factor out code from git.go

19 files changed, 1168 insertions, 1112 deletions

diff --git a/pkg/commands/branches.go b/pkg/commands/branches.go
new file mode 100644
index 000000000..2da076e3a
--- /dev/null
+++ b/pkg/commands/branches.go
@@ -0,0 +1,157 @@
+package commands
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+
+	"github.com/jesseduffield/lazygit/pkg/commands/oscommands"
+	"github.com/jesseduffield/lazygit/pkg/utils"
+)
+
+// NewBranch create new branch
+func (c *GitCommand) NewBranch(name string, base string) error {
+	return c.OSCommand.RunCommand("git checkout -b %s %s", name, base)
+}
+
+// CurrentBranchName get the current branch name and displayname.
+// the first returned string is the name and the second is the displayname
+// e.g. name is 123asdf and displayname is '(HEAD detached at 123asdf)'
+func (c *GitCommand) CurrentBranchName() (string, string, error) {
+	branchName, err := c.OSCommand.RunCommandWithOutput("git symbolic-ref --short HEAD")
+	if err == nil && branchName != "HEAD\n" {
+		trimmedBranchName := strings.TrimSpace(branchName)
+		return trimmedBranchName, trimmedBranchName, nil
+	}
+	output, err := c.OSCommand.RunCommandWithOutput("git branch --contains")
+	if err != nil {
+		return "", "", err
+	}
+	for _, line := range utils.SplitLines(output) {
+		re := regexp.MustCompile(CurrentBranchNameRegex)
+		match := re.FindStringSubmatch(line)
+		if len(match) > 0 {
+			branchName = match[1]
+			displayBranchName := match[0][2:]
+			return branchName, displayBranchName, nil
+		}
+	}
+	return "HEAD", "HEAD", nil
+}
+
+// DeleteBranch delete branch
+func (c *GitCommand) DeleteBranch(branch string, force bool) error {
+	command := "git branch -d"
+
+	if force {
+		command = "git branch -D"
+	}
+
+	return c.OSCommand.RunCommand("%s %s", command, branch)
+}
+
+// Checkout checks out a branch (or commit), with --force if you set the force arg to true
+type CheckoutOptions struct {
+	Force   bool
+	EnvVars []string
+}
+
+func (c *GitCommand) Checkout(branch string, options CheckoutOptions) error {
+	forceArg := ""
+	if options.Force {
+		forceArg = "--force "
+	}
+	return c.OSCommand.RunCommandWithOptions(fmt.Sprintf("git checkout %s %s", forceArg, branch), oscommands.RunCommandOptions{EnvVars: options.EnvVars})
+}
+
+// GetBranchGraph gets the color-formatted graph of the log for the given branch
+// Currently it limits the result to 100 commits, but when we get async stuff
+// working we can do lazy loading
+func (c *GitCommand) GetBranchGraph(branchName string) (string, error) {
+	cmdStr := c.GetBranchGraphCmdStr(branchName)
+	return c.OSCommand.RunCommandWithOutput(cmdStr)
+}
+
+func (c *GitCommand) GetUpstreamForBranch(branchName string) (string, error) {
+	output, err := c.OSCommand.RunCommandWithOutput("git rev-parse --abbrev-ref --symbolic-full-name %s@{u}", branchName)
+	return strings.TrimSpace(output), err
+}
+
+func (c *GitCommand) GetBranchGraphCmdStr(branchName string) string {
+	branchLogCmdTemplate := c.Config.GetUserConfig().GetString("git.branchLogCmd")
+	templateValues := map[string]string{
+		"branchName": branchName,
+	}
+	return utils.ResolvePlaceholderString(branchLogCmdTemplate, templateValues)
+}
+
+func (c *GitCommand) SetUpstreamBranch(upstream string) error {
+	return c.OSCommand.RunCommand("git branch -u %s", upstream)
+}
+
+func (c *GitCommand) SetBranchUpstream(remoteName string, remoteBranchName string, branchName string) error {
+	return c.OSCommand.RunCommand("git branch --set-upstream-to=%s/%s %s", remoteName, remoteBranchName, branchName)
+}
+
+func (c *GitCommand) GetCurrentBranchUpstreamDifferenceCount() (string, string) {
+	return c.GetCommitDifferences("HEAD", "HEAD@{u}")
+}
+
+func (c *GitCommand) GetBranchUpstreamDifferenceCount(branchName string) (string, string) {
+	return c.GetCommitDifferences(branchName, branchName+"@{u}")
+}
+
+// GetCommitDifferences checks how many pushables/pullables there are for the
+// current branch
+func (c *GitCommand) GetCommitDifferences(from, to string) (string, string) {
+	command := "git rev-list %s..%s --count"
+	pushableCount, err := c.OSCommand.RunCommandWithOutput(command, to, from)
+	if err != nil {
+		return "?", "?"
+	}
+	pullableCount, err := c.OSCommand.RunCommandWithOutput(command, from, to)
+	if err != nil {
+		return "?", "?"
+	}
+	return strings.TrimSpace(pushableCount), strings.TrimSpace(pullableCount)
+}
+
+type MergeOpts struct {
+	FastForwardOnly bool
+}
+
+// Merge merge
+func (c *GitCommand) Merge(branchName string, opts MergeOpts) error {
+	mergeArgs := c.Config.GetUserConfig().GetString("git.merging.args")
+
+	command := fmt.Sprintf("git merge --no-edit %s %s", mergeArgs, branchName)
+	if opts.FastForwardOnly {
+		command = fmt.Sprintf("%s --ff-only", command)
+	}
+
+	return c.OSCommand.RunCommand(command)
+}
+
+// AbortMerge abort merge
+func (c *GitCommand) AbortMerge() error {
+	return c.OSCommand.RunCommand("git merge --abort")
+}
+
+func (c *GitCommand) IsHeadDetached() bool {
+	err := c.OSCommand.RunCommand("git symbolic-ref -q HEAD")
+	return err != nil
+}
+
+// ResetHardHead runs `git reset --hard`
+func (c *GitCommand) ResetHard(ref string) error {
+	return c.OSCommand.RunCommand("git reset --hard " + ref)
+}
+
+// ResetSoft runs `git reset --soft HEAD`
+func (c *GitCommand) ResetSoft(ref string) error {
+	return c.OSCommand.RunCommand("git reset --soft " + ref)
+}
+
+func (c *GitCommand) RenameBranch(oldName string, newName string) error {
+	return c.OSCommand.RunCommand("git branch --move %s %s", oldName, newName)
+}
diff --git a/pkg/commands/commits.go b/pkg/commands/commits.go
new file mode 100644
index 000000000..7fc4cc2a9
--- /dev/null
+++ b/pkg/commands/commits.go
@@ -0,0 +1,93 @@
+package commands
+
+import (
+	"fmt"
+	"os/exec"
+	"strconv"
+	"strings"
+
+	"github.com/jesseduffield/lazygit/pkg/commands/oscommands"
+	"github.com/jesseduffield/lazygit/pkg/models"
+)
+
+// RenameCommit renames the topmost commit with the given name
+func (c *GitCommand) RenameCommit(name string) error {
+	return c.OSCommand.RunCommand("git commit --allow-empty --amend -m %s", c.OSCommand.Quote(name))
+}
+
+// ResetToCommit reset to commit
+func (c *GitCommand) ResetToCommit(sha string, strength string, options oscommands.RunCommandOptions) error {
+	return c.OSCommand.RunCommandWithOptions(fmt.Sprintf("git reset --%s %s", strength, sha), options)
+}
+
+// Commit commits to git
+func (c *GitCommand) Commit(message string, flags string) (*exec.Cmd, error) {
+	command := fmt.Sprintf("git commit %s -m %s", flags, strconv.Quote(message))
+	if c.usingGpg() {
+		return c.OSCommand.ShellCommandFromString(command), nil
+	}
+
+	return nil, c.OSCommand.RunCommand(command)
+}
+
+// Get the subject of the HEAD commit
+func (c *GitCommand) GetHeadCommitMessage() (string, error) {
+	cmdStr := "git log -1 --pretty=%s"
+	message, err := c.OSCommand.RunCommandWithOutput(cmdStr)
+	return strings.TrimSpace(message), err
+}
+
+func (c *GitCommand) GetCommitMessage(commitSha string) (string, error) {
+	cmdStr := "git rev-list --format=%B --max-count=1 " + commitSha
+	messageWithHeader, err := c.OSCommand.RunCommandWithOutput(cmdStr)
+	message := strings.Join(strings.SplitAfter(messageWithHeader, "\n")[1:], "\n")
+	return strings.TrimSpace(message), err
+}
+
+// AmendHead amends HEAD with whatever is staged in your working tree
+func (c *GitCommand) AmendHead() (*exec.Cmd, error) {
+	command := "git commit --amend --no-edit --allow-empty"
+	if c.usingGpg() {
+		return c.OSCommand.ShellCommandFromString(command), nil
+	}
+
+	return nil, c.OSCommand.RunCommand(command)
+}
+
+// PrepareCommitAmendSubProcess prepares a subprocess for `git commit --amend --allow-empty`
+func (c *GitCommand) PrepareCommitAmendSubProcess() *exec.Cmd {
+	return c.OSCommand.PrepareSubProcess("git", "commit", "--amend", "--allow-empty")
+}
+
+func (c *GitCommand) ShowCmdStr(sha string, filterPath string) string {
+	filterPathArg := ""
+	if filterPath != "" {
+		filterPathArg = fmt.Sprintf(" -- %s", c.OSCommand.Quote(filterPath))
+	}
+	return fmt.Sprintf("git show --submodule --color=%s --no-renames --stat -p %s %s", c.colorArg(), sha, filterPathArg)
+}
+
+// Revert reverts the selected commit by sha
+func (c *GitCommand) Revert(sha string) error {
+	return c.OSCommand.RunCommand("git revert %s", sha)
+}
+
+// CherryPickCommits begins an interactive rebase with the given shas being cherry picked onto HEAD
+func (c *GitCommand) CherryPickCommits(commits []*models.Commit) error {
+	todo := ""
+	for _, commit := range commits {
+		todo = "pick " + commit.Sha + " " + commit.Name + "\n" + todo
+	}
+
+	cmd, err := c.PrepareInteractiveRebaseCommand("HEAD", todo, false)
+	if err != nil {
+		return err
+	}
+
+	return c.OSCommand.RunPreparedCommand(cmd)
+}
+
+// CreateFixupCommit creates a commit that fixes up a previous commit
+func (c *GitCommand) CreateFixupCommit(sha string) error {
+	return c.OSCommand.RunCommand("git commit --fixup=%s", sha)
+}
diff --git a/pkg/commands/config.go b/pkg/commands/config.go
new file mode 100644
index 000000000..018de2724
--- /dev/null
+++ b/pkg/commands/config.go
@@ -0,0 +1,52 @@
+package commands
+
+import (
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/jesseduffield/lazygit/pkg/utils"
+)
+
+func (c *GitCommand) ConfiguredPager() string {
+	if os.Getenv("GIT_PAGER") != "" {
+		return os.Getenv("GIT_PAGER")
+	}
+	if os.Getenv("PAGER") != "" {
+		return os.Getenv("PAGER")
+	}
+	output, err := c.OSCommand.RunCommandWithOutput("git config --get-all core.pager")
+	if err != nil {
+		return ""
+	}
+	trimmedOutput := strings.TrimSpace(output)
+	return strings.Split(trimmedOutput, "\n")[0]
+}
+
+func (c *GitCommand) GetPager(width int) string {
+	useConfig := c.Config.GetUserConfig().GetBool("git.paging.useConfig")
+	if useConfig {
+		pager := c.ConfiguredPager()
+		return strings.Split(pager, "| less")[0]
+	}
+
+	templateValues := map[string]string{
+		"columnWidth": strconv.Itoa(width/2 - 6),
+	}
+
+	pagerTemplate := c.Config.GetUserConfig().GetString("git.paging.pager")
+	return utils.ResolvePlaceholderString(pagerTemplate, templateValues)
+}
+
+func (c *GitCommand) colorArg() string {
+	return c.Config.GetUserConfig().GetString("git.paging.colorArg")
+}
+
+func (c *GitCommand) GetConfigValue(key string) string {
+	output, err := c.OSCommand.RunCommandWithOutput("git config --get %s", key)
+	if err != nil {
+		// looks like this returns an error if there is no matching value which we're okay with
+		return ""
+	}
+	return strings.TrimSpace(output)
+}
diff --git a/pkg/commands/files.go b/pkg/commands/files.go
new file mode 100644
index 000000000..e52de446b
--- /dev/null
+++ b/pkg/commands/files.go
@@ -0,0 +1,270 @@
+package commands
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/go-errors/errors"
+	"github.com/jesseduffield/lazygit/pkg/models"
+	"github.com/jesseduffield/lazygit/pkg/utils"
+)
+
+// CatFile obtains the content of a file
+func (c *GitCommand) CatFile(fileName string) (string, error) {
+	return c.OSCommand.RunCommandWithOutput("%s %s", c.OSCommand.Platform.CatCmd, c.OSCommand.Quote(fileName))
+}
+
+// StageFile stages a file
+func (c *GitCommand) StageFile(fileName string) error {
+	// renamed files look like "file1 -> file2"
+	fileNames := strings.Split(fileName, " -> ")
+	return c.OSCommand.RunCommand("git add %s", c.OSCommand.Quote(fileNames[len(fileNames)-1]))
+}
+
+// StageAll stages all files
+func (c *GitCommand) StageAll() error {
+	return c.OSCommand.RunCommand("git add -A")
+}
+
+// UnstageAll stages all files
+func (c *GitCommand) UnstageAll() error {
+	return c.OSCommand.RunCommand("git reset")
+}
+
+// UnStageFile unstages a file
+func (c *GitCommand) UnStageFile(fileName string, tracked bool) error {
+	command := "git rm --cached %s"
+	if tracked {
+		command = "git reset HEAD %s"
+	}
+
+	// renamed files look like "file1 -> file2"
+	fileNames := strings.Split(fileName, " -> ")
+	for _, name := range fileNames {
+		if err := c.OSCommand.RunCommand(command, c.OSCommand.Quote(name)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (c *GitCommand) BeforeAndAfterFileForRename(file *models.File) (*models.File, *models.File, error) {
+
+	if !file.IsRename() {
+		return nil, nil, errors.New("Expected renamed file")
+	}
+
+	// we've got a file that represents a rename from one file to another. Unfortunately
+	// our File abstraction fails to consider this case, so here we will refetch
+	// all files, passing the --no-renames flag and then recursively call the function
+	// again for the before file and after file. At some point we should fix the abstraction itself
+
+	split := strings.Split(file.Name, " -> ")
+	filesWithoutRenames := c.GetStatusFiles(GetStatusFileOptions{NoRenames: true})
+	var beforeFile *models.File
+	var afterFile *models.File
+	for _, f := range filesWithoutRenames {
+		if f.Name == split[0] {
+			beforeFile = f
+		}
+		if f.Name == split[1] {
+			afterFile = f
+		}
+	}
+
+	if beforeFile == nil || afterFile == nil {
+		return nil, nil, errors.New("Could not find deleted file or new file for file rename")
+	}
+
+	if beforeFile.IsRename() || afterFile.IsRename() {
+		// probably won't happen but we want to ensure we don't get an infinite loop
+		return nil, nil, errors.New("Nested rename found")
+	}
+
+	return beforeFile, afterFile, nil
+}
+
+// DiscardAllFileChanges directly
+func (c *GitCommand) DiscardAllFileChanges(file *models.File) error {
+	if file.IsRename() {
+		beforeFile, afterFile, err := c.BeforeAndAfterFileForRename(file)
+		if err != nil {
+			return err
+		}
+
+		if err := c.DiscardAllFileChanges(beforeFile); err != nil {
+			return err
+		}
+
+		if err := c.DiscardAllFileChanges(afterFile); err != nil {
+			return err
+		}
+
+		return nil
+	}
+
+	// if the file isn't tracked, we assume you want to delete it
+	quotedFileName := c.OSCommand.Quote(file.Name)
+	if file.HasStagedChanges || file.HasMergeConflicts {
+		if err := c.OSCommand.RunCommand("git reset -- %s", quotedFileName); err != nil {
+			return err
+		}
+	}
+
+	if !file.Tracked {
+		return c.removeFile(file.Name)
+	}
+	return c.DiscardUnstagedFileChanges(file)
+}
+
+// DiscardUnstagedFileChanges directly
+func (c *GitCommand) DiscardUnstagedFileChanges(file *models.File) error {
+	quotedFileName := c.OSCommand.Quote(file.Name)
+	return c.OSCommand.RunCommand("git checkout -- %s", quotedFileName)
+}
+
+// Ignore adds a file to the gitignore for the repo
+func (c *GitCommand) Ignore(filename string) error {
+	return c.OSCommand.AppendLineToFile(".gitignore", filename)
+}
+
+// WorktreeFileDiff returns the diff of a file
+func (c *GitCommand) WorktreeFileDiff(file *models.File, plain bool, cached bool) string {
+	// for now we assume an error means the file was deleted
+	s, _ := c.OSCommand.RunCommandWithOutput(c.WorktreeFileDiffCmdStr(file, plain, cached))
+	return s
+}
+
+func (c *GitCommand) WorktreeFileDiffCmdStr(file *models.File, plain bool, cached bool) string {
+	cachedArg := ""
+	trackedArg := "--"
+	colorArg := c.colorArg()
+	split := strings.Split(file.Name, " -> ") // in case of a renamed file we get the new filename
+	fileName := c.OSCommand.Quote(split[len(split)-1])
+	if cached {
+		cachedArg = "--cached"
+	}
+	if !file.Tracked && !file.HasStagedChanges && !cached {
+		trackedArg = "--no-index /dev/null"
+	}
+	if plain {
+		colorArg = "never"
+	}
+
+	return fmt.Sprintf("git diff --submodule --no-ext-diff --color=%s %s %s %s", colorArg, cachedArg, trackedArg, fileName)
+}
+
+func (c *GitCommand) ApplyPatch(patch string, flags ...string) error {
+	filepath := filepath.Join(c.Config.GetUserConfigDir(), utils.GetCurrentRepoName(), time.Now().Format("Jan _2 15.04.05.000000000")+".patch")
+	c.Log.Infof("saving temporary patch to %s", filepath)
+	if err := c.OSCommand.CreateFileWithContent(filepath, patch); err != nil {
+		return err
+	}
+
+	flagStr := ""
+	for _, flag := range flags {
+		flagStr += " --" + flag
+	}
+
+	return c.OSCommand.RunCommand("git apply %s %s", flagStr, c.OSCommand.Quote(filepath))
+}
+
+// ShowFileDiff get the diff of specified from and to. Typically this will be used for a single commit so it'll be 123abc^..123abc
+// but when we're in diff mode it could be any 'from' to any 'to'. The reverse flag is also here thanks to diff mode.
+func (c *GitCommand) ShowFileDiff(from string, to string, reverse bool, fileName string, plain bool) (string, error) {
+	cmdStr := c.ShowFileDiffCmdStr(from, to, reverse, fileName, plain)
+	return c.OSCommand.RunCommandWithOutput(cmdStr)
+}
+
+func (c *GitCommand) ShowFileDiffCmdStr(from string, to string, reverse bool, fileName string, plain bool) string {
+	colorArg := c.colorArg()
+	if plain {
+		colorArg = "never"
+	}
+
+	reverseFlag := ""
+	if reverse {
+		reverseFlag = " -R "
+	}
+
+	return fmt.Sprintf("git diff --submodule --no-ext-diff --no-renames --color=%s %s %s %s -- %s", colorArg, from, to, reverseFlag, fileName)
+}
+
+// CheckoutFile checks out the file for the given commit
+func (c *GitCommand) CheckoutFile(commitSha, fileName string) error {
+	return c.OSCommand.RunCommand("git checkout %s %s", commitSha, fileName)
+}
+
+// DiscardOldFileChanges discards changes to a file from an old commit
+func (c *GitCommand) DiscardOldFileChanges(commits []*models.Commit, commitIndex int, fileName string) error {
+	if err := c.BeginInteractiveRebaseForCommit(commits, commitIndex); err != nil {
+		return err
+	}
+
+	// check if file exists in previous commit (this command returns an error if the file doesn't exist)
+	if err := c.OSCommand.RunCommand("git cat-file -e HEAD^:%s", fileName); err != nil {
+		if err := c.OSCommand.Remove(fileName); err != nil {
+			return err
+		}
+		if err := c.StageFile(fileName); err != nil {
+			return err
+		}
+	} else if err := c.CheckoutFile("HEAD^", fileName); err != nil {
+		return err
+	}
+
+	// amend the commit
+	cmd, err := c.AmendHead()
+	if cmd != nil {
+		return errors.New("received unexpected pointer to cmd")
+	}
+	if err != nil {
+		return err
+	}
+
+	// continue
+	return c.GenericMergeOrRebaseAction("rebase", "continue")
+}
+
+// DiscardAnyUnstagedFileChanges discards any unstages file changes via `git checkout -- .`
+func (c *GitCommand) DiscardAnyUnstagedFileChanges() error {
+	return c.OSCommand.RunCommand("git checkout -- .")
+}
+
+// RemoveTrackedFiles will delete the given file(s) even if they are currently tracked
+func (c *GitCommand) RemoveTrackedFiles(name string) error {
+	return c.OSCommand.RunCommand("git rm -r --cached %s", name)
+}
+
+// RemoveUntrackedFiles runs `git clean -fd`
+func (c *GitCommand) RemoveUntrackedFiles() error {
+	return c.OSCommand.RunCommand("git clean -fd")
+}
+
+// ResetAndClean removes all unstaged changes and removes all untracked files
+func (c *GitCommand) ResetAndClean() error {
+	submoduleConfigs, err := c.GetSubmoduleConfigs()
+	if err != nil {
+		return err
+	}
+
+	if len(submoduleConfigs) > 0 {
+		for _, config := range submoduleConfigs {
+			if err := c.SubmoduleStash(config); err != nil {
+				return err
+			}
+		}
+
+		if err := c.SubmoduleUpdateAll(); err != nil {
+			return err
+		}
+	}
+
+	if err := c.ResetHard("HEAD"); err != nil {
+		return err
+	}
+
+	return c.RemoveUntrackedFiles()
+}
diff --git a/pkg/commands/git.go b/pkg/commands/git.go
index 278b1d557..ab2819f75 100644
--- a/pkg/commands/git.go
+++ b/pkg/commands/git.go
@@ -1,17 +1,10 @@
 package commands
 
 import (
-	"fmt"
 	"io/ioutil"
 	"os"
-	"os/exec"
 	"path/filepath"
-	"regexp"
-	"strconv"
 	"strings"
-	"time"
-
-	"github.com/mgutz/str"
 
 	"github.com/go-errors/errors"
 
@@ -21,7 +14,6 @@ import (
 	"github.com/jesseduffield/lazygit/pkg/config"
 	"github.com/jesseduffield/lazygit/pkg/env"
 	"github.com/jesseduffield/lazygit/pkg/i18n"
-	"github.com/jesseduffield/lazygit/pkg/models"
 	"github.com/jesseduffield/lazygit/pkg/utils"
 	"github.com/sirupsen/logrus"
 	gitconfig "github.com/tcnksm/go-gitconfig"
@@ -33,83 +25,6 @@ import (
 // and returns '264fc6f5' as the second match
 const CurrentBranchNameRegex = `(?m)^\*.*?([^ ]*?)\)?$`
 
-func verifyInGitRepo(runCmd func(string, ...interface{}) error) error {
-	return runCmd("git status")
-}
-
-func navigateToRepoRootDirectory(stat func(string) (os.FileInfo, error), chdir func(string) error) error {
-	gitDir := env.GetGitDirEnv()
-	if gitDir != "" {
-		// we've been given the git directory explicitly so no need to navigate to it
-		_, err := stat(gitDir)
-		if err != nil {
-			return utils.WrapError(err)
-		}
-
-		return nil
-	}
-
-	// we haven't been given the git dir explicitly so we assume it's in the current working directory as `.git/` (or an ancestor directory)
-
-	for {
-		_, err := stat(".git")
-
-		if err == nil {
-			return nil
-		}
-
-		if !os.IsNotExist(err) {
-			return utils.WrapError(err)
-		}
-
-		if err = chdir(".."); err != nil {
-			return utils.WrapError(err)
-		}
-	}
-}
-
-// resolvePath takes a path containing a symlink and returns the true path
-func resolvePath(path string) (string, error) {
-	l, err := os.Lstat(path)
-	if err != nil {
-		return "", err
-	}
-
-	if l.Mode()&os.ModeSymlink == 0 {
-		return path, nil
-	}
-
-	return filepath.EvalSymlinks(path)
-}
-
-func setupRepository(openGitRepository func(string) (*gogit.Repository, error), sLocalize func(string) string) (*gogit.Repository, error) {
-	unresolvedPath := env.GetGitDirEnv()
-	if unresolvedPath == "" {
-		var err error
-		unresolvedPath, err = os.Getwd()
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	path, err := resolvePath(unresolvedPath)
-	if err != nil {
-		return nil, err
-	}
-
-	repository, err := openGitRepository(path)
-
-	if err != nil {
-		if strings.Contains(err.Error(), `unquoted '\' must be followed by new line`) {
-			return nil, errors.New(sLocalize("GitconfigParseErr"))
-		}
-
-		return nil, err
-	}
-
-	return repository, err
-}
-
 // GitCommand is our main git interface
 type GitCommand struct {
 	Log                  *logrus.Entry
@@ -176,1060 +91,104 @@ func NewGitCommand(log *logrus.Entry, osCommand *oscommands.OSCommand, tr *i18n.
 	return gitCommand, nil
 }
 
-func findDotGitDir(stat func(string) (os.FileInfo, error), readFile func(filename string) ([]byte, error)) (string, error) {
-	if env.GetGitDirEnv() != "" {
-		return env.GetGitDirEnv(), nil
-	}
-
-	f, err := stat(".git")
-	if err != nil {
-		return "", err
-	}
-
-	if f.IsDir() {
-		return ".git", nil
-	}
-
-	fileBytes, err := readFile(".git")
-	if err != nil {
-		return "", err
-	}
-	fileContent := string(fileBytes)
-	if !strings.HasPrefix(fileContent, "gitdir: ") {
-		return "", errors.New(".git is a file which suggests we are in a submodule but the file's contents do not contain a gitdir pointing to the actual .git directory")
-	}
-	return strings.TrimSpace(strings.TrimPrefix(fileContent, "gitdir: ")), nil
-}
-
-// GetStashEntryDiff stash diff
-func (c *GitCommand) ShowStashEntryCmdStr(index int) string {
-	return fmt.Sprintf("git stash show -p --stat --color=%s stash@{%d}", c.colorArg(), index)
-}
-
-// GetStatusFiles git status files
-type GetStatusFileOptions struct {
-	NoRenames bool
-}
-
-func (c *GitCommand) GetConfigValue(key string) string {
-	output, _ := c.OSCommand.RunCommandWithOutput("git config --get %s", key)
-	// looks like this returns an error if there is no matching value which we're okay with
-	return strings.TrimSpace(output)
-}
-
-// StashDo modify stash
-func (c *GitCommand) StashDo(index int, method string) error {
-	return c.OSCommand.RunCommand("git stash %s stash@{%d}", method, index)
-}
-
-// StashSave save stash
-// TODO: before calling this, check if there is anything to save
-func (c *GitCommand) StashSave(message string) error {
-	return c.OSCommand.RunCommand("git stash save %s", c.OSCommand.Quote(message))
-}
-
-func includesInt(list []int, a int) bool {
-	for _, b := range list {
-		if b == a {
-			return true
-		}
-	}
-	return false
+func verifyInGitRepo(runCmd func(string, ...interface{}) error) error {
+	return runCmd("git status")
 }
 
-// ResetAndClean removes all unstaged changes and removes all untracked files
-func (c *GitCommand) ResetAndClean() error {
-	submoduleConfigs, err := c.GetSubmoduleConfigs()
-	if err != nil {
-		return err
-	}
-
-	if len(submoduleConfigs) > 0 {
-		for _, config := range submoduleConfigs {
-			if err := c.SubmoduleStash(config); err != nil {
-				return err
-			}
-		}
-
-		if err := c.SubmoduleUpdateAll(); err != nil {
-			return err
+func navigateToRepoRootDirectory(stat func(string) (os.FileInfo, error), chdir func(string) error) error {
+	gitDir := env.GetGitDirEnv()
+	if gitDir != "" {
+		// we've been given the git directory explicitly so no need to navigate to it
+		_, err := stat(gitDir)
+		if err != nil {
+			return utils.WrapError(err)
 		}
-	}
-
-	if err := c.ResetHard("HEAD"); err != nil {
-		return err
-	}
-
-	return c.RemoveUntrackedFiles()
-}
-
-func (c *GitCommand) GetCurrentBranchUpstreamDifferenceCount() (string, string) {
-	return c.GetCommitDifferences("HEAD", "HEAD@{u}")
-}
-
-func (c *GitCommand) GetBranchUpstreamDifferenceCount(branchName string) (string, string) {
-	return c.GetCommitDifferences(branchName, branchName+"@{u}")
-}
-
-// GetCommitDifferences checks how many pushables/pullables there are for the
-// current branch
-func (c *GitCommand) GetCommitDifferences(from, to string) (string, string) {
-	command := "git rev-list %s..%s --count"
-	pushableCount, err := c.OSCommand.RunCommandWithOutput(command, to, from)
-	if err != nil {
-		return "?", "?"
-	}
-	pullableCount, err := c.OSCommand.RunCommandWithOutput(command, from, to)
-	if err != nil {
-		return "?", "?"
-	}
-	return strings.TrimSpace(pushableCount), strings.TrimSpace(pullableCount)
-}
-
-// RenameCommit renames the topmost commit with the given name
-func (c *GitCommand) RenameCommit(name string) error {
-	return c.OSCommand.RunCommand("git commit --allow-empty --amend -m %s", c.OSCommand.Quote(name))
-}
 
-// RebaseBranch interactive rebases onto a branch
-func (c *GitCommand) RebaseBranch(branchName string) error {
-	cmd, err := c.PrepareInteractiveRebaseCommand(branchName, "", false)
-	if err != nil {
-		return err
+		return nil
 	}
 
-	return c.OSCommand.RunPreparedCommand(cmd)
-}
-
-type FetchOptions struct {
-	PromptUserForCredential func(string) string
-	RemoteName              string
-	BranchName              string
-}
-
-// Fetch fetch git repo
-func (c *GitCommand) Fetch(opts FetchOptions) error {
-	command := "git fetch"
+	// we haven't been given the git dir explicitly so we assume it's in the current working directory as `.git/` (or an ancestor directory)
 
-	if opts.RemoteName != "" {
-		command = fmt.Sprintf("%s %s", command, opts.RemoteName)
-	}
-	if opts.BranchName != "" {
-		command = fmt.Sprintf("%s %s", command, opts.BranchName)
-	}
+	for {
+		_, err := stat(".git")
 
-	return c.OSCommand.DetectUnamePass(command, func(question string) string {
-		if opts.PromptUserForCredential != nil {
-			return opts.PromptUserForCredential(question)
+		if err == nil {
+			return nil
 		}
-		return "\n"</