如何显示使用bash set -e时失败的最后一条命令? [英] How to display last command that failed when using bash set -e?

问题描述

我正在使用 set -e 在出现第一个错误时停止执行脚本.

I am using set -e to stop execution of a script on first error.

问题在于，这并不能告诉我出了什么问题.

The problem is that this does not tell me what went wrong.

如何更新bash脚本，以便它向我显示最后一个失败的命令?

How can update a bash script so it will display me the last command that failed?

推荐答案

使用ERR陷阱代替 set -e ；您可以传入 $ BASH_LINENO 来获取发生错误的特定行号.我在 https://stackoverflow.com/a/185900/14122 <

Instead of set -e, use an ERR trap; you can pass $BASH_LINENO in to get the specific line number on which the error occurred. I provide a script taking advantage of this in my answer at https://stackoverflow.com/a/185900/14122

总结:

error() {
   local sourcefile=$1
   local lineno=$2
   # ...logic for reporting an error at line $lineno
   #    of file $sourcefile goes here...
}
trap 'error "${BASH_SOURCE}" "${LINENO}"' ERR

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