From b42202ea1c82d93d828fec38ddfdc073c041dec9 Mon Sep 17 00:00:00 2001
From: Jesse Duffield <jessedduffield@gmail.com>
Date: Sun, 17 Nov 2019 14:28:38 +1100
Subject: [PATCH] better fast forward

---
 pkg/commands/git.go       | 10 ++++------
 pkg/gui/branches_panel.go | 16 +++++++++++++---
 2 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/pkg/commands/git.go b/pkg/commands/git.go
index 912483b84..c2e12491d 100644
--- a/pkg/commands/git.go
+++ b/pkg/commands/git.go
@@ -272,12 +272,11 @@ func (c *GitCommand) ResetAndClean() error {
 }
 
 func (c *GitCommand) GetCurrentBranchUpstreamDifferenceCount() (string, string) {
-	return c.GetCommitDifferences("HEAD", "@{u}")
+	return c.GetCommitDifferences("HEAD", "HEAD@{u}")
 }
 
 func (c *GitCommand) GetBranchUpstreamDifferenceCount(branchName string) (string, string) {
-	upstream := "origin" // hardcoded for now
-	return c.GetCommitDifferences(branchName, fmt.Sprintf("%s/%s", upstream, branchName))
+	return c.GetCommitDifferences(branchName, branchName+"@{u}")
 }
 
 // GetCommitDifferences checks how many pushables/pullables there are for the
@@ -643,9 +642,8 @@ func (c *GitCommand) ApplyPatch(patch string, flags ...string) error {
 	return c.OSCommand.RunCommand(fmt.Sprintf("git apply %s %s", flagStr, c.OSCommand.Quote(filepath)))
 }
 
-func (c *GitCommand) FastForward(branchName string) error {
-	upstream := "origin" // hardcoding for now
-	return c.OSCommand.RunCommand(fmt.Sprintf("git fetch %s %s:%s", upstream, branchName, branchName))
+func (c *GitCommand) FastForward(branchName string, remoteName string, remoteBranchName string) error {
+	return c.OSCommand.RunCommand(fmt.Sprintf("git fetch %s %s:%s", remoteName, remoteBranchName, branchName))
 }
 
 func (c *GitCommand) RunSkipEditorCommand(command string) error {
diff --git a/pkg/gui/branches_panel.go b/pkg/gui/branches_panel.go
index c3fd37f26..28f16562a 100644
--- a/pkg/gui/branches_panel.go
+++ b/pkg/gui/branches_panel.go
@@ -342,17 +342,27 @@ func (gui *Gui) handleFastForward(g *gocui.Gui, v *gocui.View) error {
 	if branch.Pushables != "0" {
 		return gui.createErrorPanel(gui.g, gui.Tr.SLocalize("FwdCommitsToPush"))
 	}
-	upstream := "origin" // hardcoding for now
+
+	upstream, err := gui.GitCommand.GetUpstreamForBranch(branch.Name)
+	if err != nil {
+		return gui.createErrorPanel(gui.g, err.Error())
+	}
+
+	split := strings.Split(upstream, "/")
+	remoteName := split[0]
+	remoteBranchName := strings.Join(split[1:], "/")
+
 	message := gui.Tr.TemplateLocalize(
 		"Fetching",
 		Teml{
-			"from": fmt.Sprintf("%s/%s", upstream, branch.Name),
+			"from": fmt.Sprintf("%s/%s", remoteName, remoteBranchName),
 			"to":   branch.Name,
 		},
 	)
 	go func() {
 		_ = gui.createLoaderPanel(gui.g, v, message)
-		if err := gui.GitCommand.FastForward(branch.Name); err != nil {
+
+		if err := gui.GitCommand.FastForward(branch.Name, remoteName, remoteBranchName); err != nil {
 			_ = gui.createErrorPanel(gui.g, err.Error())
 		} else {
 			_ = gui.closeConfirmationPrompt(gui.g, true)