Configuration: 1) Add scheme syntax support to Preset Meta; 2) Some wrong defaults has now been fixed

application/configuration/string.go

@@ -0,0 +1,60 @@
+package configuration
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// String represents a config string
+type String string
+
+// Parse parses current string and return the parsed result
+func (s String) Parse() (string, error) {
+	ss := string(s)
+
+	sSchemeLeadIdx := strings.Index(ss, "://")
+
+	if sSchemeLeadIdx < 0 {
+		return ss, nil
+	}
+
+	sSchemeLeadEnd := sSchemeLeadIdx + 3
+
+	switch strings.ToLower(ss[:sSchemeLeadIdx]) {
+	case "file":
+		fPath, e := filepath.Abs(ss[sSchemeLeadEnd:])
+
+		if e != nil {
+			return ss, e
+		}
+
+		f, e := os.Open(fPath)
+
+		if e != nil {
+			return "", fmt.Errorf("Unable to open %s: %s", fPath, e)
+		}
+
+		defer f.Close()
+
+		fData, e := ioutil.ReadAll(f)
+
+		if e != nil {
+			return "", fmt.Errorf("Unable to read from %s: %s", fPath, e)
+		}
+
+		return string(fData), nil
+
+	case "enviroment":
+		return os.Getenv(ss[sSchemeLeadEnd:]), nil
+
+	case "literal":
+		return ss[sSchemeLeadEnd:], nil
+
+	default:
+		return "", fmt.Errorf(
+			"Scheme \"%s\" was unsupported", ss[:sSchemeLeadIdx])
+	}
+}