為什么我的bash腳本在空白區域打破？

Question

我有一個shell腳本，它打破了Virtualhost和*之間的第42行空間。 因此，唯一與控制台相呼應的是

<VirtualHost 

我想要發生的是我的整個字符串被回顯到控制台。

<VirtualHost *:80>
        DocumentRoot /Applications/MAMP/htdocs/web
        ServerName web.localhost
        <Directory /Applications/MAMP/htdocs/web>
        Options Indexes FollowSymLinks MultiViews +Includes
        AllowOverride All 
        Order allow,deny
        allow from all 
        </Directory>
</VirtualHost>

這是我的腳本供參考：

#!/bin/bash
# This script should be used to automate the web site installation

checkFileForString ()
{
    # $1 = file
    # $2 = regex
    # $3 = text to be added
    declare file=$1
    declare regex=$2
    declare file_content=$( cat "${file}" )

    if [[ ! " $file_content " =~ $regex ]]; then
        echo "$3" #>> $file
    else
        replaceStringInFile $file $regex $3
    fi
}

replaceStringInFile ()
{
    # $1 = file
    # $2 = old string
    # $3 = new string

    sed -i -e 's|${2}|${3}|' $1
}

createFile ()
{
    # $1 = file
    declare fileToCheck=$1

    if [ ! -f $fileToCheck ]; then
       touch $fileToCheck   
    fi
}

# Add vhosts to httpd-vhosts.conf
echo "Adding vhosts to httpd-vhosts.conf"
currentFile="/Applications/MAMP/conf/apache/extra/httpd-vhosts.conf"
currentRegex="<VirtualHost\s[*]:80>\s+DocumentRoot\s/Applications/MAMP/htdocs/web\s+ServerName\sweb.localhost"
newText="<VirtualHost *:80>
    DocumentRoot /Applications/MAMP/htdocs/web
    ServerName web.localhost
    <Directory /Applications/MAMP/htdocs/web>
    Options Indexes FollowSymLinks MultiViews +Includes
    AllowOverride All
    Order allow,deny
    allow from all
    </Directory>
</VirtualHost>
"

checkFileForString $currentFile $currentRegex $newText

Answer 1

您需要將變量放在雙引號中以展開它們而不進行單詞拆分和通配符擴展。

checkFileForString "$currentFile" "$currentRegex" "$newText"

您的腳本中的另一個問題是replaceStringInFile()函數。 變量僅在雙引號內擴展，而不是單引號。 所以它應該是：

sed -i -e "s|${2}|${3}|" "$1"