I noticed that Sublime is not auto closing the pipe “|” symbol in Ruby (or HAML) for me. In Ruby it’s pretty common to use |x| in a block, a lot more than using just a |, and I would like | to auto close to |cursor| without a tab just like quotes or {} does. Any thoughts?

Edit your keymap file and add this:

  { "keys": "|"], "command": "insert_snippet", "args": {"contents": "|$0|"}, "context":
    
      { "key": "setting.auto_match_enabled", "operator": "equal", "operand": true },
      { "key": "selection_empty", "operator": "equal", "operand": true, "match_all": true },
      { "key": "following_text", "operator": "regex_contains", "operand": "^(?:\t| |\\)|]|\\}|$)", "match_all": true },
      { "key": "preceding_text", "operator": "not_regex_contains", "operand": "\"a-zA-Z0-9_]$", "match_all": true },
      { "key": "eol_selector", "operator": "not_equal", "operand": "string.quoted.double", "match_all": true }
    ]
  },
  { "keys": "|"], "command": "insert_snippet", "args": {"contents": "|${0:$SELECTION}|"}, "context":
    
      { "key": "setting.auto_match_enabled", "operator": "equal", "operand": true },
      { "key": "selection_empty", "operator": "equal", "operand": false, "match_all": true }
    ]
  },
  { "keys": "|"], "command": "move", "args": {"by": "characters", "forward": true}, "context":
    
      { "key": "setting.auto_match_enabled", "operator": "equal", "operand": true },
      { "key": "selection_empty", "operator": "equal", "operand": true, "match_all": true },
      { "key": "following_text", "operator": "regex_contains", "operand": "^\\|", "match_all": true }
    ]
  },
  { "keys": "backspace"], "command": "run_macro_file", "args": {"file": "Packages/Default/Delete Left Right.sublime-macro"}, "context":
    
      { "key": "setting.auto_match_enabled", "operator": "equal", "operand": true },
      { "key": "selection_empty", "operator": "equal", "operand": true, "match_all": true },
      { "key": "preceding_text", "operator": "regex_contains", "operand": "\\|$", "match_all": true },
      { "key": "following_text", "operator": "regex_contains", "operand": "^\\|", "match_all": true }
    ] 
  }

That should be enough.