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Alexander Cyon 419c53bf24 Add flag 'log-color' preserving color of log redirected to file. (#3538)
Add flag 'log-color' which preserves colors of log when stdout is redirected to a file.

This is my first lighthouse PR, please let me know if I'm not following contribution guidelines, I welcome meta-feeback (feedback on git commit messages, git branch naming, and the contents of the description of this PR.)

## Issue Addressed

Solves https://github.com/sigp/lighthouse/issues/3527

## Proposed Changes

Adding a flag which enables log color preserving when stdout is redirected to a file.

### Usage
Below I demonstrate current behaviour (without using the new flag) and the new behaviur (when using new flag).

In the screenshot below, I have to panes, one on top running `lighthouse` which redirects to file `~/Desktop/test.log` and one pane in the bottom which runs `tail -f ~/Desktop/test.log`.

#### Current behaviour
```sh
lighthouse --network prater vc |& tee -a ~/Desktop/test.log
```

**Result is no colors**

<img width="1624" alt="current" src="https://user-images.githubusercontent.com/864410/188258226-bfcf8271-4c9e-474c-848e-ac92a60df25c.png">


#### New behaviour
```sh
lighthouse --network prater vc --log-color |& tee -a ~/Desktop/test.log
```

**Result is colors** 🔴🟢🔵🟡

<img width="1624" alt="new" src="https://user-images.githubusercontent.com/864410/188258223-7d9ecf09-92c8-4cba-8f24-bd4d88fc0353.png">

## Additional Info

I chose American spelling of "color" instead of Brittish "colour' since that was aligned with `slog`'s API - method`force_color()`, let me know if you prefer spelling "colour" instead. I also chose to let it be an arg not taking any argument, just like `logfile-compress` flag, rather than having to write `--log-color true`.
2022-09-06 05:58:27 +00:00
.github Docker builds in GitHub actions (#3523) 2022-08-29 18:31:27 +00:00
account_manager Builder Specs v0.2.0 (#3134) 2022-07-30 00:22:37 +00:00
beacon_node Configurable monitoring endpoint frequency (#3530) 2022-09-05 08:29:00 +00:00
book Update graffiti.md (#3537) 2022-09-05 08:29:02 +00:00
boot_node v3.1.0 (#3525) 2022-08-31 22:21:55 +00:00
common Configurable monitoring endpoint frequency (#3530) 2022-09-05 08:29:00 +00:00
consensus Strict count unrealized (#3522) 2022-09-05 04:50:47 +00:00
crypto crypto/bls: make blst dependency optional (#3387) 2022-08-08 23:56:59 +00:00
database_manager Use async code when interacting with EL (#3244) 2022-07-03 05:36:50 +00:00
lcli Add flag 'log-color' preserving color of log redirected to file. (#3538) 2022-09-06 05:58:27 +00:00
lighthouse Add flag 'log-color' preserving color of log redirected to file. (#3538) 2022-09-06 05:58:27 +00:00
scripts Builder Specs v0.2.0 (#3134) 2022-07-30 00:22:37 +00:00
slasher Modularise slasher backend (#3443) 2022-08-15 01:30:56 +00:00
testing Add flag 'log-color' preserving color of log redirected to file. (#3538) 2022-09-06 05:58:27 +00:00
validator_client Configurable monitoring endpoint frequency (#3530) 2022-09-05 08:29:00 +00:00
.dockerignore Exclude EE build dirs from Docker context (#3174) 2022-05-09 23:43:31 +00:00
.editorconfig Add editorconfig template 2019-03-11 15:09:57 +11:00
.gitignore Allow setting web3signer version through environment (#3368) 2022-07-27 03:20:01 +00:00
.gitmodules Replace EF tests submodule with a makefile 2019-09-08 04:19:54 +10:00
bors.toml Add merge support to simulator (#3292) 2022-07-18 23:15:40 +00:00
Cargo.lock Subscribe to subnets only when needed (#3419) 2022-09-05 00:22:48 +00:00
Cargo.toml Subscribe to subnets only when needed (#3419) 2022-09-05 00:22:48 +00:00
CONTRIBUTING.md [Contribution docs] Add GitPOAP Badge to Display Number of Minted GitPOAPs for Contributors (#3343) 2022-08-09 02:27:04 +00:00
Cross.toml Update Cross config for v0.2.2 (#3286) 2022-06-29 04:50:36 +00:00
Dockerfile docker rust version update (#3353) 2022-07-20 18:18:25 +00:00
Dockerfile.cross Use a stable tag for ubuntu in dockerfile (#3231) 2022-05-31 06:09:12 +00:00
LICENSE Update License to Apache 2.0 2019-04-15 16:47:35 +10:00
Makefile Modularise slasher backend (#3443) 2022-08-15 01:30:56 +00:00
README.md Remove build status badge from README (#3195) 2022-05-20 05:02:14 +00:00
SECURITY.md Add how users should report security vulnerabilities for this repository (#2562) 2021-09-07 01:54:05 +00:00

Lighthouse: Ethereum consensus client

An open-source Ethereum consensus client, written in Rust and maintained by Sigma Prime.

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Lighthouse is:

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