https://github.com/crystal-community/cr-color-logging
https://github.com/crystal-community/cr-color-logging
Last synced: 3 months ago
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- Host: GitHub
- URL: https://github.com/crystal-community/cr-color-logging
- Owner: crystal-community
- License: mit
- Created: 2022-04-07T20:19:51.000Z (about 3 years ago)
- Default Branch: master
- Last Pushed: 2022-06-14T01:22:20.000Z (about 3 years ago)
- Last Synced: 2025-01-30T06:27:58.276Z (4 months ago)
- Language: Crystal
- Size: 6.84 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Color Logging Formatter
This shard adds a new module `ColorLogging` as well as a new short formatter `ShortColorFormat` to help add a bit of color to your otherwise excellent log lines.
## Installation
1. Add the dependency to your `shard.yml`:
```yaml
dependencies:
cr-color-logging:
github: vici37/cr-color-logging
```
2. Run `shards install`
## Usage
```crystal
require "cr-color-logging"
# This will output all debug and above severity log lines to STDOUT, colored via the ShortColorFormat formatter.
# By default, no colors are set and must be defined.
Log.setup(:debug, Log::IOBackend.new(formatter: Log::ShortColorFormat))
# Define the color you want for which part of the log message. Colors
# are the same as the ones defined in the `colorize` module.
Log::ShortColorFormat.with_color("severity", :red)
Log::ShortColorFormat.with_color("timestamp", :blue)
# Outputting a log now is as simple as:
Log.for(MyClass).info { "my information message" }
```
The full list of parts that the `ShortColorFormat` supports are:
```
timestamp
message
severity
source
after_source
before_data
data
before_context
context
exception
progname
pid
string
```
The `ShortColorFormat` was defined using the same string as the standard `ShortFormat` [here](https://github.com/crystal-lang/crystal/blob/ef05e26d6/src/log/format.cr#L201). A similar macro is also defined for the `ColorLogging` module to define custom formats as well:
```crystal
ColorFormat.define_formatter MyFormat "#{timestamp(after: ":")} #{severity(before: "[", after: "]")} #{message}"
# All parts, with exception to `string`, support a before_ and after_ prefixed part to color those
# specific pieces. If omitted, they inherit from the base part.
MyFormat.with_color("before_severity", :yellow)
MyFormat.with_color("after_severity", :yellow)
MyFormat.with_color("severity", :red)
# It might also be good to skip specific part coloring if a log line is of a sufficient severity.
# This will color the entire line this color if the severity matches.
MyFormat.with_colored_sevirity(Log::Severity::Error, :red)
```
## Contributing
1. Fork it ()
2. Create your feature branch (`git checkout -b my-new-feature`)
3. Commit your changes (`git commit -am 'Add some feature'`)
4. Push to the branch (`git push origin my-new-feature`)
5. Create a new Pull Request
## Contributors
- [Troy Sornson](https://github.com/vici37) - creator and maintainer