feat: add WSL (Windows Subsystem for Linux) support (#21)

* Avoid using wine in WSL

* Fix errcheck and stylecheck errors

pkg/rcedit/rcedit.go

@@ -1,6 +1,7 @@
 package rcedit
 
 import (
+	"os"
 	"os/exec"
 	"path/filepath"
 	"runtime"
@@ -31,15 +32,24 @@ func editResources(args []string) error {
 		return err
 	}
 
-	if util.GetCurrentOs() == util.WINDOWS {
+	if util.GetCurrentOs() == util.WINDOWS || util.IsWSL() {
 		var rcEditExecutable string
 		if runtime.GOARCH == "amd64" {
 			rcEditExecutable = "rcedit-x64.exe"
 		} else {
 			rcEditExecutable = "rcedit-ia32.exe"
 		}
 
-		command := exec.Command(filepath.Join(winCodeSignPath, rcEditExecutable), args...)
+		rcEditPath := filepath.Join(winCodeSignPath, rcEditExecutable)
+
+		if util.IsWSL() {
+			err = os.Chmod(rcEditPath, 0755)
+			if err != nil {
+				return err
+			}
+		}
+
+		command := exec.Command(rcEditPath, args...)
 		_, err = util.Execute(command)
 		if err != nil {
 			return err

pkg/util/wsl.go

@@ -0,0 +1,59 @@
+package util
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os/exec"
+	"strings"
+)
+
+func IsWSL() bool {
+	if GetCurrentOs() != LINUX {
+		return false
+	}
+
+	release, err := getOSRelease()
+	if err != nil {
+		return false
+	}
+
+	if strings.Contains(strings.ToLower(release), "microsoft") {
+		return true
+	}
+
+	version, err := getProcVersion()
+	if err != nil {
+		return false
+	}
+
+	if strings.Contains(strings.ToLower(version), "microsoft") {
+		return true
+	}
+
+	return false
+}
+
+func getOSRelease() (string, error) {
+	cmd := exec.Command("uname","-r")
+
+	var out bytes.Buffer
+	var stderr bytes.Buffer
+	cmd.Stdout = &out
+	cmd.Stderr = &stderr
+
+	err := cmd.Run()
+	if err != nil {
+		return "", err
+	}
+
+	return out.String(), nil
+}
+
+func getProcVersion() (string, error) {
+	content, err := ioutil.ReadFile("/proc/version")
+	if err != nil {
+		return "", err
+	}
+
+	return string(content), nil
+}