Restrucure project in a way where it is more modular

22 files changed, 357 insertions, 58 deletions

diff --git a/main.go b/main.go
index aec4051bf..aa157c108 100644
--- a/main.go
+++ b/main.go
@@ -14,6 +14,8 @@ import (
 	"github.com/davecgh/go-spew/spew"
 
 	"github.com/jesseduffield/gocui"
+	"github.com/jesseduffield/lazygit/pkg/app"
+	"github.com/jesseduffield/lazygit/pkg/config"
 	git "gopkg.in/src-d/go-git.v4"
 )
 
@@ -24,8 +26,8 @@ var (
 
 	commit  string
 	version = "unversioned"
+	date    string
 
-	date          string
 	debuggingFlag = flag.Bool("debug", false, "a boolean")
 	versionFlag   = flag.Bool("v", false, "Print the current version")
 
@@ -77,15 +79,6 @@ func localLog(path string, objects ...interface{}) {
 	}
 }
 
-func navigateToRepoRootDirectory() {
-	_, err := os.Stat(".git")
-	for os.IsNotExist(err) {
-		devLog("going up a directory to find the root")
-		os.Chdir("..")
-		_, err = os.Stat(".git")
-	}
-}
-
 // when building the binary, `version` is set as a compile-time variable, along
 // with `date` and `commit`. If this program has been opened directly via go,
 // we will populate the `version` with VERSION in the lazygit root directory
@@ -112,7 +105,6 @@ func setupWorktree() {
 }
 
 func main() {
-	devLog("\n\n\n\n\n\n\n\n\n\n")
 	flag.Parse()
 	if version == "unversioned" {
 		version = fallbackVersion()
@@ -121,9 +113,22 @@ func main() {
 		fmt.Printf("commit=%s, build date=%s, version=%s", commit, date, version)
 		os.Exit(0)
 	}
-	verifyInGitRepo()
-	navigateToRepoRootDirectory()
+	appConfig := &config.AppConfig{
+		Name:      "lazygit",
+		Version:   version,
+		Commit:    commit,
+		BuildDate: date,
+		Debug:     *debuggingFlag,
+	}
+	app, err := app.NewApp(appConfig)
+	app.Log.Info(err)
+
+	app.GitCommand.SetupGit()
+	// TODO remove this once r, w not used
 	setupWorktree()
+
+	app.Gui.Run()
+
 	for {
 		if err := run(); err != nil {
 			if err == gocui.ErrQuit {
diff --git a/pkg/app/app.go b/pkg/app/app.go
new file mode 100644
index 000000000..726567b01
--- /dev/null
+++ b/pkg/app/app.go
@@ -0,0 +1,49 @@
+package app
+
+import (
+	"io"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/jesseduffield/lazygit/pkg/commands"
+	"github.com/jesseduffield/lazygit/pkg/config"
+)
+
+// App struct
+type App struct {
+	closers []io.Closer
+
+	Config     config.AppConfigurer
+	Log        *logrus.Logger
+	OSCommand  *commands.OSCommand
+	GitCommand *commands.GitCommand
+}
+
+// NewApp retruns a new applications
+func NewApp(config config.AppConfigurer) (*App, error) {
+	app := &App{
+		closers: []io.Closer{},
+		Config:  config,
+	}
+	var err error
+	app.Log = logrus.New()
+	app.OSCommand, err = commands.NewOSCommand(app.Log)
+	if err != nil {
+		return nil, err
+	}
+	app.GitCommand, err = commands.NewGitCommand(app.Log, app.OSCommand)
+	if err != nil {
+		return nil, err
+	}
+	return app, nil
+}
+
+// Close closes any resources
+func (app *App) Close() error {
+	for _, closer := range app.closers {
+		err := closer.Close()
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
diff --git a/pkg/commands/git.go b/pkg/commands/git.go
new file mode 100644
index 000000000..17855b98e
--- /dev/null
+++ b/pkg/commands/git.go
@@ -0,0 +1,71 @@
+package commands
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/Sirupsen/logrus"
+	git "gopkg.in/src-d/go-git.v4"
+)
+
+// GitCommand is our main git interface
+type GitCommand struct {
+	Log       *logrus.Logger
+	OSCommand *OSCommand
+	Worktree  *git.Worktree
+	Repo      *git.Repository
+}
+
+// NewGitCommand it runs git commands
+func NewGitCommand(log *logrus.Logger, osCommand *OSCommand) (*GitCommand, error) {
+	gitCommand := &GitCommand{
+		Log:       log,
+		OSCommand: osCommand,
+	}
+	return gitCommand, nil
+}
+
+// SetupGit sets git repo up
+func (c *GitCommand) SetupGit() {
+	c.verifyInGitRepo()
+	c.navigateToRepoRootDirectory()
+	c.setupWorktree()
+}
+
+func (c *GitCommand) GitIgnore(filename string) {
+	if _, err := c.OSCommand.RunDirectCommand("echo '" + filename + "' >> .gitignore"); err != nil {
+		panic(err)
+	}
+}
+
+func (c *GitCommand) verifyInGitRepo() {
+	if output, err := c.OSCommand.RunCommand("git status"); err != nil {
+		fmt.Println(output)
+		os.Exit(1)
+	}
+}
+
+func (c *GitCommand) navigateToRepoRootDirectory() {
+	_, err := os.Stat(".git")
+	for os.IsNotExist(err) {
+		c.Log.Debug("going up a directory to find the root")
+		os.Chdir("..")
+		_, err = os.Stat(".git")
+	}
+}
+
+func (c *GitCommand) setupWorktree() {
+	var err error
+	r, err := git.PlainOpen(".")
+	if err != nil {
+		panic(err)
+	}
+	c.Repo = r
+
+	w, err := r.Worktree()
+	c.Worktree = w
+	if err != nil {
+		panic(err)
+	}
+	c.Worktree = w
+}
diff --git a/gitcommands.go b/pkg/commands/gitcommands.go
index 14dee6dac..bdc23fef2 100644
--- a/gitcommands.go
+++ b/pkg/commands/gitcommands.go
@@ -21,33 +21,6 @@ var (
 	ErrNoOpenCommand = errors.New("Unsure what command to use to open this file")
 )
 
-// GitFile : A staged/unstaged file
-// TODO: decide whether to give all of these the Git prefix
-type GitFile struct {
-	Name               string
-	HasStagedChanges   bool
-	HasUnstagedChanges bool
-	Tracked            bool
-	Deleted            bool
-	HasMergeConflicts  bool
-	DisplayString      string
-}
-
-// Commit : A git commit
-type Commit struct {
-	Sha           string
-	Name          string
-	Pushed        bool
-	DisplayString string
-}
-
-// StashEntry : A git stash entry
-type StashEntry struct {
-	Index         int
-	Name          string
-	DisplayString string
-}
-
 // Map (from https://gobyexample.com/collection-functions)
 func Map(vs []string, f func(string) string) []string {
 	vsm := make([]string, len(vs))
diff --git a/pkg/commands/os.go b/pkg/commands/os.go
new file mode 100644
index 000000000..c36990aff
--- /dev/null
+++ b/pkg/commands/os.go
@@ -0,0 +1,77 @@
+package commands
+
+import (
+	"os/exec"
+	"runtime"
+	"strings"
+
+	"github.com/Sirupsen/logrus"
+)
+
+// Platform stores the os state
+type platform struct {
+	os           string
+	shell        string
+	shellArg     string
+	escapedQuote string
+}
+
+// OSCommand holds all the os commands
+type OSCommand struct {
+	Log      *logrus.Logger
+	Platform platform
+}
+
+// NewOSCommand os command runner
+func NewOSCommand(log *logrus.Logger) (*OSCommand, error) {
+	osCommand := &OSCommand{
+		Log:      log,
+		Platform: getPlatform(),
+	}
+	return osCommand, nil
+}
+
+// RunCommand wrapper around commands
+func (c *OSCommand) RunCommand(command string) (string, error) {
+	c.Log.WithField("command", command).Info("RunCommand")
+	splitCmd := strings.Split(command, " ")
+	cmdOut, err := exec.Command(splitCmd[0], splitCmd[1:]...).CombinedOutput()
+	return sanitisedCommandOutput(cmdOut, err)
+}
+
+// RunDirectCommand wrapper around direct commands
+func (c *OSCommand) RunDirectCommand(command string) (string, error) {
+	c.Log.WithField("command", command).Info("RunDirectCommand")
+
+	cmdOut, err := exec.
+		Command(c.Platform.shell, c.Platform.shellArg, command).
+		CombinedOutput()
+	return sanitisedCommandOutput(cmdOut, err)
+}
+
+func sanitisedCommandOutput(output []byte, err error) (string, error) {
+	outputString := string(output)
+	if outputString == "" && err != nil {
+		return err.Error(), err
+	}
+	return outputString, err
+}
+
+func getPlatform() platform {
+	switch runtime.GOOS {
+	case "windows":
+		return platform{
+			os:           "windows",
+			shell:        "cmd",
+			shellArg:     "/c",
+			escapedQuote: "\\\"",
+		}
+	default:
+		return platform{
+			os:           runtime.GOOS,
+			shell:        "bash",
+			shellArg:     "-c",
+			escapedQuote: "\"",
+		}
+	}
+}
diff --git a/pkg/config/app_config.go b/pkg/config/app_config.go
new file mode 100644
index 000000000..98e56dea2
--- /dev/null
+++ b/pkg/config/app_config.go
@@ -0,0 +1,45 @@
+package config
+
+// AppConfig contains the base configuration fields required for lazygit.
+type AppConfig struct {
+	Debug     bool   `long:"debug" env:"DEBUG" default:"false"`
+	Version   string `long:"version" env:"VERSION" default:"unversioned"`
+	Commit    string `long:"commit" env:"COMMIT"`
+	BuildDate string `long:"build-date" env:"BUILD_DATE"`
+	Name      string `long:"name" env:"NAME" default:"lazygit"`
+}
+
+// AppConfigurer interface allows individual app config structs to inherit Fields
+// from AppConfig and still be used by lazygit.
+type AppConfigurer interface {
+	GetDebug() bool
+	GetVersion() string
+	GetCommit() string
+	GetBuildDate() string
+	GetName() string
+}
+
+// GetDebug returns debug flag
+func (c *AppConfig) GetDebug() bool {
+	return c.Debug
+}
+
+// GetVersion returns debug flag
+func (c *AppConfig) GetVersion() string {
+	return c.Version
+}
+
+// GetCommit returns debug flag
+func (c *AppConfig) GetCommit() string {
+	return c.Commit
+}
+
+// GetBuildDate returns debug flag
+func (c *AppConfig) GetBuildDate() string {
+	return c.BuildDate
+}
+
+// GetName returns debug flag
+func (c *AppConfig) GetName() string {
+	return c.Name
+}
diff --git a/branch.go b/pkg/git/branch.go
index 78c2e55aa..e0fd75a73 100644
--- a/branch.go
+++ b/pkg/git/branch.go
@@ -1,4 +1,4 @@
-package main
+package git
 
 import (
 	"strings"
@@ -12,11 +12,13 @@ type Branch struct {
 	Recency string
 }
 
-func (b *Branch) getDisplayString() string {
-	return withPadding(b.Recency, 4) + coloredString(b.Name, b.getColor())
-}
+// GetDisplayString returns the dispaly string of branch
+// func (b *Branch) GetDisplayString() string {
+// 	return gui.withPadding(b.Recency, 4) + gui.coloredString(b.Name, b.getColor())
+// }
 
-func (b *Branch) getColor() color.Attribute {
+// GetColor branch color
+func (b *Branch) GetColor() color.Attribute {
 	switch b.getType() {
 	case "feature":
 		return color.FgGreen
diff --git a/branch_list_builder.go b/pkg/git/branch_list_builder.go
index 1d4dc338d..1abf11fcc 100644
--- a/branch_list_builder.go
+++ b/pkg/git/branch_list_builder.go
@@ -1,4 +1,4 @@
-package main
+package git
 
 import (
 	"regexp"
diff --git a/pkg/git/git_structs.go b/pkg/git/git_structs.go
new file mode 100644
index 000000000..711f25f4b
--- /dev/null
+++ b/pkg/git/git_structs.go
@@ -0,0 +1,28 @@
+package git
+
+// File : A staged/unstaged file
+// TODO: decide whether to give all of these the Git prefix
+type File struct {
+	Name               string
+	HasStagedChanges   bool
+	HasUnstagedChanges bool
+	Tracked            bool
+	Deleted            bool
+	HasMergeConflicts  bool
+	DisplayString      string
+}
+
+// Commit : A git commit
+type Commit struct {
+	Sha           string
+	Name          string
+	Pushed        bool
+	DisplayString string
+}
+
+// StashEntry : A git stash entry
+type StashEntry struct {
+	Index         int
+	Name          string
+	DisplayString string
+}
diff --git a/gui.go b/pkg/gui/gui.go
index 589dabea3..f35a4811f 100644
--- a/gui.go
+++ b/pkg/gui/gui.go
@@ -1,4 +1,4 @@
-package main
+package gui
 
 import (
 
@@ -13,16 +13,17 @@ import (
 
 	"github.com/golang-collections/collections/stack"
 	"github.com/jesseduffield/gocui"
+	"github.com/jesseduffield/lazygit/pkg/git"
 )
 
 // OverlappingEdges determines if panel edges overlap
 var OverlappingEdges = false
 
 type stateType struct {
-	GitFiles          []GitFile
-	Branches          []Branch
-	Commits           []Commit
-	StashEntries      []StashEntry
+	GitFiles          []git.File
+	Branches          []git.Branch
+	Commits           []git.Commit
+	StashEntries      []git.StashEntry
 	PreviousView      string
 	HasMergeConflicts bool
 	ConflictIndex     int
diff --git a/keybindings.go b/pkg/gui/keybindings.go
index afaa09527..23f320ceb 100644
--- a/keybindings.go
+++ b/pkg/gui/keybindings.go
@@ -1,4 +1,4 @@
-package main
+package gui
 
 import "github.com/jesseduffield/gocui"
 
diff --git a/branches_panel.go b/pkg/gui/panels/branches_panel.go
index a73d28bb3..a73d28bb3 100644
--- a/branches_panel.go
+++ b/pkg/gui/panels/branches_panel.go
diff --git a/commit_message_panel.go b/pkg/gui/panels/commit_message_panel.go
index baef870cf..baef870cf 100644
--- a/commit_message_panel.go
+++ b/pkg/gui/panels/commit_message_panel.go
diff --git a/commits_panel.go b/pkg/gui/panels/commits_panel.go
index 1a9976ffe..1a9976ffe 100644
--- a/commits_panel.go
+++ b/pkg/gui/panels/commits_panel.go
diff --git a/confirmation_panel.go b/pkg/gui/panels/confirmation_panel.go
index a8719d237..a8719d237 100644
--- a/confirmation_panel.go
+++ b/pkg/gui/panels/confirmation_panel.go
diff --git a/files_panel.go b/pkg/gui/panels/files_panel.go
index 4de8caca7..4de8caca7 100644
--- a/files_panel.go
+++ b/pkg/gui/panels/files_panel.go
diff --git a/merge_panel.go b/pkg/gui/panels/merge_panel.go
index f5ca12a23..f5ca12a23 100644
--- a/merge_panel.go
+++ b/pkg/gui/panels/merge_panel.go
diff --git a/stash_panel.go b/pkg/gui/panels/stash_panel.go
index 33c7e297b..33c7e297b 100644
--- a/stash_panel.go
+++ b/pkg/gui/panels/stash_panel.go
diff --git a/status_panel.go b/pkg/gui/panels/status_panel.go
index f3fcb8078..f3fcb8078 100644
--- a/status_panel.go
+++ b/pkg/gui/panels/status_panel.go
diff --git a/view_helpers.go b/pkg/gui/view_helpers.go
index b28e84efb..fc252a25c 100644
--- a/view_helpers.go
+++ b/pkg/gui/view_helpers.go
@@ -1,4 +1,4 @@
-package main
+package gui
 
 import (
 	"fmt"
@@ -233,3 +233,7 @@ func getCommitMessageView(g *gocui.Gui) *gocui.View {
 	v, _ := g.View("commitMessage")
 	return v
 }
+
+func trimmedContent(v *gocui.View) string {
+	return strings.TrimSpace(v.Buffer())
+}
diff --git a/pkg/utils/utils.go b/pkg/utils/utils.go
new file mode 100644
index 000000000..01556ea4f
--- /dev/null
+++ b/pkg/utils/utils.go
@@ -0,0 +1,49 @@
+package utils
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/fatih/color"
+)
+
+func splitLines(multilineString string) []string {
+	multilineString = strings.Replace(multilineString, "\r", "", -1)
+	if multilineString == "" || multilineString == "\n" {
+		return make([]string, 0)
+	}
+	lines := strings.Split(multilineString, "\n")
+	if lines[len(lines)-1] == "" {
+		return lines[:len(lines)-1]
+	}
+	return lines
+}
+
+func withPadding(str string, padding int) string {
+	if padding-len(str) < 0 {
+		return str
+	}
+	return str + strings.Repeat(" ", padding-len(str))
+}
+
+func coloredString(str string, colorAttribute color.Attribute) string {
+	colour := color.New(colorAttribute)
+	return coloredStringDirect(str, colour)
+}
+
+// used for aggregating a few color attributes rather than just sending a single one
+func coloredStringDirect(str string, colour *color.Color) string {
+	return colour.SprintFunc()(fmt.Sprint(str))
+}
+
+// used to get the project name
+func getCurrentProject() string {
+	pwd, err := os.Getwd()
+	if err != nil {
+		log.Fatalln(err.Error())
+	}
+	return filepath.Base(pwd)
+}
diff --git a/utils.go b/utils.go
index e2de46233..df7d04818 100644
--- a/utils.go
+++ b/utils.go
@@ -8,7 +8,6 @@ import (
 	"strings"
 
 	"github.com/fatih/color"
-	"github.com/jesseduffield/gocui"
 )
 
 func splitLines(multilineString string) []string {
@@ -23,10 +22,6 @@ func splitLines(multilineString string) []string {
 	return lines
 }
 
-func trimmedContent(v *gocui.View) string {
-	return strings.TrimSpace(v.Buffer())
-}
-
 func withPadding(str string, padding int) string {
 	if padding-len(str) < 0 {
 		return str