Bash腳本，如果或

Question

我試圖獲得一個if或在bash中工作，但它不起作用。 出現以下錯誤

./install.sh: line 33: conditional binary operator expected
./install.sh: line 33: syntax error near `$CURRENT_OS'
./install.sh: line 33: `elif [[ $CURRENT_OS =~ "CYGWIN" || [ $CURRENT_OS =~ "MSYS" ]]; then'

這是我當前的腳本

#!/bin/bash

CURRENT_OS=$(uname)

echo "Installing dotfiles"

echo "Initializing submodule(s)"
#git submodule update --init --recursive

# Used for setting up a mac
if [ $CURRENT_OS == "Darwin" ]; then
    echo "Running OSX"
elif [[ $CURRENT_OS =~ "CYGWIN" || [ $CURRENT_OS =~ "MSYS" ]]; then
    echo $CURRENT_OS
fi

我什至嘗試過

elif [ $CURRENT_OS =~ "CYGWIN" || [ $CURRENT_OS =~ "MSYS" ]; then

我得到這個錯誤

./install.sh: line 33: [: missing `]'
./install.sh: line 33: [: =~: binary operator expected

Answer 1

您在elif分支的第二個條件之前有一個額外的[ 。

elif [[ $CURRENT_OS =~ "CYGWIN" || [ $CURRENT_OS =~ "MSYS" ]]; then
                                   ^ -- Remove this

Answer 2

為了補充史蒂文的有用答案 ：

您必須使用[[ ... ]]而不是[ ... ]來使用Bash的正則表達式匹配運算符=~ ：

[ foo =~ o ] # !! FAILS, due to use of [ ... ]: "[: =~: binary operator expected"

[[ foo =~ o ]] # OK - [[ ... ]] required

---

使用慣用的Bash，您將獲得以下條件：

if [[ $CURRENT_OS == 'Darwin' ]]; then
    echo "Running OSX"
elif [[ $CURRENT_OS =~ 'CYGWIN' || $CURRENT_OS =~ 'MSYS' ]]; then
    echo "$CURRENT_OS"
fi