Make universal maps global

autoload/fugitive.vim

@@ -5847,10 +5847,6 @@ function! fugitive#Init() abort
       let &mls = save_mls
     endtry
   endif
-  if !exists('g:fugitive_no_maps')
-    call s:Map('c', '<C-R><C-G>', '<SID>fnameescape(fugitive#Object(@%))', '<expr>')
-    call s:Map('n', 'y<C-G>', ':<C-U>call setreg(v:register, fugitive#Object(@%))<CR>', '<silent>')
-  endif
   let dir = s:Dir()
   if stridx(&tags, escape(dir, ', ')) == -1 && &tags !~# '\.git' && !exists('s:tags_warning')
     let actualdir = fugitive#Find('.git/', dir)

plugin/fugitive.vim

@@ -400,3 +400,38 @@ exe 'command! -bar -bang -nargs=1 -complete=customlist,fugitive#CompleteObject G
 exe 'command! -bar -bang -nargs=1 -complete=customlist,fugitive#RenameComplete Grename exe fugitive#RenameCommand(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>, [<f-args>])'
 
 exe 'command! -bar -bang -range=-1 -nargs=* -complete=customlist,fugitive#CompleteObject Gbrowse exe fugitive#BrowseCommand(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>, [<f-args>])'
+
+if get(g:, 'fugitive_no_maps')
+  finish
+endif
+
+let s:nowait = v:version >= 704 ? '<nowait>' : ''
+
+function! s:Map(mode, lhs, rhs, ...) abort
+  for mode in split(a:mode, '\zs')
+    let flags = (a:0 ? a:1 : '') . (a:rhs =~# '<Plug>' ? '' : '<script>')
+    let head = a:lhs
+    let tail = ''
+    let keys = get(g:, mode.'remap', {})
+    if type(keys) == type([])
+      return
+    endif
+    while !empty(head)
+      if has_key(keys, head)
+        let head = keys[head]
+        if empty(head)
+          return
+        endif
+        break
+      endif
+      let tail = matchstr(head, '<[^<>]*>$\|.$') . tail
+      let head = substitute(head, '<[^<>]*>$\|.$', '', '')
+    endwhile
+    if flags !~# '<unique>' || empty(mapcheck(head.tail, mode))
+      exe mode.'map' s:nowait flags head.tail a:rhs
+    endif
+  endfor
+endfunction
+
+call s:Map('c', '<C-R><C-G>', 'fnameescape(fugitive#Object(@%))', '<expr>')
+call s:Map('n', 'y<C-G>', ':<C-U>call setreg(v:register, fugitive#Object(@%))<CR>', '<silent>')