bash - 确定执行 Bash 脚本的路径

Question

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Answer 1

对于相对路径(即直接等效于 Windows 的 %~dp0):

MY_PATH="$(dirname -- "${BASH_SOURCE[0]}")"
echo "$MY_PATH"

对于绝对的规范化路径:

MY_PATH="$(dirname -- "${BASH_SOURCE[0]}")"            # relative
MY_PATH="$(cd -- "$MY_PATH" && pwd)"    # absolutized and normalized
if [[ -z "$MY_PATH" ]] ; then
  # error; for some reason, the path is not accessible
  # to the script (e.g. permissions re-evaled after suid)
  exit 1  # fail
fi
echo "$MY_PATH"