feat(dependency): Add git andd handle dependency th cannot be installed by the app

helpers/dependencies/git.go

@@ -0,0 +1,109 @@
+package dependencies
+
+import (
+	"os/exec"
+
+	"github.com/juju/errors"
+
+	log "github.com/sirupsen/logrus"
+)
+
+type Git struct{}
+
+// regroup all git dependencies function
+
+// GetName
+func (g Git) GetName() string {
+	return "Git"
+}
+
+// GetMinimumVersion
+func (g Git) GetMinimumVersion() string {
+	return "0.0.0"
+}
+
+// IsInstalled
+func (g Git) IsInstalled() (bool, error) {
+
+	_, err := g.GetBinaryPath()
+	if err != nil && !errors.Is(err, exec.ErrNotFound) {
+		return false, errors.Trace(err)
+	} else if err != nil && errors.Is(err, exec.ErrNotFound) {
+		return false, nil
+	}
+
+	return true, nil
+}
+
+// GetBinaryPath
+func (g Git) GetBinaryPath() (string, error) {
+	log.Debug("looking for git binary")
+
+	path, err := exec.LookPath("git")
+	if err != nil {
+		return "", errors.Trace(err)
+	}
+
+	log.Debug("found git binary in", path)
+
+	return path, nil
+}
+
+// GetVersion
+func (g Git) GetVersion() (string, error) {
+
+	isInstalled, err := g.IsInstalled()
+	if err != nil {
+		return "", errors.Trace(err)
+	}
+
+	if !isInstalled {
+		return "", errors.NotFoundf("git is not installed on the system")
+	}
+
+	return "0.0.0", nil
+}
+
+// IsVersionSupported
+func (g Git) IsVersionSupported() (bool, error) {
+
+	isInstalled, err := g.IsInstalled()
+	if err != nil {
+		return false, errors.Trace(err)
+	}
+	if !isInstalled {
+		return false, nil
+	}
+
+	return true, nil
+}
+
+// CanBeInstalled
+func (g Git) CanBeInstalled() bool {
+	return false
+}
+
+// DescribeInstall
+func (g Git) DescribeInstall(path string) string {
+	return ""
+}
+
+// Install
+func (g Git) Install(path string) error {
+	return nil
+}
+
+// DescribePostInstall
+func (g Git) DescribePostInstall(path string) string {
+	return ""
+}
+
+// PostInstall
+func (g Git) PostInstall(path string) error {
+	return nil
+}
+
+// GetInstallDirectory
+func (g Git) GetInstallDirectory() (string, error) {
+	return "", nil
+}

helpers/dependencies/golang.go

@@ -128,13 +128,18 @@ func (g Golang) IsVersionSupported() (bool, error) {
 		return false, errors.Trace(err)
 	}
 
-	if installedVersion.LT(*&requiredVersion) {
+	if installedVersion.LT(requiredVersion) {
 		return false, nil
 	}
 
 	return true, nil
 }
 
+// CanBeInstalled
+func (g Golang) CanBeInstalled() bool {
+	return true
+}
+
 // DescribeInstall
 func (g Golang) DescribeInstall(path string) string {
 

helpers/dependencies/interface.go

@@ -2,6 +2,7 @@ package dependencies
 
 // Dependency
 type Dependency interface {
+	CanBeInstalled() bool
 	DescribeInstall(path string) string
 	DescribePostInstall(path string) string
 	GetBinaryPath() (string, error)

helpers/dependencies/swagger.go

@@ -127,13 +127,18 @@ func (s Swagger) IsVersionSupported() (bool, error) {
 		return false, errors.Trace(err)
 	}
 
-	if installedVersion.LT(*&requiredVersion) {
+	if installedVersion.LT(requiredVersion) {
 		return false, nil
 	}
 
 	return true, nil
 }
 
+// CanBeInstalled
+func (s Swagger) CanBeInstalled() bool {
+	return true
+}
+
 // DescribeInstall
 func (s Swagger) DescribeInstall(path string) string {