Configuration

The whole cache warmup process can be customized with a various set of configuration options. Read more about how to provide those configuration options on this page.

Config adapters

Each configuration option can be set by a dedicated config adapter. At the moment, the following adapters are supported:

1. Configuration file
2. Command parameters
3. Environment variables

IMPORTANT

Config adapters are loaded from top to bottom. That means, adapters which are loaded later receive higher priority and may override configuration options provided by previously loaded config adapters.

Configuration file

You can provide configuration files in the following formats:

• JSON
• PHP
• YAML

JSON and YAML

For JSON and YAML files, the name of each configuration option can be looked up in the configuration reference. It must be written in lowerCamelCase, e.g. the --crawler-options command parameter must be configured as crawlerOptions:

JSON

{
    "sitemaps": [
        "https://www.example.org/sitemap.xml"
    ],
    "exclude": [
        "*foo*"
    ]
}

YAML

sitemaps:
  - https://www.example.org/sitemap.xml
exclude:
  - '*foo*'

PHP

PHP configuration files must return a closure which receives the current instance of EliasHaeussler\CacheWarmup\Config\CacheWarmupConfig. They may also return a (new) instance to override the current one:

use EliasHaeussler\CacheWarmup;

return static function (CacheWarmup\Config\CacheWarmupConfig $config) {
    $config->addSitemap(
        CacheWarmup\Sitemap\Sitemap::createFromString('https://www.example.org/sitemap.xml'),
    );
    $config->addExcludePattern(
        CacheWarmup\Config\Option\ExcludePattern::create('*foo*'),
    );

    return $config;
};

Command parameters

The library accepts a various set of command parameters. Each command parameter reflects an available configuration option:

./cache-warmup.phar "https://www.example.org/sitemap.xml" --exclude "*foo*"

In addition, the --config option allows to provide the path to a configuration file:

./cache-warmup.phar --config cache-warmup.json

All available command parameters are reflected in the configuration reference. You can also run the command with --help to see a detailed explanation of all available command parameters.

Environment variables

Several configuration options can also be configured using environment variables. Each environment variable is prefixed with CACHE_WARMUP_, followed by the configuration option in SCREAMING_SNAKE_CASE.

Example:

• The sitemaps option is expected as CACHE_WARMUP_SITEMAPS
• The crawlerOptions option is expected as CACHE_WARMUP_CRAWLER_OPTIONS

Value mapping

The following value transformation between environment variables and configuration options exists:

Lists: Values must be separated by comma:

CACHE_WARMUP_SITEMAPS="https://www.example.org/sitemap.xml, /var/www/html/sitemap.xml"

Booleans: Values matching true, yes or 1 are interpreted as true:

CACHE_WARMUP_PROGRESS="true"
CACHE_WARMUP_PROGRESS="yes"
CACHE_WARMUP_PROGRESS="1"

All other values are converted to their expected type:

# Internally converted to an integer value
CACHE_WARMUP_LIMIT="50"