split

type BranchRequest struct {
	Branch  string   // required
	Options *Options // optional, defaults to nil

	// SelectCommits is a function that allows the user to select commits
	// for splitting the branch if the --at flag is not provided.
	SelectCommits func(context.Context, []git.CommitDetail) ([]Point, error)
}

type BranchResult struct {
	// Top is the name of the branch assigned to the topmost commit
	// after the split.
	//
	// This is normally the original branch name,
	// but if the original branch was reassigned to a lower commit,
	// this will be the name of the branch
	// assigned to the original HEAD commit.
	Top string
}

type GitRepository interface {
	BranchExists(ctx context.Context, branch string) bool
	PeelToCommit(ctx context.Context, ref string) (git.Hash, error)
	SetBranchUpstream(ctx context.Context, branch, upstream string) error
	BranchUpstream(ctx context.Context, branch string) (string, error)
	ListCommitsDetails(ctx context.Context, commits git.CommitRange) iter.Seq2[git.CommitDetail, error]
	SetRef(ctx context.Context, req git.SetRefRequest) error
}

type Handler struct {
	Log            *silog.Logger                            // required
	View           ui.View                                  // required
	Repository     GitRepository                            // required
	Store          Store                                    // required
	Service        Service                                  // required
	FindForge      func(forgeID string) (forge.Forge, bool) // required
	HighlightStyle lipgloss.Style                           // required
}

type Options struct {
	At []Point `placeholder:"COMMIT:NAME" help:"Commits to split the branch at."`
}

type Point struct {
	// Commit is the git commit hash to split at.
	Commit string

	// Name is the name of the new branch to create at the commit.
	Name string
}

type Service interface {
	LookupBranch(ctx context.Context, name string) (*spice.LookupBranchResponse, error)
}

type Store interface {
	Trunk() string
	Remote() (string, error)
	BeginBranchTx() *state.BranchTx
}