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internal/devpkg: add PackageSpec for parsing package strings #1878

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internal/devpkg: add PackageSpec for parsing package strings #1878

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Commits on Jul 7, 2024

  1. internal/devconfig: add PackageSpec for parsing package strings 

    Attempt to formalize raw Devbox package strings (hereby called package
specs) by introducing a new `PackageSpec` type.

This commit just adds the new parsing logic, it doesn't integrate it
with any other code yet. The `PackageSpec` type is the result of parsing
a raw string with `ParsePackageSpec`:

	type PackageSpec struct {
		Name, Version       string
		Installable         flake.Installable
		AttrPathInstallable flake.Installable
		RunX                types.PkgRef
	}

	func ParsePackageSpec(raw, nixpkgsCommit string) PackageSpec

When a package spec is ambiguous, `ParsePackageSpec` will populate the
`PackageSpec` fields with all possible interpretations. For example, the
spec `go` could be `go@latest`, a flake named `go`, or the attribute
path `nixpkgs#go`. It's up to a resolver to try them in some priority
order and pick one.
    @gcurtis
    gcurtis committed Jul 7, 2024
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