Move more of cmd into public API

[earthboundkid]

I use godo to manage the asset pipeline for my blog. I want to add in minify, and I can do so by just invoking minify as an external binary, but it would be slightly more efficient if I could just import it as a Go package and do something like minifycli.Invoke("-r", "public"). That would require changing it so that the main package is basically only getting the command line options from os and everything else was done in an importable package.

[omeid]

It is already doable and I use minfi with gonzo, see go-gonzo/html.

[tdewolff]

This sounds like a very specific usecase, but as omeid said, wouldn't it be fairly trivial to implement it yourself? I suppose godo already supports recursiveness and file watching, you only need to minify a single file at a time (akin to the implementation in go-gonzo/html), correct me if I'm wrong though...

[earthboundkid]

It's definitely a niche need and doable without a public command package, but you end up mostly just reinventing the wheel. The simplest way is just to copy-paste from the existing package main and then cut out all the parts you don't need, but it's a bit verbose. Nate Finch wrote a good blog post on ways of laying out your packages: https://npf.io/2016/10/reusable-commands/ . Obviously, it's your project, so just take it as a friendly suggestion. If it's interesting to you, I can work on a PR; if it's not, I can just work around it for myself.

[tdewolff]

I don't think I will pick this up any time soon, so I'll close the issue for now. Ideally the minify cmd would be refactored at some point, but this will probably happen whenever I write a similar tool and separate the mutual code. Until then this has little priority.

I've added this to #234 though.