microlens-process-0.1.0.1: Micro-optics for the process library

Copyright2019 Emily Pillmore
LicenseBSD
MaintainerEmily Pillmore <emilypi@cohomolo.gy>
StabilityExperimental
PortabilityTypeFamilies, Rank2Types
Safe HaskellSafe
LanguageHaskell2010

System.Process.Microlens.CreateProcess

Contents

Description

This module provides the associated optics and combinators for working with CreateProcess objects.

Because CreateProcess was created before the `_` prefix record name convention, some record accessors don't have an apparently "good" name for their corresponding lens. Those that do not are post-fixed with `_` i order to denote their lens status. Thankfully, there are 6 that meet the criteria: cmdspec_, env_, cwd_, stdin_, stdout_, and stderr_.

We provide classy variants of what we consider the significant portions of CreateProcess - namely, the std_in, std_out, and std_err entries.

Synopsis

Lenses

cmdspec_ :: Lens' CreateProcess CmdSpec Source #

Lens into the cmdspec entry of the CreateProcess record

cwd_ :: Lens' CreateProcess (Maybe FilePath) Source #

Lens into the cwd entry of the CreateProcess record

env_ :: Lens' CreateProcess (Maybe [(String, String)]) Source #

Lens into the env entry of the CreateProcess record

stdin_ :: Lens' CreateProcess StdStream Source #

Lens into the std_in entry of the CreateProcess record

stdout_ :: Lens' CreateProcess StdStream Source #

Lens into the std_out entry of the CreateProcess record

stderr_ :: Lens' CreateProcess StdStream Source #

Lens into the std_err entry of the CreateProcess record

closefds :: Lens' CreateProcess Bool Source #

Lens into the close_fds entry of the CreateProcess record

newsession :: Lens' CreateProcess Bool Source #

Lens into the new_session entry of the CreateProcess record

childgroup :: Lens' CreateProcess (Maybe CGid) Source #

Lens into the child_group entry of the CreateProcess record

childuser :: Lens' CreateProcess (Maybe CUid) Source #

Lens into the child_user entry of the CreateProcess record

Classy Lenses

class HasStdin a where Source #

Classy lens for types with a stdin

class HasStdout a where Source #

Classy lens for types with a stdout

class HasStderr a where Source #

Classy lens for types with a stderr