vim wrong indent when comment lines of yaml file

Question

I have tried the autocmd way, not work for me.

1. One line comment with i, indent wrong.

Press i at begin of the line, then press #, the # and cursor auto indent.

2. One line comment with I, indent right.

Press I at begin of the line, the cursor auto indent; then press #.

3. Block comment with Ctrl+v, followed with Shift + i, followed with Esc, indent wrong.

---------------------Edit------------------------

4. Block comment with cursor on the -

The first block and the second block bahaves different.

Answer 1

This drove me nuts too! Thankfully the solution is pretty simple:

autocmd FileType yaml,yaml.ansible setlocal indentkeys-=0#

You need to use "yaml.ansible" if you use the ansible-vim plugin. Using "setlocal" instead of "set" is optional but after decades with Vim I've learned that it is a good idea to specify local when you know you only want it local to avoid nasty surprises.