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nmap ,hc :call OpenCmakeHelp()<CR>
function! OpenCmakeHelp()
let s = getline( '.' )
let i = col( '.' ) - 1
while i > 0 && strpart( s, i, 1 ) =~ '[A-Za-z0-9_]'
let i = i - 1
endwhile
while i < col('$') && strpart( s, i, 1 ) !~ '[A-Za-z0-9_]'
let i = i + 1
endwhile
let start = match( s, '[A-Za-z0-9_]\+', i )
let end = matchend( s, '[A-Za-z0-9_]\+', i )
let ident = strpart( s, start, end - start )
execute "vertical new"
execute "%!cmake --help-command ".ident
set nomodified
set readonly
endfunction
autocmd BufRead,BufNewFile *.cmake,CMakeLists.txt,*.cmake.in nmap <F1> :call OpenCmakeHelp()<CR>
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