feat(config.Store): support store options to enable ipfs api & pubsub

this adds a new "Options" object to store configuration, which after recent upgrades to github.com/qri-io/cafs/ipfs, supports configuring qri's IPFS node to enable the IPFS HTTP API and optionally support for pubsub.

To enable both, config.yaml's `store` should now look like this:

```yaml
store
  type: "ipfs"
  options:
    api: true
    pubsub: true
```

if `store.options.api` is set to `true` it will use the IPFS config to figure out what address to bind the api to (in ipfs that defaults to localhost:5001).

with both api and pubsub activated, it's possible to talk to the underlying pubsub api by supplying an `--api` flag to the go-ipfs binary (version 0.4.18 or higher). after running `qri connect`, in another terminal: `ipfs --api /ip4/127.0.0.1/tcp/5001/ pubsub sub foo` should hang. in a third terminal `ipfs --api /ip4/127.0.0.1/tcp/5001/ pubsub pub foo bar` will publish to the second terminal. fun! This `--api` flag trick should work for most ipfs commands.

closes #162, closes #658

cmd/qri.go

@@ -145,10 +145,16 @@ func (o *QriOptions) Init() (err error) {
  }
 
  var fs *ipfs.Filestore
- fs, err = ipfs.NewFilestore(func(cfg *ipfs.StoreCfg) {
- cfg.FsRepoPath = o.ipfsFsPath
- // cfg.Online = online
- })
+
+ fsOpts := []ipfs.Option{
+ func(cfg *ipfs.StoreCfg) {
+ cfg.FsRepoPath = o.ipfsFsPath
+ // cfg.Online = online
+ },
+ ipfs.OptsFromMap(o.config.Store.Options),
+ }
+
+ fs, err = ipfs.NewFilestore(fsOpts...)
  if err != nil {
  return
  }

config/store.go

@@ -4,13 +4,17 @@ import "github.com/qri-io/jsonschema"
 
 // Store configures a qri content addessed file store (cafs)
 type Store struct {
- Type string `json:"type"`
+ Type string `json:"type"`
+ Options map[string]interface{} `json:"options,omitempty"`
 }
 
 // DefaultStore returns a new default Store configuration
 func DefaultStore() *Store {
  return &Store{
  Type: "ipfs",
+ Options: map[string]interface{}{
+ "api": true,
+ },
  }
 }
 
@@ -38,7 +42,8 @@ func (cfg Store) Validate() error {
 // Copy returns a deep copy of the Store struct
 func (cfg *Store) Copy() *Store {
  res := &Store{
- Type: cfg.Type,
+ Type: cfg.Type,
+ Options: cfg.Options,
  }
 
  return res