Add provider#Poll() to handle starting and polling the provider

1 files changed, 21 insertions, 0 deletions

diff --git a/runtime/autoload/provider.vim b/runtime/autoload/provider.vim
new file mode 100644
index 0000000000..dc24e801d0
--- /dev/null
+++ b/runtime/autoload/provider.vim
@@ -0,0 +1,21 @@
+" Common functions for providers
+
+" Start the provider and perform a 'poll' request
+"
+" Returns a valid channel on success
+function! provider#Poll(argv, orig_name, log_env) abort
+  let job = {'rpc': v:true, 'stderr_buffered': v:true}
+  try
+    let channel_id = jobstart(a:argv, job)
+    if channel_id > 0 && rpcrequest(channel_id, 'poll') ==# 'ok'
+      return channel_id
+    endif
+  catch
+    echomsg v:throwpoint
+    echomsg v:exception
+    for row in get(job, 'stderr', [])
+      echomsg row
+    endfor
+  endtry
+  throw remote#host#LoadErrorForHost(a:orig_name, a:log_env)
+endfunction