installer: homebrew

[Gankra]

It would be nice for cargo-dist to be able to generate a homebrew formula for your package, similar to the npm installer, which:

• detects your platform (constructs a target triple)
• fetches your prebuilt binaries
• unpacks them as appropriate for a homebrew package

Initial discussion is that this requires us to:

• generate a ruby script ("the formula")
• help the user define a tap for their formulas (git repo containing some text files)
  • easiest might be adding a formulas/ dir to the root of their actual project

I expect that much of the logic here will be shared with the "shell" installer. Hopefully a lot of the places that need to be changed can be found by just adding a new variant to this enum and following the compiler errors.

cargo-dist/cargo-dist/src/cli.rs

Lines 249 to 258 in 7a8ce38

	/// A style of installer to generate
	#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, ValueEnum)]
	pub enum InstallerStyle {
	/// Generates a shell script that fetches/installs the right build
	Shell,
	/// Generates a powershell script that fetches/installs the right build
	Powershell,
	/// Generates an npm project that fetches the right build to your node_modules
	Npm,
	}

[Gankra]

If you want to publish a GUI, you want cask (#309)

[Gankra]

done in #318, #339, and #353 and available in 0.2.0-prerelease.6 (0.2.0 out this week)

🎊