Add support for signed commits through the Github API

README.md

@@ -258,6 +258,9 @@ token:
 topic:
   - example
 
+# Attempt to commit and push through the Github API, rather than pushing through the git client.
+use-gh-api: false
+
 # The name of a user. All repositories owned by that user will be used.
 user:
   - example
@@ -699,6 +702,7 @@ Flags:
       --team-reviewers strings     Github team names of the reviewers, in format: 'org/team'
   -T, --token string               The personal access token for the targeting platform. Can also be set using the GITHUB_TOKEN/GITLAB_TOKEN/GITEA_TOKEN/BITBUCKET_SERVER_TOKEN environment variable.
       --topic strings              The topic of a GitHub/GitLab/Gitea repository. All repositories having at least one matching topic are targeted.
+      --use-gh-api                 Attempt to commit and push through the Github API, rather than pushing through the git client.
   -U, --user strings               The name of a user. All repositories owned by that user will be used.
   -u, --username string            The Bitbucket server username.
 ```

cmd/cmd-run.go

@@ -61,6 +61,7 @@ Available values:
 	_ = cmd.RegisterFlagCompletionFunc("conflict-strategy", func(cmd *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDirective) {
 		return []string{"skip", "replace"}, cobra.ShellCompDirectiveNoFileComp
 	})
+	cmd.Flags().BoolP("use-gh-api", "", false, "Attempt to commit and push through the Github API, rather than pushing through the git client.")
 	cmd.Flags().StringSliceP("labels", "", nil, "Labels to be added to any created pull request.")
 	cmd.Flags().StringP("author-name", "", "", "Name of the committer. If not set, the global git config setting will be used.")
 	cmd.Flags().StringP("author-email", "", "", "Email of the committer. If not set, the global git config setting will be used.")
@@ -92,6 +93,7 @@ func run(cmd *cobra.Command, _ []string) error {
 	concurrent, _ := flag.GetInt("concurrent")
 	skipPullRequest, _ := flag.GetBool("skip-pr")
 	pushOnly, _ := flag.GetBool("push-only")
+	useGHAPI, _ := flag.GetBool("use-gh-api")
 	skipRepository, _ := flag.GetStringSlice("skip-repo")
 	interactive, _ := flag.GetBool("interactive")
 	dryRun, _ := flag.GetBool("dry-run")
@@ -241,6 +243,7 @@ func run(cmd *cobra.Command, _ []string) error {
 		ForkOwner:              forkOwner,
 		SkipPullRequest:        skipPullRequest,
 		PushOnly:               pushOnly,
+		UseGHAPI:               useGHAPI,
 		SkipRepository:         skipRepository,
 		CommitAuthor:           commitAuthor,
 		BaseBranch:             baseBranchName,

internal/git/cmdgit/git.go

@@ -149,3 +149,15 @@ func (g *Git) AddRemote(name, url string) error {
 	_, err := g.run(cmd)
 	return err
 }
+
+func (g *Git) Additions() map[string]string {
+	return make(map[string]string)
+}
+
+func (g *Git) Deletions() []string {
+	return make([]string, 0)
+}
+
+func (g *Git) OldHash() string {
+	return ""
+}

internal/git/gogit/git.go

@@ -3,6 +3,8 @@ package gogit
 import (
 	"bytes"
 	"context"
+	"encoding/base64"
+	"os"
 	"time"
 
 	"github.com/go-git/go-git/v5/config"
@@ -22,6 +24,10 @@ type Git struct {
 	FetchDepth int    // Limit fetching to the specified number of commits
 
 	repo *git.Repository // The repository after the clone has been made
+
+	additions map[string]string // Files being added (used for GHAPI)
+	deletions []string          // Files being remove (used for GHAPI)
+	oldHash   plumbing.Hash
 }
 
 // Clone a repository
@@ -75,6 +81,37 @@ func (g *Git) Changes() (bool, error) {
 	return !status.IsClean(), nil
 }
 
+func (g *Git) GetFileChangesAsBase64(w git.Worktree) error {
+	treeStatus, err := w.Status()
+
+	if err != nil {
+		return err
+	}
+
+	g.additions = make(map[string]string)
+
+	for path, status := range treeStatus {
+		s := status.Worktree
+
+		if s == git.Deleted || s == git.Renamed || s == git.Copied {
+			g.deletions = append(g.deletions, path)
+		} else if s == git.Added || s == git.Modified || s == git.Untracked {
+			data, err := os.ReadFile(g.Directory + "/" + path)
+
+			if err != nil {
+				return err
+			}
+
+			output := make([]byte, base64.StdEncoding.EncodedLen(len(data)))
+			base64.StdEncoding.Encode(output, data)
+
+			g.additions[path] = string(output)
+		}
+	}
+
+	return nil
+}
+
 // Commit and push all changes
 func (g *Git) Commit(commitAuthor *internalgit.CommitAuthor, commitMessage string) error {
 	w, err := g.repo.Worktree()
@@ -89,6 +126,11 @@ func (g *Git) Commit(commitAuthor *internalgit.CommitAuthor, commitMessage strin
 	}
 	w.Excludes = patterns
 
+	err = g.GetFileChangesAsBase64(*w)
+	if err != nil {
+		return err
+	}
+
 	err = w.AddWithOptions(&git.AddOptions{
 		All: true,
 	})
@@ -117,7 +159,7 @@ func (g *Git) Commit(commitAuthor *internalgit.CommitAuthor, commitMessage strin
 	if err != nil {
 		return err
 	}
-	oldHash := oldHead.Hash()
+	g.oldHash = oldHead.Hash()
 
 	var author *object.Signature
 	if commitAuthor != nil {
@@ -140,7 +182,7 @@ func (g *Git) Commit(commitAuthor *internalgit.CommitAuthor, commitMessage strin
 		return err
 	}
 
-	_ = g.logDiff(oldHash, commit.Hash)
+	_ = g.logDiff(g.oldHash, commit.Hash)
 
 	return nil
 }
@@ -210,6 +252,18 @@ func (g *Git) Push(ctx context.Context, remoteName string, force bool) error {
 	})
 }
 
+func (g *Git) Additions() map[string]string {
+	return g.additions
+}
+
+func (g *Git) Deletions() []string {
+	return g.deletions
+}
+
+func (g *Git) OldHash() string {
+	return g.oldHash.String()
+}
+
 // AddRemote adds a new remote
 func (g *Git) AddRemote(name, url string) error {
 	_, err := g.repo.CreateRemote(&config.RemoteConfig{

internal/multigitter/run.go

@@ -68,6 +68,7 @@ type Runner struct {
 	ForkOwner string // The owner of the new fork. If empty, the fork should happen on the logged in user
 
 	ConflictStrategy ConflictStrategy // Defines what will happen if a branch already exists
+	UseGHAPI         bool
 
 	Draft bool // If set, creates Pull Requests as draft
 
@@ -338,7 +339,38 @@ func (r *Runner) runSingleRepo(ctx context.Context, repo scm.Repository) (scm.Pu
 
 	log.Info("Pushing changes to remote")
 	forcePush := featureBranchExist && r.ConflictStrategy == ConflictStrategyReplace
-	err = sourceController.Push(ctx, remoteName, forcePush)
+	if r.UseGHAPI {
+		if ghapi, ok := r.VersionController.(interface {
+			CommitAndPushThoughGraphQL(ctx context.Context,
+				headline string,
+				featureBranch string,
+				cloneURL string,
+				oldHash string,
+				additions map[string]string,
+				deletions []string,
+				forcePush bool,
+				branchExist bool) error
+		}); ok {
+			err = ghapi.CommitAndPushThoughGraphQL(ctx,
+				r.CommitMessage,
+				r.FeatureBranch,
+				repo.CloneURL(),
+				sourceController.OldHash(),
+				sourceController.Additions(),
+				sourceController.Deletions(),
+				forcePush,
+				featureBranchExist)
+			if err != nil {
+				return nil, err
+			}
+		} else {
+			log.Info("Could not find CommitThroughAPI, falling back on default push")
+			err = sourceController.Push(ctx, remoteName, forcePush)
+		}
+	} else {
+		err = sourceController.Push(ctx, remoteName, forcePush)
+	}
+
 	if err != nil {
 		return nil, errors.Wrap(err, "could not push changes")
 	}

internal/multigitter/shared.go

@@ -34,6 +34,9 @@ type Git interface {
 	BranchExist(remoteName, branchName string) (bool, error)
 	Push(ctx context.Context, remoteName string, force bool) error
 	AddRemote(name, url string) error
+	Additions() map[string]string
+	Deletions() []string
+	OldHash() string
 }
 
 type stackTracer interface {