plugin: create plugin API and loader, add ipld-git plugin

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

plugin/plugins/git/git.go

@@ -0,0 +1,63 @@
+package git
+
+import (
+	"compress/zlib"
+	"io"
+
+	"github.com/ipfs/go-ipfs/core/coredag"
+	"github.com/ipfs/go-ipfs/plugin"
+
+	"gx/ipfs/QmTprEaAA2A9bst5XH7exuyi5KzNMK3SEDNN8rBDnKWcUS/go-cid"
+	"gx/ipfs/QmYNyRZJBUYPNrLszFmrBrPJbsBh2vMsefz5gnDpB5M1P6/go-ipld-format"
+	git "gx/ipfs/Qma7Kuwun7w8SZphjEPDVxvGfetBkqdNGmigDA13sJdLex/go-ipld-git"
+)
+
+var Plugins = []plugin.Plugin{
+	&GitPlugin{},
+}
+
+type GitPlugin struct{}
+
+var _ plugin.PluginIPLD = (*GitPlugin)(nil)
+
+func (*GitPlugin) Name() string {
+	return "ipld-git"
+}
+
+func (*GitPlugin) Version() string {
+	return "0.0.1"
+}
+
+func (*GitPlugin) Init() error {
+	return nil
+}
+
+func (*GitPlugin) RegisterBlockDecoders(dec format.BlockDecoder) error {
+	dec.Register(cid.GitRaw, git.DecodeBlock)
+	return nil
+}
+
+func (*GitPlugin) RegisterInputEncParsers(iec coredag.InputEncParsers) error {
+	iec.AddParser("raw", "git", parseRawGit)
+	iec.AddParser("zlib", "git", parseZlibGit)
+	return nil
+}
+
+func parseRawGit(r io.Reader) ([]format.Node, error) {
+	nd, err := git.ParseObject(r)
+	if err != nil {
+		return nil, err
+	}
+
+	return []format.Node{nd}, nil
+}
+
+func parseZlibGit(r io.Reader) ([]format.Node, error) {
+	rc, err := zlib.NewReader(r)
+	if err != nil {
+		return nil, err
+	}
+
+	defer rc.Close()
+	return parseRawGit(rc)
+}