Fix and improve the iris cmd according to this: https://github.com/kataras/iris/issues/506

iris/fs.go

@@ -0,0 +1,84 @@
+package main
+
+import (
+	"github.com/kataras/go-errors"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+var workingDir string
+
+func getWorkingDir() string {
+	if workingDir == "" {
+		errUnableToGetWD := errors.New(Name + ": Unable to get working directory, %s")
+		// set the current working dir
+		d, err := os.Getwd()
+		if err != nil {
+			panic(errUnableToGetWD.Format(err))
+		}
+		workingDir = d
+	}
+	return workingDir
+}
+
+var goPath string
+
+// returns the (last) gopath+"/src/"
+func getGoPath() string {
+	if goPath == "" {
+		errGoPathMissing := errors.New(Name + `: $GOPATH environment is missing. Please configure your $GOPATH. Reference:
+      https://github.com/golang/go/wiki/GOPATH`)
+
+		// set the gopath
+		goPath = os.Getenv("GOPATH")
+		if goPath == "" {
+			// we should panic here
+			panic(errGoPathMissing)
+		}
+
+		if idxLSep := strings.LastIndexByte(goPath, os.PathListSeparator); idxLSep == len(goPath)-1 {
+			// remove the last ';' or ':' in order to be safe to take the last correct path(if more than one )
+			goPath = goPath[0 : len(goPath)-2]
+		}
+		if idxLSep := strings.IndexByte(goPath, os.PathListSeparator); idxLSep != -1 {
+			// we have more than one user-defined gopaths
+			goPath = goPath[idxLSep+1:] // take the last
+		}
+	}
+
+	return join(goPath, "src")
+}
+
+const pathsep = string(os.PathSeparator)
+
+// it just replaces / or double slashes with os.PathSeparator
+// if second parameter receiver is true then it removes any ending slashes too
+func fromslash(s string) string {
+	if len(s) == 0 {
+		return ""
+	}
+
+	s = strings.Replace(s, "//", "/", -1)
+	s = strings.Replace(s, "/", pathsep, -1)
+
+	return s
+}
+
+func removeTrailingSlash(s string) string {
+	if s[len(s)-1] == os.PathSeparator {
+		s = s[0 : len(s)-2]
+	}
+	return s
+}
+
+func toslash(paths ...string) string {
+	s := join(paths...)
+	s = strings.Replace(s, pathsep, "/", -1)
+	return removeTrailingSlash(s)
+}
+
+// combine paths
+func join(paths ...string) string {
+	return removeTrailingSlash(fromslash(filepath.Join(paths...)))
+}