Add support to install tool via npm (#264)

pkg/os/apk/common.go

@@ -28,7 +28,7 @@ func (d *CommonInstaller) Install() (err error) {
 	return
 }
 
-// Uninstall uninstalls the Conntrack
+// Uninstall uninstalls the target package
 func (d *CommonInstaller) Uninstall() (err error) {
 	err = exec.RunCommand("apk", "del", d.Name)
 	return
@@ -40,13 +40,13 @@ func (d *CommonInstaller) WaitForStart() (ok bool, err error) {
 	return
 }
 
-// Start starts the Conntrack service
+// Start starts the target service
 func (d *CommonInstaller) Start() error {
 	fmt.Println("not supported yet")
 	return nil
 }
 
-// Stop stops the Conntrack service
+// Stop stops the target service
 func (d *CommonInstaller) Stop() error {
 	fmt.Println("not supported yet")
 	return nil

pkg/os/generic_installer.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"github.com/linuxsuren/http-downloader/pkg/os/apk"
 	"github.com/linuxsuren/http-downloader/pkg/os/dnf"
+	"github.com/linuxsuren/http-downloader/pkg/os/npm"
 	"github.com/linuxsuren/http-downloader/pkg/os/snap"
 	"io/ioutil"
 	"runtime"
@@ -94,6 +95,10 @@ func GenericInstallerRegistry(configFile string, registry core.InstallerRegistry
 			genericPackage.CommonInstaller = &dnf.CommonInstaller{
 				Name: genericPackage.Name,
 			}
+		case npm.NPMName:
+			genericPackage.CommonInstaller = &npm.CommonInstaller{
+				Name: genericPackage.Name,
+			}
 		default:
 			genericPackage.CommonInstaller = &generic.CommonInstaller{
 				Name: genericPackage.Name,

pkg/os/npm/common.go

@@ -0,0 +1,51 @@
+package npm
+
+import (
+	"fmt"
+	"github.com/linuxsuren/http-downloader/pkg/exec"
+)
+
+// NPMName is the name of npm
+const NPMName = "npm"
+
+// CommonInstaller is the installer of a common npm
+type CommonInstaller struct {
+	Name string
+}
+
+// Available check if support current platform
+func (d *CommonInstaller) Available() (ok bool) {
+	_, err := exec.LookPath("npm")
+	ok = err == nil
+	return
+}
+
+// Install installs the target package
+func (d *CommonInstaller) Install() (err error) {
+	err = exec.RunCommand("npm", "i", "-g", d.Name)
+	return
+}
+
+// Uninstall uninstalls the target package
+func (d *CommonInstaller) Uninstall() (err error) {
+	err = exec.RunCommand("npm", "uninstall", "-g", d.Name)
+	return
+}
+
+// WaitForStart waits for the service be started
+func (d *CommonInstaller) WaitForStart() (ok bool, err error) {
+	ok = true
+	return
+}
+
+// Start starts the target service
+func (d *CommonInstaller) Start() error {
+	fmt.Println("not supported yet")
+	return nil
+}
+
+// Stop stops the target service
+func (d *CommonInstaller) Stop() error {
+	fmt.Println("not supported yet")
+	return nil
+}