Safe Haskell	Safe
Language	Haskell2010

SimpleCmd

Description

Some simple String wrappers of readProcess, readProcessWithExitCode, rawSystem from the Haskell process library.

Simplest is

cmd_ :: String -> [String] -> IO ()

which outputs to stdout. For example:

cmd_ "git" ["clone", url]

Then

cmd :: String -> [String] -> IO String

returns stdout as a String.

There are also cmdBool, cmdMaybe, cmdLines, shell, and others.

Other examples:

grep_ pat file :: IO Bool

sudo c args :: IO ()

Synopsis

cmd :: String -> [String] -> IO String
cmd_ :: String -> [String] -> IO ()
cmdBool :: String -> [String] -> IO Bool
cmdIgnoreErr :: String -> [String] -> String -> IO String
cmdLines :: String -> [String] -> IO [String]
cmdMaybe :: String -> [String] -> IO (Maybe String)
cmdFull :: String -> [String] -> String -> IO (Bool, String, String)
cmdLog :: String -> [String] -> IO ()
cmdlog :: String -> [String] -> IO ()
cmdN :: String -> [String] -> IO ()
cmdQuiet :: String -> [String] -> IO String
cmdSilent :: String -> [String] -> IO ()
cmdStdIn :: String -> [String] -> String -> IO String
cmdStdErr :: String -> [String] -> IO (String, String)
cmdTry_ :: String -> [String] -> IO ()
cmdStderrToStdout :: String -> [String] -> IO (ExitCode, String)
cmdStderrToStdoutIn :: String -> [String] -> String -> IO (Bool, String)
error' :: String -> a
egrep_ :: String -> FilePath -> IO Bool
grep :: String -> FilePath -> IO [String]
grep_ :: String -> FilePath -> IO Bool
ifM :: Monad m => m Bool -> m a -> m a -> m a
logMsg :: String -> IO ()
needProgram :: String -> IO ()
removePrefix :: String -> String -> String
removeStrictPrefix :: String -> String -> String
removeSuffix :: String -> String -> String
shell :: String -> IO String
shell_ :: String -> IO ()
shellBool :: String -> IO Bool
sudo :: String -> [String] -> IO String
sudo_ :: String -> [String] -> IO ()
warning :: String -> IO ()
type PipeCommand = (String, [String])
pipe :: PipeCommand -> PipeCommand -> IO String
pipe_ :: PipeCommand -> PipeCommand -> IO ()
pipeBool :: PipeCommand -> PipeCommand -> IO Bool
pipe3 :: PipeCommand -> PipeCommand -> PipeCommand -> IO String
pipe3_ :: PipeCommand -> PipeCommand -> PipeCommand -> IO ()
pipeFile_ :: FilePath -> PipeCommand -> PipeCommand -> IO ()
whenM :: Monad m => m Bool -> m () -> m ()
(+-+) :: String -> String -> String

Documentation

cmd Source #

Arguments

:: String	command to run
-> [String]	list of arguments
-> IO String	stdout

cmd c args runs a command in a process and returns stdout

cmd_ :: String -> [String] -> IO () Source #

cmd_ c args runs command in a process, output goes to stdout and stderr

cmdBool :: String -> [String] -> IO Bool Source #

cmdBool c args runs a command, and return Boolean status

cmdIgnoreErr :: String -> [String] -> String -> IO String Source #

cmdIgnoreErr c args inp runs a command with input, drops stderr, and return stdout

cmdLines :: String -> [String] -> IO [String] Source #

cmdLines c args runs a command, and returns list of stdout lines

Since: 0.1.1

cmdMaybe :: String -> [String] -> IO (Maybe String) Source #

cmdMaybe c args runs a command, maybe returning output if it succeeds

cmdFull :: String -> [String] -> String -> IO (Bool, String, String) Source #

cmdFull c args inp runs readProcessWithExitCode and converts the ExitCode to Bool Removes the last newline from stdout and stderr (like the other functions)

cmdLog :: String -> [String] -> IO () Source #

cmdLog c args logs a command with a datestamp

Since: 0.1.4

cmdlog :: String -> [String] -> IO () Source #

cmdlog deprecated alias for cmdLog (will be removed in 0.3)

cmdN :: String -> [String] -> IO () Source #

cmdN c args dry-runs a command: prints command to stdout - more used for debugging

cmdQuiet :: String -> [String] -> IO String Source #

cmdQuiet c args runs a command hiding stderr, if it succeeds returns stdout

cmdSilent :: String -> [String] -> IO () Source #

cmdSilent c args runs a command hiding stdout: stderr is only output if it fails.

cmdStdIn :: String -> [String] -> String -> IO String Source #

cmdStdIn c args inp runs a command, passing input string as stdin, and returns stdout

cmdStdErr :: String -> [String] -> IO (String, String) Source #

cmdStdErr c args runs command in a process, returning stdout and stderr

cmdTry_ :: String -> [String] -> IO () Source #

cmdTry_ c args runs the command if available

Since: 0.2.1

cmdStderrToStdout :: String -> [String] -> IO (ExitCode, String) Source #

Redirect stderr to stdout, ie with interleaved output

Since: 0.2.2

cmdStderrToStdoutIn :: String -> [String] -> String -> IO (Bool, String) Source #

Redirect stderr to stdout, ie with interleaved output

Since: 0.2.3

error' :: String -> a Source #

Alias for errorWithoutStackTrace (for base >= 4.9)

Since: 0.1.4

egrep_ :: String -> FilePath -> IO Bool Source #

egrep_ pat file greps extended regexp in file, and returns Boolean status

grep :: String -> FilePath -> IO [String] Source #

grep pat file greps pattern in file, and returns list of matches

@since 0.1.2 (fixed not to error in 0.2.2)

grep_ Source #

Arguments

:: String	pattern
-> FilePath	file
-> IO Bool	result

grep_ pat file greps pattern in file and returns Boolean status

ifM :: Monad m => m Bool -> m a -> m a -> m a #

logMsg :: String -> IO () Source #

logMsg msg outputs message with a timestamp

needProgram :: String -> IO () Source #

Assert program in PATH

needProgram progname

Since: 0.2.1

removePrefix :: String -> String -> String Source #

removePrefix prefix original removes prefix from string if present

removeStrictPrefix :: String -> String -> String Source #

removeStrictPrefix prefix original removes prefix, or fails with error'

removeSuffix :: String -> String -> String Source #

removeSuffix suffix original removes suffix from string if present

shell :: String -> IO String Source #

shell cs runs a command string in a shell, and returns stdout

shell_ :: String -> IO () Source #

shell_ cs runs a command string in a shell, output goes to stdout

shellBool :: String -> IO Bool Source #

shellBool cs runs a command string in a shell, output goes to stdout

Since: 0.2.0

sudo Source #

Arguments

:: String	command
-> [String]	arguments
-> IO String

sudo c args runs a command as sudo returning stdout

Result type changed from IO () to IO String in 0.2.0

sudo_ Source #

Arguments

:: String	command
-> [String]	arguments
-> IO ()

sudo_ c args runs a command as sudo

Since: 0.2.0

warning :: String -> IO () Source #

warning outputs to stderr

Since: 0.2.0

type PipeCommand = (String, [String]) Source #

Type alias for a command in a pipe

Since: 0.2.0

pipe :: PipeCommand -> PipeCommand -> IO String Source #

Return stdout from piping the output of one process to another

Since: 0.2.0

pipe_ :: PipeCommand -> PipeCommand -> IO () Source #

Pipe two commands without returning anything

Since: 0.2.0

pipeBool :: PipeCommand -> PipeCommand -> IO Bool Source #

Bool result of piping of commands

Since: 0.2.0

pipe3 :: PipeCommand -> PipeCommand -> PipeCommand -> IO String Source #

Pipe 3 commands, returning stdout

Since: 0.2.3

pipe3_ :: PipeCommand -> PipeCommand -> PipeCommand -> IO () Source #

Pipe 3 commands, not returning anything

Since: 0.2.0

pipeFile_ :: FilePath -> PipeCommand -> PipeCommand -> IO () Source #

Pipe a file to the first of a pipe of commands

Since: 0.2.0

whenM :: Monad m => m Bool -> m () -> m () #

(+-+) :: String -> String -> String infixr 4 Source #

Combine two strings with a single space