28b9588...master · typeable/file-embed

git.iko.soy/typeable/file-embed

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.github/workflows/tests.ymlnew file+32

since splitsnapshots

unifiedsplit

@@ -0,0 +1,32 @@

1+name: Tests

3+on: [pull_request, push]

5+jobs:

6+ build:

7+ name: CI

8+ runs-on: ${{ matrix.os }}

9+ strategy:

10+ fail-fast: false

11+ matrix:

12+ os: [ubuntu-latest, macos-latest, windows-latest]

13+ resolver: [nightly, lts-15, lts-14, lts-12, lts-11, lts-9]

14+

15+ steps:

16+ - name: Clone project

17+ uses: actions/checkout@v2

18+

19+ - name: Cache dependencies

20+ uses: actions/cache@v1

21+ with:

22+ path: ~/.stack

23+ key: ${{ runner.os }}-${{ matrix.resolver }}-${{ hashFiles('stack.yaml') }}

24+ restore-keys: |

25+ ${{ runner.os }}-${{ matrix.resolver }}-

26+

27+ - name: Build and run tests

28+ shell: bash

29+ run: |

30+ set -ex

31+ stack upgrade || curl -sSL https://get.haskellstack.org/ | sh -s - -f

32+ stack test --fast --no-terminal --resolver=${{ matrix.resolver }}

.gitignore+1

@@ -1,3 +1,4 @@

1dist

2*.swp

3.stack-work

4+/tarballs/

.travis.ymldeleted−146

@@ -1,146 +0,0 @@

1−# Use new container infrastructure to enable caching

2−sudo: false

3−

4−# Choose a lightweight base image; we provide our own build tools.

5−language: c

6−

7−# Caching so the next build will be fast too.

8−cache:

9− directories:

10− - $HOME/.ghc

11− - $HOME/.cabal

12− - $HOME/.stack

13−

14−# The different configurations we want to test. We have BUILD=cabal which uses

15−# cabal-install, and BUILD=stack which uses Stack. More documentation on each

16−# of those below.

17−#

18−# We set the compiler values here to tell Travis to use a different

19−# cache file per set of arguments.

20−#

21−# If you need to have different apt packages for each combination in the

22−# matrix, you can use a line such as:

23−# addons: {apt: {packages: [libfcgi-dev,libgmp-dev]}}

24−matrix:

25− include:

26− # We grab the appropriate GHC and cabal-install versions from hvr's PPA. See:

27− # https://github.com/hvr/multi-ghc-travis

28− - env: BUILD=cabal GHCVER=6.12.3 CABALVER=1.16

29− compiler: ": #GHC 6.12.3"

30− addons: {apt: {packages: [cabal-install-1.16,ghc-6.12.3], sources: [hvr-ghc]}}

31− - env: BUILD=cabal GHCVER=7.0.4 CABALVER=1.16

32− compiler: ": #GHC 7.0.4"

33− addons: {apt: {packages: [cabal-install-1.16,ghc-7.0.4], sources: [hvr-ghc]}}

34− - env: BUILD=cabal GHCVER=7.2.2 CABALVER=1.16

35− compiler: ": #GHC 7.2.2"

36− addons: {apt: {packages: [cabal-install-1.16,ghc-7.2.2], sources: [hvr-ghc]}}

37− - env: BUILD=cabal GHCVER=7.4.2 CABALVER=1.16

38− compiler: ": #GHC 7.4.2"

39− addons: {apt: {packages: [cabal-install-1.16,ghc-7.4.2], sources: [hvr-ghc]}}

40− - env: BUILD=cabal GHCVER=7.6.3 CABALVER=1.16

41− compiler: ": #GHC 7.6.3"

42− addons: {apt: {packages: [cabal-install-1.16,ghc-7.6.3], sources: [hvr-ghc]}}

43− - env: BUILD=cabal GHCVER=7.8.4 CABALVER=1.18

44− compiler: ": #GHC 7.8.4"

45− addons: {apt: {packages: [cabal-install-1.18,ghc-7.8.4], sources: [hvr-ghc]}}

46− - env: BUILD=cabal GHCVER=7.10.3 CABALVER=1.22

47− compiler: ": #GHC 7.10.3"

48− addons: {apt: {packages: [cabal-install-1.22,ghc-7.10.3], sources: [hvr-ghc]}}

49−

50− # Build with the newest GHC and cabal-install. This is an accepted failure,

51− # see below.

52− - env: BUILD=cabal GHCVER=head CABALVER=head

53− compiler: ": #GHC HEAD"

54− addons: {apt: {packages: [cabal-install-head,ghc-head], sources: [hvr-ghc]}}

55−

56− # The Stack builds. We can pass in arbitrary Stack arguments via the ARGS

57− # variable, such as using --stack-yaml to point to a different file.

58− - env: BUILD=stack ARGS="--resolver lts-2"

59− compiler: ": #stack 7.8.4"

60− addons: {apt: {packages: [ghc-7.8.4], sources: [hvr-ghc]}}

61−

62− - env: BUILD=stack ARGS="--resolver lts-3"

63− compiler: ": #stack 7.10.2"

64− addons: {apt: {packages: [ghc-7.10.2], sources: [hvr-ghc]}}

65−

66− - env: BUILD=stack ARGS="--resolver lts-5"

67− compiler: ": #stack 7.10.3"

68− addons: {apt: {packages: [ghc-7.10.3], sources: [hvr-ghc]}}

69−

70− # Nightly builds are allowed to fail

71− - env: BUILD=stack ARGS="--resolver nightly"

72− compiler: ": #stack nightly"

73− addons: {apt: {packages: [libgmp-dev]}}

74−

75− # Build on OS X in addition to Linux

76− - env: BUILD=stack ARGS="--resolver lts-2"

77− compiler: ": #stack 7.8.4 osx"

78− os: osx

79−

80− - env: BUILD=stack ARGS="--resolver lts-3"

81− compiler: ": #stack 7.10.2 osx"

82− os: osx

83−

84− - env: BUILD=stack ARGS="--resolver lts-5"

85− compiler: ": #stack 7.10.3 osx"

86− os: osx

87−

88− - env: BUILD=stack ARGS="--resolver nightly"

89− compiler: ": #stack nightly osx"

90− os: osx

91−

92− allow_failures:

93− - env: BUILD=cabal GHCVER=head CABALVER=head

94− - env: BUILD=stack ARGS="--resolver nightly"

95−

96−before_install:

97−# Using compiler above sets CC to an invalid value, so unset it

98−- unset CC

99−

100−# We want to always allow newer versions of packages when building on GHC HEAD

101−- CABALARGS=""

102−- if [ "x$GHCVER" = "xhead" ]; then CABALARGS=--allow-newer; fi

103−

104−# Download and unpack the stack executable

105−- export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$HOME/.local/bin:$PATH

106−- mkdir -p ~/.local/bin

107−- |

108− if [ `uname` = "Darwin" ]

109− then

110− curl --insecure -L https://www.stackage.org/stack/osx-x86_64 | tar xz --strip-components=1 --include '*/stack' -C ~/.local/bin

111− else

112− curl -L https://www.stackage.org/stack/linux-x86_64 | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'

113− fi

114−

115−install:

116−- echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"

117−- if [ -f configure.ac ]; then autoreconf -i; fi

118−- |

119− case "$BUILD" in

120− stack)

121− stack --no-terminal --install-ghc $ARGS test --only-dependencies

122− ;;

123− cabal)

124− cabal --version

125− travis_retry cabal update

126− cabal install --only-dependencies --enable-tests --enable-benchmarks --force-reinstalls --ghc-options=-O0 --reorder-goals --max-backjumps=-1 $CABALARGS

127− ;;

128− esac

129−

130−script:

131−- |

132− case "$BUILD" in

133− stack)

134− stack --no-terminal $ARGS test --haddock --no-haddock-deps

135− ;;

136− cabal)

137− cabal configure --enable-tests --enable-benchmarks -v2 --ghc-options="-O0 -Werror"

138− cabal build

139− cabal check || [ "$CABALVER" == "1.16" ]

140− cabal test

141− cabal sdist

142− cabal copy

143− SRC_TGZ=$(cabal info . | awk '{print $2;exit}').tar.gz && \

144− (cd dist && cabal install --force-reinstalls "$SRC_TGZ")

145− ;;

146− esac

ChangeLog.md+38

@@ -1,3 +1,41 @@

1+# ChangeLog for file-embed

3+## 0.0.15.0

5+* Add `makeRelativeToLocationPredicate`

7+## 0.0.14.0

9+* Add `embedFileIfExists`

10+

11+## 0.0.13.0

12+

13+* Ensure that directory listings are returned in sorted order for reproducibility [yesodweb/yesod#1684](https://github.com/yesodweb/yesod/issues/1684)

14+

15+## 0.0.12.0

16+

17+* Use the `Bytes` literal on newer GHCs to reduce memory usage during compilation [#36](https://github.com/snoyberg/file-embed/pull/36)

18+

19+## 0.0.11.2

20+

21+* Haddock markup fix

22+

23+## 0.0.11.1

24+

25+* Support GHC 8.10

26+

27+## 0.0.11

28+

29+* embedDirListing [#26](https://github.com/snoyberg/file-embed/pull/26)

30+

31+## 0.0.10.1

32+

33+* Minor doc improvements

34+

35+## 0.0.10

36+

37+* `makeRelativeToProject`

38+

1## 0.0.9

39## 0.0.9

3* embedStringFile [#14](https://github.com/snoyberg/file-embed/pull/14)

41* embedStringFile [#14](https://github.com/snoyberg/file-embed/pull/14)

Data/FileEmbed.hs+116−13

@@ -19,8 +19,10 @@

19module Data.FileEmbed

20 ( -- * Embed at compile time

21 embedFile

22+ , embedFileIfExists

22 , embedOneFileOf

23 , embedOneFileOf

23 , embedDir

24 , embedDir

25+ , embedDirListing

24 , getDir

26 , getDir

25 -- * Embed as a IsString

27 -- * Embed as a IsString

26 , embedStringFile

28 , embedStringFile

@@ -35,6 +37,9 @@ module Data.FileEmbed

35 , injectFile

37 , injectFile

36 , injectWith

38 , injectWith

37 , injectFileWith

39 , injectFileWith

40+ -- * Relative path manipulation

41+ , makeRelativeToProject

42+ , makeRelativeToLocationPredicate

38 -- * Internal

43 -- * Internal

39 , stringToBs

44 , stringToBs

40 , bsToExp

45 , bsToExp

@@ -43,30 +48,34 @@ module Data.FileEmbed

44import Language.Haskell.TH.Syntax

49import Language.Haskell.TH.Syntax

45 ( Exp (AppE, ListE, LitE, TupE, SigE, VarE)

50 ( Exp (AppE, ListE, LitE, TupE, SigE, VarE)

46−#if MIN_VERSION_template_haskell(2,5,0)

51+ , Lit (..)

47− , Lit (StringL, StringPrimL, IntegerL)

48−#else

49− , Lit (StringL, IntegerL)

50−#endif

51 , Q

52 , Q

52 , runIO

53 , runIO

54+ , qLocation, loc_filename

53#if MIN_VERSION_template_haskell(2,7,0)

55#if MIN_VERSION_template_haskell(2,7,0)

54 , Quasi(qAddDependentFile)

56 , Quasi(qAddDependentFile)

55#endif

57#endif

56 )

58 )

59+#if MIN_VERSION_template_haskell(2,16,0)

60+import Language.Haskell.TH ( mkBytes, bytesPrimL )

61+import qualified Data.ByteString.Internal as B

62+#endif

57import System.Directory (doesDirectoryExist, doesFileExist,

63import System.Directory (doesDirectoryExist, doesFileExist,

58− getDirectoryContents)

64+ getDirectoryContents, canonicalizePath)

59−import Control.Exception (throw, ErrorCall(..))

65+import Control.Exception (throw, tryJust, ErrorCall(..))

60−import Control.Monad (filterM)

66+import Control.Monad (filterM, guard)

61import qualified Data.ByteString as B

67import qualified Data.ByteString as B

62import qualified Data.ByteString.Char8 as B8

68import qualified Data.ByteString.Char8 as B8

63import Control.Arrow ((&&&), second)

69import Control.Arrow ((&&&), second)

64import Control.Applicative ((<$>))

70import Control.Applicative ((<$>))

65import Data.ByteString.Unsafe (unsafePackAddressLen)

71import Data.ByteString.Unsafe (unsafePackAddressLen)

72+import System.IO.Error (isDoesNotExistError)

66import System.IO.Unsafe (unsafePerformIO)

73import System.IO.Unsafe (unsafePerformIO)

67−import System.FilePath ((</>))

74+import System.FilePath ((</>), takeDirectory, takeExtension)

68import Data.String (fromString)

75import Data.String (fromString)

69import Prelude as P

76import Prelude as P

77+import Data.List (sortBy)

78+import Data.Ord (comparing)

71-- | Embed a single file in your source code.

80-- | Embed a single file in your source code.

72--

81--

@@ -81,13 +90,40 @@ embedFile fp =

81#endif

90#endif

82 (runIO $ B.readFile fp) >>= bsToExp

91 (runIO $ B.readFile fp) >>= bsToExp

93+-- | Maybe embed a single file in your source code depending on whether or not file exists.

94+--

95+-- Warning: When a build is compiled with the file missing, a recompile when the file exists might not trigger an embed of the file.

96+-- You might try to fix this by doing a clean build.

97+--

98+-- > import qualified Data.ByteString

99+-- >

100+-- > maybeMyFile :: Maybe Data.ByteString.ByteString

101+-- > maybeMyFile = $(embedFileIfExists "dirName/fileName")

102+--

103+-- @since 0.0.14.0

104+embedFileIfExists :: FilePath -> Q Exp

105+embedFileIfExists fp = do

106+ mbs <- runIO maybeFile

107+ case mbs of

108+ Nothing -> [| Nothing |]

109+ Just bs -> do

110+#if MIN_VERSION_template_haskell(2,7,0)

111+ qAddDependentFile fp

112+#endif

113+ [| Just $(bsToExp bs) |]

114+ where

115+ maybeFile :: IO (Maybe B.ByteString)

116+ maybeFile =

117+ either (const Nothing) Just <$>

118+ tryJust (guard . isDoesNotExistError) (B.readFile fp)

119+

84-- | Embed a single existing file in your source code

120-- | Embed a single existing file in your source code

85-- out of list a list of paths supplied.

121-- out of list a list of paths supplied.

86--

122--

87-- > import qualified Data.ByteString

123-- > import qualified Data.ByteString

88-- >

124-- >

89-- > myFile :: Data.ByteString.ByteString

125-- > myFile :: Data.ByteString.ByteString

90−-- > myFile = $(embedFile' [ "dirName/fileName", "src/dirName/fileName" ])

126+-- > myFile = $(embedOneFileOf [ "dirName/fileName", "src/dirName/fileName" ])

91embedOneFileOf :: [FilePath] -> Q Exp

127embedOneFileOf :: [FilePath] -> Q Exp

92embedOneFileOf ps =

128embedOneFileOf ps =

93 (runIO $ readExistingFile ps) >>= \ ( path, content ) -> do

129 (runIO $ readExistingFile ps) >>= \ ( path, content ) -> do

@@ -115,6 +151,18 @@ embedDir fp = do

115 e <- ListE <$> ((runIO $ fileList fp) >>= mapM (pairToExp fp))

151 e <- ListE <$> ((runIO $ fileList fp) >>= mapM (pairToExp fp))

116 return $ SigE e typ

152 return $ SigE e typ

117

153

154+-- | Embed a directory listing recursively in your source code.

155+--

156+-- > myFiles :: [FilePath]

157+-- > myFiles = $(embedDirListing "dirName")

158+--

159+-- @since 0.0.11

160+embedDirListing :: FilePath -> Q Exp

161+embedDirListing fp = do

162+ typ <- [t| [FilePath] |]

163+ e <- ListE <$> ((runIO $ fmap fst <$> fileList fp) >>= mapM strToExp)

164+ return $ SigE e typ

165+

118-- | Get a directory tree in the IO monad.

166-- | Get a directory tree in the IO monad.

119--

167--

120-- This is the workhorse of 'embedDir'

168-- This is the workhorse of 'embedDir'

@@ -127,7 +175,11 @@ pairToExp _root (path, bs) = do

127 qAddDependentFile $ _root ++ '/' : path

175 qAddDependentFile $ _root ++ '/' : path

128#endif

176#endif

129 exp' <- bsToExp bs

177 exp' <- bsToExp bs

178+ return $! TupE

179+#if MIN_VERSION_template_haskell(2,16,0)

180+ $ map Just

181+#endif

130− return $! TupE [LitE $ StringL path, exp']

182+ [LitE $ StringL path, exp']

131

183

132bsToExp :: B.ByteString -> Q Exp

184bsToExp :: B.ByteString -> Q Exp

133#if MIN_VERSION_template_haskell(2, 5, 0)

185#if MIN_VERSION_template_haskell(2, 5, 0)

@@ -135,7 +187,11 @@ bsToExp bs =

135 return $ VarE 'unsafePerformIO

187 return $ VarE 'unsafePerformIO

136 `AppE` (VarE 'unsafePackAddressLen

188 `AppE` (VarE 'unsafePackAddressLen

137 `AppE` LitE (IntegerL $ fromIntegral $ B8.length bs)

189 `AppE` LitE (IntegerL $ fromIntegral $ B8.length bs)

138−#if MIN_VERSION_template_haskell(2, 8, 0)

190+#if MIN_VERSION_template_haskell(2, 16, 0)

191+ `AppE` LitE (bytesPrimL (

192+ let B.PS ptr off sz = bs

193+ in mkBytes ptr (fromIntegral off) (fromIntegral sz))))

194+#elif MIN_VERSION_template_haskell(2, 8, 0)

139 `AppE` LitE (StringPrimL $ B.unpack bs))

195 `AppE` LitE (StringPrimL $ B.unpack bs))

140#else

196#else

141 `AppE` LitE (StringPrimL $ B8.unpack bs))

197 `AppE` LitE (StringPrimL $ B8.unpack bs))

@@ -210,7 +266,7 @@ fileList' realTop top = do

210 mapM (liftPair2 . second B.readFile)

266 mapM (liftPair2 . second B.readFile)

211 dirs <- filterM (doesDirectoryExist . snd) all' >>=

267 dirs <- filterM (doesDirectoryExist . snd) all' >>=

212 mapM (fileList' realTop . fst)

268 mapM (fileList' realTop . fst)

213− return $ concat $ files : dirs

269+ return $ sortBy (comparing fst) $ concat $ files : dirs

214

270

215liftPair2 :: Monad m => (a, m b) -> m (a, b)

271liftPair2 :: Monad m => (a, m b) -> m (a, b)

216liftPair2 (a, b) = b >>= \b' -> return (a, b')

272liftPair2 (a, b) = b >>= \b' -> return (a, b')

@@ -336,3 +392,50 @@ the magic key. If you know for certain that there will only be one dummy space

336available, you can use the non-@With@ variants.

392available, you can use the non-@With@ variants.

337

393

338-}

394-}

395+

396+-- | Take a relative file path and attach it to the root of the current

397+-- project.

398+--

399+-- The idea here is that, when building with Stack, the build will always be

400+-- executed with a current working directory of the root of the project (where

401+-- your .cabal file is located). However, if you load up multiple projects with

402+-- @stack ghci@, the working directory may be something else entirely.

403+--

404+-- This function looks at the source location of the Haskell file calling it,

405+-- finds the first parent directory with a .cabal file, and uses that as the

406+-- root directory for fixing the relative path.

407+--

408+-- @$(makeRelativeToProject "data/foo.txt" >>= embedFile)@

409+--

410+-- @since 0.0.10

411+makeRelativeToProject :: FilePath -> Q FilePath

412+makeRelativeToProject = makeRelativeToLocationPredicate $ (==) ".cabal" . takeExtension

413+

414+-- | Take a predicate to infer the project root and a relative file path, the given file path is then attached to the inferred project root

415+--

416+-- This function looks at the source location of the Haskell file calling it,

417+-- finds the first parent directory with a file matching the given predicate, and uses that as the

418+-- root directory for fixing the relative path.

419+--

420+-- @$(makeRelativeToLocationPredicate ((==) ".cabal" . takeExtension) "data/foo.txt" >>= embedFile)@

421+--

422+-- @since 0.0.15.0

423+makeRelativeToLocationPredicate :: (FilePath -> Bool) -> FilePath -> Q FilePath

424+makeRelativeToLocationPredicate isTargetFile rel = do

425+ loc <- qLocation

426+ runIO $ do

427+ srcFP <- canonicalizePath $ loc_filename loc

428+ mdir <- findProjectDir srcFP

429+ case mdir of

430+ Nothing -> error $ "Could not find .cabal file for path: " ++ srcFP

431+ Just dir -> return $ dir </> rel

432+ where

433+ findProjectDir x = do

434+ let dir = takeDirectory x

435+ if dir == x

436+ then return Nothing

437+ else do

438+ contents <- getDirectoryContents dir

439+ if any isTargetFile contents

440+ then return (Just dir)

441+ else findProjectDir dir

README.md+2

@@ -1,4 +1,6 @@

1## file-embed

3+![Tests](https://github.com/snoyberg/file-embed/workflows/Tests/badge.svg)

3Use Template Haskell to read a file or all the files in a directory, and turn

5Use Template Haskell to read a file or all the files in a directory, and turn

4them into (path, bytestring) pairs embedded in your haskell code.

6them into (path, bytestring) pairs embedded in your haskell code.

file-embed.cabal+8−5

@@ -1,16 +1,16 @@

1name: file-embed

2−version: 0.0.9.1

2+version: 0.0.15.0

3−license: BSD3

3+license: BSD2

4license-file: LICENSE

5author: Michael Snoyman <michael@snoyman.com>

6maintainer: Michael Snoyman <michael@snoyman.com>

7synopsis: Use Template Haskell to embed file contents directly.

8description: Use Template Haskell to read a file or all the files in a

9 directory, and turn them into (path, bytestring) pairs

10− embedded in your haskell code.

10+ embedded in your Haskell code.

11category: Data

12stability: Stable

13−cabal-version: >= 1.8

13+cabal-version: >= 1.10

14build-type: Simple

15homepage: https://github.com/snoyberg/file-embed

16extra-source-files: test/main.hs, test/sample/foo, test/sample/bar/baz,

@@ -18,7 +18,8 @@ extra-source-files: test/main.hs, test/sample/foo, test/sample/bar/baz,

18 README.md

20library

21+ default-language: Haskell2010

21− build-depends: base >= 4 && < 5

22+ build-depends: base >= 4.9.1 && < 5

22 , bytestring >= 0.9.1.4

23 , bytestring >= 0.9.1.4

23 , directory >= 1.0.0.3

24 , directory >= 1.0.0.3

24 , template-haskell

25 , template-haskell

@@ -27,10 +28,12 @@ library

27 ghc-options: -Wall

28 ghc-options: -Wall

29test-suite test

30test-suite test

31+ default-language: Haskell2010

30 type: exitcode-stdio-1.0

32 type: exitcode-stdio-1.0

31 main-is: main.hs

33 main-is: main.hs

32 hs-source-dirs: test

34 hs-source-dirs: test

33 build-depends: base

35 build-depends: base

36+ , bytestring

34 , file-embed

37 , file-embed

35 , filepath

38 , filepath

stack.yaml+1−5

@@ -1,5 +1 @@

1−flags: {}

2−packages:

3−- '.'

4−extra-deps: []

5−resolver: lts-3.0

1+resolver: lts-14.17

test/main.hs+10−3

@@ -2,6 +2,7 @@

2{-# LANGUAGE OverloadedStrings #-}

4import Control.Monad (unless)

5+import qualified Data.ByteString as B (ByteString, filter)

5import Data.FileEmbed

6import Data.FileEmbed

6import System.FilePath ((</>))

7import System.FilePath ((</>))

@@ -14,8 +15,14 @@ main :: IO ()

14main = do

15main = do

15 let received = $(embedDir "test/sample")

16 let received = $(embedDir "test/sample")

16 received @?=

17 received @?=

17− [ ("foo", "foo\r\n")

18− , ("bar" </> "baz", "baz\r\n")

18+ [ ("bar" </> "baz", "baz\r\n")

19+ , ("foo", "foo\r\n")

19 ]

20 ]

20 let str = $(embedStringFile "test/sample/foo") :: String

21 let str = $(embedStringFile "test/sample/foo") :: String

21− str @?= "foo\r\n"

22+ filter (/= '\r') str @?= "foo\n"

23+

24+ let mbs = $(embedFileIfExists "test/sample/foo")

25+ fmap (B.filter (/= fromIntegral (fromEnum '\r'))) mbs @?= Just "foo\n"

26+

27+ let mbs2 = $(embedFileIfExists "test/sample/foo2") :: Maybe B.ByteString

28+ mbs2 @?= Nothing