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-rw-r--r--common/config.go67
1 files changed, 67 insertions, 0 deletions
diff --git a/common/config.go b/common/config.go
new file mode 100644
index 000000000..23a902bc1
--- /dev/null
+++ b/common/config.go
@@ -0,0 +1,67 @@
+package common
+
+import (
+ "flag"
+ "fmt"
+ "os"
+
+ "github.com/rakyll/globalconf"
+)
+
+// Config struct
+type ConfigManager struct {
+ ExecPath string
+ Debug bool
+ Diff bool
+ DiffType string
+ Paranoia bool
+ VmType int
+
+ conf *globalconf.GlobalConf
+}
+
+// Read config
+//
+// Initialize Config from Config File
+func ReadConfig(ConfigFile string, Datadir string, EnvPrefix string) *ConfigManager {
+ if !FileExist(ConfigFile) {
+ // create ConfigFile if it does not exist, otherwise
+ // globalconf will panic when trying to persist flags.
+ fmt.Printf("config file '%s' doesn't exist, creating it\n", ConfigFile)
+ os.Create(ConfigFile)
+ }
+ g, err := globalconf.NewWithOptions(&globalconf.Options{
+ Filename: ConfigFile,
+ EnvPrefix: EnvPrefix,
+ })
+ if err != nil {
+ fmt.Println(err)
+ } else {
+ g.ParseAll()
+ }
+ cfg := &ConfigManager{ExecPath: Datadir, Debug: true, conf: g, Paranoia: true}
+ return cfg
+}
+
+// provides persistence for flags
+func (c *ConfigManager) Save(key string, value interface{}) {
+ f := &flag.Flag{Name: key, Value: newConfValue(value)}
+ c.conf.Set("", f)
+}
+
+func (c *ConfigManager) Delete(key string) {
+ c.conf.Delete("", key)
+}
+
+// private type implementing flag.Value
+type confValue struct {
+ value string
+}
+
+// generic constructor to allow persising non-string values directly
+func newConfValue(value interface{}) *confValue {
+ return &confValue{fmt.Sprintf("%v", value)}
+}
+
+func (self confValue) String() string { return self.value }
+func (self confValue) Set(s string) error { self.value = s; return nil }