Fix alignment for Fugitive blame

[ouuan]

By default, Fugitive blame does not have the drop bar, so the line blames are not aligned with the file content.

I use the following config to add a dummy drop bar to fix it:

local default_config = require 'dropbar.configs'.opts

require 'dropbar'.setup {
  general = {
    enable = function(buf, win)
      return default_config.general.enable(buf, win)
        or vim.bo[buf].ft == 'fugitiveblame'
    end,
  },
  bar = {
    sources = function(buf, win)
      if vim.bo[buf].ft == 'fugitiveblame' then
        return {}
      end
      return default_config.bar.sources(buf, win)
    end
  },
}

[feakuru]

stumbled upon this while looking to solve exactly this problem, thank you ouuan!
the configs have been seemingly changed a bit recently, here's the version that worked for me:

local default_config = require 'dropbar.configs'.opts
require('dropbar').setup {
  bar = {
    enable = function(buf, win)
      return default_config.bar.enable(buf, win)
        or vim.bo[buf].ft == 'fugitiveblame'
    end,
    sources = function(buf, win)
      if vim.bo[buf].ft == 'fugitiveblame' then
        return {}
      end
      return default_config.bar.sources(buf, win)
    end
  },
}

[Bekaboo]

@feakuru A more general method that doesn't depend on dropbar's setup function is:

vim.api.nvim_create_autocmd('FileType', {
  desc = 'Set buffer-local options for fugitive blame buffers.',
  group = vim.api.nvim_create_augroup('FugitiveSettings', {}),
  pattern = 'fugitiveblame',
  callback = function()
    local win_alt = vim.fn.win_getid(vim.fn.winnr('#'))
    vim.opt_local.winbar = vim.api.nvim_win_is_valid(win_alt)
        and vim.wo[win_alt].winbar ~= ''
        and ' '
      or ''
  end,
})

Put this in your fugitive config and it will work even if you switch to other winbar plugins or when the source window does not have winbar enabled.