如何从 AppImage 中提取文件？

Question

简单的问题，如何从 AppImage 中提取文件？

GUI，CLI，无所谓，只要能完成工作。

_{如果重要的话，我正在使用 openSUSE Tumbleweed}

Answer 1

First, look if your AppImage file is using the newest version of its internal format:

/path/to/your.AppImage --appimage-help

If you see the following line in the output:

--appimage-extract              Extract content from embedded filesystem image

you can conclude yourself how to proceed. In this case you have a (newer) type 2 AppImage format in front of you. (The 'path' part of the command may be relative or absolute.)

Second, if the first command didn't work, you can use a helper tool. However, you need sudo/root privileges for this: download appimagetool (which off course is available as an AppImage). Make it executable and run:

/path/to/appimagetool-x86_64.AppImage --list /path/to/your.AppImage

This should give you a list of all files and their (relative) paths embedded in your.AppImage. To extract your.AppImage into a directory named and located at /path/to/somedir , run

mkdir /path/to/somedir
/path/to/appimagetool-x86_64.AppImage /path/to/your.AppImage /path/to/somedir

Third, you can mount AppImages (type 1 as well as type 2) without the helper tool too:

• Type 1:

  mkdir mountpoint
  sudo mount -o loop my.AppImage mountpoint/
  
  # You can now inspect the contents
  # You can now also copy the contents to a writable location of your hard disk
  
  sudo umount mountpoint/
  # Do not forget the umount step!
  # If you do forget it, your system may exhibit unwanted behavior.
  

• Type 2:

  mkdir mountpoint
  my.AppImage --appimage-offset
  123456   # This is just an example output
  
  sudo mount my.AppImage mountpoint/ -o offset=123456
  
  # you can now inspect the contents
  
  sudo umount mountpoint/
  # Do not forget the umount step!
  # If you do forget it, your system may exhibit unwanted behavior.
  

“偏执狂”提示：如果您不想信任 AppImage，则最好使用第三种方法。因为运行（对于类型 2 AppImages）the.AppImage --appimage-extract或the.AppImage --appimage-mount或the.AppImage --appimage-offset意味着您实际上正在执行 AppImage（尽管不是它的内容）。

更新：

在下面的评论中回答@jayarjo的问题（修改后如何重新打包AppImage？）：

1. 您不仅可以使用appimagetool将现有的 AppImage 提取到 AppDir 中。您还可以使用它来将 AppDir（可能在一些更改之后）重新打包回（修改后的）AppImage。

2. 赶紧跑

    appimagetool -v /path/to/AppDir
   

   观察-v新创建的 AppImage 的位置和名称的命令输出（由 详细说明）。就是这样。