Atom Init script (for Rails) https://qiita.com/ykpythemind/items/a65f24c59b9311c57163

init.js

'use babel';


// for Rails haml view file
const setTabTitle = () => {
  const tabs = atom.views.getView(atom.workspace).querySelectorAll('.vertical li.tab .title');

  Array.from(tabs, (tab) => {
    if (tab.innerText.match(/\.(haml|erb)/)) {
      tab.innerText = tab.dataset.path.split(path.sep).slice(-2).join('/').replace(/\.html\.(haml|erb)/, '');
    }
  });
};

atom.workspace.onDidChangeActiveTextEditor(() => {
  setTabTitle();
});

atom.workspace.onDidOpen(() => {
  setTabTitle();
});

atom.workspace.onDidDestroyPaneItem(() => {
  setTabTitle();
});

// ---

atom.commands.add('atom-text-editor', 'pry:toggle-binding-pry', () => {
  const editor = atom.workspace.getActiveTextEditor();
  if (!editor) {
    return;
  }
  const row = editor.getCursorBufferPosition().row;
  const line = editor.lineTextForBufferRow(row);
  if (line.includes('binding.pry')) {
    const buffer = editor.getBuffer();
    const range = buffer.rangeForRow(row, false);
    editor.setTextInBufferRange(range, '');
  } else {
    editor.insertText('binding.pry');
  }
});

atom.keymaps.add('frominit', {
  "body": {
    "alt-p": "pry:toggle-binding-pry"
  }
});