Procex.Quick

This module defines functions and type classes for making the syntax more succint.

Documentation

(<!|) :: QuickCmd a => Cmd -> Cmd -> a infixl 1

Pipe from the right command's stderr to the left command. Returns the left command modified.

(<<<) :: (QuickCmd a, ToByteString b) => Cmd -> b -> a infixl 1

Pass a string as stdin.

(<|) :: QuickCmd a => Cmd -> Cmd -> a infixl 1

Pipe from the right command to the left command. Returns the left command modified.

(|!>) :: QuickCmd a => Cmd -> Cmd -> a infixl 1

Pipe from the left command's stderr to the right command. Returns the left command modified.

(|>) :: QuickCmd a => Cmd -> Cmd -> a infixl 1

Pipe from the left command to the right command. Returns the left command modified.

capture :: Cmd -> IO ByteString

captureFd for stdout.

captureNoThrow :: Cmd -> IO ByteString

captureFdNoThrow for stdout.

captureLazy :: Cmd -> IO ByteString

captureFdLazy for stdout.

captureLazyNoThrow :: Cmd -> IO ByteString

captureFdLazyNoThrow for stdout.

captureErr :: Cmd -> IO ByteString

captureFd for stderr.

captureErrNoThrow :: Cmd -> IO ByteString

captureFdNoThrow for stderr.

captureErrLazy :: Cmd -> IO ByteString

captureFdLazy for stderr..

captureErrLazyNoThrow :: Cmd -> IO ByteString

captureFdLazyNoThrow for stderr.

captureFd :: Fd -> Cmd -> IO ByteString

Capture the output of the fd of the command strictly, err if the command exits with a non-zero exit code.

captureFdNoThrow :: Fd -> Cmd -> IO ByteString

Capture the output of the fd of the command strictly. Ignores process exit code.

captureFdLazy :: Fd -> Cmd -> IO ByteString

Capture the output of the fd of the command lazily. If the process exits with a non-zero exit code, reading from the bytestring will throw CmdException. Garbage collection will close the pipe.

captureFdLazyNoThrow :: Fd -> Cmd -> IO ByteString

Capture the output of the fd of the command lazily. Ignores process exit code. Garbage collection will close the pipe.

pipeArgStrIn :: ToByteString b => b -> Cmd -> Cmd

Pass an argument of the form /proc/self/fd/<n> to the process, where n is the reader end of a pipe which the passed string is written to.

mq

Arguments

:: (QuickCmd a, ToByteString b)

=> b

The path to the executable, uses PATH

-> a

Either a Cmd, an IO (), or a function that takes Cmd -> Cmd , String or ByteString

>>> mq "cat" "/dev/null" (pipeArgIn 1 $ mq "cat" "/dev/null") <<< "somestr"

The first argument is the path, and the subsequent arguments are QuickCmdArg. At the end you will either have an IO () (synchronous execution) or Cmd (which you can further use).

class QuickCmd a where

A helper class to allow lightweight syntax for executing commands

Methods

quickCmd :: Cmd -> a

Instances

QuickCmd Cmd

Defined in Procex.Quick

Methods

quickCmd :: Cmd -> Cmd

a ~ () => QuickCmd (IO a)

Defined in Procex.Quick

Methods

quickCmd :: Cmd -> IO a

(QuickCmdArg a, QuickCmd b) => QuickCmd (a -> b)

Defined in Procex.Quick

Methods

quickCmd :: Cmd -> a -> b

class QuickCmdArg a where

If a type implements this, you can pass it to mq.

Methods

quickCmdArg :: a -> Cmd -> Cmd

Instances

QuickCmdArg ByteString

Defined in Procex.Quick

Methods

quickCmdArg :: ByteString -> Cmd -> Cmd

QuickCmdArg [Char]

Defined in Procex.Quick

Methods

quickCmdArg :: [Char] -> Cmd -> Cmd

QuickCmdArg [Cmd -> Cmd]

Defined in Procex.Quick

Methods

quickCmdArg :: [Cmd -> Cmd] -> Cmd -> Cmd

QuickCmdArg [String]

UTF-8 encoded

Defined in Procex.Quick

Methods

quickCmdArg :: [String] -> Cmd -> Cmd

QuickCmdArg [ByteString]

Defined in Procex.Quick

Methods

quickCmdArg :: [ByteString] -> Cmd -> Cmd

QuickCmdArg (Cmd -> Cmd)

Defined in Procex.Quick

Methods

quickCmdArg :: (Cmd -> Cmd) -> Cmd -> Cmd

class ToByteString a where

A helper class to convert to bytestrings with UTF-8 encoding

Methods

toByteString :: a -> ByteString

Instances

ToByteString ByteString

Defined in Procex.Quick

Methods

toByteString :: ByteString -> ByteString

ToByteString ByteString

Defined in Procex.Quick

Methods

toByteString :: ByteString -> ByteString0

a ~ Char => ToByteString [a]

Defined in Procex.Quick

Methods

toByteString :: [a] -> ByteString