Move #init_buffer() into #process_buffer().

autoload/gitgutter.vim

@@ -10,7 +10,6 @@ function! gitgutter#all(force) abort
       let file = expand('#'.bufnr.':p')
       if !empty(file)
         if index(visible, bufnr) != -1
-          call gitgutter#init_buffer(bufnr)
           call gitgutter#process_buffer(bufnr, a:force)
         elseif a:force
           call s:reset_tick(bufnr)
@@ -21,22 +20,22 @@ function! gitgutter#all(force) abort
 endfunction
 
 
-" Finds the file's path relative to the repo root.
-function! gitgutter#init_buffer(bufnr)
-  if gitgutter#utility#is_active(a:bufnr)
-    let p = gitgutter#utility#repo_path(a:bufnr, 0)
-    if type(p) != s:t_string || empty(p)
-      call gitgutter#utility#set_repo_path(a:bufnr)
-      call s:setup_maps()
-    endif
-  endif
-endfunction
-
-
 function! gitgutter#process_buffer(bufnr, force) abort
   " NOTE a:bufnr is not necessarily the current buffer.
 
   if gitgutter#utility#is_active(a:bufnr)
+
+    let p = gitgutter#utility#repo_path(a:bufnr, 0)
+    if type(p) != s:t_string || empty(p)
+      call s:setup_maps()
+
+      let Continuation = function('gitgutter#process_buffer', [a:bufnr, a:force])
+      let ret = gitgutter#utility#set_repo_path(a:bufnr, Continuation)
+      if ret ==# 'async'
+        return
+      endif
+    endif
+
     if a:force || s:has_fresh_changes(a:bufnr)
 
       let diff = ''

autoload/gitgutter/diff.vim

@@ -68,9 +68,9 @@ let s:counter = 0
 "                      the hunk headers (@@ -x,y +m,n @@); only possible if
 "                      grep is available.
 function! gitgutter#diff#run_diff(bufnr, from, preserve_full_diff) abort
-  while gitgutter#utility#repo_path(a:bufnr, 0) == -1
-    sleep 5m
-  endwhile
+  if gitgutter#utility#repo_path(a:bufnr, 0) == -1
+    throw 'gitgutter author fail'
+  endif
 
   if gitgutter#utility#repo_path(a:bufnr, 0) == -2
     throw 'gitgutter not tracked'

autoload/gitgutter/utility.vim

@@ -120,6 +120,8 @@ let s:set_path_handler = {}
 function! s:set_path_handler.out(buffer, path) abort
   let path = s:strip_trailing_new_line(a:path)
   call gitgutter#utility#setbufvar(a:buffer, 'path', path)
+
+  call self.continuation()
 endfunction
 
 function! s:set_path_handler.err(buffer) abort
@@ -127,7 +129,8 @@ function! s:set_path_handler.err(buffer) abort
 endfunction
 
 
-function! gitgutter#utility#set_repo_path(bufnr) abort
+" continuation - a funcref to call after setting the repo path asynchronously.
+function! gitgutter#utility#set_repo_path(bufnr, continuation) abort
   " Values of path:
   " * non-empty string - path
   " *               -1 - pending
@@ -138,14 +141,16 @@ function! gitgutter#utility#set_repo_path(bufnr) abort
 
   if g:gitgutter_async && gitgutter#async#available()
     let handler = copy(s:set_path_handler)
+    let handler.continuation = a:continuation
     call gitgutter#async#execute(cmd, a:bufnr, handler)
+    return 'async'
+  endif
+
+  let path = gitgutter#utility#system(cmd)
+  if v:shell_error
+    call gitgutter#utility#setbufvar(a:bufnr, 'path', -2)
   else
-    let path = gitgutter#utility#system(cmd)
-    if v:shell_error
-      call gitgutter#utility#setbufvar(a:bufnr, 'path', -2)
-    else
-      call gitgutter#utility#setbufvar(a:bufnr, 'path', s:strip_trailing_new_line(path))
-    endif
+    call gitgutter#utility#setbufvar(a:bufnr, 'path', s:strip_trailing_new_line(path))
   endif
 endfunction
 

plugin/gitgutter.vim

@@ -190,7 +190,6 @@ function! s:on_bufenter()
     let t:gitgutter_didtabenter = 0
     call gitgutter#all(!g:gitgutter_terminal_reports_focus)
   else
-    call gitgutter#init_buffer(bufnr(''))
     call gitgutter#process_buffer(bufnr(''), !g:gitgutter_terminal_reports_focus)
   endif
 endfunction