style(repo): repo.Interface -> repo.Repo

The pkg.Interface style is modeled after heap.Interface. Generally, I
find it helpful for interfaces that have many implementations. It
provides clear distinction between the generic interface and the |n|
implementations that implement it (which may be interface types
themselves).

For clients who cannot keep the repo name, one can imagine that the most
likely rename is `ipfsrepo`. In that case, `ipfsrepo.Interface` remains
meaningful.

This is low-pri so it doesn't matter than much. But for the record, the
repo.Interface feels appropriate in this use-case.

core/commands/bootstrap.go

@@ -228,7 +228,7 @@ func bootstrapWritePeers(w io.Writer, prefix string, peers []config.BootstrapPee
 	return nil
 }
 
-func bootstrapAdd(r repo.Interface, cfg *config.Config, peers []config.BootstrapPeer) ([]config.BootstrapPeer, error) {
+func bootstrapAdd(r repo.Repo, cfg *config.Config, peers []config.BootstrapPeer) ([]config.BootstrapPeer, error) {
 	added := make([]config.BootstrapPeer, 0, len(peers))
 
 	for _, peer := range peers {
@@ -253,7 +253,7 @@ func bootstrapAdd(r repo.Interface, cfg *config.Config, peers []config.Bootstrap
 	return added, nil
 }
 
-func bootstrapRemove(r repo.Interface, cfg *config.Config, toRemove []config.BootstrapPeer) ([]config.BootstrapPeer, error) {
+func bootstrapRemove(r repo.Repo, cfg *config.Config, toRemove []config.BootstrapPeer) ([]config.BootstrapPeer, error) {
 	removed := make([]config.BootstrapPeer, 0, len(toRemove))
 	keep := make([]config.BootstrapPeer, 0, len(cfg.Bootstrap))
 
@@ -280,7 +280,7 @@ func bootstrapRemove(r repo.Interface, cfg *config.Config, toRemove []config.Boo
 	return removed, nil
 }
 
-func bootstrapRemoveAll(r repo.Interface, cfg *config.Config) ([]config.BootstrapPeer, error) {
+func bootstrapRemoveAll(r repo.Repo, cfg *config.Config) ([]config.BootstrapPeer, error) {
 	removed := make([]config.BootstrapPeer, len(cfg.Bootstrap))
 	copy(removed, cfg.Bootstrap)
 

core/commands/config.go

@@ -143,7 +143,7 @@ variable set to your preferred text editor.
 	},
 }
 
-func getConfig(r repo.Interface, key string) (*ConfigField, error) {
+func getConfig(r repo.Repo, key string) (*ConfigField, error) {
 	value, err := r.GetConfigKey(key)
 	if err != nil {
 		return nil, fmt.Errorf("Failed to get config value: %s", err)
@@ -154,7 +154,7 @@ func getConfig(r repo.Interface, key string) (*ConfigField, error) {
 	}, nil
 }
 
-func setConfig(r repo.Interface, key, value string) (*ConfigField, error) {
+func setConfig(r repo.Repo, key, value string) (*ConfigField, error) {
 	err := r.SetConfigKey(key, value)
 	if err != nil {
 		return nil, fmt.Errorf("Failed to set config value: %s", err)

repo/fsrepo/fsrepo.go

@@ -222,7 +222,7 @@ func (r *FSRepo) Close() error {
 }
 
 var _ io.Closer = &FSRepo{}
-var _ repo.Interface = &FSRepo{}
+var _ repo.Repo = &FSRepo{}
 
 // IsInitialized returns true if the repo is initialized at provided |path|.
 func IsInitialized(path string) bool {

repo/repo.go

@@ -5,7 +5,7 @@ import (
 	util "github.com/jbenet/go-ipfs/util"
 )
 
-type Interface interface {
+type Repo interface {
 	Config() *config.Config
 	SetConfig(*config.Config) error