refactor: first pass at rewriting apps plugin in go

plugins/apps/vendor/github.com/codeskyblue/go-sh/test.go

@@ -0,0 +1,64 @@
+package sh
+
+import (
+	"os"
+	"path/filepath"
+)
+
+func filetest(name string, modemask os.FileMode) (match bool, err error) {
+	fi, err := os.Stat(name)
+	if err != nil {
+		return
+	}
+	match = (fi.Mode() & modemask) == modemask
+	return
+}
+
+func (s *Session) pwd() string {
+	dir := string(s.dir)
+	if dir == "" {
+		dir, _ = os.Getwd()
+	}
+	return dir
+}
+
+func (s *Session) abspath(name string) string {
+	if filepath.IsAbs(name) {
+		return name
+	}
+	return filepath.Join(s.pwd(), name)
+}
+
+func init() {
+	//log.SetFlags(log.Lshortfile | log.LstdFlags)
+}
+
+// expression can be dir, file, link
+func (s *Session) Test(expression string, argument string) bool {
+	var err error
+	var fi os.FileInfo
+	fi, err = os.Lstat(s.abspath(argument))
+	switch expression {
+	case "d", "dir":
+		return err == nil && fi.IsDir()
+	case "f", "file":
+		return err == nil && fi.Mode().IsRegular()
+	case "x", "executable":
+		/*
+			fmt.Println(expression, argument)
+			if err == nil {
+				fmt.Println(fi.Mode())
+			}
+		*/
+		return err == nil && fi.Mode()&os.FileMode(0100) != 0
+	case "L", "link":
+		return err == nil && fi.Mode()&os.ModeSymlink != 0
+	}
+	return false
+}
+
+// expression can be d,dir, f,file, link
+func Test(exp string, arg string) bool {
+	s := NewSession()
+	return s.Test(exp, arg)
+}