lines|blines|grep_curbuf|lgrep_curbuf: hide filename by default

fix help buffer syntax highlighting in blines|buffer preview

README.md

@@ -504,11 +504,36 @@ require'fzf-lua'.setup {
       ["ctrl-x"]      = actions.buf_del,
     }
   },
+  lines = {
+    previewer         = "builtin",    -- set to 'false' to disable
+    prompt            = 'Lines❯ ',
+    show_unlisted     = false,        -- exclude 'help' buffers
+    no_term_buffers   = true,         -- exclude 'term' buffers
+    fzf_opts = {
+      -- do not include bufnr in fuzzy matching
+      -- tiebreak by line no.
+      ['--delimiter'] = vim.fn.shellescape(']'),
+      ["--nth"]       = '2..',
+      ["--tiebreak"]  = 'index',
+    },
+    actions = {
+      ["default"]     = actions.buf_edit,
+      ["ctrl-s"]      = actions.buf_split,
+      ["ctrl-v"]      = actions.buf_vsplit,
+      ["ctrl-t"]      = actions.buf_tabedit,
+    }
+  },
   blines = {
     previewer         = "builtin",    -- set to 'false' to disable
     prompt            = 'BLines❯ ',
     show_unlisted     = true,         -- include 'help' buffers
     no_term_buffers   = false,        -- include 'term' buffers
+    fzf_opts = {
+      -- hide filename, tiebreak by line no.
+      ['--delimiter'] = vim.fn.shellescape('[:]'),
+      ["--with-nth"]  = '2..',
+      ["--tiebreak"]  = 'index',
+    },
     actions = {
       ["default"]     = actions.buf_edit,
       ["ctrl-s"]      = actions.buf_split,

doc/fzf-lua.txt

@@ -538,11 +538,36 @@ Consult the list below for available settings:
           ["ctrl-x"]      = actions.buf_del,
         }
       },
+      lines = {
+        previewer         = "builtin",    -- set to 'false' to disable
+        prompt            = 'Lines❯ ',
+        show_unlisted     = false,        -- exclude 'help' buffers
+        no_term_buffers   = true,         -- exclude 'term' buffers
+        fzf_opts = {
+          -- do not include bufnr in fuzzy matching
+          -- tiebreak by line no.
+          ['--delimiter'] = vim.fn.shellescape(']'),
+          ["--nth"]       = '2..',
+          ["--tiebreak"]  = 'index',
+        },
+        actions = {
+          ["default"]     = actions.buf_edit,
+          ["ctrl-s"]      = actions.buf_split,
+          ["ctrl-v"]      = actions.buf_vsplit,
+          ["ctrl-t"]      = actions.buf_tabedit,
+        }
+      },
       blines = {
         previewer         = "builtin",    -- set to 'false' to disable
         prompt            = 'BLines❯ ',
         show_unlisted     = true,         -- include 'help' buffers
         no_term_buffers   = false,        -- include 'term' buffers
+        fzf_opts = {
+          -- hide filename, tiebreak by line no.
+          ['--delimiter'] = vim.fn.shellescape('[:]'),
+          ["--with-nth"]  = '2..',
+          ["--tiebreak"]  = 'index',
+        },
         actions = {
           ["default"]     = actions.buf_edit,
           ["ctrl-s"]      = actions.buf_split,

lua/fzf-lua/config.lua

@@ -324,6 +324,13 @@ M.globals.lines = {
     prompt                = 'Lines> ',
     file_icons            = true and M._has_devicons,
     color_icons           = true,
+    show_unlisted         = false,
+    no_term_buffers       = true,
+    fzf_opts = {
+        ['--delimiter']   = vim.fn.shellescape(']'),
+        ["--nth"]         = '2..',
+        ["--tiebreak"]    = 'index',
+    },
     actions = {
         ["default"]       = actions.buf_edit,
         ["ctrl-s"]        = actions.buf_split,
@@ -338,6 +345,11 @@ M.globals.blines = {
     color_icons           = true,
     show_unlisted         = true,
     no_term_buffers       = false,
+    fzf_opts = {
+        ['--delimiter']   = vim.fn.shellescape('[:]'),
+        ["--with-nth"]    = '2..',
+        ["--tiebreak"]    = 'index',
+    },
     actions = {
         ["default"]       = actions.buf_edit,
         ["ctrl-s"]        = actions.buf_split,

lua/fzf-lua/path.lua

@@ -170,7 +170,7 @@ function M.entry_to_file(entry, cwd)
   if bufnr then
     terminal = utils.is_term_buffer(bufnr)
     if terminal then
-      file, line = stripped:match("(.*):(%d+)$")
+      file, line = stripped:match("([^:]+):(%d+)")
     end
   end
   return {

lua/fzf-lua/previewer/builtin.lua

@@ -252,6 +252,7 @@ function Previewer.buffer_or_file:populate_preview_buf(entry_str)
     else --]]
       -- mark the buffer for unloading the next call
       self.preview_bufloaded = true
+      entry.filetype = vim.api.nvim_buf_get_option(entry.bufnr, 'filetype')
       local lines = vim.api.nvim_buf_get_lines(entry.bufnr, 0, -1, false)
       vim.api.nvim_buf_set_lines(self.preview_bufnr, 0, -1, false, lines)
     -- end
@@ -335,11 +336,19 @@ function Previewer.buffer_or_file:do_syntax(entry)
         ))
       end
       if syntax_limit_reached == 0 then
-        -- prepend the buffer number to the path and
-        -- set as buffer name, this makes sure 'filetype detect'
-        -- gets the right filetype which enables the syntax
-        local tempname = path.join({tostring(bufnr), entry.path})
-        pcall(api.nvim_buf_set_name, bufnr, tempname)
+        if entry.filetype and #entry.filetype>0 then
+          -- filetype was saved from a loaded buffer
+          -- this helps avoid losing highlights for help buffers
+          -- which are '.txt' files with 'ft=help'
+          -- api.nvim_buf_set_option(bufnr, 'filetype', entry.filetype)
+          pcall(api.nvim_buf_set_option, bufnr, 'filetype', entry.filetype)
+        else
+          -- prepend the buffer number to the path and
+          -- set as buffer name, this makes sure 'filetype detect'
+          -- gets the right filetype which enables the syntax
+          local tempname = path.join({tostring(bufnr), entry.path})
+          pcall(api.nvim_buf_set_name, bufnr, tempname)
+        end
         -- nvim_buf_call has less side-effects than window switch
         api.nvim_buf_call(bufnr, function()
           vim.cmd('filetype detect')

lua/fzf-lua/providers/buffers.lua

@@ -205,9 +205,6 @@ end
 M.buffer_lines = function(opts)
   if not opts then return end
 
-  if opts.no_term_buffers == nil then
-    opts.no_term_buffers = true
-  end
   local buffers = filter_buffers(opts,
     opts.current_buffer_only and { vim.api.nvim_get_current_buf() } or
     vim.api.nvim_list_bufs())
@@ -249,9 +246,6 @@ M.buffer_lines = function(opts)
     -- disable multi-select
     opts.fzf_opts["--no-multi"] = ''
     opts.fzf_opts["--preview-window"] = 'hidden:right:0'
-    opts.fzf_opts["--delimiter"] = vim.fn.shellescape(']')
-    opts.fzf_opts["--nth"] = '2,-1'
-    opts.fzf_opts["--tiebreak"] = 'index'
 
     if opts.search and #opts.search>0 then
       opts.fzf_opts['--query'] = vim.fn.shellescape(opts.search)

lua/fzf-lua/providers/grep.lua

@@ -349,8 +349,10 @@ M.grep_curbuf = function(opts)
   if opts.exec_empty_query == nil then
     opts.exec_empty_query = true
   end
+  opts.fzf_opts = vim.tbl_extend("keep",
+    opts.fzf_opts or {}, config.globals.blines.fzf_opts)
   opts.filename = vim.api.nvim_buf_get_name(0)
-  if #opts.filename > 0 then
+  if #opts.filename > 0 and vim.loop.fs_stat(opts.filename) then
     opts.filename = path.relative(opts.filename, vim.loop.cwd())
     if opts.lgrep then
       return M.live_grep(opts)
@@ -359,7 +361,7 @@ M.grep_curbuf = function(opts)
       return M.grep(opts)
     end
   else
-    utils.info("Rg current buffer requires actual file on disk")
+    utils.info("Rg current buffer requires file on disk")
     return
   end
 end