Add sync command

2021-11-02 19:19:31 +01:00 · 2021-11-02 19:19:31 +01:00 · 5e6a5e23fd
commit 5e6a5e23fd
18 changed files with 1077 additions and 0 deletions
--- a/README.md
+++ b/README.md
@ -0,0 +1,39 @@
+# Git repositories manager
+
+Sync your repositories with single click
+
+## Usage
+
+Create a yaml file with the given structure
+
+```yaml
+# Place where your repositories should be saved
+workspace: ${HOME}/workspace 
+# List with repositories, that you want to manage with GRM
+repositories:
+- src: "git@github.com:Revalus/GitRepositoryManager.git"
+  name: GRM     # Optional, Uniq - if no name is specified, the repository will be treated as a name
+  dest: manager # Optional, Uniq - if no value is specified, name will be taken as destination 
+```
+
+### Note
+
+By default, the config file is searched for in `[HOME_DIR]./config/grm/config.yaml`.  
+
+## Commands and arguments
+
+### Global args
+
+| argument          | type   | default                              | Description                                                          |
+|-------------------|--------|--------------------------------------|----------------------------------------------------------------------|
+| -c, --config-file | string | `[HOME_DIR]./config/grm/config.yaml` | Path to configuration file, where the repositories must be specified |
+
+### Commands
+
+| command | Description |
+|---------|-------------|
+| sync    | Fetches changes from repositories or pulls a repository if one does not exist.
+
+## Changelog
+
+0.1 Add sync command - allow to fetch and clone repositories
--- a/app/app.go
+++ b/app/app.go
@ -0,0 +1,89 @@
+package app
+
+import (
+	"os"
+
+	"gitlab.com/revalus/grm/commands"
+	"gitlab.com/revalus/grm/config"
+)
+
+const (
+	APP_NAME        = "Git repository manager"
+	APP_DESCRIPTION = "Manage your repository with simple app"
+	VERSION         = "0.1"
+)
+
+type GitRepositoryManager struct {
+	cliArguments  config.CliArguments
+	configuration config.Configuration
+	console       ConsoleOutput
+}
+
+func (g *GitRepositoryManager) Parse(args []string) {
+	co := ConsoleOutput{}
+
+	checkCriticalError := func(err error) {
+		if err != nil {
+			co.ErrorfMsg("%v", err.Error())
+			os.Exit(2)
+		}
+	}
+
+	arguments, err := config.ParseCliArguments(APP_NAME, APP_DESCRIPTION, args)
+	checkCriticalError(err)
+
+	configFileContent, err := getFileContent(arguments.ConfigurationFile)
+	checkCriticalError(err)
+
+	fileExcension, err := getFileExcension(arguments.ConfigurationFile)
+	checkCriticalError(err)
+
+	configuration, err := config.GetRepositoryConfig(configFileContent, fileExcension)
+	checkCriticalError(err)
+	co.Color = arguments.Color
+
+	g.console = co
+	g.cliArguments = arguments
+	g.configuration = configuration
+}
+
+func (g *GitRepositoryManager) Run() {
+	if g.cliArguments.Sync {
+
+		g.console.InfoFMsg("Synchronizing repositories")
+		println()
+		sync := commands.NewSynchronizer(g.configuration.Workspace)
+		g.runCommand(sync)
+		println()
+		g.console.InfoFMsg("All repositories are synced")
+	}
+
+	if g.cliArguments.Version {
+		g.console.InfoFMsg("Current version: %v", VERSION)
+	}
+}
+
+func (g GitRepositoryManager) describeStatus(status commands.CommandStatus) {
+	if status.Error {
+		g.console.ErrorStatusF("Repository \"%v\": an error occurred: %v", status.Name, status.Message)
+		return
+	}
+
+	if status.Changed {
+		g.console.ChangedStatusF("Repository \"%v\": %v", status.Name, status.Message)
+	} else {
+		g.console.UnchangedStatusF("Repository \"%v\": %v", status.Name, status.Message)
+	}
+}
+
+func (g *GitRepositoryManager) runCommand(cmd commands.Command) {
+	statusChan := make(chan commands.CommandStatus)
+
+	for _, repo := range g.configuration.Repositories {
+		go cmd.Command(repo, statusChan)
+	}
+
+	for range g.configuration.Repositories {
+		g.describeStatus(<-statusChan)
+	}
+}
--- a/app/app_test.go
+++ b/app/app_test.go
@ -0,0 +1,94 @@
+package app
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"gitlab.com/revalus/grm/config"
+)
+
+func prepareConfigContent() (string, string) {
+	checkErrorDuringPreparation := func(err error) {
+		if err != nil {
+			fmt.Printf("Cannot prepare a temporary directory for testing! %v ", err.Error())
+			os.Exit(2)
+		}
+	}
+
+	baseTmp := fmt.Sprintf("%v/grmTest", os.TempDir())
+	if _, ok := os.Stat(baseTmp); ok != nil {
+		err := os.Mkdir(baseTmp, 0777)
+		checkErrorDuringPreparation(err)
+	}
+
+	tempDir, err := os.MkdirTemp(baseTmp, "*")
+	checkErrorDuringPreparation(err)
+
+	configFilePath := fmt.Sprintf("%v/config-file.yaml", tempDir)
+
+	file, err := os.Create(configFilePath)
+	checkErrorDuringPreparation(err)
+
+	defer file.Close()
+
+	yamlConfig := fmt.Sprintf(`
+workspace: %v
+repositories:
+  - src: "https://github.com/golang/example.git"`, tempDir)
+
+	_, err = file.WriteString(yamlConfig)
+
+	checkErrorDuringPreparation(err)
+	return tempDir, configFilePath
+}
+
+func TestParseApplication(t *testing.T) {
+	workdir, configFile := prepareConfigContent()
+	t.Cleanup(func() {
+		os.Remove(workdir)
+	})
+
+	args := []string{"custom-app", "sync", "-c", configFile}
+	grm := GitRepositoryManager{}
+	grm.Parse(args)
+
+	if workdir != grm.configuration.Workspace {
+		t.Errorf("Expected to get %v, instead of this got %v", workdir, grm.configuration.Repositories)
+	}
+
+	if !grm.cliArguments.Sync {
+		t.Error("The value of \"sync\" is expected to be true")
+	}
+
+	expectedRepo := config.RepositoryConfig{
+		Name: "example",
+		Src:  "https://github.com/golang/example.git",
+		Dest: "example",
+	}
+
+	if expectedRepo != grm.configuration.Repositories[0] {
+		t.Errorf("Expected to get %v, instead of this got %v", expectedRepo, grm.configuration.Repositories[0])
+	}
+
+}
+
+func Example_test_sync_output() {
+	grm := GitRepositoryManager{
+		configuration: config.Configuration{
+			Workspace: "/tmp",
+		},
+		cliArguments: config.CliArguments{
+			Sync:    true,
+			Version: true,
+		},
+		console: ConsoleOutput{
+			Color: false,
+		},
+	}
+	grm.Run()
+	// Output:
+	// Info: Synchronizing repositories
+	// Info: All repositories are synced
+	// Info: Current version: 0.1
+}
--- a/app/console_output.go
+++ b/app/console_output.go
@ -0,0 +1,61 @@
+package app
+
+import (
+	"fmt"
+)
+
+const (
+	colorReset  = "\033[0m"
+	colorRed    = "\033[31m"
+	colorGreen  = "\033[32m"
+	colorYellow = "\033[33m"
+	colorBlue   = "\033[34m"
+)
+
+type ConsoleOutput struct {
+	Color bool
+}
+
+func (co ConsoleOutput) ErrorfMsg(format string, a ...interface{}) {
+	msg := fmt.Sprintf(format, a...)
+	if co.Color {
+		msg = fmt.Sprintf("%vError:%v %v", colorRed, colorReset, msg)
+	} else {
+		msg = fmt.Sprintf("Error: %v", msg)
+	}
+	fmt.Println(msg)
+}
+
+func (co ConsoleOutput) InfoFMsg(format string, a ...interface{}) {
+	msg := fmt.Sprintf(format, a...)
+	if co.Color {
+		msg = fmt.Sprintf("%vInfo:%v %v", colorBlue, colorReset, msg)
+	} else {
+		msg = fmt.Sprintf("Info: %v", msg)
+	}
+	fmt.Println(msg)
+}
+
+func (co ConsoleOutput) UnchangedStatusF(format string, a ...interface{}) {
+	msg := fmt.Sprintf(format, a...)
+	if co.Color {
+		msg = fmt.Sprintf("%v%v", colorGreen, msg)
+	}
+	fmt.Println(msg)
+}
+
+func (co ConsoleOutput) ChangedStatusF(format string, a ...interface{}) {
+	msg := fmt.Sprintf(format, a...)
+	if co.Color {
+		msg = fmt.Sprintf("%v%v", colorYellow, msg)
+	}
+	fmt.Println(msg)
+}
+
+func (co ConsoleOutput) ErrorStatusF(format string, a ...interface{}) {
+	msg := fmt.Sprintf(format, a...)
+	if co.Color {
+		msg = fmt.Sprintf("%v%v", colorRed, msg)
+	}
+	fmt.Println(msg)
+}
--- a/app/utils.go
+++ b/app/utils.go
@ -0,0 +1,25 @@
+package app
+
+import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"strings"
+)
+
+func getFileContent(pathToFile string) ([]byte, error) {
+	return ioutil.ReadFile(pathToFile)
+}
+
+func getFileExcension(pathToFile string) (string, error) {
+	splittedFileName := strings.Split(pathToFile, ".")
+
+	if len(splittedFileName) == 1 {
+		msg := fmt.Sprintf("excension for file \"%v\", not found", splittedFileName)
+		return "", errors.New(msg)
+	}
+
+	fileExcension := splittedFileName[len(splittedFileName)-1]
+
+	return fileExcension, nil
+}
--- a/app/utils_test.go
+++ b/app/utils_test.go
@ -0,0 +1,36 @@
+package app
+
+import "testing"
+
+func TestGetFileExtension(t *testing.T) {
+
+	toTest := map[string]string{
+		"myYamlFile.yaml": "yaml",
+		"myTxtFile.txt":   "txt",
+		"myJsonFile.json": "json",
+	}
+
+	for key, value := range toTest {
+		result, err := getFileExcension(key)
+
+		if err != nil {
+			t.Errorf("Unexpected error: %v", err)
+		}
+
+		if result != value {
+			t.Errorf("Expected to get %v, instead of this got %v", value, result)
+		}
+
+	}
+
+}
+
+func TestErrorInGetExcensionFile(t *testing.T) {
+
+	result, err := getFileExcension("test")
+
+	if err == nil {
+		t.Errorf("Expected to get error, instead of this got result %v", result)
+	}
+
+}
--- a/commands/command.go
+++ b/commands/command.go
@ -0,0 +1,13 @@
+package commands
+
+import "gitlab.com/revalus/grm/config"
+
+type Command interface {
+	Command(repoCfg config.RepositoryConfig, cmdStatus chan CommandStatus)
+}
+type CommandStatus struct {
+	Name    string
+	Changed bool
+	Message string
+	Error   bool
+}
--- a/commands/sync_cmd.go
+++ b/commands/sync_cmd.go
@ -0,0 +1,88 @@
+package commands
+
+import (
+	"fmt"
+
+	"github.com/go-git/go-git/v5"
+	"gitlab.com/revalus/grm/config"
+)
+
+type Synchronizer struct {
+	workspace string
+}
+
+func NewSynchronizer(workspace string) Synchronizer {
+	return Synchronizer{
+		workspace: workspace,
+	}
+}
+
+const (
+	syncUpToDate = "up to date"
+	syncFetched  = "has been fetched" // Why fetched, instead of updated? To be consistent with git commands :D
+	syncCloned   = "has been cloned"
+)
+
+func fetchRepository(repo *git.Repository) (bool, error) {
+	err := repo.Fetch(&git.FetchOptions{})
+
+	if err == git.NoErrAlreadyUpToDate {
+		return false, nil
+	}
+
+	if err != nil && err != git.NoErrAlreadyUpToDate {
+		return false, err
+	}
+
+	return true, nil
+}
+
+func cloneRepository(destPath string, repoCfg *config.RepositoryConfig) (bool, error) {
+	_, err := git.PlainClone(destPath, false, &git.CloneOptions{
+		URL: repoCfg.Src,
+	})
+
+	if err != nil {
+		return false, err
+	}
+
+	return true, nil
+}
+
+func (s Synchronizer) Command(repoCfg config.RepositoryConfig, status chan CommandStatus) {
+	var err error
+
+	cmdStatus := CommandStatus{
+		Name:    repoCfg.Name,
+		Changed: false,
+		Message: "",
+		Error:   false,
+	}
+
+	destPath := fmt.Sprintf("%v/%v", s.workspace, repoCfg.Dest)
+	repo, err := git.PlainOpen(destPath)
+
+	if err != nil && err == git.ErrRepositoryNotExists {
+		cmdStatus.Changed, err = cloneRepository(destPath, &repoCfg)
+		cmdStatus.Message = syncCloned
+	} else if err == nil {
+		cmdStatus.Changed, err = fetchRepository(repo)
+		if cmdStatus.Changed {
+			cmdStatus.Message = syncFetched
+		} else {
+			cmdStatus.Message = syncUpToDate
+		}
+	} else {
+		cmdStatus.Error = true
+		cmdStatus.Message = err.Error()
+		status <- cmdStatus
+	}
+
+	if err != nil {
+		cmdStatus.Error = true
+		cmdStatus.Message = err.Error()
+	}
+
+	status <- cmdStatus
+
+}
--- a/commands/sync_cmd_test.go
+++ b/commands/sync_cmd_test.go
@ -0,0 +1,95 @@
+package commands
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"gitlab.com/revalus/grm/config"
+)
+
+func createTempDir() string {
+	checkErrorDuringPreparation := func(err error) {
+		if err != nil {
+			fmt.Printf("Cannot prepare a temporary directory for testing! %v ", err.Error())
+			os.Exit(2)
+		}
+	}
+
+	baseTmp := fmt.Sprintf("%v/grmTest", os.TempDir())
+	if _, ok := os.Stat(baseTmp); ok != nil {
+		err := os.Mkdir(baseTmp, 0777)
+		checkErrorDuringPreparation(err)
+	}
+	tempDir, err := os.MkdirTemp(baseTmp, "*")
+	checkErrorDuringPreparation(err)
+
+	return tempDir
+}
+
+func TestSyncInit(t *testing.T) {
+	sync := NewSynchronizer("test")
+	if sync.workspace != "test" {
+		t.Errorf("Expected to get \"test\", instead of this got %v", sync.workspace)
+	}
+}
+
+func TestSyncCommand(t *testing.T) {
+
+	workdir := createTempDir()
+	defer func() {
+		os.RemoveAll(workdir)
+	}()
+
+	sync := Synchronizer{
+		workspace: workdir,
+	}
+
+	cfg := config.RepositoryConfig{
+		Src:  "https://github.com/avelino/awesome-go",
+		Dest: "awesome-go",
+	}
+
+	ch := make(chan CommandStatus)
+
+	// Pull part
+	go sync.Command(cfg, ch)
+
+	cloneStatus := <-ch
+	if cloneStatus.Error {
+		t.Errorf("Unexpected error: %v", cloneStatus.Message)
+	}
+
+	info, err := os.Stat(fmt.Sprintf("%v/awesome-go/.git", workdir))
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err.Error())
+	}
+	if !info.IsDir() {
+		t.Errorf("Expected that the selected path is dir")
+	}
+
+	if cloneStatus.Changed != true {
+		t.Errorf("Expected that the status is changed")
+	}
+
+	if cloneStatus.Message != syncCloned {
+		t.Errorf("Expected to get %v, instead of this got %v", syncCloned, cloneStatus.Message)
+	}
+
+	// Fetch part
+	go sync.Command(cfg, ch)
+
+	fetchStatus := <-ch
+
+	if fetchStatus.Error {
+		t.Errorf("Unexpected error: %v", err.Error())
+	}
+
+	if fetchStatus.Changed != false {
+		t.Errorf("Expected that the status is not changed")
+	}
+
+	if fetchStatus.Message != syncUpToDate {
+		t.Errorf("Expected to get %v, instead of this got %v", syncUpToDate, cloneStatus.Message)
+	}
+}
--- a/config/cmd.go
+++ b/config/cmd.go
@ -0,0 +1,54 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/akamensky/argparse"
+)
+
+const (
+	defaultConfigPath = ".config/grm/config.yaml"
+)
+
+func getDefaultConfigDir() string {
+	// Only systems like Unix, Linux, and Windows systems are supported
+	userHomeDir, _ := os.UserHomeDir()
+	return fmt.Sprintf("%v/%v", userHomeDir, defaultConfigPath)
+}
+
+func ParseCliArguments(name, description string, arguments []string) (CliArguments, error) {
+
+	parser := argparse.NewParser(name, description)
+
+	syncCMD := parser.NewCommand("sync", "Synchronize repositories with remote branches, if the repository does not exist, clone it. (If pulling is not possible, the repository will be fetched)")
+
+	configFile := parser.String("c", "config-file", &argparse.Options{
+		Default: getDefaultConfigDir(),
+		Help:    "Path to the configuration file",
+	})
+
+	version := parser.Flag("v", "version", &argparse.Options{
+		Default: false,
+		Help:    "Print version",
+	})
+
+	color := parser.Flag("", "no-color", &argparse.Options{
+		Default: false,
+		Help:    "Turn off color printing",
+	})
+	if err := parser.Parse(arguments); err != nil {
+		return CliArguments{}, err
+	}
+	if !syncCMD.Happened() && !(*version) {
+		return CliArguments{}, errors.New(errNoCommand)
+	}
+
+	return CliArguments{
+		ConfigurationFile: *configFile,
+		Sync:              syncCMD.Happened(),
+		Version:           *version,
+		Color:             !(*color),
+	}, nil
+}
--- a/config/cmd_test.go
+++ b/config/cmd_test.go
@ -0,0 +1,51 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"testing"
+)
+
+func TestGetDefaultConfigDir(t *testing.T) {
+	ud, _ := os.UserHomeDir()
+
+	desiredPath := fmt.Sprintf("%v/%v", ud, defaultConfigPath)
+
+	if getDefaultConfigDir() != desiredPath {
+		t.Errorf("Expected to get %v, instead of this got %v", desiredPath, getDefaultConfigDir())
+	}
+
+}
+
+func TestParsingDefaultArguments(t *testing.T) {
+
+	// First item in os.Args is appPath, this have to be mocked
+	fakeOSArgs := []string{"appName", "sync"}
+
+	parseResult, err := ParseCliArguments("", "", fakeOSArgs)
+
+	if err != nil {
+		t.Errorf("Unexpected error %v", err.Error())
+	}
+
+	if parseResult.ConfigurationFile != getDefaultConfigDir() {
+		t.Errorf("Default value for configurationFile should be %v, instead of this got %v", getDefaultConfigDir(), parseResult.ConfigurationFile)
+	}
+
+	if parseResult.Sync != true {
+		t.Errorf("Default value for configurationFile should be %v, instead of this got %v", true, parseResult.Sync)
+	}
+}
+
+func TestParsingWithoutCommand(t *testing.T) {
+
+	// First item in os.Args is appPath, this have to be mocked
+	fakeOSArgs := []string{"appName"}
+
+	results, err := ParseCliArguments("", "", fakeOSArgs)
+
+	if err == nil {
+		t.Errorf("Expected error, not results: %v", results)
+	}
+
+}
--- a/config/config_file_parse.go
+++ b/config/config_file_parse.go
@ -0,0 +1,66 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	"gopkg.in/yaml.v3"
+)
+
+func GetRepositoryConfig(data []byte, fileExtension string) (Configuration, error) {
+
+	var config Configuration
+	var err error
+
+	switch fileExtension {
+	case "yaml":
+		err = yaml.Unmarshal(data, &config)
+	default:
+		return Configuration{}, errors.New(errNotSupportedType)
+	}
+
+	if err != nil {
+		return Configuration{}, err
+	}
+
+	if config.Workspace == "" {
+
+		return Configuration{}, errors.New(errMissingWorkspaceField)
+	}
+	// Get counters to check if name or dest values are not duplicated
+	nameFieldCounter := make(map[string][]int)
+	destFieldCounter := make(map[string][]int)
+
+	for index, repo := range config.Repositories {
+		if repo.Src == "" {
+			errorMessage := fmt.Sprintf(errMissingSrcField, index)
+			return Configuration{}, errors.New(errorMessage)
+		}
+		if repo.Name == "" {
+			splittedGit := strings.Split(repo.Src, "/")
+			nameWithExcention := splittedGit[len(splittedGit)-1]
+			name := strings.Split(nameWithExcention, ".")[0]
+			config.Repositories[index].Name = name
+		}
+		if repo.Dest == "" {
+			config.Repositories[index].Dest = config.Repositories[index].Name
+		}
+		nameFieldCounter[config.Repositories[index].Name] = append(nameFieldCounter[config.Repositories[index].Name], index)
+		destFieldCounter[config.Repositories[index].Dest] = append(destFieldCounter[config.Repositories[index].Dest], index)
+	}
+
+	for rowId, items := range nameFieldCounter {
+		if len(items) != 1 {
+			return Configuration{}, getDuplicateFieldError("name", rowId, items)
+		}
+	}
+
+	for rowId, items := range destFieldCounter {
+		if len(items) != 1 {
+			return Configuration{}, getDuplicateFieldError("dest", rowId, items)
+		}
+	}
+
+	return config, err
+}
--- a/config/config_file_parse_test.go
+++ b/config/config_file_parse_test.go
@ -0,0 +1,150 @@
+package config
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+)
+
+var exampleYamlConfig = []byte(`
+workspace: /tmp
+repositories:
+  - src: "https://github.com/example/example.git"
+    dest: "example/path"
+    name: "custom_example"
+  - src: https://github.com/example/example2.git
+`)
+
+var destinationConfiguration = Configuration{
+	Workspace: "/tmp",
+	Repositories: []RepositoryConfig{
+		{
+			Name: "custom_example",
+			Dest: "example/path",
+			Src:  "https://github.com/example/example.git",
+		},
+		{
+			Name: "example2",
+			Src:  "https://github.com/example/example2.git",
+			Dest: "example2",
+		},
+	},
+}
+
+func TestNotSupportedFileExcension(t *testing.T) {
+	_, err := GetRepositoryConfig(exampleYamlConfig, "custom")
+	if err == nil {
+		t.Error("Expected to get error")
+	}
+	if err.Error() != errNotSupportedType {
+		t.Errorf("Expected to get %v, instead of this got %v", errNotSupportedType, err.Error())
+	}
+}
+
+func TestGetRepositoryConfigFromYaml(t *testing.T) {
+
+	result, err := GetRepositoryConfig(exampleYamlConfig, "yaml")
+
+	if err != nil {
+		t.Errorf("Unexpected error %v", err.Error())
+	}
+
+	if !reflect.DeepEqual(result.Repositories, destinationConfiguration.Repositories) {
+		t.Errorf("Default value for configurationFile should be:\n %v \ninstead of this got:\n %v", result, destinationConfiguration)
+	}
+}
+
+func TestWrongYamlFormat(t *testing.T) {
+	exampleWrongYamlConfig := []byte(`---
+	workspace: "/test"
+repositories:
+  - src: "https://github.com/example/example.git"
+    dest: "example/path"
+    name: "custom_example"
+`)
+
+	_, err := GetRepositoryConfig(exampleWrongYamlConfig, "yaml")
+	expectedError := "yaml: line 2: found character that cannot start any token"
+	if err.Error() != expectedError {
+		t.Errorf("Expected to get error with value %v, instead of this got: %v", expectedError, err.Error())
+	}
+}
+
+func TestMissingWorkspaceRequiredField(t *testing.T) {
+	exampleWrongYamlConfig := []byte(`---
+repositories:
+  - src: "https://github.com/example/example.git"
+    dest: "example/path"
+    name: "custom_example"
+`)
+
+	_, err := GetRepositoryConfig(exampleWrongYamlConfig, "yaml")
+
+	if err.Error() != errMissingWorkspaceField {
+		t.Errorf("Expected to get error with value %v, instead of this got: %v", errMissingWorkspaceField, err.Error())
+	}
+}
+
+func TestMissingSourceRequiredField(t *testing.T) {
+	exampleWrongYamlConfig := []byte(`---
+workspace: /tmp
+repositories:
+  - dest: "example/path"
+    name: "custom_example"
+`)
+	_, err := GetRepositoryConfig(exampleWrongYamlConfig, "yaml")
+
+	expectedError := fmt.Sprintf(errMissingSrcField, 0)
+
+	if err.Error() != expectedError {
+		t.Errorf("Expected to get error with value %v, instead of this got: %v", expectedError, err.Error())
+	}
+}
+
+func TestDuplicatedNameField(t *testing.T) {
+	exampleWrongYamlConfig := []byte(`
+workspace: "/tmp"
+repositories:
+  - src: "https://github.com/example/example1.git"
+    dest: "example/path"
+    name: "custom_example"
+  - src: "https://github.com/example/example2.git"
+    name: "example2"
+  - src: "https://github.com/example/example2.git"
+`)
+	result, err := GetRepositoryConfig(exampleWrongYamlConfig, "yaml")
+
+	if err == nil {
+		t.Errorf("Unexpected result: %v", result)
+
+	}
+	expectedError := getDuplicateFieldError("name", "example2", []int{1, 2})
+
+	if err.Error() != expectedError.Error() {
+		t.Errorf("Expected to get error with value %v, instead of this got: %v", expectedError.Error(), err.Error())
+	}
+}
+
+func TestDuplicatedDestField(t *testing.T) {
+	exampleWrongYamlConfig := []byte(`
+workspace: "/tmp"
+repositories:
+  - src: "https://github.com/example/example1.git"
+    dest: "example/path"
+  - src: "https://github.com/example/example2.git"
+    dest: "example"
+  - src: "https://github.com/example/example3.git"
+    dest: "example"
+`)
+	result, err := GetRepositoryConfig(exampleWrongYamlConfig, "yaml")
+
+	if err == nil {
+		t.Errorf("Unexpected result: %v", result)
+	}
+
+	expectedError := getDuplicateFieldError("dest", "example", []int{1, 2})
+
+	if err.Error() != expectedError.Error() {
+		t.Errorf("Expected to get error with value \"%v\", instead of this got: \"%v\"", expectedError, err)
+	}
+}
--- a/config/errors.go
+++ b/config/errors.go
@ -0,0 +1,27 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+const (
+	errNoCommand             = "at least one command must be specified, use help to get commands"
+	errNotSupportedType      = "not supported configuration type"
+	errMissingWorkspaceField = "missing required \"workspace\" field"
+	errMissingSrcField       = "missing required field the \"src\" in row %v"
+)
+
+func getDuplicateFieldError(field string, name string, rows []int) error {
+
+	var rowsInString []string
+	for _, row := range rows {
+		rowsInString = append(rowsInString, strconv.Itoa(row))
+	}
+
+	errorMessage := fmt.Sprintf("The %v \"%v\" is duplicated in rows: %v", field, name, strings.Join(rowsInString, ","))
+
+	return errors.New(errorMessage)
+}
--- a/config/structures.go
+++ b/config/structures.go
@ -0,0 +1,19 @@
+package config
+
+type Configuration struct {
+	Workspace    string
+	Repositories []RepositoryConfig
+}
+
+type RepositoryConfig struct {
+	Name string `yaml:",omitempty"`
+	Src  string `yaml:",omitempty"`
+	Dest string `yaml:",omitempty"`
+}
+
+type CliArguments struct {
+	ConfigurationFile string
+	Sync              bool
+	Version           bool
+	Color             bool
+}
--- a/go.mod
+++ b/go.mod
@ -0,0 +1,30 @@
+module gitlab.com/revalus/grm
+
+go 1.17
+
+require (
+	github.com/akamensky/argparse v1.3.1
+	github.com/go-git/go-git/v5 v5.4.2
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
+)
+
+require (
+	github.com/Microsoft/go-winio v0.5.1 // indirect
+	github.com/ProtonMail/go-crypto v0.0.0-20210920160938-87db9fbc61c7 // indirect
+	github.com/acomagu/bufpipe v1.0.3 // indirect
+	github.com/emirpasic/gods v1.12.0 // indirect
+	github.com/go-git/gcfg v1.5.0 // indirect
+	github.com/go-git/go-billy/v5 v5.3.1 // indirect
+	github.com/google/go-cmp v0.5.6 // indirect
+	github.com/imdario/mergo v0.3.12 // indirect
+	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
+	github.com/kevinburke/ssh_config v1.1.0 // indirect
+	github.com/mitchellh/go-homedir v1.1.0 // indirect
+	github.com/sergi/go-diff v1.2.0 // indirect
+	github.com/xanzy/ssh-agent v0.3.1 // indirect
+	golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 // indirect
+	golang.org/x/net v0.0.0-20211101193420-4a448f8816b3 // indirect
+	golang.org/x/sys v0.0.0-20211102061401-a2f17f7b995c // indirect
+	gopkg.in/warnings.v0 v0.1.2 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+)
--- a/go.sum
+++ b/go.sum
@ -0,0 +1,124 @@
+github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
+github.com/Microsoft/go-winio v0.4.16/go.mod h1:XB6nPKklQyQ7GC9LdcBEcBl8PF76WugXOPRXwdLnMv0=
+github.com/Microsoft/go-winio v0.5.0/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
+github.com/Microsoft/go-winio v0.5.1 h1:aPJp2QD7OOrhO5tQXqQoGSJc+DjDtWTGLOmNyAm6FgY=
+github.com/Microsoft/go-winio v0.5.1/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
+github.com/ProtonMail/go-crypto v0.0.0-20210428141323-04723f9f07d7/go.mod h1:z4/9nQmJSSwwds7ejkxaJwO37dru3geImFUdJlaLzQo=
+github.com/ProtonMail/go-crypto v0.0.0-20210920160938-87db9fbc61c7 h1:DSqTh6nEes/uO8BlNcGk8PzZsxY2sN9ZL//veWBdTRI=
+github.com/ProtonMail/go-crypto v0.0.0-20210920160938-87db9fbc61c7/go.mod h1:z4/9nQmJSSwwds7ejkxaJwO37dru3geImFUdJlaLzQo=
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--- a/main.go
+++ b/main.go
@ -0,0 +1,16 @@
+package main
+
+import (
+	"os"
+
+	"gitlab.com/revalus/grm/app"
+)
+
+const ()
+
+func main() {
+
+	app := app.GitRepositoryManager{}
+	app.Parse(os.Args)
+	app.Run()
+}