Implement loading of local flow-bin

Author: halbgut

plugin/flow.vim

@@ -24,7 +24,13 @@ if !exists("g:flow#qfsize")
   let g:flow#qfsize = 1
 endif
 if !exists("g:flow#flowpath")
-  let g:flow#flowpath = "flow"
+  " Search for a local version of flow
+  let s:npm_local_flowpath = finddir("node_modules", ".;") . "/.bin/flow"
+  if filereadable(s:npm_local_flowpath)
+    let g:flow#flowpath = s:npm_local_flowpath
+  else
+    let g:flow#flowpath = "flow"
+  endif
 endif
 if !exists("g:flow#timeout")
   let g:flow#timeout = 2