tree 225e544b845cf6e54a0d2a931b0d902fd1b86782
parent 39936e3402cab7eaa5a52ce3e928b41843d2ac59
author Patrick Williams <patrick@stwcx.xyz> 1636893201 -0600
committer Patrick Williams <patrick@stwcx.xyz> 1637087305 +0000

lg2: reduce stdout and allow customization

It was reported by users that the information logged to the TTY was too
much in many cases, which limited the usability of lg2.  Allow users to
customize the output by setting the "LG2_FORMAT" environment variable
and limit the default output to just "<level> message".

Tested:

Added a simple log to the beginning of an existing daemon and tested
format strings:

```
    $ ./health-monitor
    <6> Here I am!
    $ LG2_FORMAT="{%l} %m %% [%f:%L:%F]|%" ./health-monitor
    {6} Here I am! % [int main():511:../healthMonitor.cpp]|%
```

Resolves openbmc/phosphor-logging#26.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ie50c90f073539812c0693d05fc04ce7ad2b3fbcd