Bash one liner - 测试文件是否存在，如果其他文件出现错误，请测试源文件

Question

换句话说，我想把它变成一个单行：

    test -e ${MY_HOME}/setup-env.sh || { echo "ERROR: MY_HOME not defined or does not contain srtup-env.sh" 1>&2 ; exit 1; }

    . ${MY_HOME}/setup-env.sh

Answer 1

你可以使用这个衬垫：

[[ -e "${MY_HOME}/setup-env.sh" ]] && source "${MY_HOME}/setup-env.sh" || { echo "ERROR: MY_HOME not defined or does not contain srtup-env.sh" 1>&2 ; exit 1; }

Answer 2

[[ -e ${MY_HOME}/setup-env.sh ]] && { source "${MY_HOME}/setup-env.sh"; exit; }; echo "ERROR: MY_HOME not defined or does not contain setup-env.sh" >&2; exit 1

或者如果非bash：

test -e "${MY_HOME}/setup-env.sh" && { . "${MY_HOME}/setup-env.sh"; exit; }; echo "ERROR: MY_HOME not defined or does not contain setup-env.sh" >&2; exit 1

对我来说，它实际上不是一个“单行”，而只是一种浓缩形式。