Merge pull request #1006 from mcuadros/transactional-storage

storage: transactional, new storage with transactional capabilities

1 files changed, 50 insertions, 0 deletions

diff --git a/storage/transactional/config.go b/storage/transactional/config.go
new file mode 100644
index 0000000..4d8efe1
--- /dev/null
+++ b/storage/transactional/config.go
@@ -0,0 +1,50 @@
+package transactional
+
+import "gopkg.in/src-d/go-git.v4/config"
+
+// ConfigStorage implements the storer.ConfigStorage for the transactional package.
+type ConfigStorage struct {
+	config.ConfigStorer
+	temporal config.ConfigStorer
+
+	set bool
+}
+
+// NewConfigStorage returns a new ConfigStorer based on a base storer and a
+// temporal storer.
+func NewConfigStorage(s, temporal config.ConfigStorer) *ConfigStorage {
+	return &ConfigStorage{ConfigStorer: s, temporal: temporal}
+}
+
+// SetConfig honors the storer.ConfigStorer interface.
+func (c *ConfigStorage) SetConfig(cfg *config.Config) error {
+	if err := c.temporal.SetConfig(cfg); err != nil {
+		return err
+	}
+
+	c.set = true
+	return nil
+}
+
+// Config honors the storer.ConfigStorer interface.
+func (c *ConfigStorage) Config() (*config.Config, error) {
+	if !c.set {
+		return c.ConfigStorer.Config()
+	}
+
+	return c.temporal.Config()
+}
+
+// Commit it copies the config from the temporal storage into the base storage.
+func (c *ConfigStorage) Commit() error {
+	if !c.set {
+		return nil
+	}
+
+	cfg, err := c.temporal.Config()
+	if err != nil {
+		return err
+	}
+
+	return c.ConfigStorer.SetConfig(cfg)
+}