RPC to allow setting the log filter (#7474)

* Add filter reload handle

* add RPC, move logging module from cli to tracing

* remove dup fn

* working example

* Update client/rpc-api/src/system/mod.rs

Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>

* Prefer "set" to "reload"

* Re-enable the commented out features of the logger

* Remove duplicate code

* cleanup

* unneeded lvar

* Bump to latest patch release

* Add new CLI option to disable log filter reloading,

Move profiling CLI options to SharedParams

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Applied suggestions from reviews

* Fix calls to init_logger()

* Handle errors when parsing logging directives

* Deny `system_setLogFilter` RPC by default

* One more time

* Don't ignore parse errors for log directives set via CLI or RPC

* Improve docs

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update client/cli/src/config.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* fix merge errors

* include default directives with system_setLogFilter RPC,

implement system_rawSetLogFilter RPC to exclude defaults

* docs etc...

* update test

* refactor: rename fn

* Add a test for system_set_log_filter – NOTE: the code should likely change to return an error when bad directives are passed

* Update client/cli/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Address review grumbles

* Add doc note on panicking behaviour

* print all invalid directives before panic

* change RPCs to: addLogFilter and resetLogFilter

* make CLI log directives default

* add comments

* restore previous behaviour to panic when hard-coded directives are invalid

* change/refactor directive parsing

* fix line width

* add test for log filter reloading

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* finish up suggestions from code review

* improve test

* change expect message

* change fn name

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* add docs, remove unused fn

* propagate Err on invalid log directive

* Update tracing-subscriber version

* Improve docs for `disable_log_reloading` CLI param

Co-authored-by: Matt <mattrutherford@users.noreply.github.com>
Co-authored-by: David <dvdplm@gmail.com>
Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>
Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

substrate/Cargo.lock

@@ -6389,7 +6389,6 @@ dependencies = [
  "fdlimit",
  "futures 0.3.8",
  "hex",
- "lazy_static",
  "libp2p",
  "log",
  "names",
@@ -7139,11 +7138,13 @@ dependencies = [
  "parity-scale-codec",
  "parking_lot 0.10.2",
  "sc-block-builder",
+ "sc-cli",
  "sc-client-api",
  "sc-executor",
  "sc-keystore",
  "sc-network",
  "sc-rpc-api",
+ "sc-tracing",
  "sc-transaction-pool",
  "serde_json",
  "sp-api",
@@ -7381,9 +7382,13 @@ dependencies = [
 name = "sc-tracing"
 version = "2.0.0"
 dependencies = [
+ "ansi_term 0.12.1",
  "erased-serde",
+ "lazy_static",
  "log",
+ "once_cell",
  "parking_lot 0.10.2",
+ "regex",
  "rustc-hash",
  "sc-telemetry",
  "serde",
@@ -7392,6 +7397,7 @@ dependencies = [
  "sp-tracing",
  "tracing",
  "tracing-core",
+ "tracing-log",
  "tracing-subscriber",
 ]