Summary

• astro dev pytest now bind-mounts dags/, tests/, plugins/, and include/ from the host into the ephemeral pytest container, matching the volume mounts that astro dev start provides via docker-compose
• Removes the previous docker cp approach for dags/ (replaced by bind mount) and the post-exit docker cp of include/ back to host (now automatic via bind mount)
• .astro/ continues to use docker cp due to inconsistent .dockerignore behavior across platforms

Problem

astro dev start bind-mounts dags/, tests/, plugins/, and include/ via docker-compose volumes. However, astro dev pytest created a one-off container using docker create and only copied dags/ and .astro/ via docker cp. This meant:

• tests/ was not available in the pytest container unless baked into the image with COPY tests ./tests
• plugins/ and include/ were also missing
• Users had to maintain COPY directives in their Dockerfile solely for astro dev pytest, causing unnecessary image rebuilds and inconsistency with the astro dev start workflow

Traced to airflow/docker_image.go Pytest() function — the docker create call had no -v flags, and only dags/ and .astro/ were copied post-creation.

Fix

Add -v bind mount flags to the docker create call for all four directories (dags/, tests/, plugins/, include/), matching the compose template mounts. This eliminates the need for docker cp of dags/ and ensures all host directories are visible to pytest.

Test plan

• Unit tests pass (go test ./airflow/ -run TestDockerImagePytest)
• Full airflow package tests pass (go test ./airflow/)
• Manual: default test file runs
• Manual: host-only probe file in tests/ found via bind mount
• Manual: -i <custom-image> with host-only file (customer's exact repro) — previously broken, now works
• Manual: cross-directory access (read plugins/, include/ files from tests)
• Manual: write to include/ from inside container persists on host
• Manual: empty and missing directories handled (Docker creates them)
• Manual: --args, --env flags work
• Manual: .astro/test_dag_integrity_default.py works
• Manual: failing tests still propagate exit code 1

🤖 Generated with Claude Code