ImpTune/.planning/phases/02-driver-management/02-01-SUMMARY.md

phase, plan, subsystem, tags, dependency_graph, tech_stack, key_files, decisions, metrics, requirements-completed

phase	plan	subsystem	tags	dependency_graph	tech_stack	key_files	decisions	metrics	requirements-completed
02	01	inf-parser	tdd inf-parsing encoding-detection token-resolution driver-management	requires provides affects inf-parser-service 02-02-upload-endpoint 02-03-drivers-ui	added patterns RawConfigParser-strict-false BOM-sniffing optionxform-str set-dedup-sorted	created modified imptune/services/__init__.py imptune/services/inf_parser.py tests/test_inf_parser.py tests/fixtures/sample.inf tests/fixtures/sample_utf16.inf tests/fixtures/sample_multi_model.inf	optionxform=str on RawConfigParser to preserve DriverDesc key casing; strings dict still uses lowercased keys for case-insensitive %TOKEN% lookup configparser.RawConfigParser(strict=False) avoids DuplicateOptionError on real INFs with repeated model entries UTF-16 fixture written as binary via Python encode('utf-16') — not as a text file — to guarantee correct BOM bytes	duration completed tasks files ~2.5 min 2026-04-10 1 6	DRV-02

Phase 02 Plan 01: INF Parser Service Summary

One-liner: stdlib configparser + BOM-sniffing INF parser with %TOKEN% resolution, multi-model deduplication, architecture detection, and unused-file flagging.

What Was Built

imptune/services/inf_parser.py — a pure-function INF parser with:

• ParsedInf dataclass exposing driver_names, inf_filename, architecture, has_cat_file, unused_files
• _detect_encoding(raw: bytes) -> str — BOM-sniffing: \xff\xfe/\xfe\xff -> utf-16, \xef\xbb\xbf -> utf-8-sig, else cp1252
• _resolve_tokens(value, strings) — regex %([^%]+)% expansion
• parse_inf(inf_text, inf_filename, zip_names) -> ParsedInf — RawConfigParser(strict=False, delimiters=('=',)) with optionxform=str; [Manufacturer] -> Models section discovery; NTamd64/NTarm64/NTx86/undecorated detection; set-based dedup; sorted output

Three fixture files support the test suite: sample.inf (ANSI with %TOKEN%), sample_utf16.inf (UTF-16 LE BOM binary), sample_multi_model.inf (NTamd64 + undecorated sections).

Tasks

#	Task	Status	Commit
1	INF parser with TDD (RED then GREEN)	Complete	290106d (RED), 5056922 (GREEN)

Test Results

• 16 tests in tests/test_inf_parser.py — all pass
• Full suite: 40 tests pass, 0 failures, 0 regressions

Deviations from Plan

Auto-fixed Issues

1. [Rule 1 - Bug] configparser key lowercasing mangled DriverDesc literal names

• Found during: Task 1, GREEN phase (first test run)
• Issue: configparser defaults optionxform = str.lower, so the literal key Acme SuperPrint 9000 was returned as acme superprint 9000. The test assert "Acme SuperPrint 9000" in result.driver_names failed.
• Fix: Set parser.optionxform = str to preserve original casing of option keys. The [Strings] dict still explicitly lowercases keys (strings[key.lower()]) for case-insensitive token resolution.
• Files modified: imptune/services/inf_parser.py
• Commit: 5056922

Note: The plan specified strict=False and RawConfigParser correctly but did not mention optionxform=str. This is a real-INF edge case documented in the pitfalls section of 02-RESEARCH.md (implicitly — the note says "Strings dict keys must be lowercased" without clarifying that DriverDesc keys also get lowercased by default).

Test Count Deviation

The plan specified 11 test functions; 16 were written. The extra 5 cover:

• test_detect_encoding_utf16be (UTF-16 BE BOM variant)
• test_architecture_detection_amd64 (split from the combined architecture test)
• test_architecture_detection_arm64
• test_architecture_detection_undecorated
• test_architecture_detection_mixed

This provides more granular failure diagnosis and meets the min_lines: 80 artifact requirement.

Self-Check

• imptune/services/inf_parser.py exists
• imptune/services/__init__.py exists
• tests/test_inf_parser.py exists (>80 lines)
• tests/fixtures/sample.inf exists
• tests/fixtures/sample_utf16.inf exists (UTF-16 LE BOM binary)
• tests/fixtures/sample_multi_model.inf exists
• RED commit: 290106d
• GREEN commit: 5056922

Self-Check: PASSED