Exclusions

Planned interface

When exclusions ship, they will be configured as a list of glob patterns under an exclude key in nolapse.yaml:

# Planned — not yet supported
lang: go
warn_threshold: -1.0
fail_threshold: -3.0
exclude:
  - "**/*_generated.go"
  - "internal/testdata/**"
  - "vendor/**"

Patterns will follow standard glob syntax. Matched files will be omitted from the coverage calculation before nolapse compares against the baseline.

Current workarounds

Until exclusions are implemented, you can exclude files at the coverage tool level rather than at the nolapse level.

Go — build tags

Use a build tag to prevent test files or generated files from being instrumented:

//go:build ignore

Or use -coverpkg to limit which packages are measured:

go test -coverpkg=./internal/...,./pkg/... ./...

You can also exclude specific packages by listing only the ones you want:

go test -coverprofile=coverage.out $(go list ./... | grep -v '/vendor/' | grep -v '/generated/')

Go — coverage profile filtering

After generating a coverage profile, strip unwanted lines before nolapse reads it:

go test -coverprofile=coverage.out ./...
grep -v "_generated.go" coverage.out > coverage.filtered.out

Then point nolapse at the filtered profile (exact flag name subject to change in future releases — check nolapse run --help).

Python — pytest `--ignore`

Use pytest --ignore to exclude directories from test collection and coverage measurement:

pytest --cov=src --ignore=src/generated --ignore=tests/fixtures

Or add persistent ignores to pytest.ini / pyproject.toml:

[pytest]
addopts = --ignore=src/generated

[tool.pytest.ini_options]
addopts = "--ignore=src/generated"

Python — `.coveragerc` omit

Use .coveragerc to omit paths from coverage reporting:

[run]
omit =
    src/generated/*
    tests/fixtures/*
    **/conftest.py

Or in pyproject.toml:

[tool.coverage.run]
omit = [
    "src/generated/*",
    "tests/fixtures/*",
]

Tracking the feature

The exclusions feature is tracked as a P1 item on the nolapse roadmap. When it ships, the exclude key will be added to the nolapse.yaml schema and this page will be updated with the full reference.