Cake supports the concept of external configuration, to allow the internals of how Cake operates to be controlled, based on a specified priority, from either:
- Environment variables
- A configuration file
- Arguments passed into Cake
These configuration options are prioritised in the order shown above. This means the configuration file overrides any environment variables, and arguments passed directly into Cake override both environment variables and configuration file settings.
As an example of where this overridable configuration can be applied, let's look at how Cake determines where to download NuGet packages from. By default, it does this by downloading the NuGet packages user configured sources. However, it may be necessary (for example, when running in an offline/local environment) to download these NuGet packages from an alternative source. This is where the Cake Configuration comes into play.
Refer to the default configuration values for a list of all available configuration options.
By creating an Environment variable with the name of
CAKE_NUGET_SOURCE and setting the value to the URL that is required, Cake will use this alternative download source, rather than the defaults.
Alternatively, you can create a
cake.config file with the following content:
; The configuration file for Cake. [Nuget] Source=https://mycustomurl
Specifying a configuration value within a configuration file will override the same configuration value stored within an equivalent environment variable.
The configuration file should be located in the same directory as your Cake script.
Finally, you can specify an input parameter directly to Cake, in the following format:
dotnet cake --nuget_source=http://mycustomurl
Passing a configuration value directly to Cake will override the same configuration value stored within an environment variable and also any stored in a local configuration file.
When configuring NuGet sources in both
cake.config, and via the command line, multiple sources can be supplied by joining them with a semicolon:
dotnet cake --nuget_source=http://mycustomurl;http://myothercustomurl