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kkirsche
This looks amazing. Viper was something I’ve always removed from my projects as they’re simple tools usually where configuration files don’t make sense, so I really appreciate you sharing this. Excited to see where it goes!
rad_gruchalski
Interesting. I wasn’t usually using viper but on a recent project it was handy.
mountainriver
I want to like Viper but I always find it’s behavior really strange.
rad_gruchalski
Which features are missing?
devonkim
From a quick look it still leverages viper integration for 12 Factor Apps, and since most of Coral’s features are well listed and detailed I’m going to make a presumption that Coral does not support reading environment variables (yet? Seems easy, maybe an opinionated decision?) not from external key value stores like Consul and Etcd. Client libraries for those would certainly cause a lot of extra dependencies.
bigdubs
4 ... of its 5 dependencies. It's just missing Viper. We should do a better job with the title here.

See: - [0] https://github.com/muesli/coral/blob/master/go.mod - [1] https://github.com/spf13/cobra/blob/master/go.mod

racingmars
...but that fifth dependency makes all the difference!

  $ go mod init foo && go get github.com/spf13/cobra && wc -l go.sum
  758 go.sum

  $ go mod init foo && go get github.com/muesli/coral && wc -l go.sum
  10 go.sum
(Number of lines in go.sum != number of transitive dependencies, of course, but the scale of the difference still hints at how much extra is being pulled into your project.)
CraigJPerry
I like this from the readme:

    It's easy to use Coral as a drop-in replacement for Cobra in existing projects, just let gofmt do the heavy lifting for you:

     gofmt -w -r '"github.com/spf13/cobra" -> "github.com/muesli/coral"' .
     gofmt -w -r '"github.com/spf13/cobra/doc" -> "github.com/muesli/coral/doc"' .
     gofmt -w -r 'cobra -> coral' .
     go mod tidy
Having implemented something to do a similar one off refactor in java for thousands of files, that is a breath of fresh air. In java i had to go code -> AST -> perform manipulations -> generate code from AST (with inevitable long PR’s due to generated code not matching 1:1 with parsed original). After having gone through that i think if i had to repeat again with java I’d probably try harder to use structural find and replace.
elesbao
I love the things that the charm gang is working on and the associated projects. The only things that are dragging me out from Rust to Go https://github.com/charmbracelet/
chris_st
Indeed. I've built a few applications recently, and their Bubbletea and Lipgloss libraries are just wonderful to use.