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|
{- Checks system configuration and generates SysConfig.hs. -}
import System.IO
import System.Cmd
import System.Exit
import System.Directory
type ConfigKey = String
data ConfigValue = BoolConfig Bool | StringConfig String
data Config = Config ConfigKey ConfigValue
type Test = IO Config
type TestName = String
data TestCase = TestCase TestName Test
instance Show Config where
show (Config key value) = unlines [
key ++ " :: " ++ valuetype value
, key ++ " = " ++ showvalue value
]
where
valuetype (BoolConfig _) = "Bool"
valuetype (StringConfig _) = "String"
showvalue (BoolConfig b) = show b
showvalue (StringConfig s) = show s
tests :: [TestCase]
tests = [
TestCase "cp -a" $ testCp "cp_a" "-a"
, TestCase "cp -p" $ testCp "cp_p" "-p"
, TestCase "cp --reflink=auto" $ testCp "cp_reflink_auto" "--reflink=auto"
, TestCase "uuid" $ selectCmd "uuid" ["uuid", "uuidgen"]
, TestCase "xargs -0" $ requireCmd "xargs_0" "xargs -0" "xargs -0 </dev/null"
, TestCase "rsync" $ requireCmd "rsync" "rsync" "rsync --version >/dev/null"
]
tmpDir :: String
tmpDir = "tmp"
testFile :: String
testFile = tmpDir ++ "/testfile"
requireCmd :: ConfigKey -> String -> String -> Test
requireCmd k c cmdline = do
ret <- testCmd k cmdline
handle ret
where
handle r@(Config _ (BoolConfig True)) = return r
handle r = do
testEnd r
error $ "** the " ++ c ++ " command is required to use git-annex"
testCp :: ConfigKey -> String -> Test
testCp k option = testCmd k $
"cp " ++ option ++ " " ++ testFile ++ " " ++ testFile ++ ".new"
testCmd :: ConfigKey -> String -> Test
testCmd k c = do
ret <- system $ quiet c
return $ Config k (BoolConfig $ ret == ExitSuccess)
selectCmd :: ConfigKey -> [String] -> Test
selectCmd k cmds = search cmds
where
search [] = do
testEnd $ Config k (BoolConfig False)
error $ "* need one of these commands, but none are available: " ++ show cmds
search (c:cs) = do
ret <- system $ quiet c
if (ret == ExitSuccess)
then return $ Config k (StringConfig c)
else search cs
quiet :: String -> String
quiet s = s ++ " >/dev/null 2>&1"
testStart :: TestName -> IO ()
testStart s = do
putStr $ " checking " ++ s ++ "..."
hFlush stdout
testEnd :: Config -> IO ()
testEnd (Config _ (BoolConfig True)) = putStrLn $ " yes"
testEnd (Config _ (BoolConfig False)) = putStrLn $ " no"
testEnd (Config _ (StringConfig s)) = putStrLn $ " " ++ s
writeSysConfig :: [Config] -> IO ()
writeSysConfig config = writeFile "SysConfig.hs" body
where
body = unlines $ header ++ map show config ++ footer
header = [
"{- Automatically generated by configure. -}"
, "module SysConfig where"
, ""
]
footer = []
runTests :: [TestCase] -> IO [Config]
runTests [] = return []
runTests ((TestCase tname t):ts) = do
testStart tname
c <- t
testEnd c
rest <- runTests ts
return $ c:rest
setup :: IO ()
setup = do
createDirectoryIfMissing True tmpDir
writeFile testFile "test file contents"
cleanup :: IO ()
cleanup = do
removeDirectoryRecursive tmpDir
main :: IO ()
main = do
setup
config <- runTests tests
writeSysConfig config
cleanup
|
