource_owner s
276374 , Just $ "repo" .= _gitHubSource_repo s
277− , case _gitHubSource_branch s of
278− Just b -> Just $ "branch" .= b
279− Nothing -> Nothing
280− , if _gitHubSource_private s
281− then Just $ "private" .= True
282− else Nothing
375+ , ("branch" .=) <$> _gitHubSource_branch s
283376 , Just $ "rev" .= Ref.toHexString (_thunkRev_commit rev)
284377 , Just $ "sha256" .= _thunkRev_nixSha256 rev
378+ , Just $ "private" .= _gitHubSource_private s
285379 ]
286380 ThunkSource_Git s -> encodePretty' plainGitCfg $ Aeson.object $ catMaybes
287− --TODO: Is this safe? read/show is jank for `URI`
288− [ Just $ "url" .= show (_gitSource_url s)
381+ [ Just $ "url" .= gitUriToText (_gitSource_url s)
289382 , Just $ "rev" .= Ref.toHexString (_thunkRev_commit rev)
383+ , ("branch" .=) <$> _gitSource_branch s
290384 , Just $ "sha256" .= _thunkRev_nixSha256 rev
291385 , Just $ "fetchSubmodules" .= _gitSource_fetchSubmodules s
386+ , Just $ "private" .= _gitSource_private s
292387 ]
293388 where
294389 githubCfg = defConfig
@@ -309,55 +404,84 @@ encodeThunkPtrData (ThunkPtr rev src) = case src of
309404 [ "url"
310405 , "rev"
311406 , "sha256"
407+ , "private"
312408 , "fetchSubmodules"
313409 ] <> compare
314410 , confTrailingNewline = True
315411 }
316412
317−createThunk :: FilePath -> ThunkPtr -> IO ()
318−createThunk target thunk = do
319− createDirectoryIfMissing True (target </> ".attr-cache")
320− T.writeFile (target </> "default.nix") (thunkPtrLoader thunk)
321− LBS.writeFile (target </> "github.json") (encodeThunkPtrData thunk)
413+createThunk :: MonadObelisk m => FilePath -> Either ThunkSpec ThunkPtr -> m ()
414+createThunk target ptrInfo =
415+ ifor_ (_thunkSpec_files spec) $ \path -> \case
416+ ThunkFileSpec_FileMatches content -> withReadyPath path $ \p -> liftIO $ T.writeFile p content
417+ ThunkFileSpec_Ptr _ -> case ptrInfo of
418+ Left _ -> pure () -- We can't write the ptr without it
419+ Right ptr -> withReadyPath path $ \p -> liftIO $ LBS.writeFile p (encodeThunkPtrData ptr)
420+ _ -> pure ()
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
427+ f fullPath
322428
323−createThunkWithLatest :: FilePath -> ThunkSource -> IO ()
429+createThunkWithLatest :: MonadObelisk m => FilePath -> ThunkSource -> m ()
324430createThunkWithLatest target s = do
325431 rev <- getLatestRev s
326− createThunk target $ ThunkPtr
432+ createThunk target $ Right $ ThunkPtr
327433 { _thunkPtr_source = s
328434 , _thunkPtr_rev = rev
329435 }
330436
331−updateThunkToLatest :: MonadObelisk m => FilePath -> m ()
332−updateThunkToLatest target = do
333− (overwrite, ptr) <- readThunk target >>= \case
334− Left err -> failWith $ T.pack $ "thunk update: " <> show err
335− Right c -> case c of
336− ThunkData_Packed t -> return (target, t)
337− ThunkData_Checkout _ -> failWith "cannot update an unpacked thunk"
338− let src = _thunkPtr_source ptr
339− rev <- liftIO $ getLatestRev src
340− overwriteThunk overwrite $ ThunkPtr
341− { _thunkPtr_source = src
342− , _thunkPtr_rev = rev
343− }
437+updateThunkToLatest :: MonadObelisk m => ThunkUpdateConfig -> FilePath -> m ()
438+updateThunkToLatest (ThunkUpdateConfig mBranch thunkConfig) target = spinner $ do
439+ checkThunkDirectory target
440+ -- check to see if thunk should be updated to a specific branch or just update it's current branch
441+ case mBranch of
442+ Nothing -> do
443+ (overwrite, ptr) <- readThunk target >>= \case
444+ Left err -> failWith [i|Thunk update: ${err}|]
445+ Right c -> case c of
446+ ThunkData_Packed _ t -> return (target, t)
447+ ThunkData_Checkout -> failWith "cannot update an unpacked thunk"
448+ let src = _thunkPtr_source ptr
449+ rev <- getLatestRev src
450+ overwriteThunk overwrite $ modifyThunkPtrByConfig thunkConfig $ ThunkPtr
451+ { _thunkPtr_source = src
452+ , _thunkPtr_rev = rev
453+ }
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.|]
459+ where
460+ spinner = withSpinner' ("Updating thunk " <> T.pack target <> " to latest") (pure $ const $ "Thunk " <> T.pack target <> " updated to latest")
461+
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
344467
345468-- | All recognized github standalone loaders, ordered from newest to oldest.
346469-- This tool will only ever produce the newest one when it writes a thunk.
347−gitHubStandaloneLoaders :: NonEmpty Text
348−gitHubStandaloneLoaders =
349− gitHubStandaloneLoaderV3 :|
350− [ gitHubStandaloneLoaderV2
351− , gitHubStandaloneLoaderV1
470+gitHubThunkSpecs :: NonEmpty ThunkSpec
471+gitHubThunkSpecs =
472+ gitHubThunkSpecV5 :|
473+ [ gitHubThunkSpecV4
474+ , gitHubThunkSpecV3
475+ , gitHubThunkSpecV2
476+ , gitHubThunkSpecV1
352477 ]
353478
354−gitHubStandaloneLoaderV1 :: Text
355−gitHubStandaloneLoaderV1 = T.unlines
356− [ "import ((import <nixpkgs> {}).fetchFromGitHub (builtins.fromJSON (builtins.readFile ./github.json)))"
357− ]
479+gitHubThunkSpecV1 :: ThunkSpec
480+gitHubThunkSpecV1 = legacyGitHubThunkSpec "github-v1"
481+ "import ((import <nixpkgs> {}).fetchFromGitHub (builtins.fromJSON (builtins.readFile ./github.json)))"
358482
359−gitHubStandaloneLoaderV2 :: Text
360−gitHubStandaloneLoaderV2 = T.unlines
483+gitHubThunkSpecV2 :: ThunkSpec
484+gitHubThunkSpecV2 = legacyGitHubThunkSpec "github-v2" $ T.unlines
361485 [ "# DO NOT HAND-EDIT THIS FILE" --TODO: Add something about how to get more info on Obelisk, etc.
362486 , "import ((import <nixpkgs> {}).fetchFromGitHub ("
363487 , " let json = builtins.fromJSON (builtins.readFile ./github.json);"
@@ -367,8 +491,8 @@ gitHubStandaloneLoaderV2 = T.unlines
367491 , "))"
368492 ]
369493
370−gitHubStandaloneLoaderV3 :: Text
371−gitHubStandaloneLoaderV3 = T.unlines
494+gitHubThunkSpecV3 :: ThunkSpec
495+gitHubThunkSpecV3 = legacyGitHubThunkSpec "github-v3" $ T.unlines
372496 [ "# DO NOT HAND-EDIT THIS FILE"
373497 , "let"
374498 , " fetch = { private ? false, ... }@args: if private && builtins.hasAttr \"fetchGit\" builtins"
@@ -387,32 +511,151 @@ gitHubStandaloneLoaderV3 = T.unlines
387511 , "in import (fetch (builtins.fromJSON (builtins.readFile ./github.json)))"
388512 ]
389513
390−plainGitStandaloneLoaders :: NonEmpty Text
391−plainGitStandaloneLoaders =
392− plainGitStandaloneLoaderV1 :|
393− [
514+gitHubThunkSpecV4 :: ThunkSpec
515+gitHubThunkSpecV4 = legacyGitHubThunkSpec "github-v4" $ T.unlines
516+ [ "# DO NOT HAND-EDIT THIS FILE"
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;"
522+ , " };"
523+ , "in import (fetch (builtins.fromJSON (builtins.readFile ./github.json)))"
524+ ]
525+
526+legacyGitHubThunkSpec :: Text -> Text -> ThunkSpec
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)
532+ ]
533+
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;
542+ };
543+ json = builtins.fromJSON (builtins.readFile ./github.json);
544+in fetch json
545+|]
546+
547+parseGitHubJsonBytes :: LBS.ByteString -> Either String ThunkPtr
548+parseGitHubJsonBytes = parseJsonObject $ parseThunkPtr $ \v ->
549+ ThunkSource_GitHub <$> parseGitHubSource v <|> ThunkSource_Git <$> parseGitSource v
550+
551+gitThunkSpecs :: NonEmpty ThunkSpec
552+gitThunkSpecs =
553+ gitThunkSpecV5 :|
554+ [ gitThunkSpecV4
555+ , gitThunkSpecV3
556+ , gitThunkSpecV2
557+ , gitThunkSpecV1
558+ ]
559+
560+gitThunkSpecV1 :: ThunkSpec
561+gitThunkSpecV1 = legacyGitThunkSpec "git-v1" $ T.unlines
562+ [ "# DO NOT HAND-EDIT THIS FILE"
563+ , "let fetchGit = {url, rev, ref ? null, branch ? null, sha256 ? null, fetchSubmodules ? null}:"
564+ , " assert !fetchSubmodules; (import <nixpkgs> {}).fetchgit { inherit url rev sha256; };"
565+ , "in import (fetchGit (builtins.fromJSON (builtins.readFile ./git.json)))"
394566 ]
395567
396−plainGitStandaloneLoaderV1 :: Text
397−plainGitStandaloneLoaderV1 = T.unlines
398− [ $notImplemented
568+gitThunkSpecV2 :: ThunkSpec
569+gitThunkSpecV2 = legacyGitThunkSpec "git-v2" $ T.unlines
570+ [ "# DO NOT HAND-EDIT THIS FILE"
571+ , "let fetchGit = {url, rev, ref ? null, branch ? null, sha256 ? null, fetchSubmodules ? null}:"
572+ , " if builtins.hasAttr \"fetchGit\" builtins"
573+ , " then builtins.fetchGit ({ inherit url rev; } // (if branch == null then {} else { ref = branch; }))"
574+ , " else abort \"Plain Git repositories are only supported on nix 2.0 or higher.\";"
575+ , "in import (fetchGit (builtins.fromJSON (builtins.readFile ./git.json)))"
399576 ]
400577
401−-- | Look for authentication info from the 'hub' command
402−getHubAuth
403− :: Text -- ^ Domain name
404− -> IO (Maybe Auth)
405−getHubAuth domain = do
406− hubConfig <- getXdgDirectory XdgConfig "hub"
407− Yaml.decodeFile hubConfig >>= \case
408− Nothing -> return Nothing
409− Just v -> return $ flip parseMaybe v $ \v' -> do
410− Yaml.Array domainConfigs <- v' .: domain --TODO: Determine what multiple domainConfigs means
411− [Yaml.Object domainConfig] <- return $ toList domainConfigs
412− token <- domainConfig .: "oauth_token"
413− return $ OAuth $ encodeUtf8 token
414−
415−--TODO: when checking something out, make a shallow clone
578+-- This loader has a bug because @builtins.fetchGit@ is not given a @ref@
579+-- and will fail to find commits without this because it does shallow clones.
580+gitThunkSpecV3 :: ThunkSpec
581+gitThunkSpecV3 = legacyGitThunkSpec "git-v3" $ T.unlines
582+ [ "# DO NOT HAND-EDIT THIS FILE"
583+ , "let fetch = {url, rev, ref ? null, sha256 ? null, fetchSubmodules ? false, private ? false, ...}:"
584+ , " let realUrl = let firstChar = builtins.substring 0 1 url; in"
585+ , " if firstChar == \"/\" then /. + url"
586+ , " else if firstChar == \".\" then ./. + url"
587+ , " else url;"
588+ , " in if !fetchSubmodules && private then builtins.fetchGit {"
589+ , " url = realUrl; inherit rev;"
590+ , " } else (import <nixpkgs> {}).fetchgit {"
591+ , " url = realUrl; inherit rev sha256;"
592+ , " };"
593+ , "in import (fetch (builtins.fromJSON (builtins.readFile ./git.json)))"
594+ ]
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"
603+ , " else 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;"
609+ , " };"
610+ , "in import (fetch (builtins.fromJSON (builtins.readFile ./git.json)))"
611+ ]
612+
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)
619+ ]
620+
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
628+ else 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;
634+ };
635+ json = builtins.fromJSON (builtins.readFile ./git.json);
636+in fetch json
637+|]
638+
639+parseGitJsonBytes :: LBS.ByteString -> Either String ThunkPtr
640+parseGitJsonBytes = parseJsonObject $ parseThunkPtr $ fmap ThunkSource_Git . parseGitSource
641+
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)
649+ ]
650+ where
651+ defaultNixViaSrc = [here|
652+# DO NOT HAND-EDIT THIS FILE
653+import (import ./thunk.nix)
654+|]
655+
656+
657+parseJsonObject :: (Aeson.Object -> Aeson.Parser a) -> LBS.ByteString -> Either String a
658+parseJsonObject p bytes = Aeson.parseEither p =<< Aeson.eitherDecode bytes
416659
417660-- | Checks a cache directory to see if there is a fresh symlink
418661-- to the result of building an attribute of a thunk.
@@ -420,42 +663,49 @@ getHubAuth domain = do
420663-- and the result is symlinked into the cache.
421664nixBuildThunkAttrWithCache
422665 :: MonadObelisk m
423− => FilePath
666+ => ThunkSpec
667+ -> FilePath
424668 -- ^ Path to directory containing Thunk
425669 -> String
426670 -- ^ Attribute to build
427− -> m FilePath
671+ -> m (Maybe FilePath)
428672 -- ^ Symlink to cached or built nix output
429673-- WARNING: If the thunk uses an impure reference such as '<nixpkgs>'
430674-- the caching mechanism will fail as it merely measures the modification
431675-- time of the cache link and the expression to build.
432−nixBuildThunkAttrWithCache thunkDir attr = do
433− --NB: Expects thunkDir to be normalised with no trailing path separator.
434− --This should be guaranteed by the command argument parser.
435− let cacheErrHandler e
436− | isDoesNotExistError e = return Nothing -- expected from a cache miss
437− | otherwise = putLog Error (T.pack $ displayException e) >> return Nothing
438− cacheDir = thunkDir </> ".attr-cache"
439− cachePath = cacheDir </> attr <.> "out"
440− liftIO $ createDirectoryIfMissing False cacheDir
441− latestChange <- liftIO $ maximum <$> mapM (getModificationTime . (thunkDir </>)) ["default.nix", "github.json"]
442− cacheHit <- handle cacheErrHandler $ do
443− cacheTime <- liftIO $ posixSecondsToUTCTime . realToFrac . modificationTime <$> getSymbolicLinkStatus cachePath
444− return $ if latestChange <= cacheTime
445− then Just cachePath
446− else Nothing
447− case cacheHit of
448− Just c -> return c
449− Nothing -> do
450− putLog Warning $ T.pack $ mconcat [thunkDir, ": ", attr, " not cached, building ..."]
451− _ <- nixBuild $ def
452− { _nixBuildConfig_target = Target
453− { _target_path = thunkDir
454− , _target_attr = Just attr
455− }
456− , _nixBuildConfig_outLink = OutLink_IndirectRoot cachePath
457− }
458− return cachePath
676+nixBuildThunkAttrWithCache thunkSpec thunkDir attr = do
677+ latestChange <- liftIO $ do
678+ let
679+ getModificationTimeMaybe = fmap rightToMaybe . try @IOError . getModificationTime
680+ thunkFileNames = Map.keys $ _thunkSpec_files thunkSpec
681+ maximum . catMaybes <$> traverse (getModificationTimeMaybe . (thunkDir </>)) thunkFileNames
682+
683+ let cachePaths' = nonEmpty $ Map.keys $ Map.filter (\case ThunkFileSpec_AttrCache -> True; _ -> False) $
684+ _thunkSpec_files thunkSpec
685+ for cachePaths' $ \cachePaths ->
686+ fmap NonEmpty.head $ for cachePaths $ \cacheDir -> do
687+ let
688+ cachePath = thunkDir </> cacheDir </> attr <.> "out"
689+ cacheErrHandler e
690+ | isDoesNotExistError e = pure Nothing -- expected from a cache miss
691+ | otherwise = Nothing <$ putLog Error (T.pack $ displayException e)
692+ cacheHit <- handle cacheErrHandler $ do
693+ cacheTime <- liftIO $ posixSecondsToUTCTime . realToFrac . modificationTime <$> getSymbolicLinkStatus cachePath
694+ pure $ if latestChange <= cacheTime
695+ then Just cachePath
696+ else Nothing
697+ case cacheHit of
698+ Just c -> pure c
699+ Nothing -> do
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
708+ }
459709
460710-- | Build a nix attribute, and cache the result if possible
461711nixBuildAttrWithCache
@@ -466,212 +716,476 @@ nixBuildAttrWithCache
466716 -- ^ Attribute to build
467717 -> m FilePath
468718 -- ^ Symlink to cached or built nix output
469−nixBuildAttrWithCache exprPath attr = do
470− readThunk exprPath >>= \case
471− -- Only packed thunks are cached. in particular, checkouts are not
472− Right (ThunkData_Packed _) -> nixBuildThunkAttrWithCache exprPath attr
473− _ -> nixBuild $ def
474− { _nixBuildConfig_target = Target
475− { _target_path = exprPath
719+nixBuildAttrWithCache exprPath attr = readThunk exprPath >>= \case
720+ -- Only packed thunks are cached. In particular, checkouts are not.
721+ Right (ThunkData_Packed spec _) ->
722+ maybe build pure =<< nixBuildThunkAttrWithCache spec exprPath attr
723+ _ -> build
724+ where
725+ build = nixCmd $ NixCmd_Build $ def
726+ & nixBuildConfig_outLink .~ OutLink_None
727+ & nixCmdConfig_target .~ Target
728+ { _target_path = Just exprPath
476729 , _target_attr = Just attr
730+ , _target_expr = Nothing
477731 }
478− , _nixBuildConfig_outLink = OutLink_None
479− }
480732
481−unpackThunk
482− :: MonadObelisk m
483− => FilePath
484− -> m ()
485−unpackThunk thunkDir = readThunk thunkDir >>= \case
486− Left err -> failWith $ "thunk unpack: " <> (T.pack $ show err)
487− --TODO: Overwrite option that rechecks out thunk; force option to do so even if working directory is dirty
488− Right (ThunkData_Checkout _) -> failWith "thunk unpack: thunk is already unpacked"
489− Right (ThunkData_Packed tptr) -> case _thunkPtr_source tptr of
490− ThunkSource_GitHub s | (thunkParent, thunkName) <- splitFileName thunkDir -> withTempDirectory thunkParent thunkName $ \tmpRepo -> do
491− mauth <- liftIO $ getHubAuth "github.com"
492− repoResult <- liftIO $ executeRequestMaybe mauth $ repositoryR (_gitHubSource_owner s) (_gitHubSource_repo s)
493− githubURI <- liftIO $ either throwIO (return . repoSshUrl) repoResult >>= \case
494− Nothing -> fail "Cannot determine clone URI for thunk source"
495− Just c -> return $ T.unpack $ getUrl c
496− withSpinner ("Retrieving thunk " <> T.pack thunkName <> " from GitHub") $ do
497− callProcessAndLogOutput (Notice, Notice) $
498− proc "hub" ["clone", "-n", githubURI, tmpRepo]
499− let obGitDir = tmpRepo </> ".git" </> "obelisk"
500− --If this directory already exists then something is weird and we should fail
501− liftIO $ createDirectory obGitDir
502− callProcessAndLogOutput (Notice, Error) $
503− cp ["-r", "-T", thunkDir </> ".", obGitDir </> "orig-thunk"]
504− withSpinner ("Preparing thunk in " <> T.pack thunkDir) $ do
505− -- Checkout
506− putLog Notice $ "Checking out " <> T.pack (show $ maybe "" untagName $ _gitHubSource_branch s)
507− callProcessAndLogOutput (Notice, Notice) $
508− proc "hub" $ concat
509− [ ["-C", tmpRepo]
510− , pure "checkout"
511− , maybe [] (\n -> ["-B", T.unpack (untagName n)]) (_gitHubSource_branch s)
512− , pure $ Ref.toHexString $ _thunkRev_commit $ _thunkPtr_rev tptr
513− ]
514− -- Set upstream branch
515− forM_ (_gitHubSource_branch s) $ \branch ->
516− callProcessAndLogOutput (Notice, Error) $
517− proc "hub" ["-C", tmpRepo, "branch", "-u", "origin/" <> T.unpack (untagName branch)]
518− callProcessAndLogOutput (Notice, Error) $
519− proc "rm" ["-r", thunkDir]
733+-- | Safely update thunk using a custom action
734+--
735+-- A temporary working space is used to do any update. When the custom
736+-- action successfully completes, the resulting (packed) thunk is copied
737+-- back to the original location.
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'
742+ result <- f p'
743+ updateThunkFromTmp p'
744+ return result
745+ where
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"
520750 callProcessAndLogOutput (Notice, Error) $
521− procWithPackages ["coreutils"] "mv"
522− [ "-T"
523− , tmpRepo
524− , thunkDir
525− ]
526− ThunkSource_Git _s -> do
527− $notImplemented
528−
529−--TODO: add force mode to pack even if changes are present
530−--TODO: add a rollback mode to pack to the original thunk
531−packThunk
751+ proc cp ["-r", "-T", thunkDir, tmpThunk]
752+ return 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]
758+
759+finalMsg :: Bool -> (a -> Text) -> Maybe (a -> Text)
760+finalMsg noTrail s = if noTrail then Nothing else Just s
761+
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}|]
769+
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|]
774+ Left _ -> pure ()
775+
776+unpackThunk :: MonadObelisk m => FilePath -> m ()
777+unpackThunk = unpackThunk' False
778+
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}|]
782+ --TODO: Overwrite option that rechecks out thunk; force option to do so even if working directory is dirty
783+ Right ThunkData_Checkout -> failWith [i|Thunk at ${thunkDir} is already unpacked|]
784+ Right (ThunkData_Packed _ tptr) -> do
785+ let (thunkParent, thunkName) = splitFileName thunkDir
786+ withTempDirectory thunkParent thunkName $ \tmpThunk -> do
787+ let
788+ gitSrc = thunkSourceToGitSource $ _thunkPtr_source tptr
789+ newSpec = case _thunkPtr_source tptr of
790+ ThunkSource_GitHub _ -> NonEmpty.head gitHubThunkSpecs
791+ ThunkSource_Git _ -> NonEmpty.head gitThunkSpecs
792+ withSpinner' ("Fetching thunk " <> T.pack thunkName)
793+ (finalMsg noTrail $ const $ "Fetched thunk " <> T.pack thunkName) $ do
794+ let unpackedPath = tmpThunk </> unpackedDirName
795+ gitCloneForThunkUnpack gitSrc (_thunkRev_commit $ _thunkPtr_rev tptr) unpackedPath
796+
797+ let normalizeMore = dropTrailingPathSeparator . normalise
798+ when (normalizeMore unpackedPath /= normalizeMore tmpThunk) $ -- Only write meta data if the checkout is not inplace
799+ createThunk tmpThunk $ Left newSpec
800+
801+ liftIO $ do
802+ removePathForcibly thunkDir
803+ renameDirectory tmpThunk thunkDir
804+
805+gitCloneForThunkUnpack
532806 :: MonadObelisk m
533− => FilePath
534− -> String
807+ => GitSource -- ^ Git source to use
808+ -> Ref hash -- ^ Commit hash to reset to
809+ -> FilePath -- ^ Directory to clone into
535810 -> m ()
536−packThunk thunkDir upstream = readThunk thunkDir >>= \case
537− Left err -> failWith $ T.pack $ "thunk pack: " <> show err
538− Right (ThunkData_Packed _) -> failWith "pack: thunk is already packed"
539− Right (ThunkData_Checkout _) -> do
540− thunkPtr <- getThunkPtr thunkDir upstream
541− liftIO $ callProcess "rm"
542− [ "-rf"
543− , thunkDir
811+gitCloneForThunkUnpack gitSrc commit dir = do
812+ let git = callProcessAndLogOutput (Notice, Notice) . gitProc dir
813+ git $ [ "clone" ]
814+ ++ ["--recursive" | _gitSource_fetchSubmodules gitSrc]
815+ ++ [ T.unpack $ gitUriToText $ _gitSource_url gitSrc ]
816+ ++ do branch <- maybeToList $ _gitSource_branch gitSrc
817+ [ "--branch", T.unpack $ untagName branch ]
818+ git ["reset", "--hard", Ref.toHexString commit]
819+ when (_gitSource_fetchSubmodules gitSrc) $
820+ git ["submodule", "update", "--recursive", "--init"]
821+
822+--TODO: add a rollback mode to pack to the original thunk
823+packThunk :: MonadObelisk m => ThunkPackConfig -> FilePath -> m ThunkPtr
824+packThunk = packThunk' False
825+
826+packThunk' :: MonadObelisk m => Bool -> ThunkPackConfig -> FilePath -> m ThunkPtr
827+packThunk' noTrail (ThunkPackConfig force thunkConfig) thunkDir = checkThunkDirectory thunkDir *> readThunk thunkDir >>= \case
828+ Right ThunkData_Packed{} -> failWith [i|Thunk at ${thunkDir} is is already packed|]
829+ _ -> withSpinner'
830+ ("Packing thunk " <> T.pack thunkDir)
831+ (finalMsg noTrail $ const $ "Packed thunk " <> T.pack thunkDir) $
832+ do
833+ let checkClean = if force then CheckClean_NoCheck else CheckClean_FullCheck
834+ thunkPtr <- modifyThunkPtrByConfig thunkConfig <$> getThunkPtr checkClean thunkDir (_thunkConfig_private thunkConfig)
835+ liftIO $ removePathForcibly thunkDir
836+ createThunk thunkDir $ Right thunkPtr
837+ pure thunkPtr
838+
839+modifyThunkPtrByConfig :: ThunkConfig -> ThunkPtr -> ThunkPtr
840+modifyThunkPtrByConfig (ThunkConfig markPrivate') ptr = case markPrivate' of
841+ Nothing -> ptr
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 }
845+ }
846+
847+data CheckClean
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
854+
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
863+
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"
870+
871+ -- Check whether there are any stashes
872+ when checkClean $ do
873+ stashOutput <- readGitProcess thunkDir ["stash", "list"]
874+ unless (T.null stashOutput) $
875+ failWith $ T.unlines $
876+ [ "thunk pack: thunk checkout has stashes"
877+ , "git stash list:"
878+ ] ++ T.lines stashOutput
879+
880+ -- Get current branch
881+ (mCurrentBranch, mCurrentCommit) <- do
882+ b <- listToMaybe . T.lines <$> readGitProcess thunkDir ["rev-parse", "--abbrev-ref", "HEAD"]
883+ c <- listToMaybe . T.lines <$> readGitProcess thunkDir ["rev-parse", "HEAD"]
884+ case b of
885+ (Just "HEAD") -> failWith $ T.unlines
886+ [ "thunk pack: You are in 'detached HEAD' state."
887+ , "If you want to pack at the current ref \
888+ \then please create a new branch with 'git checkout -b <new-branch-name>' and push this upstream."
889+ ]
890+ _ -> return (b, c)
891+
892+ -- Get information on all branches and their (optional) designated upstream
893+ -- correspondents
894+ headDump :: [Text] <- T.lines <$> readGitProcess thunkDir
895+ [ "for-each-ref"
896+ , "--format=%(refname:short) %(upstream:short) %(upstream:remotename)"
897+ , "refs/heads/"
898+ ]
899+
900+ (headInfo :: Map Text (Maybe (Text, Text)))
901+ <- fmap Map.fromList $ forM headDump $ \line -> do
902+ (branch : restOfLine) <- pure $ T.words line
903+ mUpstream <- case restOfLine of
904+ [] -> pure Nothing
905+ [u, r] -> pure $ Just (u, r)
906+ (_:_) -> failWith "git for-each-ref invalid output"
907+ pure (branch, mUpstream)
908+
909+ putLog Debug $ "branches: " <> T.pack (show headInfo)
910+
911+ let errorMap :: Map Text ()
912+ headUpstream :: Map Text (Text, Text)
913+ (errorMap, headUpstream) = flip Map.mapEither headInfo $ \case
914+ Nothing -> Left ()
915+ Just b -> Right b
916+
917+ putLog Debug $ "branches with upstream branch set: " <> T.pack (show headUpstream)
918+
919+ -- Check that every branch has a remote equivalent
920+ when checkClean $ do
921+ let untrackedBranches = Map.keys errorMap
922+ when (not $ L.null untrackedBranches) $ failWith $ T.unlines $
923+ [ "thunk pack: Certain branches in the thunk have no upstream branch \
924+ \set. This means we don't know to check whether all your work is \
925+ \saved. The offending branches are:"
926+ , ""
927+ , T.unwords untrackedBranches
928+ , ""
929+ , "To fix this, you probably want to do:"
930+ , ""
931+ ] ++
932+ ((\branch -> "git push -u origin " <> branch) <$> untrackedBranches) ++
933+ [ ""
934+ , "These will push the branches to the default remote under the same \
935+ \name, and (thanks to the `-u`) remember that choice so you don't \
936+ \get this error again."
544937 ]
545− withSpinner ("Packing thunk " <> T.pack thunkDir) $
546− liftIO $ createThunk thunkDir thunkPtr
547−
548−getThunkPtr :: MonadObelisk m => FilePath -> String -> m ThunkPtr
549−getThunkPtr thunkDir upstream = do
550− liftIO (checkGitCleanStatus thunkDir) >>= \case
551− False -> do
552− statusDebug <- liftIO $ fmap (T.strip . T.pack) $ readProcess "hub"
553− [ "-C", thunkDir, "status", "--ignored" ] ""
554− putLog Warning "cannot proceed with unsaved working copy (git status):"
555− putLog Notice statusDebug
556− failWith "thunk pack: thunk checkout contains unsaved modifications"
557− True -> return ()
558−
559− -- Check whether there are any stashes
560− stashOutput <- liftIO $ fmap T.pack $ readProcess "hub" [ "-C", thunkDir, "stash", "list" ] ""
561− case T.null stashOutput of
562− False -> do
563− failWith $ T.unlines $
564− [ "thunk pack: thunk checkout has stashes"
565− , "git stash list:"
566− ] ++ T.lines stashOutput
567− True -> return ()
568−
569− --Check whether all local heads are pushed
570− repoHeads <- liftIO $ lines <$> readProcess "hub"
571− [ "-C", thunkDir
572− , "for-each-ref", "--format=%(refname:short)", "refs/heads/"
573− ] ""
574− remotes <- liftIO $ lines <$> readProcess "hub" [ "-C", thunkDir, "remote" ] ""
575− --Check that the upstream specified actually exists
576− case L.find (== upstream) remotes of
577− Nothing -> failWith $ T.pack $ "thunk pack: upstream " <> upstream <> " does not exist. Available upstreams are " <> L.intercalate ", " remotes
578− Just _ -> return ()
579− -- iterate over cartesian product
580− forM_ repoHeads $ \hd -> do
581− [localRev] <- liftIO $ lines <$> readProcess "hub" [ "-C", thunkDir, "rev-parse", hd ] ""
582− forM_ remotes $ \rm -> do
583− --TODO: The error you get if a branch isn't pushed anywhere could be made more user friendly
584− [remoteMergeRev] <- liftIO $ lines <$> readProcess "hub"
585− [ "-C", thunkDir
586− , "merge-base"
587− , localRev
588− , "remotes/" <> rm <> "/" <> hd
589− ] ""
590− case remoteMergeRev == localRev of
591− False -> failWith $ T.pack $ mconcat [ "thunk unpack: branch ", hd, " has not been pushed to ", rm ]
592− True -> return ()
593−
594− --We assume it's safe to pack the thunk at this point
595− [remoteUri'] <- liftIO $ lines <$> readProcess "hub"
596− [ "-C", thunkDir
597− , "config", "--get", "remote." <> upstream <> ".url"
598− ] ""
599−
600− let uriParseFailure = "Could not identify git remote: " <> remoteUri'
601− mRemoteUri = parseURIReference remoteUri'
602− <|> parseSshShorthand remoteUri'
603− case mRemoteUri of
604− Nothing -> failWith $ T.pack uriParseFailure
605− Just remoteUri -> liftIO $ do
606− refs <- fmap (refsToTuples . words) . lines <$> readProcess "hub"
607− [ "-C"
608− , thunkDir
609− , "show-ref"
610− , "--head" ] ""
611− -- safe because exactly one hash is associated with HEAD
612− let Just currentHead = fst <$> L.find ((== "HEAD") . snd) refs
613− remoteHeads = Map.fromList $ catMaybes $ fmap
614− (\(x,y) -> (,) x <$> L.stripPrefix ("refs/remotes/" <> upstream <> "/") y)
615− refs
616− localHeads = Map.fromList $ catMaybes $ fmap
617− (\(x,y) -> (,) x <$> L.stripPrefix "refs/heads/" y)
618− refs
619− currentUpstreamBranch = Map.lookup currentHead remoteHeads
620− <|> Map.lookup currentHead localHeads
621− if
622− | isGithubThunk remoteUri -> githubThunkPtr remoteUri currentHead currentUpstreamBranch
623− | otherwise -> gitThunkPtr remoteUri currentHead currentUpstreamBranch
624− where
625− refsToTuples [x, y] = (x, y)
626− refsToTuples x = error $ "thunk pack: cannot parse ref " <> show x
627− isGithubThunk u
628− | Just uriAuth <- uriAuthority u
629− = case uriScheme u of
630− "ssh:" -> uriAuth == URIAuth "git@" "github.com" ""
631− s -> s `L.elem` [ "git:", "https:", "http:" ] -- "http:" just redirects to "https:"
632− && uriRegName uriAuth == "github.com"
633− | otherwise = False
634− githubThunkPtr u commit' branch' = do
635− ["/", owner', repo'] <- return $ splitDirectories (uriPath u)
636− let owner = N (T.pack owner')
637− repo = N (T.pack (dropExtension repo'))
638− commit = N (T.pack commit')
639− branch = N . T.pack <$> branch'
640− mauth <- getHubAuth "github.com"
641− repoResult <- executeRequestMaybe mauth $ repositoryR owner repo
642− repoIsPrivate <- either throwIO (return . repoPrivate) repoResult
643− archiveResult <- executeRequestMaybe mauth $
644− archiveForR owner repo ArchiveFormatTarball (Just (untagName commit))
645− archiveUri <- either throwIO return archiveResult
646− hash <- getNixSha256ForUriUnpacked archiveUri
647− return $ ThunkPtr
648− { _thunkPtr_rev = ThunkRev
649− { _thunkRev_commit = commitNameToRef commit
650− , _thunkRev_nixSha256 = hash
938+
939+ -- loosely by https://stackoverflow.com/questions/7773939/show-git-ahead-and-behind-info-for-all-branches-including-remotes
940+ stats <- ifor headUpstream $ \branch (upstream, _remote) -> do
941+ (stat :: [Text]) <- T.lines <$> readGitProcess thunkDir
942+ [ "rev-list", "--left-right"
943+ , T.unpack branch <> "..." <> T.unpack upstream
944+ ]
945+ let ahead = length $ [ () | Just ('<', _) <- T.uncons <$> stat ]
946+ behind = length $ [ () | Just ('>', _) <- T.uncons <$> stat ]
947+ pure (upstream, (ahead, behind))
948+
949+ -- Those branches which have commits ahead of, i.e. not on, the upstream
950+ -- branch. Purely being behind is fine.
951+ let nonGood = Map.filter ((/= 0) . fst . snd) stats
952+
953+ when (not $ Map.null nonGood) $ failWith $ T.unlines $
954+ [ "thunk pack: Certain branches in the thunk have commits not yet pushed upstream:"
955+ , ""
956+ ] ++
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]) ++
959+ [ ""
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.)"
962+ ]
963+
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."
967+
968+ let remote = maybe "origin" snd $ flip Map.lookup headUpstream =<< mCurrentBranch
969+
970+ [remoteUri'] <- fmap T.lines $ readGitProcess thunkDir
971+ [ "config"
972+ , "--get"
973+ , "remote." <> T.unpack remote <> ".url"
974+ ]
975+
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
980+
981+-- | Get the latest revision available from the given source
982+getLatestRev :: MonadObelisk m => ThunkSource -> m ThunkRev
983+getLatestRev os = do
984+ let gitS = thunkSourceToGitSource os
985+ (_, commit) <- gitGetCommitBranch (_gitSource_url gitS) (untagName <$> _gitSource_branch gitS)
986+ case os of
987+ ThunkSource_GitHub s -> githubThunkRev s commit
988+ ThunkSource_Git s -> gitThunkRev s commit
989+
990+-- | Convert a URI to a thunk
991+--
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
1004+ case rev of
1005+ Right r -> pure (ThunkSource_GitHub s, r)
1006+ Left e -> do
1007+ putLog Warning "\
1008+\Failed to fetch archive from GitHub. This is probably a private repo. \
1009+\Falling back on normal fetchgit. Original failure:"
1010+ errorToWarning e
1011+ let s' = forgetGithub True s
1012+ (,) (ThunkSource_Git s') <$> gitThunkRev s' commit
1013+ ThunkSource_Git s -> (,) (ThunkSource_Git s) <$> gitThunkRev s commit
1014+ pure $ ThunkPtr
1015+ { _thunkPtr_rev = rev
1016+ , _thunkPtr_source = src
1017+ }
1018+
1019+-- | N.B. Cannot infer all fields.
1020+--
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
1028+ , case scheme of
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
6511033 }
652− , _thunkPtr_source = ThunkSource_GitHub $ GitHubSource
653− { _gitHubSource_owner = owner
654− , _gitHubSource_repo = repo
655− , _gitHubSource_branch = branch
656− , _gitHubSource_private = repoIsPrivate
1034+ s -> s `L.elem` [ "git", "https", "http" ] -- "http:" just redirects to "https:"
1035+ && URI.unRText (URI.authHost uriAuth) == "github.com"
1036+ , Just (_, owner :| [repoish]) <- URI.uriPath u
1037+ = \mbranch -> do
1038+ isPrivate <- getIsPrivate
1039+ pure $ ThunkSource_GitHub $ GitHubSource
1040+ { _gitHubSource_owner = N $ URI.unRText owner
1041+ , _gitHubSource_repo = N $ let
1042+ repoish' = URI.unRText repoish
1043+ in fromMaybe repoish' $ T.stripSuffix ".git" repoish'
1044+ , _gitHubSource_branch = N <$> mbranch
1045+ , _gitHubSource_private = isPrivate
6571046 }
1047+
1048+ | otherwise = \mbranch -> do
1049+ isPrivate <- getIsPrivate
1050+ pure $ ThunkSource_Git $ GitSource
1051+ { _gitSource_url = GitUri u
1052+ , _gitSource_branch = N <$> mbranch
1053+ , _gitSource_fetchSubmodules = False -- TODO: How do we determine if this should be true?
1054+ , _gitSource_private = isPrivate
1055+ }
1056+ where
1057+ getIsPrivate = maybe (guessGitRepoIsPrivate $ GitUri u) pure mPrivate
1058+
1059+guessGitRepoIsPrivate :: MonadObelisk m => GitUri -> m Bool
1060+guessGitRepoIsPrivate uri = flip fix urisToTry $ \loop -> \case
1061+ [] -> pure True
1062+ uriAttempt:xs -> do
1063+ result <- readCreateProcessWithExitCode $
1064+ isolateGitProc $
1065+ gitProcNoRepo
1066+ [ "ls-remote"
1067+ , "--quiet"
1068+ , "--exit-code"
1069+ , "--symref"
1070+ , T.unpack $ gitUriToText uriAttempt
1071+ ]
1072+ case result of
1073+ (ExitSuccess, _, _) -> pure False -- Must be a public repo
1074+ _ -> loop xs
1075+ where
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
6581083 }
659− gitThunkPtr u _commit' _branch' = do
660− case uriScheme u of
661− "https:" -> return ()
662− "git:" -> return ()
663− _ -> fail "thunk pack: obelisk currently only supports https and git protocols for non-GitHub remotes"
664− $notImplemented
665− parseSshShorthand uri' = do
666− -- This is what git does to check that the remote
667− -- is not a local file path when parsing shorthand.
668− -- Last referenced from here:
669− -- https://github.com/git/git/blob/95ec6b1b3393eb6e26da40c565520a8db9796e9f/connect.c#L712
670− let uri = T.pack uri'
671− (authAndHostname, colonAndPath) = T.break (== ':') uri
672− properUri = "ssh://" <> authAndHostname <> "/" <> T.drop 1 colonAndPath
673− -- Shorthand is valid iff a colon is present and it occurs before the first slash
674− -- This check is used to disambiguate a filepath containing a colon from shorthand
675− guard $ isNothing (T.findIndex (=='/') authAndHostname)
676− && not (T.null colonAndPath)
677− parseURI $ T.unpack properUri
1084+
1085+-- Funny signature indicates no effects depend on the optional branch name.
1086+githubThunkRev
1087+ :: forall m
1088+ . MonadObelisk m
1089+ => GitHubSource
1090+ -> Text
1091+ -> m ThunkRev
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
1102+ }
1103+ , URI.uriPath = Just ( False
1104+ , owner :| [ repo, fromRight' $ URI.mkPathPiece "archive", revTarball ]
1105+ )
1106+ , URI.uriQuery = []
1107+ , URI.uriFragment = Nothing
1108+ }
1109+ hash <- getNixSha256ForUriUnpacked archiveUri
1110+ putLog Debug $ "Nix sha256 is " <> hash
1111+ return $ ThunkRev
1112+ { _thunkRev_commit = commitNameToRef $ N commit
1113+ , _thunkRev_nixSha256 = hash
1114+ }
1115+ where
1116+ forcePP :: Name entity -> m (URI.RText 'URI.PathPiece)
1117+ forcePP = URI.mkPathPiece . untagName
1118+
1119+gitThunkRev
1120+ :: MonadObelisk m
1121+ => GitSource
1122+ -> Text
1123+ -> m ThunkRev
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
1133+ pure $ ThunkRev
1134+ { _thunkRev_commit = commitNameToRef (N commit)
1135+ , _thunkRev_nixSha256 = hash
1136+ }
1137+
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.
1140+--
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.
1143+
1144+gitGetCommitBranch
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)
1150+ Nothing
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
1155+ pure b
1156+ Just b -> pure 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)
1162+ where
1163+ rethrowE = either failWith pure
1164+ uriMsg = gitUriToText uri
1165+
1166+parseGitUri :: Text -> Maybe GitUri
1167+parseGitUri x = GitUri <$> (parseFileURI x <|> parseAbsoluteURI x <|> parseSshShorthand x)
1168+
1169+parseFileURI :: Text -> Maybe URI.URI
1170+parseFileURI uri = if "/" `T.isPrefixOf` uri then parseAbsoluteURI ("file://" <> uri) else Nothing
1171+
1172+parseAbsoluteURI :: Text -> Maybe URI.URI
1173+parseAbsoluteURI uri = do
1174+ parsedUri <- URI.mkURI uri
1175+ guard $ URI.isPathAbsolute parsedUri
1176+ pure parsedUri
1177+
1178+parseSshShorthand :: Text -> Maybe URI.URI
1179+parseSshShorthand uri = do
1180+ -- This is what git does to check that the remote
1181+ -- is not a local file path when parsing shorthand.
1182+ -- Last referenced from here:
1183+ -- https://github.com/git/git/blob/95ec6b1b3393eb6e26da40c565520a8db9796e9f/connect.c#L712
1184+ let
1185+ (authAndHostname, colonAndPath) = T.break (== ':') uri
1186+ properUri = "ssh://" <> authAndHostname <> "/" <> T.drop 1 colonAndPath
1187+ -- Shorthand is valid iff a colon is present and it occurs before the first slash
1188+ -- This check is used to disambiguate a filepath containing a colon from shorthand
1189+ guard $ isNothing (T.findIndex (=='/') authAndHostname)
1190+ && not (T.null colonAndPath)
1191+ URI.mkURI properUri