Inline help in vim with vertical split.

Added a small script to open a vertical split window with the output of
cmake --help-command for the word under the cursor.

Docs/cmake-help.vim

@@ -0,0 +1,21 @@
+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>