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as a way to "lock" the log root to an absolute path. This makes for easier debugging, as a call to application:get_env(lager, log_root) would immediately tell us where the log is in the disk.
I just prepared to commit the following comment to the above code in our project. :)
%% See https://github.com/erlang-lager/lager/issues/557%% There are different ways to ensure that the log root is a stable%% absolute path (once initialized). This could also be done using%% sys.config.src (e.g. `{log_root, "${ROOTDIR}/log"}`, but at the time%% of writing, `rebar3 ct` doesn't support `sys_config_src`, and it gets messy%% to support both types.%%%% This setup hook code will likely run after lager has started, but it still%% fixes the log root for later. One possible scenario might be that someone%% pecks around in an aeternity node shell, changes the current working directory%% and forgets to restore it. This would effectively move the logical log_root%% in lager, if the setting is a relative path (which is the default).%%
As per a recent discussion with @uwiger, on Slack,
lager
could be doing something like:as a way to "lock" the log root to an absolute path. This makes for easier debugging, as a call to
application:get_env(lager, log_root)
would immediately tell us where the log is in the disk.@mrallen1, @Vagabond, thoughts?
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