| 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)
- 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)
- 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 ()
- pipeFile_ :: FilePath -> PipeCommand -> PipeCommand -> IO ()
- whenM :: Monad m => m Bool -> m () -> m ()
- (+-+) :: String -> String -> String
Documentation
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
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
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)
Arguments
| :: String | pattern |
| -> FilePath | file |
| -> IO Bool | result |
grep_ pat file greps pattern in file and returns Boolean status
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
shellBool :: String -> IO Bool Source #
shellBool cs runs a command string in a shell, output goes to stdout
Since: 0.2.0
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
Arguments
| :: String | command |
| -> [String] | arguments |
| -> IO () |
sudo_ c args runs a command as sudo
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 () Source #
Pipe 3 commands, no 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