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package git
import (
"errors"
"fmt"
"io"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/object"
)
var ()
var (
MissingRefErr = errors.New("Reference not found")
)
type (
GitRepository struct {
path string
repository *git.Repository
ref plumbing.Hash
// this is setRef when ref is setRef
setRef bool
}
)
func OpenRepository(dir string) (*GitRepository, error) {
g := &GitRepository{
path: dir,
}
repo, err := git.PlainOpen(dir)
if err != nil {
return nil, err
}
g.repository = repo
return g, nil
}
func (g *GitRepository) SetRef(ref string) error {
if ref == "" {
head, err := g.repository.Head()
if err != nil {
return errors.Join(MissingRefErr, err)
}
g.ref = head.Hash()
} else {
hash, err := g.repository.ResolveRevision(plumbing.Revision(ref))
if err != nil {
return errors.Join(MissingRefErr, err)
}
g.ref = *hash
}
g.setRef = true
return nil
}
func (g *GitRepository) Path() string {
return g.path
}
func (g *GitRepository) LastCommit() (*object.Commit, error) {
err := g.validateRef()
if err != nil {
return nil, err
}
c, err := g.repository.CommitObject(g.ref)
if err != nil {
return nil, err
}
return c, nil
}
func (g *GitRepository) Commits() ([]*object.Commit, error) {
err := g.validateRef()
if err != nil {
return nil, err
}
ci, err := g.repository.Log(&git.LogOptions{From: g.ref})
if err != nil {
return nil, fmt.Errorf("commits from ref: %w", err)
}
commits := []*object.Commit{}
// TODO: for now only load first 1000
for x := 0; x < 1000; x++ {
c, err := ci.Next()
if err != nil && errors.Is(err, io.EOF) {
break
} else if err != nil {
return nil, err
}
commits = append(commits, c)
}
if err != nil {
return nil, err
}
return commits, nil
}
func (g *GitRepository) Head() (*plumbing.Reference, error) {
return g.repository.Head()
}
func (g *GitRepository) Tags() ([]*object.Tag, error) {
ti, err := g.repository.TagObjects()
if err != nil {
return nil, err
}
tags := []*object.Tag{}
err = ti.ForEach(func(t *object.Tag) error {
tags = append(tags, t)
return nil
})
if err != nil {
return nil, err
}
return tags, nil
}
func (g *GitRepository) Branches() ([]*plumbing.Reference, error) {
bs, err := g.repository.Branches()
if err != nil {
return nil, err
}
branches := []*plumbing.Reference{}
err = bs.ForEach(func(ref *plumbing.Reference) error {
branches = append(branches, ref)
return nil
})
if err != nil {
return nil, err
}
return branches, nil
}
func (g *GitRepository) validateRef() error {
if !g.setRef {
return g.SetRef("")
}
return nil
}
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