Add option to split patch into a new commit

Add GetHeadCommitMessage to read the subject of the HEAD commit
Create PullPatchIntoNewCommit based heavily on PullPatchIntoIndex to
  split the current patch from its commit and apply it in a separate
  commit immediately after.

WIP to Squash - Fill format string with format string

WIP

1 files changed, 20 insertions, 0 deletions

diff --git a/pkg/gui/patch_options_panel.go b/pkg/gui/patch_options_panel.go
index b69d12d92..4ec3cd228 100644
--- a/pkg/gui/patch_options_panel.go
+++ b/pkg/gui/patch_options_panel.go
@@ -21,6 +21,10 @@ func (gui *Gui) handleCreatePatchOptionsMenu(g *gocui.Gui, v *gocui.View) error
 			onPress:       gui.handlePullPatchIntoWorkingTree,
 		},
 		{
+			displayString: "pull patch into new commit",
+			onPress:       gui.handlePullPatchIntoNewCommit,
+		},
+		{
 			displayString: "apply patch",
 			onPress:       func() error { return gui.handleApplyPatch(false) },
 		},
@@ -137,6 +141,22 @@ func (gui *Gui) handlePullPatchIntoWorkingTree() error {
 	}
 }
 
+func (gui *Gui) handlePullPatchIntoNewCommit() error {
+	if ok, err := gui.validateNormalWorkingTreeState(); !ok {
+		return err
+	}
+
+	if err := gui.returnFocusFromLineByLinePanelIfNecessary(); err != nil {
+		return err
+	}
+
+	return gui.WithWaitingStatus(gui.Tr.SLocalize("RebasingStatus"), func() error {
+		commitIndex := gui.getPatchCommitIndex()
+		err := gui.GitCommand.PullPatchIntoNewCommit(gui.State.Commits, commitIndex, gui.GitCommand.PatchManager)
+		return gui.handleGenericMergeCommandResult(err)
+	})
+}
+
 func (gui *Gui) handleApplyPatch(reverse bool) error {
 	if err := gui.returnFocusFromLineByLinePanelIfNecessary(); err != nil {
 		return err