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d Z d � Z d S( s^ send ui.log() data to a subprocess (EXPERIMENTAL)
This extension lets you specify a shell command per ui.log() event,
sending all remaining arguments to as environment variables to that command.
Each positional argument to the method results in a `MSG[N]` key in the
environment, starting at 1 (so `MSG1`, `MSG2`, etc.). Each keyword argument
is set as a `OPT_UPPERCASE_KEY` variable (so the key is uppercased, and
prefixed with `OPT_`). The original event name is passed in the `EVENT`
environment variable, and the process ID of mercurial is given in `HGPID`.
So given a call `ui.log('foo', 'bar', 'baz', spam='eggs'), a script configured
for the `foo` event can expect an environment with `MSG1=bar`, `MSG2=baz`, and
`OPT_SPAM=eggs`.
Scripts are configured in the `[logtoprocess]` section, each key an event name.
For example::
[logtoprocess]
commandexception = echo "$MSG2$MSG3" > /var/log/mercurial_exceptions.log
would log the warning message and traceback of any failed command dispatch.
Scripts are run asynchronously as detached daemon processes; mercurial will
not ensure that they exit cleanly.
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Arguments are passed on as environment variables.
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