在安装gem之前，我怎么知道它会在我的系统上放置哪些文件？据我所知，几乎所有文件都以我的GEM路径结束，如public class GBLSample extends JDialog {
private JPanel contentPane;
private JScrollPane redSP = new JScrollPane(new RedPanel());
public static void main(String[] args) {
EventQueue.invokeLater(() -> {
GBLSample frame = new GBLSample();
frame.setVisible(true);
});
}
private class RedPanel extends JPanel {
RedPanel() {
setLayout(new GridBagLayout());
setBackground(Color.RED);
GridBagConstraints c = new GridBagConstraints();
c.anchor = GridBagConstraints.FIRST_LINE_START;
add(new JTextField(10), c);
c.weightx = 1;
c.gridx = 1;
add(new JComboBox<>(), c);
c.weightx = 0;
c.gridx = 0;
add(new JComboBox<>(), c);
c.gridx = 1;
add(new JComboBox<>(), c);
c.weighty = 1;
c.gridx = 0;
c.gridy = 2;
add(new JButton("SSSS"), c);
}
@Override
public Dimension getPreferredSize() {
Dimension dim = super.getPreferredSize();
JScrollBar sb = redSP.getHorizontalScrollBar();
if (!sb.isShowing())
return dim;
return new Dimension(dim.width, dim.height + sb.getHeight());
}
}
public GBLSample() {
setBounds(100, 100, 350, 400);
contentPane = new JPanel(new BorderLayout());
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
// RED PANEL ------------------------------------------------
redSP.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_NEVER);
contentPane.add(redSP, BorderLayout.PAGE_START);
// BLUE PANEL ------------------------------------------------
JPanel bluePanel = new JPanel();
bluePanel.setBackground(Color.BLUE);
contentPane.add(new JScrollPane(bluePanel));
}
}
中所示。但是，有没有例外？当我执行gem env时，是否将gem install bundler二进制文件放入bundle？
在安装任何内容之前，是否有可以查看的清单文件？
答案 0 :(得分：2)
是的，有办法：
gem fetch GEM下载要检查的gem。这会将gem放在本地目录中。gem specification ./localfile.gem。这会显示YAML清单。所有宝石都只是tar档案，所以你也可以解压缩它们。