File: Generate.hs

package info (click to toggle)
haskell-filepath-bytestring 1.4.2.1.6-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 216 kB
  • sloc: haskell: 1,270; makefile: 6
file content (174 lines) | stat: -rwxr-xr-x 6,280 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
{-# LANGUAGE RecordWildCards, ViewPatterns #-}

module Generate(main) where

import Control.Exception
import Control.Monad
import Data.Char
import Data.List
import System.Directory
import System.IO

equivtests :: [(Int, String)]
equivtests =
        [ (0, "isPathSeparator")
        , (0, "isSearchPathSeparator")
        , (0, "isExtSeparator")
        , (1, "splitExtension")
        , (1, "takeExtension")
        , (2, "replaceExtension")
        , (1, "dropExtension")
        , (2, "addExtension")
        , (1, "hasExtension")
        , (1, "splitExtensions")
        , (1, "dropExtensions")
        , (1, "takeExtensions")
        , (2, "replaceExtensions")
        , (2, "isExtensionOf")
        , (2, "stripExtension")
        , (1, "splitFileName")
        , (1, "takeFileName")
        , (2, "replaceFileName")
        , (1, "dropFileName")
        , (1, "takeBaseName")
        , (2, "replaceBaseName")
        , (1, "takeDirectory")
        , (2, "replaceDirectory")
        , (2, "combine")
        , (1, "splitPath")
        , (3, "joinPath")
        , (1, "splitDirectories")
        , (1, "splitDrive")
        , (2, "joinDrive")
        , (1, "takeDrive")
        , (1, "hasDrive")
        , (1, "dropDrive")
        , (1, "isDrive")
        , (1, "hasTrailingPathSeparator")
        , (1, "addTrailingPathSeparator")
        , (1, "dropTrailingPathSeparator")
        ]

main :: IO ()
main = do
    src <- readFile "System/FilePath/Internal.hs"
    let tests = map renderTest $ concatMap parseTest $ lines src
    writeFileBinaryChanged "tests/TestGen.hs" $ unlines $
        ["-- GENERATED CODE: See ../Generate.hs"
        ,"{-# LANGUAGE OverloadedStrings #-}"
        ,"module TestGen(tests) where"
        ,"import TestUtil"
        ,"import Data.Char"
        ,"import qualified System.FilePath.Windows.ByteString as W"
        ,"import qualified System.FilePath.Posix.ByteString as P"
        ,"import Data.ByteString (isPrefixOf, isSuffixOf, null, any)"
        ,"import Prelude hiding (isPrefixOf, isSuffixOf, null, any)"
        --,"{-# ANN module \"HLint: ignore\" #-}"
        ,"tests :: [(String, Property)]"
        ,"tests ="] ++
        ["    " ++ c ++ "(" ++ show t1 ++ ", " ++ t2 ++ ")" | (c,(t1,t2)) <- zip ("[":repeat ",") tests] ++
        ["    ]"]

    let mkequivs porw l = ["    " ++ c ++ "(" ++ show ("equiv " ++ porw ++ "." ++ t2) ++ ", equiv_" ++ show t1 ++ " Our" ++ porw ++ "." ++ t2 ++ " Their" ++ porw ++ "." ++ t2 ++ ")" | (c,(t1,t2)) <- l]
    writeFileBinaryChanged "tests/TestEquiv.hs" $ unlines $
        ["-- GENERATED CODE: See ../Generate.hs"
        ,"module TestEquiv(equivtests) where"
        ,"import TestUtil"
        ,"import System.FilePath.ByteString (RawFilePath)"
        ,"import qualified System.FilePath.Windows.ByteString as OurWindows"
        ,"import qualified System.FilePath.Windows as TheirWindows"
        ,"import qualified System.FilePath.Posix.ByteString as OurPosix"
        ,"import qualified System.FilePath.Posix as TheirPosix"
        ,"equivtests :: [(String, Property)]"
        ,"equivtests ="] ++
        mkequivs "Posix" (zip ("[":repeat ",") equivtests) ++
        mkequivs "Windows" (zip (repeat ",") equivtests) ++
        ["    ]"]

data PW = P | W deriving Show -- Posix or Windows
data Test = Test
    {testPlatform :: PW
    ,testVars :: [(String,String)]   -- generator constructor, variable
    ,testBody :: [String]
    }


parseTest :: String -> [Test]
parseTest (stripPrefix "-- > " -> Just x) = platform $ toLexemes x
    where
        platform ("untested":x) = []
        platform ("Windows":":":x) = [valid W x]
        platform ("Posix"  :":":x) = [valid P x]
        platform x                 = [valid P x, valid W x]

        valid p ("Valid":x) = free p a $ drop 1 b
            where (a,b) = break (== "=>") x
        valid p x = free p [] x

        free p val x = Test p [(ctor v, v) | v <- vars] x
            where vars = nub $ sort [v | v@[c] <- x, isAlpha c]
                  ctor v | v < "x" = ""
                         | v `elem` val = "QFilePathValid" ++ show p
                         | otherwise = "QFilePath"
parseTest _ = []


toLexemes :: String -> [String]
toLexemes x = case lex x of
    [("","")] -> []
    [(x,y)] -> x : toLexemes y
    y -> error $ "Generate.toLexemes, " ++ show x ++ " -> " ++ show y


fromLexemes :: [String] -> String
fromLexemes = unwords . f
    where
        f ("`":x:"`":xs) = ("`" ++ x ++ "`") : f xs
        f (x:y:xs) | x `elem` ["[","("] || y `elem` [",",")","]"] = f $ (x ++ y) : xs
        f (x:xs) = x : f xs
        f [] = []


renderTest :: Test -> (String, String)
renderTest Test{..} = (body, code)
    where
        code = "property $ " ++ if null testVars then body else "\\" ++ unwords vars ++ " -> " ++ convvars body
        vars = [if null ctor then v else "(" ++ ctor ++ " " ++ ('v':v) ++ ")" | (ctor,v) <- testVars]

        convvars = convvars' $ map snd $ filter (not . null . fst) testVars
        convvars' [] b = b
        convvars' (v:vs) b = convvars' vs $
                "let " ++ v ++ " = toRawFilePath v" ++ v ++ " in " ++ b

        body = fromLexemes $ map (qualify testPlatform) testBody


qualify :: PW -> String -> String
qualify pw str
    | str `elem` fpops || (all isAlpha str && length str > 1 && str `notElem` prelude) = show pw ++ "." ++ str
    | otherwise = str
    where
        prelude = ["elem","uncurry","snd","fst","not","null","if","then","else"
                  ,"True","False","Just","Nothing","fromJust","concat","isPrefixOf","isSuffixOf","any"
                  ,"fromIntegral","ord","mempty","mconcat"]
        fpops = ["</>","<.>","-<.>"]


---------------------------------------------------------------------
-- UTILITIES

writeFileBinary :: FilePath -> String -> IO ()
writeFileBinary file x = withBinaryFile file WriteMode $ \h -> hPutStr h x

readFileBinary' :: FilePath -> IO String
readFileBinary' file = withBinaryFile file ReadMode $ \h -> do
    s <- hGetContents h
    evaluate $ length s
    return s

writeFileBinaryChanged :: FilePath -> String -> IO ()
writeFileBinaryChanged file x = do
    b <- doesFileExist file
    old <- if b then fmap Just $ readFileBinary' file else return Nothing
    when (Just x /= old) $
        writeFileBinary file x