Tip #801: Folding of (gnu)make output

I regularly use the compiler output window of the QuickFix feature (see help on 'quickfix' and 'copen') to navigate the compiler output. Working on a largish software system with multiple directories with subdirectories in them, the list can get quite long. I use the following entries in my .vimrc to automatically fold on each subdirectory, and open folds containing errors (the string 'error:'). Aditionally 'zw' open also the folds containing the string 'warning:', while 'zq' switches back to the original.

"Folding of (gnu)make output
au BufReadPost quickfix setlocal foldmethod=marker
au BufReadPost quickfix setlocal foldmarker=Entering\ directory,Leaving\ directory
au BufReadPost quickfix map <buffer> <silent> zq zM:g/error:/normal zv<cr>
au BufReadPost quickfix map <buffer> <silent> zw zq:g/warning:/normal zv<cr>
au BufReadPost quickfix normal zq



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