python - Django 应用程序安装脚本 - 如何将应用程序添加到 INSTALLED_APPS 设置？

Question

我已经编写了一个 Django 应用程序，现在我希望能够轻松地在多个服务器上部署。

基本安装是:

1. 将应用程序文件夹复制到 Django 项目文件夹中
2. 将其添加到 settings.py 中的 INSTALLED_APPS
3. 运行./manage.pycollectstatic

这个特定的应用程序不需要使用数据库，但如果需要，我会使用 South 并运行 ./manage.py migrate，但那是另一个故事了。

我遇到问题的部分是#2。我不想每次都手动编辑这个文件。更新最简单/最可靠的方法是什么？

我想我可以使用 inspect 模块来查找变量，然后以某种方式附加它，但我没有任何运气。 inspect.getsourcelines 找不到变量。

Answer 1

您可以使用 bash 修改 settings.py。

#set $SETTINGS_FILE variable to full path of the your django project settings.py file
SETTINGS_FILE="/path/to/your/django/project/settings.py"
# checks that app $1 is in the django project settings file
is_app_in_django_settings() {
    # checking that django project settings file exists
    if [ ! -f $SETTINGS_FILE ]; then
        echo "Error: The django project settings file '$SETTINGS_FILE' does not exist"
        exit 1
    fi
    cat $SETTINGS_FILE | grep -Pzo "INSTALLED_APPS\s?=\s?\[[\s\w\.,']*$1[\s\w\.,']*\]\n?" > /dev/null 2>&1
    # now $?=0 if app is in settings file
    # $? not 0 otherwise
}

# adds app $1 to the django project settings
add_app2django_settings() {
    is_app_in_django_settings $1
    if [ $? -ne 0 ]; then
        echo "Info. The app '$1' is not in the django project settings file '$SETTINGS_FILE'. Adding."
        sed -i -e '1h;2,$H;$!d;g' -re "s/(INSTALLED_APPS\s?=\s?\[[\n '._a-zA-Z,]*)/\1    '$1',\n/g" $SETTINGS_FILE
        # checking that app $1 successfully added to django project settings file
        is_app_in_django_settings $1
        if [ $? -ne 0 ]; then
            echo "Error. Could not add the app '$1' to the django project settings file '$SETTINGS_FILE'. Add it manually, then run this script again."
            exit 1
        else
            echo "Info. The app '$1' was successfully added to the django settings file '$SETTINGS_FILE'."
        fi
    else
        echo "Info. The app '$1' is already in the django project settings file '$SETTINGS_FILE'"
    fi
}

用途:

add_app2django_settings "my_app"