Append hashtags to the end of a commit message in Vim - intended for adding the initials of peer reviewers, but will work for any tags (you may want to change the function name if so). Usage: :PRed JB EC / :PRed JB / :PRed JB EC DS, etc

tag.vim

function! AddPeerReviewerInitials(...)
    " Go to the top of the file
    execute ':normal gg'     
    
    " Find the first comment line, and go up one line
    let lineIndex = search('^#') - 1     
    
    " If line is blank, go up another one (my setup adds a new line when amending commit messages)
    if !getline(lineIndex)     
        let lineIndex = lineIndex - 1     
    endif     
    
    let index = 1     
    
    " Loop through tags and append to end of line
    while index <= a:0     
        execute lineIndex . ':normal A #' . a:{index}     
        let index = index + 1     
    endwhile     
endfunction     
command! -nargs=+ -complete=command PRed call AddPeerReviewerInitials(<f-args>)