feat(startDeamon): allow passing flags to ipfs daemon

src/node.js

@@ -117,18 +117,24 @@ module.exports = class Node {
     }
   }
 
-  startDaemon (done) {
+  startDaemon (flags, done) {
+    if (typeof(flags) === 'function' && typeof(done) === 'undefined') {
+      done = flags
+      flags = []
+    }
+
     const node = this
     parseConfig(node.path, (err, conf) => {
       if (err) return done(err)
 
       let stdout = ""
+      let args = ['daemon'].concat(flags || [])
 
       // strategy:
       // - run subprocess
       // - listen for API addr on stdout (success)
       // - or an early exit or error (failure)
-      node.subprocess = run(node.exec, ['daemon'], {env: node.env})
+      node.subprocess = run(node.exec, args, {env: node.env})
       node.subprocess.on('error', onErr)
         .on('data', onData)
 

test/index.spec.js

@@ -369,3 +369,25 @@ describe('ipfs-api version', function () {
     })
   })
 })
+
+describe('node startDaemon', () => {
+  it('allows passing flags', (done) => {
+    ipfsd.disposable((err, node) => {
+      if (err) throw err
+      node.startDaemon(["--should-not-exist"], (err, ignore) => {
+        if (!err) {
+          throw new Error("should have errored")
+        }
+
+        let errStr = "Unrecognized option 'should-not-exist'"
+
+        err = ""+ err
+        if (err.indexOf(errStr) >= 0) {
+          done() // correct error
+        }
+
+        throw err
+      })
+    })
+  })
+})