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直到等待进程完成的语句被忽略

tag-icon • tag-icon bash shell-script osx
直到等待进程完成的语句被忽略

我正在尝试在不使用 sudo 权限的情况下自动安装 git，一个不错（但缓慢）的解决方法是安装 Xcode，它与 git 捆绑在一起，可以xcode-select --install由标准用户调用

#!/bin/bash
# check if user has git installed
which git &> /dev/null
OUT=$?
sleep 3


# if output of git check is not 0(not foud) then run installer
if [ ! $OUT -eq 0 ]; then
    xcode_dialog () {
        XCODE_MESSAGE="$(osascript -e 'tell app "System Events" to display dialog "Please click install when Command Line Developer Tools appears"')"
        if [ "$XCODE_MESSAGE" = "button returned:OK" ]; then
            xcode-select --install
        else
            echo "You have cancelled the installation, please rerun the installer."
        fi
    }
    xcode_dialog
fi

# get xcode installer process ID by name and wait for it to finish
until  [ ! "$(pgrep -i 'Install Command Line Developer Tools')" ]; do
    sleep 1
done

echo 'Xcode has finished installing'

which git &> /dev/null
OUT=$?
if [ $OUT = 0 ]; then
    echo 'Xcode was installed incorrectly'
    exit 1
fi

然而，我的until语句被完全忽略，并且几乎一旦XCODE_MESSAGE返回 OK 就会触发对 git 的第二次检查。有人知道如何更好地实现等待安装程序完成的逻辑吗？

答案1

我会稍微改变您在脚本中遵循的方法：检查“git”是否存在，而不是检查安装过程是否未运行：

#!/bin/bash

# check if user has git installed and propose to install if not installed
if [ "$(which git)" ]; then
        echo "You already have git. Exiting.."
        exit
else
        XCODE_MESSAGE="$(osascript -e 'tell app "System Events" to display dialog "Please click install when Command Line Developer Tools appears"')"
        if [ "$XCODE_MESSAGE" = "button returned:OK" ]; then
            xcode-select --install
        else
            echo "You have cancelled the installation, please rerun the installer."
            # you have forgotten to exit here
            exit
        fi
fi

until [ "$(which git)" ]; do
        echo -n "."
        sleep 1
done
echo ""

echo 'Xcode has finished installing'

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