在 bash 或 *NIX 中的任何其他 shell 中编写脚本时,在运行需要几秒钟以上的命令时,需要一个进度条.
When scripting in bash or any other shell in *NIX, while running a command that will take more than a few seconds, a progress bar is needed.
比如复制一个大文件,打开一个大的tar文件.
For example, copying a big file, opening a big tar file.
您建议通过哪些方式向 shell 脚本添加进度条?
What ways do you recommend to add progress bars to shell scripts?
推荐答案您可以通过覆盖一行来实现.使用 回到行首,无需将 写入终端.
You can implement this by overwriting a line. Use to go back to the beginning of the line without writing to the terminal.
在完成行进后写 .
Write when you're done to advance the line.
使用 echo -ne 来:
这是一个演示:
echo -ne '##### (33%)' sleep 1 echo -ne '############# (66%)' sleep 1 echo -ne '####################### (100%)' echo -ne ' '在下面的评论中,puk 提到如果你从长行开始然后想写一个短行,这个失败":在这种情况下,你需要覆盖长行的长度(例如,用空格).
In a comment below, puk mentions this "fails" if you start with a long line and then want to write a short line: In this case, you'll need to overwrite the length of the long line (e.g., with spaces).
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如何向shell脚本添加进度条?
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