datadog-agent is now built as a go module. However, the build process
is now to be driven by the python invoke tool. While datadog-agent
builds with buildGoModule, some investigation should be done to ensure
we are not missing any integrations or features from the invoke build
system.
This also updates datadog-agent from python 2.7 to 3.x.
One other issue of note: most of the invoke tasks seem to use some git
parsing to get version numbers and the like. This package may need to
be checked for reproducibility issues now.
The override that builds the custom python for integrations-core was
overriding python, but pythonPackages was still being inherited from a
call to `datadog-integrations-core {}`, causing
service.datadog-agent.extraIntegrations to be ignored.
Refactors the process used to build the Datadog core integrations to
be more easily extensible with integrations other than the ones built
and installed by default.
Documentation has been added in relevant parts of the module to
describe how the process works.
As a high-level overview:
The `datadog-integrations-core` attribute in the top-level package set
now accepts an extra parameter.
This parameter is an attribute set where each key is the name of a
Datadog integration as it appears in Datadog's integrations-core
repository[1], and the value is a function that receives the Python
package set and returns the required dependencies of this integration.
For example:
datadog-integrations-core {
ntp = (ps: [ ps.ntplib ]);
};
This would build the default integrations and, additionally, the `ntp`
integration.
To support passing the modified Python environment to the
datadog-agent itself, the `python` key has been moved inside of the
derivation which means that it will be made overridable.
This relates to NixOS/nixpkgs#40399.
[1]: https://github.com/DataDog/integrations-core
