New monitor type that emits a JSON object for each log message.
Unlike other monitors:
- The constructor takes a build manifest as argument to initialise the
Pipeline and Stage counts for the Progress part of the report.
- It doesn't print a 'result' at the end of the build.
- The log() method that prints a log message supports specifying an
origin to override the default that's set by the constructor.
Although the Logline supports reporting errors separately, this isn't
used yet.
Signed-off-by: Achilleas Koutsou <achilleas@koutsou.net>
da4044bc7b