Bash:循环搜索与扩展名不匹配的文件 [英] Bash: loop through files that DO NOT match extension

问题描述

我正在编写一个bash脚本，该脚本需要循环目录中与特定扩展名不匹配的文件.到目前为止，我发现以下代码将循环所有与给定扩展名匹配的文件:

I'm writing a bash script that needs to loop files inside a directory that do not match a specific extension. So far, I've found that the following code loops all files that matches the given extension:

for f in *.txt ; do
    echo $f;
done

实例头如何循环遍历与指定扩展名不匹配的文件?

How could insthead loop through files that do not match the specified extension?

推荐答案

您可以使用==运算符进行模式匹配.

You can pattern-match with the == operator.

for f in *; do
    [[ $f == *.txt ]] && continue
    # [[ $f != *.txt ]] || continue
    ...
done

如果此命令可能在空目录中运行，请在循环之前使用shopt -s nullglob，或将[ -e "$f" ] || continue放在循环旁边. (前者是可取的，因为它避免了不断检查文件是否存在.)

If this might run in an empty directory, either use shopt -s nullglob prior to the loop, or put [ -e "$f" ] || continue in side the loop. (The former is preferable, as it avoids constantly checking if a file exists.)

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