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將變數傳遞給 cat

tag-icon • tag-icon variable cat here-document
將變數傳遞給 cat

我在 bash 腳本中只有一個變量${PHP_V}，並嘗試傳入 nginx 設定文件，例如：

cat <<'EOF' > /etc/nginx/sites-available/default
server {
    listen 80 default_server; 
    listen [::]:80 default_server; 

    listen 443 ssl default_server; 
    listen [::]:443 ssl default_server; 

    root /vagrant/webroot; 

    index index.php; 

    server_name _; 

    ssl_certificate /etc/nginx/certs/vagrantbox.crt; 
    ssl_certificate_key /etc/nginx/certs/vagrantbox.key;  

    location / { 
        try_files $uri $uri/ /index.php?$args; 
    } 

    location ~ \.php$ { 
        try_files $uri =404; 
        include fastcgi_params; 
        fastcgi_pass unix:/run/php/php${PHP_V}-fpm.sock; 
        fastcgi_index index.php; 
        fastcgi_intercept_errors on; 
        fastcgi_param SCRIPT_FILENAME 
        $document_root$fastcgi_script_name; 
    }
}
EOF

但沒有成功。怎麼做？

答案1

您需要取消引號EOF：

如果引用了word的任何部分，則應透過對word進行移除引號來形成分隔符，並且此處文件行不會被擴展。否則，分隔符號應為單字本身。

如果沒有引用單字的任何部分，則應擴展此處文件的所有行以進行參數擴展、命令替換和算術擴展。

看 ：2.7.4 Here-文檔

但請注意，您的此處文件中有幾處內容需要單獨轉義以防止擴展：

cat <<EOF > /etc/nginx/sites-available/default
server {
    listen 80 default_server; 
    listen [::]:80 default_server; 

    listen 443 ssl default_server; 
    listen [::]:443 ssl default_server; 

    root /vagrant/webroot; 

    index index.php; 

    server_name _; 

    ssl_certificate /etc/nginx/certs/vagrantbox.crt; 
    ssl_certificate_key /etc/nginx/certs/vagrantbox.key;  

    location / { 
        try_files \$uri \$uri/ /index.php?\$args; 
    } 

    location ~ \.php\$ { 
        try_files \$uri =404; 
        include fastcgi_params; 
        fastcgi_pass unix:/run/php/php${PHP_V}-fpm.sock; 
        fastcgi_index index.php; 
        fastcgi_intercept_errors on; 
        fastcgi_param SCRIPT_FILENAME 
        \$document_root\$fastcgi_script_name; 
    }
}
EOF

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