Feature request: get commit hash for the current line

[andrhua]

I want to be able to jump to the commit, where current line was added/changed. I tried to quickly come up with solution based on blame_line function:

-- lua/gitsigns/actions.lua
M.commit_hash_line = function()
  local bufnr = current_buf()
  local bcache = cache[bufnr]
  if not bcache then
    return
  end

  local lnum = api.nvim_win_get_cursor(0)[1]
  local blame_info = bcache:get_blame(lnum, {})
  assert(blame_info)

  return blame_info.commit.sha
end

But it didn't work

gitsigns.nvim/lua/gitsigns/actions.lua:889: assertion failed!
stack traceback:
        [C]: in function 'assert'
        .../gitsigns.nvim/lua/gitsigns/actions.lua:889: in function 'commit_hash_line'

My best guess is that there are some intricacies in the flow of updating blame cache, if it wasn't my first time grokking at lua code other than my nvim config, I'd probably had more insights :)

This function would neatly integrate with :DiffviewOpen <commit> command

[andrhua]

Nevermind, I found you can do it via diffview means sindrets/diffview.nvim#307 (comment)