refactor(git): rework git package

pkg/git/commit.go

@@ -0,0 +1,154 @@
+package git
+
+import (
+	"errors"
+	"os"
+	"time"
+
+	"github.com/ProtonMail/go-crypto/openpgp"
+	"github.com/ProtonMail/go-crypto/openpgp/armor"
+	"github.com/go-git/go-billy/v5"
+	"github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/config"
+	"github.com/go-git/go-git/v5/plumbing"
+	"github.com/go-git/go-git/v5/plumbing/object"
+)
+
+type CommitOption func(*Commit)
+
+func WithAuthor(name, email string) CommitOption {
+	return func(c *Commit) {
+		c.Author = &object.Signature{
+			Name:  name,
+			Email: email,
+			When:  time.Now(),
+		}
+	}
+}
+
+func WithCommitter(name, email string) CommitOption {
+	return func(c *Commit) {
+		c.Committer = &object.Signature{
+			Name:  name,
+			Email: email,
+			When:  time.Now(),
+		}
+	}
+}
+
+func WithFileContent(content []byte, file billy.File) CommitOption {
+	return func(c *Commit) {
+		c.Content = content
+		c.File = file
+	}
+}
+
+type Commit struct {
+	Author    *object.Signature
+	Committer *object.Signature
+	Content   []byte
+	File      billy.File
+
+	project *Project
+}
+
+func (p *Project) NewCommit(options ...CommitOption) *Commit {
+	commit := &Commit{project: p}
+
+	for _, option := range options {
+		option(commit)
+	}
+
+	return commit
+}
+
+func (c *Commit) Create(msg string) error {
+	var (
+		signer *openpgp.Entity
+	)
+
+	if c.project.KeyFile != "" {
+		file, err := os.Open(c.project.KeyFile)
+		if err != nil {
+			return err
+		}
+		defer file.Close()
+
+		block, err := armor.Decode(file)
+		if err != nil {
+			return err
+		}
+
+		entityList, err := openpgp.ReadKeyRing(block.Body)
+		if err != nil || len(entityList) < 1 {
+			return err
+		}
+
+		signer = entityList[0]
+	}
+
+	worktree, err := c.project.repository.Worktree()
+	if err != nil {
+		return err
+	}
+
+	_, err = c.project.repository.Branch(c.project.Branch)
+	if errors.Is(err, git.ErrBranchNotFound) {
+		err = c.project.repository.CreateBranch(
+			&config.Branch{Name: c.project.Branch, Remote: c.project.Branch},
+		)
+		if err != nil {
+			return err
+		}
+	}
+	if err != nil {
+		return err
+	}
+
+	err = worktree.Checkout(&git.CheckoutOptions{
+		Branch: plumbing.ReferenceName(c.project.Branch),
+	})
+	if err != nil {
+		return err
+	}
+
+	if _, err = c.File.Write(c.Content); err != nil {
+		return err
+	}
+
+	if err = c.File.Close(); err != nil {
+		return err
+	}
+
+	if _, err = worktree.Add(c.File.Name()); err != nil {
+		return err
+	}
+
+	commitOpts := git.CommitOptions{Author: c.Author}
+
+	if c.Committer != nil {
+		commitOpts.Committer = c.Committer
+	}
+
+	if signer != nil {
+		commitOpts.SignKey = signer
+	}
+
+	_, err = worktree.Commit(msg, &commitOpts)
+	return err
+}
+
+func (c *Commit) Push() error {
+	origin, err := c.project.repository.Remote("origin")
+	if err != nil {
+		return err
+	}
+
+	pushOpts := git.PushOptions{}
+
+	if c.project.auth != nil {
+		pushOpts.Auth = c.project.auth
+	}
+
+	return origin.Push(&pushOpts)
+}