feat: add files.ls streaming methods

N.b will not actually do any streaming until ipfs/kubo#5611
lands

src/files-mfs/index.js

@@ -12,6 +12,8 @@ module.exports = (arg) => {
     stat: require('./stat')(send),
     rm: require('./rm')(send),
     ls: require('./ls')(send),
+    lsReadableStream: require('./ls-readable-stream')(send),
+    lsPullStream: require('./ls-pull-stream')(send),
     read: require('./read')(send),
     readReadableStream: require('./read-readable-stream')(send),
     readPullStream: require('./read-pull-stream')(send),

src/files-mfs/ls-pull-stream.js

@@ -0,0 +1,21 @@
+'use strict'
+
+const ls = require('./ls')
+const defer = require('pull-defer')
+const values = require('pull-stream/sources/values')
+
+module.exports = (send) => {
+  return (args, opts) => {
+    const deferred = defer.source()
+
+    ls(send)(args, opts, (err, entries) => {
+      if (err) {
+        return deferred.abort(err)
+      }
+
+      return deferred.resolve(values(entries))
+    })
+
+    return deferred
+  }
+}

src/files-mfs/ls-readable-stream.js

@@ -0,0 +1,13 @@
+'use strict'
+
+const {
+  PassThrough
+} = require('stream')
+const lsPullStream = require('./ls-pull-stream')
+const toStream = require('pull-stream-to-stream')
+
+module.exports = (send) => {
+  return (args, opts) => {
+    return toStream.source(lsPullStream(send)(args, opts))
+  }
+}