diff --git a/notes/bf-5g04q.md b/notes/bf-5g04q.md new file mode 100644 index 0000000..aec7139 --- /dev/null +++ b/notes/bf-5g04q.md @@ -0,0 +1,218 @@ +# Verification Note: bf-5g04q - Examine diagnostic file format and structure + +## Task +Understand the format and structure of the diagnostic output files found in the previous step (bf-3e0vl). + +## Acceptance Criteria - ALL PASS + +### ✅ PASS: File format is identified (text/JSON/structured/etc.) +Identified **four distinct diagnostic file formats** in the pdftract project: + +#### 1. Compiler/Build Output Format +- **Example file**: `notes/bf-677eo-output.txt` (106KB, 2967 lines) +- **Format**: Plain text with structured compiler diagnostic messages +- **Purpose**: Rust compiler warnings, dead code analysis, and cfg condition checks + +#### 2. Cargo Build Stderr Format +- **Example file**: `target/debug/build/pdftract-core-ffeb7d8a650f4c25/stderr` (11 lines) +- **Format**: Key-value pairs with `cargo:warning=` prefix +- **Purpose**: Build system warnings about missing optional checksum files + +#### 3. JSON Debug Output Format +- **Example files**: `notes/bf-5ucbr-pdftract-debug-output.json` (663 bytes) +- **Format**: Structured JSON with schema version +- **Purpose**: Extraction results with metadata, diagnostics array, and structured data + +#### 4. Expected Diagnostics Format (Test Fixtures) +- **Example files**: `tests/error_recovery/fixtures/*.expected_diagnostics.json` +- **Format**: JSON with test expectations +- **Purpose**: Define expected diagnostic codes and counts for conformance testing + +### ✅ PASS: Overall structure is understood and documented + +#### Compiler/Build Output Structure: +``` +warning: + --> :: + | + | + | + | + = note: + = help: (optional) +``` + +**Pattern characteristics**: +- Multi-line diagnostic messages with code context +- ASCII art-style pointers (--> and |) +- Structured metadata (= note, = help) +- File locations with line/column numbers + +#### Cargo Build Stderr Structure: +``` +cargo:warning= +``` + +**Pattern characteristics**: +- Flat list of key-value pairs +- Each line is a complete warning message +- No hierarchical structure +- Cargo build system integration format + +#### JSON Debug Output Structure: +```json +{ + "schema_version": "1.0", + "fingerprint": "pdftract-v1:", + "metadata": { + "page_count": 0, + "block_count": 0, + "cache_status": "skipped", + "diagnostics": [] + }, + "pages": [], + "attachments": [], + "form_fields": [], + "javascript_actions": [], + "links": [], + "signatures": [], + "threads": [] +} +``` + +**Pattern characteristics**: +- Schema versioned (1.0) +- Empty arrays for optional features +- Metadata object with diagnostic array +- Fingerprint for change detection + +#### Expected Diagnostics Structure: +```json +{ + "description": "", + "expected_diagnostics": [ + { + "code": "STRUCT_MISSING_KEY", + "min_count": 10, + "description": "" + } + ], + "expected_pages": "10", + "expected_default_mediabox": "612x792 letter size for all pages" +} +``` + +**Pattern characteristics**: +- Test scenario metadata +- Expected diagnostic codes with minimum counts +- Expected output values (page count, defaults) + +### ✅ PASS: Encoding and line endings are noted + +#### File Encoding: +- **All diagnostic files**: ASCII/UTF-8 compatible +- **First bytes**: + - Compiler output: `77 61 72 6e 69 6e 67 3a 20` ("warning: ") + - JSON output: `7b 0a` ("{\n") + - Build stderr: `63 61 72 67 6f 3a 77 61 72 6e 69 6e 67 3d` ("cargo:warning=") + +#### Line Endings: +- **All files use Unix line endings**: `\n` (0x0a) +- **No Windows line endings**: No `\r\n` sequences found +- **Hexdump verification**: All line breaks show as `0a` (LF only) + +#### File Sizes: +- **Compiler output**: Large (106KB, 2967 lines) - comprehensive diagnostic data +- **Build stderr**: Small (11 lines) - minimal build warnings +- **JSON debug**: Small (663 bytes) - structured extraction results +- **Expected diagnostics**: Small (200-500 bytes) - test fixtures + +### ✅ PASS: Note is created documenting the format findings + +This verification note documents all identified diagnostic file formats, their structures, encoding, and line endings. + +## File Location Patterns + +### Build Directory Diagnostics: +- **Path**: `target/debug/build//stderr` +- **One per build crate** - ~150+ stderr files total +- **Only 10-15 are non-empty** (most builds have no warnings) +- **Naming**: Crate-specific directory with hash suffix + +### Test Output Diagnostics: +- **Path**: `notes/` directory +- **Naming pattern**: `--output.` +- **Examples**: + - `bf-677eo-output.txt` - Full compiler output + - `bf-5ucbr-pdftract-debug-output.json` - JSON extraction results + - `bf-694ie-extract.log` - Extraction operation logs + - `bf-694ie-help.log` - CLI help output + +### Test Fixture Diagnostics: +- **Path**: `tests/error_recovery/fixtures/` +- **Naming pattern**: `.expected_diagnostics.json` +- **Purpose**: Define expected diagnostic codes for conformance testing + +## Metadata and Wrapper Analysis + +#### Compiler Output Wrapper: +- **No outer metadata** - raw compiler output +- **Internal structure**: Each warning is self-contained with file location +- **No header/footer** - starts immediately with first warning +- **No summary statistics** - just raw diagnostic stream + +#### JSON Output Wrapper: +- **Schema version** in root object (`"schema_version": "1.0"`) +- **Fingerprint** for change detection (`"fingerprint": "pdftract-v1:"`) +- **Metadata section** with diagnostic messages array +- **Empty arrays** for unextracted features (attachments, form_fields, etc.) + +#### Expected Diagnostics Wrapper: +- **Description field** - human-readable test scenario +- **Expected values section** - page counts, defaults +- **Diagnostic codes array** - structured test expectations + +## Field Organization Patterns + +#### Compiler Output: +- Hierarchical: warning → location → code context → notes +- Visual hierarchy using ASCII art (--> and |) +- Nested structure within each diagnostic message + +#### JSON Output: +- Flat key-value structure at root level +- Nested metadata object +- Arrays for multi-value features (pages, attachments, etc.) + +#### Expected Diagnostics: +- Flat structure with three main sections +- Array of expected diagnostic objects +- Key-value pairs for expectations + +## Encoding Compatibility + +All diagnostic files are **ASCII-compatible UTF-8**: +- Compiler output uses ASCII characters (7-bit clean) +- JSON output uses standard ASCII JSON syntax +- No BOM (Byte Order Mark) detected +- Safe to parse with standard text/JSON parsers + +## Recommendations + +1. **For parsing compiler output**: Use line-by-line parsing looking for "warning:" or "error:" prefixes +2. **For JSON output**: Parse with standard JSON parser, check schema_version first +3. **For build stderr**: Simple key-value parsing after "cargo:warning=" prefix +4. **For test fixtures**: Validate against expected_diagnostics schema + +## Files Examined + +1. `/home/coding/pdftract/notes/bf-677eo-output.txt` (106KB, 2967 lines) +2. `/home/coding/pdftract/notes/bf-5ucbr-pdftract-debug-output.json` (663 bytes) +3. `/home/coding/pdftract/target/debug/build/pdftract-core-ffeb7d8a650f4c25/stderr` (11 lines) +4. `/home/coding/pdftract/tests/error_recovery/fixtures/missing_mediabox_all_pages.expected_diagnostics.json` +5. `/home/coding/pdftract/notes/bf-694ie-help.log` (1.4KB) +6. `/home/coding/pdftract/notes/bf-3j4ec-json-output.txt` (451 bytes) + +## Conclusion + +All acceptance criteria PASS. Four distinct diagnostic file formats were identified, their structures analyzed and documented, encoding (ASCII/UTF-8) and line endings (Unix \n) verified, and this comprehensive note created documenting all findings.