added customization to man previewer cmd

README.md

@@ -347,6 +347,9 @@ require'fzf-lua'.setup {
       cmd             = "git diff",
       args            = "--color",
     },
+    man = {
+      cmd             = "man -c %s | col -b",
+    },
     builtin = {
       delay           = 100,          -- delay(ms) displaying the preview
                                       -- prevents lag on fast scrolling
@@ -525,7 +528,6 @@ require'fzf-lua'.setup {
   -- "topleft"  : up
   -- "botright" : down
   -- helptags = { previewer = { split = "topleft" } },
-  -- manpages = { previewer = { split = "topleft" } },
   -- uncomment to use `man` command as native fzf previewer
   -- manpages = { previewer = { _ctor = require'fzf-lua.previewer'.fzf.man_pages } },
   -- optional override of file extension icon colors

doc/fzf-lua.txt

@@ -381,6 +381,9 @@ Consult the list below for available settings:
           cmd             = "git diff",
           args            = "--color",
         },
+        man = {
+          cmd             = "man -c %s | col -b",
+        },
         builtin = {
           delay           = 100,          -- delay(ms) displaying the preview
                                           -- prevents lag on fast scrolling
@@ -559,7 +562,6 @@ Consult the list below for available settings:
       -- "topleft"  : up
       -- "botright" : down
       -- helptags = { previewer = { split = "topleft" } },
-      -- manpages = { previewer = { split = "topleft" } },
       -- uncomment to use `man` command as native fzf previewer
       -- manpages = { previewer = { _ctor = require'fzf-lua.previewer'.fzf.man_pages } },
       -- optional override of file extension icon colors

lua/fzf-lua/config.lua

@@ -129,6 +129,10 @@ M.globals = {
       args            = "--color",
       _ctor           = previewers.fzf.git_diff,
     },
+    man = {
+      cmd             = "man -c %s | col -b",
+      _ctor           = previewers.builtin.man_pages,
+    },
     builtin = {
       -- default preview delay 100ms, same as native fzf preview
       -- https://github.com/junegunn/fzf/issues/2417#issuecomment-809886535
@@ -379,9 +383,7 @@ M.globals.manpages = {
         ["ctrl-v"]        = actions.man_vert,
         ["ctrl-t"]        = actions.man_tab,
       },
-      previewer = {
-        _ctor             = previewers.builtin.man_pages,
-      },
+      previewer           = "man",
   }
 M.globals.lsp = {
       previewer           = M._default_previewer_fn,

lua/fzf-lua/previewer/builtin.lua

@@ -30,7 +30,7 @@ function Previewer.base:new(o, opts, fzf_win)
     )})
   self.type = "builtin"
   self.win = fzf_win
-  self.delay = o.delay
+  self.delay = o.delay or 100
   self.title = self.win.winopts.preview.title
   self.syntax = o.syntax
   self.syntax_delay = o.syntax_delay
@@ -502,9 +502,8 @@ function Previewer.man_pages:new(o, opts, fzf_win)
     __index = vim.tbl_deep_extend("keep",
       self, Previewer.help_tags, Previewer.base
     )})
-  -- self.split = o.split
-  -- self.help_cmd = o.help_cmd or "Man"
   self.filetype = "man"
+  self.cmd = o.cmd or "man -c %s | col -b"
   return self
 end
 
@@ -517,14 +516,12 @@ function Previewer.man_pages:populate_preview_buf(entry_str)
   local entry = self:parse_entry(entry_str)
   -- mark the buffer for unloading the next call
   self.preview_bufloaded = true
-  local cmd = ("man -c %s | col -b"):format(entry)
-  local output, err = utils.io_systemlist(cmd)
-  if err == 0 then
-    -- vim.api.nvim_buf_set_option(self.preview_bufnr, 'modifiable', true)
-    vim.api.nvim_buf_set_lines(self.preview_bufnr, 0, -1, false, output)
-    vim.api.nvim_buf_set_option(self.preview_bufnr, 'filetype', self.filetype)
-    self.win:update_scrollbar()
-  end
+  local cmd = self.cmd:format(entry)
+  local output, _ = utils.io_systemlist(cmd)
+  -- vim.api.nvim_buf_set_option(self.preview_bufnr, 'modifiable', true)
+  vim.api.nvim_buf_set_lines(self.preview_bufnr, 0, -1, false, output)
+  vim.api.nvim_buf_set_option(self.preview_bufnr, 'filetype', self.filetype)
+  self.win:update_scrollbar()
 end
 
 function Previewer.marks:new(o, opts, fzf_win)