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/client/tracing/Cargo.toml

@@ -13,15 +13,20 @@ readme = "README.md"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
+ansi_term = "0.12.1"
+tracing-log = "0.1.1"
 erased-serde = "0.3.9"
+lazy_static = "1.4.0"
 log = { version = "0.4.8" }
+once_cell = "1.4.1"
 parking_lot = "0.10.0"
+regex = "1.4.2"
 rustc-hash = "1.1.0"
 serde = "1.0.101"
 serde_json = "1.0.41"
 slog = { version = "2.5.2", features = ["nested-values"] }
 tracing = "0.1.22"
 tracing-core = "0.1.17"
-tracing-subscriber = "0.2.13"
+tracing-subscriber = "0.2.15"
 sp-tracing = { version = "2.0.0", path = "../../primitives/tracing" }
 sc-telemetry = { version = "2.0.0", path = "../telemetry" }