feat(graph): add suggest-base subcommand with collection impact analysis#1103
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dhellmann wants to merge 1 commit intopython-wheel-build:mainfrom
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feat(graph): add suggest-base subcommand with collection impact analysis#1103dhellmann wants to merge 1 commit intopython-wheel-build:mainfrom
dhellmann wants to merge 1 commit intopython-wheel-build:mainfrom
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Here's some sample output for some downstream collections. Using the command: Output (click to expand)produced this output: |
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Actionable comments posted: 3
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@src/fromager/commands/graph.py`:
- Around line 1050-1082: base-only (orphan) packages from the supplied base
graph are not computed or emitted; compute orphan_packages = base_packages -
union(*collections) after base_packages is populated, then pass this
orphan_packages into the output helpers (_suggest_base_json and
_suggest_base_table) so the JSON/table include base packages that no analyzed
collection references; update the calls to _suggest_base_json and
_suggest_base_table to accept the new orphan_packages argument and update those
functions' signatures to render the orphan set (and keep existing fields like
in_base annotation intact).
- Around line 1041-1048: The collections dict is keyed by a non-unique short
name (from _get_collection_name(path)), causing collisions; instead key the dict
by a unique identifier (e.g., the collection file path or its resolved string)
while still computing and storing the short/display name from
_get_collection_name(path) for output. In the loop that iterates
collection_graphs, use a unique key like str(path.resolve()) or path.as_posix()
for collections[key] = pkgs and keep name = _get_collection_name(path) only for
logging/display, ensuring no silent overwrites of other collections.
In `@tests/test_graph_commands.py`:
- Around line 664-688: The tests test_suggest_base_too_few_graphs and
test_suggest_base_invalid_min_collections are currently catching any Exception;
change both pytest.raises calls to specifically expect click.UsageError (e.g.,
pytest.raises(click.UsageError, match="...")) so the validation path is
asserted; also ensure the test module imports click (add "import click" at top
if missing) and keep the existing match strings unchanged to verify the error
message.
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src/fromager/commands/graph.pytests/test_graph_commands.py
Analyzes multiple collection graph files to find packages that appear across >= N collections. These shared packages are candidates for a "base" collection built once and reused across parallel collection builds. Also computes collection impact analysis showing how the proposed base would affect each input collection: remaining package counts per collection and cross-collection counts for remaining packages, helping identify candidates for a secondary base. New public command: fromager graph suggest-base GRAPH [GRAPH ...] Options: --min-collections INT threshold (default: 50% of input graphs, rounded up) --base PATH mark packages already in an existing base graph --format table|json output format (default: table) Implementation: - _get_collection_packages(): load graph, return canonical names - _find_shared_packages(): find overlap, sort by count desc then name asc - _compute_collection_impact(): per-collection remaining package analysis - _suggest_base_table(): rich MARKDOWN table output with impact sections - _suggest_base_json(): structured JSON with metadata, candidates, and collection_impact key - _suggest_base_impl(): testable core extracted from the click command Tests: 13 new unit tests covering helpers, table/JSON output, --base flag, impact analysis, and error cases. Closes: python-wheel-build#973 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Signed-off-by: Doug Hellmann <dhellmann@redhat.com>
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smoparth
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May 1, 2026
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I was planning to work this up, but held off because #1030 hasn't reached consensus yet and wanted to avoid churn. Also, I was thinking the two commands share some helpers, so I was waiting to align on the approach first. Thanks for getting this done though -- glad it's moving forward! 😄 |
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smoparth
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May 4, 2026
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Summary
graph suggest-basecommand to identify packages shared acrossmultiple collections as candidates for a base collection
after removing base candidates, and cross-collection counts to help
identify secondary base candidates
collection_impactsectionin both
Test Plan
hatch run test:test tests/test_graph_commands.pyhatch run lint:fix && hatch run mypy:check src/fromager/commands/graph.pyfromager graph suggest-base graphs/*.json 2>/dev/null | lessfromager graph suggest-base --format json graphs/*.json 2>/dev/null | python3 -m json.tool | lessCloses: #973
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