Deployment progress events from the backend

[mmarchetti]

Resolves #202

Intent

• Sends progress events during R and Python package restores
• Cleans up duplicate attributes in event messages

Type of Change

• Bug Fix
• New Feature
• Breaking Change

Automated Tests

Directions for Reviewers

Deploy a Python app that requires a new environment to be built, and one that doesn't. Verify logs/event stream contains events corresponding to the package downloads/installs in the Connect app log. Note that Python packages don't always log download or install messages, depending on whether the package was in the download cache, or is present in the base virtualenv with the same or different version.

[tdstein]

Functionally LGTM. Just nit questions about Go conventions.

[kgartland-rstudio]

Verified! Now seeing information about Python environments on Connect:

Fresh environment deployment:

SSE will send: {"Time":"2023-09-15T15:01:46.98406-04:00","Type":"publish/restorePythonEnv/log","Data":{"Level":"INFO","Message":"2023/09/15 19:01:46.620758558 Creating environment: g62yybu96Nm-42QMs6oLZw","source":"serverLog"}}
time=2023-09-15T15:01:51.729-04:00 level=INFO msg="2023/09/15 19:01:50.992817249 Collecting pip" source=serverLog event_op=publish/restorePythonEnv
SSE will send: {"Time":"2023-09-15T15:01:51.729006-04:00","Type":"publish/restorePythonEnv/log","Data":{"Level":"INFO","Message":"2023/09/15 19:01:50.992817249 Collecting pip","source":"serverLog"}}
time=2023-09-15T15:01:51.729-04:00 level=INFO msg="2023/09/15 19:01:51.119678062 Using cached https://files.pythonhosted.org/packages/50/c2/e06851e8cc28dcad7c155f4753da8833ac06a5c704c109313b8d5a62968a/pip-23.2.1-py3-none-any.whl" source=serverLog event_op=publish/restorePythonEnv
SSE will send: {"Time":"2023-09-15T15:01:51.729156-04:00","Type":"publish/restorePythonEnv/log","Data":{"Level":"INFO","Message":"2023/09/15 19:01:51.119678062 Using cached https://files.pythonhosted.org/packages/50/c2/e06851e8cc28dcad7c155f4753da8833ac06a5c704c109313b8d5a62968a/pip-23.2.1-py3-none-any.whl","source":"serverLog"}}
time=2023-09-15T15:01:52.350-04:00 level=INFO msg="2023/09/15 19:01:51.756526808 Collecting setuptools" source=serverLog event_op=publish/restorePythonEnv

Cached Environment Deployment:

SSE will send: {"Time":"2023-09-15T14:45:10.25166-04:00","Type":"publish/restorePythonEnv/log","Data":{"Level":"INFO","Message":"2023/09/15 18:45:10.089103994 Using cached environment: Pa5tKYxKMSNr6xGrmbr8Nw","source":"serverLog"}}
time=2023-09-15T14:45:11.492-04:00 level=INFO msg="2023/09/15 18:45:11.455331723 Packages in the environment: aiofiles==23.2.1, anyio==3.6.2, appdirs==1.4.4, asgiref==3.6.0, certi
requests
fi==2020.12.5, click==8.1.3, distlib, fastapi==0.95.2, filelock, h11==0.14.0, idna==3.4, pydantic==1.10.7, PyJWT==2.7.0, semver==2.13.0, six==1.16.0, sniffio==1.3.0, starlette==0.27.0, tornado, typing_extensions==4.5.0, uvicorn==0.22.0, virtualenv, websockets==11.0.3, " source=serverLog event_op=publish/restorePythonEnv
SSE will send: {"Time":"2023-09-15T14:45:11.492115-04:00","Type":"publish/restorePythonEnv/log","Data":{"Level":"INFO","Message":"2023/09/15 18:45:11.455331723 Packages in the environment: aiofiles==23.2.1, anyio==3.6.2, appdirs==1.4.4, asgiref==3.6.0, certifi==2020.12.5, click==8.1.3, distlib, fastapi==0.95.2, filelock, h11==0.14.0, idna==3.4, pydantic==1.10.7, PyJWT==2.7.0, semver==2.13.0, six==1.16.0, sniffio==1.3.0, starlette==0.27.0, tornado, typing_extensions==4.5.0, uvicorn==0.22.0, virtualenv, websockets==11.0.3, ","source":"serverLog"}}
time=2023-09-15T14:45:11.492-04:00 level=INFO msg="2023/09/15 18:45:11.456554876 Creating lockfile: python/requirements.txt.lock" source=serverLog event_op=publish/restorePythonEnv