Add R5RS REPL support

.vim/ftplugin/scheme/icp1.vim

@@ -0,0 +1,31 @@
+"
+" Originally from:
+" https://github.com/ward/dotfiles/blob/master/vim/ftplugin/scheme/icp1.vim
+"
+
+fu! s:OpenR5RS(path)
+  let prelude = [
+        \ "(#%require xrepl)",
+        \ "(load \"" . a:path . "\")",
+        \ "\<CR>"
+        \ ]->join("")
+  let s:term = term_start("plt-r5rs --no-prim", {"term_finish": "close", "vertical": 1})
+  call term_sendkeys("", prelude)
+endfu
+
+fu! s:GetVisualSelection()
+  try
+    let a_save = @a
+    normal! gv"ay
+    return @a
+  finally
+    let @a = a_save
+  endtry
+endfu
+
+fu! s:SendR5RSkeys()
+  call term_sendkeys(s:term, s:GetVisualSelection())
+endfu
+
+nnoremap <buffer> <leader>o :call <sid>OpenR5RS(@%)<cr>
+vnoremap <buffer> <leader>r <esc>:call <sid>SendR5RSkeys()<cr>