Revert "towards moving config into context"

This reverts commit 7427716ea8.

github/config_encoder.go

@@ -0,0 +1,52 @@
+package github
+
+import (
+	"io"
+
+	"github.com/BurntSushi/toml"
+	"gopkg.in/yaml.v2"
+)
+
+type configEncoder interface {
+	Encode(w io.Writer, c *Config) error
+}
+
+type tomlConfigEncoder struct {
+}
+
+func (t *tomlConfigEncoder) Encode(w io.Writer, c *Config) error {
+	enc := toml.NewEncoder(w)
+	return enc.Encode(c)
+}
+
+type yamlConfigEncoder struct {
+}
+
+func (y *yamlConfigEncoder) Encode(w io.Writer, c *Config) error {
+	yc := yaml.MapSlice{}
+	for _, h := range c.Hosts {
+		yc = append(yc, yaml.MapItem{
+			Key: h.Host,
+			Value: []yamlHost{
+				{
+					User:       h.User,
+					OAuthToken: h.AccessToken,
+					Protocol:   h.Protocol,
+					UnixSocket: h.UnixSocket,
+				},
+			},
+		})
+	}
+
+	d, err := yaml.Marshal(yc)
+	if err != nil {
+		return err
+	}
+
+	n, err := w.Write(d)
+	if err == nil && n < len(d) {
+		err = io.ErrShortWrite
+	}
+
+	return err
+}