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speier/nextver.go

Created December 4, 2024 10:28
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  1. speier created this gist Dec 4, 2024.
    60 changes: 60 additions & 0 deletions nextver.go
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,60 @@
    package main

    import (
    "fmt"
    "os"

    "github.com/Masterminds/semver/v3"
    "github.com/go-git/go-git/v5"
    "github.com/go-git/go-git/v5/plumbing"
    )

    func main() {
    wd, err := os.Getwd()
    if err != nil {
    fatal(err)
    }

    tag := latestTag(wd)
    v := incMinor(tag, "v")

    fmt.Println(v)
    }

    func incMinor(v string, prefix string) string {
    sv, err := semver.NewVersion(v)
    if err != nil {
    fatal(err)
    }

    return fmt.Sprintf("%s%s", prefix, sv.IncMinor())
    }

    func latestTag(wd string) string {
    repo, err := git.PlainOpen(wd)
    if err != nil {
    fatal(err)
    }

    iter, err := repo.Tags()
    if err != nil {
    fatal(err)
    }

    tags := make([]string, 0)
    iter.ForEach(func(ref *plumbing.Reference) error {
    tags = append(tags, ref.Name().Short())
    return nil
    })

    if len(tags) == 0 {
    return "0.0.0"
    }

    return tags[len(tags)-1]
    }

    func fatal(err error) {
    fmt.Println(err)
    os.Exit(1)
    }