bash选择菜单获取索引

Question

例

#!/bin/bash

INSTALL_PATH="/usr/local"
BFGMINER_INSTALL_PATH="${INSTALL_PATH}/bfgminer"
BFGMINER_REPO="https://github.com/luke-jr/bfgminer.git"

list_last_ten_bfgminer_tags () {
    cd ${BFGMINER_INSTALL_PATH}
    git for-each-ref --format="%(refname)" --sort=-taggerdate --count=10 refs/tags | cut -c 6-
}

clone_bfgminer () {
    cd ${INSTALL_PATH}
    git clone ${BFGMINER_REPO} ${BFGMINER_INSTALL_PATH}
}

echo "select number to switch tag or n to continue"
select result in master $(list_last_ten_bfgminer_tags)
do

    # HOW DO I CHECK THE INDEX???????  <================================= QUESTION
    if [[ ${result} == [0-9] && ${result} < 11 && ${result} > 0 ]]
        then
            echo "switching to tag ${result}"
            cd ${BFGMINER_INSTALL_PATH}
            git checkout ${result}
    else
        echo "continue installing master"
    fi

    break
done

因此,如果用户输入1,则case语句会检查文本上的匹配项,如何在1上匹配？

Answer 1

使用$REPLY变量

PS3="Select what you want>"
select answer in "aaa" "bbb" "ccc" "exit program"
do
case "$REPLY" in
    1) echo "1" ; break;;
    2) echo "2" ; break;;
    3) echo "3" ; break;;
    4) exit ;;
esac
done

Answer 2

您无需检查选择了哪个值; 你可以简单地使用它.你唯一不希望对证是master,这是简单的事.

select result in master $(list_last_ten_bfgminer_tags)
do
    if [[ $result = master ]]; then
        echo "continue installing master"
    elif [[ -z "$result" ]]; then
        continue
    else
        echo "switching to tag ${result}"
        cd ${BFGMINER_INSTALL_PATH}
        git checkout ${result}
    fi
    break
done