From f076c6b071e6117d2cbb26d53327ff21fc22fdb8 Mon Sep 17 00:00:00 2001
From: uga-rosa <uga6603@gmail.com>
Date: Sat, 19 Aug 2023 23:04:37 +0900
Subject: [PATCH] feat: use vim.system() instead of plenary.job

---
 README.md                       |  4 +++-
 doc/cmp-dictionary.txt          |  5 +++++
 lua/cmp_dictionary/document.lua | 40 ++++++++++++++++++++-------------
 3 files changed, 32 insertions(+), 17 deletions(-)

diff --git a/README.md b/README.md
index 3cb61ed..60a04a2 100644
--- a/README.md
+++ b/README.md
@@ -8,10 +8,12 @@ This plugin provides one of the easiest way to add desired completion candidates
 
 # Requirements
 
+`plenary.nvim` is not required if neovim is the version with `vim.system()` available.
+
 - neovim >= 0.7
 - nvim-cmp
-- [plenary.nvim](https://github.com/nvim-lua/plenary.nvim) (only document feature)
 - [sqlite.lua](https://github.com/kkharji/sqlite.lua) (only if sqlite option is enabled)
+- [plenary.nvim](https://github.com/nvim-lua/plenary.nvim) (only document feature)
 
 # Setting
 
diff --git a/doc/cmp-dictionary.txt b/doc/cmp-dictionary.txt
index 7451b8d..edf82ca 100644
--- a/doc/cmp-dictionary.txt
+++ b/doc/cmp-dictionary.txt
@@ -32,9 +32,14 @@ Requirements
 - neovim >= 0.7
 - nvim-cmp
   - https://github.com/hrsh7th/nvim-cmp
+- sqlite.lua (only if sqlite option is enabled)
+  - https://github.com/kkharji/sqlite.lua
 - plenary.nvim (only document feature)
   - https://github.com/nvim-lua/plenary.nvim
 
+plenary.nvim is not required if neovim is the version with |vim.system()|
+available.
+
 
 ==============================================================================
 Commands					*cmp-dictionary-commands*
diff --git a/lua/cmp_dictionary/document.lua b/lua/cmp_dictionary/document.lua
index 7a39e08..2849dbe 100644
--- a/lua/cmp_dictionary/document.lua
+++ b/lua/cmp_dictionary/document.lua
@@ -32,29 +32,37 @@ end
 ---@param completion_item lsp.CompletionItem
 ---@param callback fun(completion_item: lsp.CompletionItem|nil)
 local function get_document(completion_item, callback)
-  local ok, Job = pcall(require, "plenary.job")
-  if not ok then
-    vim.notify("[cmp-dictionary] document feature requires plenary.nvim")
-    return
-  end
-
   local word = completion_item.label
   local command, args = get_command(word)
   if not command then
     callback(completion_item)
     return
   end
-
-  Job:new({
-    command = command,
-    args = args,
-    on_exit = vim.schedule_wrap(function(j)
-      local result = table.concat(j:result(), "\n")
-      document_cache:set(word, result)
-      completion_item.documentation = result
+  if vim.system then
+    local cmd = args
+    table.insert(cmd, 1, command)
+    vim.system(cmd, {}, function(result)
+      document_cache:set(word, result.stdout)
+      completion_item.documentation = result.stdout
       callback(completion_item)
-    end),
-  }):start()
+    end)
+  else
+    local ok, Job = pcall(require, "plenary.job")
+    if not ok then
+      vim.notify("[cmp-dictionary] document feature requires plenary.nvim")
+      return
+    end
+    Job:new({
+      command = command,
+      args = args,
+      on_exit = vim.schedule_wrap(function(j)
+        local result = table.concat(j:result(), "\n")
+        document_cache:set(word, result)
+        completion_item.documentation = result
+        callback(completion_item)
+      end),
+    }):start()
+  end
 end
 
 ---@param completion_item lsp.CompletionItem