Define autocommands
Hint
As always, for help and more infos, see:
1:help nvim_create_autocmd()
or neovims online docs:
To define a new autocommand, we simply use the vim.api.nvim_create_autocmd():
1-- the first parameter represents a list of events we want to bind our command to:
2-- https://neovim.io/doc/user/autocmd.html#autocmd-events
3vim.api.nvim_create_autocmd({"BufWritePre", nil}, {
4 -- pattern allows us to restrict our callback to certain files,
5 -- https://neovim.io/doc/user/autocmd.html#autocmd-pattern
6 -- here we restrict the execution to markdown and mdx files:
7 pattern = {"*.md", "*.mdx"},
8 -- callback function will be executed once one of the events in the event list occurs
9 callback = function () end,
10})
Run a command before saving a file
1-- run the following just before saving
2vim.api.nvim_create_autocmd("BufWritePre", {
3 pattern = "*.*",
4 callback = function () print("hello world") end,
5 -- you wont see any output due to neovim
6 -- overwriting the output with the written file output
7})
Run Prettier before saving a file
If you followed the configure-coc-nvim guide,
you already have the Prettier command defined. We want to run :Prettier on every save for every file type we open.
This can be archived by using the nvim_create_autocmd function together with the vim.cmd interface:
1vim.api.nvim_create_autocmd("BufWritePre", {
2 pattern = "*.*",
3 callback = function () vim.cmd(":Prettier") end,
4})