I want to highlight lines that are longer than the set textwidth so that it is dynamic for different filetypes. I have the following:
autocmd BufEnter * highlight OverLength ctermbg=darkgrey guibg=#592929
autocmd FileType * execute 'match OverLength /%\{'.&textwidth.',}v.*/'
This code doesn't seem to activate the highlighting, however, the following does work:
autocmd BufEnter * highlight OverLength ctermbg=darkgrey guibg=#592929
autocmd BufEnter * match OverLength /\%>90v.\+*/
I have tried excluding the execute statement and adding the backslashes accordingly but I still cannot seem to get this to work. Also, I think using the execute statement makes this code cleaner. I would appreciate it if someone could explain to me what I am doing incorrectly.
I have referenced the following examples in pursuit of the answer:
expand a variable in regular expression
If there is a more portable and cleaner way to go about this then please let me know. I am trying to learn as much as possible.
ANSWER:
What I ended up doing is utilizing vim's vim/after/ftplugin folder hierarchy and adding:
set textwidth=100
let &colorcolumn=join(range(&textwidth+1,999),",")
to each filetype.vim file e.g. markdown.vim, java.vim, vim.vim
And for help.vim and man.vim files I didn't want colorcolumn highlighting so I changed the textwidth in those files to 999. By doing this vim was able to distinguish between different file types when they were open in the same session.
