[windows] Better wails doctor diagnostics

v2/cmd/wails/internal/commands/doctor/doctor.go

@@ -68,7 +68,7 @@ func AddSubcommand(app *clir.Cli, w io.Writer) error {
 
 			name := dependency.Name
 			if dependency.Optional {
-				name += "*"
+				name = "*" + name
 				hasOptionalDependencies = true
 			}
 			packageName := "Unknown"
@@ -109,6 +109,7 @@ func AddSubcommand(app *clir.Cli, w io.Writer) error {
 			fmt.Fprintf(w, "* - Optional Dependency\n")
 		}
 		w.Flush()
+		logger.Println("")
 		logger.Println("Diagnosis")
 		logger.Println("---------")
 

v2/internal/system/system.go

@@ -3,6 +3,8 @@ package system
 import (
 	"github.com/wailsapp/wails/v2/internal/system/operatingsystem"
 	"github.com/wailsapp/wails/v2/internal/system/packagemanager"
+	"os/exec"
+	"strings"
 )
 
 // Info holds information about the current operating system,
@@ -24,3 +26,47 @@ func GetInfo() (*Info, error) {
 	}
 	return &result, nil
 }
+
+func checkNPM() *packagemanager.Dependancy {
+
+	// Check for npm
+	output, err := exec.Command("npm", "-version").Output()
+	installed := true
+	version := ""
+	if err != nil {
+		installed = false
+	} else {
+		version = strings.TrimSpace(strings.Split(string(output), "\n")[0])
+	}
+	return &packagemanager.Dependancy{
+		Name:           "npm ",
+		PackageName:    "N/A",
+		Installed:      installed,
+		InstallCommand: "Install from https://nodejs.org/en/download/",
+		Version:        version,
+		Optional:       false,
+		External:       false,
+	}
+}
+
+func checkUPX() *packagemanager.Dependancy {
+
+	// Check for npm
+	output, err := exec.Command("upx", "-V").Output()
+	installed := true
+	version := ""
+	if err != nil {
+		installed = false
+	} else {
+		version = strings.TrimSpace(strings.Split(string(output), "\n")[0])
+	}
+	return &packagemanager.Dependancy{
+		Name:           "upx ",
+		PackageName:    "N/A",
+		Installed:      installed,
+		InstallCommand: "Install from https://upx.github.io/",
+		Version:        version,
+		Optional:       true,
+		External:       false,
+	}
+}

v2/internal/system/system_windows.go

@@ -2,7 +2,12 @@
 
 package system
 
-import "github.com/wailsapp/wails/v2/internal/system/operatingsystem"
+import (
+	"github.com/wailsapp/wails/v2/internal/system/operatingsystem"
+	"github.com/wailsapp/wails/v2/internal/system/packagemanager"
+	"os/exec"
+	"strings"
+)
 
 func (i *Info) discover() error {
 
@@ -12,5 +17,28 @@ func (i *Info) discover() error {
 		return err
 	}
 	i.OS = osinfo
+
+	// Check for gcc
+	output, err := exec.Command("gcc", "--version").Output()
+	installed := true
+	version := ""
+	if err != nil {
+		installed = false
+	} else {
+		version = strings.TrimSpace(strings.Split(string(output), "\n")[0])
+	}
+	gccDependency := &packagemanager.Dependancy{
+		Name:           "gcc ",
+		PackageName:    "N/A",
+		Installed:      installed,
+		InstallCommand: "",
+		Version:        version,
+		Optional:       false,
+		External:       false,
+	}
+	i.Dependencies = append(i.Dependencies, gccDependency)
+	i.Dependencies = append(i.Dependencies, checkNPM())
+	i.Dependencies = append(i.Dependencies, checkUPX())
+
 	return nil
 }