String -> [String] -> String

showCommandForUser :: FilePath -> [String] -> String

Given a program p and arguments args, showCommandForUser p args returns a string suitable for pasting into sh (on POSIX OSs) or cmd.exe (on Windows).

intercalate :: [a] -> [[a]] -> [a]

base Data.List

intercalate xs xss is equivalent to (concat (intersperse xs xss)). It inserts the list xs in between the lists in xss and concatenates the result.

(<.>) :: FilePath -> String -> FilePath

filepath System.FilePath.Windows, filepath System.FilePath.Posix

Alias to addExtension, for people who like that sort of thing.

addExtension :: FilePath -> String -> FilePath

filepath System.FilePath.Windows, filepath System.FilePath.Posix

Add an extension, even if there is already one there. E.g. addExtension "foo.txt" "bat" -> "foo.txt.bat". > addExtension "file.txt" "bib" == "file.txt.bib" > addExtension "file." ".bib" == "file..bib" > addExtension "file" ".bib" == "file.bib" > addExtension "/" "x" == "/.x" > Valid x => takeFileName (addExtension (addTrailingPathSeparator x) "ext") == ".ext" > Windows: addExtension "\\\\share" ".txt" == "\\\\share\\.txt"

replaceBaseName :: FilePath -> String -> FilePath

filepath System.FilePath.Windows, filepath System.FilePath.Posix

Set the base name. > replaceBaseName "file/test.txt" "bob" == "file/bob.txt" > replaceBaseName "fred" "bill" == "bill" > replaceBaseName "/dave/fred/bob.gz.tar" "new" == "/dave/fred/new.tar" > Valid x => replaceBaseName x (takeBaseName x) == x

replaceDirectory :: FilePath -> String -> FilePath

filepath System.FilePath.Windows, filepath System.FilePath.Posix

Set the directory, keeping the filename the same. > Valid x => replaceDirectory x (takeDirectory x) `equalFilePath` x

replaceExtension :: FilePath -> String -> FilePath

filepath System.FilePath.Windows, filepath System.FilePath.Posix

Set the extension of a file, overwriting one if already present. > replaceExtension "file.txt" ".bob" == "file.bob" > replaceExtension "file.txt" "bob" == "file.bob" > replaceExtension "file" ".bob" == "file.bob" > replaceExtension "file.txt" "" == "file" > replaceExtension "file.fred.bob" "txt" == "file.fred.txt"

replaceFileName :: FilePath -> String -> FilePath

filepath System.FilePath.Windows, filepath System.FilePath.Posix

Set the filename. > Valid x => replaceFileName x (takeFileName x) == x

(</>) :: FilePath -> FilePath -> FilePath

filepath System.FilePath.Windows, filepath System.FilePath.Posix

A nice alias for combine.

combine :: FilePath -> FilePath -> FilePath

filepath System.FilePath.Windows, filepath System.FilePath.Posix

Combine two paths, if the second path isAbsolute, then it returns the second. > Valid x => combine (takeDirectory x) (takeFileName x) `equalFilePath` x > Posix: combine "/" "test" == "/test" > Posix: combine "home" "bob" == "home/bob" > Windows: combine "home" "bob" == "home\\bob" > Windows: combine "home" "/bob" == "/bob"

joinDrive :: FilePath -> FilePath -> FilePath

filepath System.FilePath.Windows, filepath System.FilePath.Posix

Join a drive and the rest of the path. > uncurry joinDrive (splitDrive x) == x > Windows: joinDrive "C:" "foo" == "C:foo" > Windows: joinDrive "C:\\" "bar" == "C:\\bar" > Windows: joinDrive "\\\\share" "foo" == "\\\\share\\foo" > Windows: joinDrive "/:" "foo" == "/:\\foo"

makeRelative :: FilePath -> FilePath -> FilePath

filepath System.FilePath.Windows, filepath System.FilePath.Posix

Contract a filename, based on a relative path. There is no corresponding makeAbsolute function, instead use System.Directory.canonicalizePath which has the same effect. > Valid y => equalFilePath x y || (isRelative x && makeRelative y x == x) || equalFilePath (y </> makeRelative y x) x > makeRelative x x == "." > null y || equalFilePath (makeRelative x (x </> y)) y || null (takeFileName x) > Windows: makeRelative "C:\\Home" "c:\\home\\bob" == "bob" > Windows: makeRelative "C:\\Home" "c:/home/bob" == "bob" > Windows: makeRelative "C:\\Home" "D:\\Home\\Bob" == "D:\\Home\\Bob" > Windows: makeRelative "C:\\Home" "C:Home\\Bob" == "C:Home\\Bob" > Windows: makeRelative "/Home" "/home/bob" == "bob" > Posix: makeRelative "/Home" "/home/bob" == "/home/bob" > Posix: makeRelative "/home/" "/home/bob/foo/bar" == "bob/foo/bar" > Posix: makeRelative "/fred" "bob" == "bob" > Posix: makeRelative "/file/test" "/file/test/fred" == "fred" > Posix: makeRelative "/file/test" "/file/test/fred/" == "fred/" > Posix: makeRelative "some/path" "some/path/a/b/c" == "a/b/c"

readProcess :: FilePath -> [String] -> String -> IO String

process System.Process

readProcess forks an external process, reads its standard output strictly, blocking until the process terminates, and returns the output string. Output is returned strictly, so this is not suitable for interactive applications. This function throws an IOError if the process ExitCode is anything other than ExitSuccess. Users of this function should compile with -threaded if they want other Haskell threads to keep running while waiting on the result of readProcess. > > readProcess "date" [] [] > "Thu Feb 7 10:03:39 PST 2008\n" The arguments are: * The command to run, which must be in the $PATH, or an absolute path * A list of separate command line arguments to the program * A string to pass on the standard input to the program.

subRegex :: Regex -> String -> String -> String

regex-compat Text.Regex

Replaces every occurance of the given regexp with the replacement string. In the replacement string, "\1" refers to the first substring; "\2" to the second, etc; and "\0" to the entire match. "\\\\" will insert a literal backslash. This does not advance if the regex matches an empty string. This misfeature is here to match the behavior of the the original Text.Regex API.

getVarWithDefault :: MonadCGI m => String -> String -> m String

cgi Network.CGI

findCookie :: String -> String -> Maybe String

cgi Network.CGI.Cookie

Get the value of a cookie from a string on the form "cookieName1=cookieValue1;...;cookieName2=cookieValue2". This is the format of the Cookie HTTP header.

getEnvDefault :: String -> String -> IO String

unix System.Posix.Env

getEnvDefault is a wrapper around getEnv programmer can specify a fallback if the variable is not found in the environment.

(++) :: [a] -> [a] -> [a]

base Prelude, base Data.List

Append two lists, i.e., > [x1, ..., xm] ++ [y1, ..., yn] == [x1, ..., xm, y1, ..., yn] > [x1, ..., xm] ++ [y1, ...] == [x1, ..., xm, y1, ...] If the first list is not finite, the result is the first list.

postRequestWithBody :: String -> String -> String -> Request_String

HTTP Network.HTTP

postRequestWithBody urlString typ body is convenience constructor for POST Requests. It constructs a request and sets the body as well as the Content-Type and Content-Length headers. The contents of the body are forced to calculate the value for the Content-Length header. If urlString isn't a syntactically valid URL, the function raises an error.

deleteFirstsBy :: (a -> a -> Bool) -> [a] -> [a] -> [a]

base Data.List

The deleteFirstsBy function takes a predicate and two lists and returns the first list with the first occurrence of each element of the second list removed.

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