From 21474b586cc015f01c13ca94bd010925172f32be Mon Sep 17 00:00:00 2001
From: smolck <46855713+smolck@users.noreply.github.com>
Date: Sun, 30 Aug 2020 12:22:21 -0500
Subject: [PATCH] Add FZF builtin for searching vim.v.oldfiles

---
 lua/telescope/builtin.lua | 26 ++++++++++++++++++++++++++
 lua/telescope/finders.lua |  2 ++
 2 files changed, 28 insertions(+)

diff --git a/lua/telescope/builtin.lua b/lua/telescope/builtin.lua
index 6b6ee8e..33728b2 100644
--- a/lua/telescope/builtin.lua
+++ b/lua/telescope/builtin.lua
@@ -233,4 +233,30 @@ builtin.grep_string = function(opts)
   }
 end
 
+builtin.fzf_history = function()
+  local history_lines = table.concat(vim.v.oldfiles, '\n')
+
+  local fzf = finders.new {
+    maximum_results = 1000,
+    fn_command = function(self, prompt)
+      return {
+        command = 'fzf',
+        args = {'--no-sort', '--filter', prompt},
+
+        writer = {
+          command = 'echo',
+          args = {history_lines},
+        }
+      }
+    end
+  }
+
+  local file_picker = pickers.new { }
+
+  file_picker:find {
+    prompt = 'FZF History',
+    finder = fzf,
+  }
+end
+
 return builtin
diff --git a/lua/telescope/finders.lua b/lua/telescope/finders.lua
index 7866c87..700d6d0 100644
--- a/lua/telescope/finders.lua
+++ b/lua/telescope/finders.lua
@@ -129,6 +129,8 @@ function Finder:_find(prompt, process_result, process_complete)
 
     maximum_results = self.maximum_results,
 
+    writer = opts.writer and Job:new(opts.writer) or nil,
+
     on_stdout = on_output,
     on_stderr = on_output,