First import

write.go

@@ -0,0 +1,62 @@
+package conf
+
+import (
+	"os"
+	"io"
+	"bytes"
+)
+
+// WriteConfigFile saves the configuration representation to a file.
+// The desired file permissions must be passed as in os.Open.
+// The header is a string that is saved as a comment in the first line of the file.
+func (c *ConfigFile) WriteConfigFile(fname string, perm int, header string) (err os.Error) {
+	var file *os.File;
+
+	if file, err = os.Open(fname, os.O_WRONLY|os.O_CREAT|os.O_TRUNC, perm); err != nil {
+		return err
+	}
+	if err = c.Write(file, header); err != nil {
+		return err
+	}
+
+	return file.Close();
+}
+
+func (c *ConfigFile) WriteConfigBytes(header string) (config []byte) {
+	buf := bytes.NewBuffer(nil)
+	
+	c.Write(buf, header)
+	
+	return buf.Bytes()
+}
+
+func (c *ConfigFile) Write(writer io.Writer, header string) (err os.Error) {
+	buf := bytes.NewBuffer(nil)
+	
+	if header != "" {
+		if _, err = buf.WriteString("# " + header + "\n"); err != nil {
+			return err
+		}
+	}
+
+	for section, sectionmap := range c.data {
+		if section == DefaultSection && len(sectionmap) == 0 {
+			continue	// skip default section if empty
+		}
+		if _, err = buf.WriteString("[" + section + "]\n"); err != nil {
+			return err
+		}
+		for option, value := range sectionmap {
+			if _, err = buf.WriteString(option + "=" + value + "\n"); err != nil {
+				return err
+			}
+		}
+		if _, err = buf.WriteString("\n"); err != nil {
+			return err
+		}
+	}
+	
+	buf.WriteTo(writer)
+
+	return nil;
+}