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add document under what conditions log_with_stdout and log_with_stderr log #126

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Mar 3, 2017
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add document under what conditions log_with_stdout and log_with_stderr log #126

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10 changes: 8 additions & 2 deletions src/Shelly.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -828,12 +828,18 @@ verbosely a = sub $ modify (\x -> x
, sPrintCommands = True
}) >> a

-- | Create a sub-Sh in which stdout is sent to the user-defined logger
-- | Create a sub-Sh in which stdout is sent to the user-defined
-- logger. When running with 'silently' the given log will not be
-- called for any output. Likewise the log will also not be called for
-- output from 'run_' and 'bash_' commands.
log_stdout_with :: (Text -> IO ()) -> Sh a -> Sh a
log_stdout_with logger a = sub $ modify (\s -> s { sPutStdout = logger })
>> a

-- | Create a sub-Sh in which stderr is sent to the user-defined logger
-- | Create a sub-Sh in which stderr is sent to the user-defined
-- logger. When running with 'silently' the given log will not be
-- called for any output. However, unlike 'log_stdout_with' the log
-- will be called for output from 'run_' and 'bash_' commands.
log_stderr_with :: (Text -> IO ()) -> Sh a -> Sh a
log_stderr_with logger a = sub $ modify (\s -> s { sPutStderr = logger })
>> a
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