Comparison to github.com/Masterminds/semver

[mattfarina]

@mitchellh Here is the comparison to github.com/Masterminds/semver we spoke about.

• On the Version type being able to access the Major, Minor, and Patch parts by name.
• Constraints support the || operator. For example, >= 1.2.3, < 2 || >= 4.0.0. The or operator separates groups of and operators.
• Support ~ for patch level equals in addition to ~> on constraints.
• Support ^ for major version equality on constraints.
• Support a range syntax like 1.2.3 - 1.3.4 on constraints.
• A validator that provides reasons why a constraint failed (note, this is a PR for semver that should land soon).

I think this is a good start. These features, except the last, are all in use today. The last line was a feature request for a project outside of mine.

Please let me know what you think about these.

[mitchellh]

I've started hacking on this.

For "major", "minor", "patch" by name, is there a reason Segments() doesn't work for you?

[mattfarina]

@mitchellh sorry it took so long to respond. I'm a little behind on my GitHub issues.

Segments() returns a slice of int. To get the major, minor, or patch values is/was a 2 step process. Get the segments and then get the value from the slice. The method names were about developer experience to easily get the value.