Implement squashing lines as a function

[etc/lazyvim.git] / .config / lazyvim / after / ftplugin / mail.lua

diff --git a/.config/lazyvim/after/ftplugin/mail.lua b/.config/lazyvim/after/ftplugin/mail.lua
index 176382c30e9e39869ddfd4f495ee65af0e8cc0f3..8513a6d1ee1b406417af53386b617099f65fcfc1 100644 (file)
--- a/.config/lazyvim/after/ftplugin/mail.lua
+++ b/.config/lazyvim/after/ftplugin/mail.lua
@@ -27,7 +27,29 @@ vim.opt_local.commentstring = "> %s" -- commenting means quoting in mails
 vim.api.nvim_create_autocmd({ "BufWrite" }, {
   buffer = 0,
   group = vim.api.nvim_create_augroup("squashemptylines", { clear = true }),
-  command = [[%s/\v(\n)\n+$/\1/ge]],
+  callback = function()
+    local lines = vim.api.nvim_buf_get_lines(0, 0, -1, false)
+    local ret = {}
+    local count = 0
+    local squash = false
+    for _, line in ipairs(lines) do
+      if line == "" then
+        if not squash then
+          squash = true
+          table.insert(ret, line)
+        else
+          count = count + 1
+        end
+      else
+        squash = false
+        table.insert(ret, line)
+      end
+    end
+    if count > 0 then
+      vim.notify("Squashed " .. count .. " empty line(s)")
+    end
+    vim.api.nvim_buf_set_lines(0, 0, -1, false, ret)
+  end,
 })
 -- }}}