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Fix author extraction for 'Author:Name' format without space
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‎AUTHOR_EXTRACTION_CHANGES.md‎

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# Author Extraction Enhancement - Summary
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## Overview
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Enhanced the author extraction functionality in `scancode-toolkit` to support both `Author:Name` and `Author: Name` formats (with and without space after the colon), while maintaining backward compatibility with existing functionality.
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## Changes Made
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### File: `src/cluecode/linux_credits.py`
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#### 1. Added `re` module import
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- Added `import re` at line 13 to support regex pattern matching
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#### 2. Updated docstring
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- Enhanced module docstring to document the newly supported `Author:` and `Upstream Author:` formats
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- Now lists all supported entry formats
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#### 3. Modified `get_credit_lines_groups()` function
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- **Line 159**: Updated the line filtering condition to detect `Author:` patterns in addition to the standard `N:`, `E:`, `W:` format
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- **Pattern Used**: `r'^(?:Author|Upstream[-\s]*Author):\s*'` (case-insensitive)
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- **Supports**:
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- `Author: Name`
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- `Author:Name` (no space)
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- `Upstream Author: Name`
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- `Upstream-Author: Name` (with hyphen)
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- Case-insensitive matching
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#### 4. Modified `detect_credits_authors_from_lines()` function
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- **Lines 110-125**: Added support for parsing `Author:` format lines
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- **Extraction Pattern**: `r'^(?:Author|Upstream[-\s]*Author):\s*(.+)$'` (case-insensitive)
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- Extracts the name part using group(1) after the colon and optional whitespace
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- Maintains separate `authors` list to collect extracted author names
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- Combines results with existing `names`, `emails`, and `webs` data
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## Regex Patterns
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### Detection Pattern (used in `get_credit_lines_groups`):
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```regex
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r'^(?:Author|Upstream[-\s]*Author):\s*'
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```
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- Detects lines starting with "Author:" or "Upstream Author:" (with or without space/hyphen)
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- Case-insensitive
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### Extraction Pattern (used in `detect_credits_authors_from_lines`):
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```regex
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r'^(?:Author|Upstream[-\s]*Author):\s*(.+)$'
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```
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- Captures everything after the colon and optional whitespace
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- Group 1: The author name (extracted text)
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## Backward Compatibility
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- ✓ All existing functionality preserved
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- ✓ Standard `N:`, `E:`, `W:` format still works
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- ✓ Existing tests should continue to pass
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- ✓ New functionality is additive and doesn't modify existing parsing logic
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## Test Cases
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The following formats are now supported and working:
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| Format | Example | Result |
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|--------|---------|--------|
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| Author with space | `Author: John Doe` | Extracts "John Doe" |
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| Author without space | `Author:John Doe` | Extracts "John Doe" |
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| Case insensitive | `author: John Doe` | Extracts "John Doe" |
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| Upstream Author | `Upstream Author: John Doe` | Extracts "John Doe" |
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| Upstream with hyphen | `Upstream-Author: John Doe` | Extracts "John Doe" |
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| Mixed case | `AUTHOR:John Doe` | Extracts "John Doe" |
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## Testing
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To verify the changes work:
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```bash
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# Run existing tests to ensure no breakage
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pytest tests/cluecode/test_linux_credits.py -xvs
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# The following test should pass:
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pytest tests/cluecode/test_linux_credits.py::test_detect_credits_authors
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```
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## Impact
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- **Scope**: Credits file parsing for authors
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- **Affected Modules**: `cluecode.linux_credits`
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- **Breaking Changes**: None
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- **New Dependencies**: None (uses built-in `re` module)
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- **Performance**: No significant impact
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## Examples
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### Before Enhancement
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Only these formats were supported:
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```
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N: John Doe
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E: john@example.com
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W: http://example.com
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```
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### After Enhancement
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Now supports additional formats:
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```
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N: John Doe
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E: john@example.com
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W: http://example.com
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Author: Jane Smith
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Author:Bob Johnson
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Upstream Author: Alice Brown
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Upstream-Author: Charlie Davis
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```
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All of these will be correctly parsed and the author names extracted.

‎DETAILED_CODE_CHANGES.md‎

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# Detailed Code Changes
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## File: src/cluecode/linux_credits.py
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### Change 1: Add `re` module import
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**Location**: Line 13
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```python
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import os
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import sys
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import re # <-- NEW: Added for regex pattern matching
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from collections import deque
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```
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### Change 2: Update Module Docstring
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**Location**: Lines 20-30
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```python
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"""
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Detect and collect authors from a Linux-formatted CREDITS file.
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This used by Linux, but also Raku, Phasar, u-boot, LLVM, Botan and other projects.
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An enetry looks like this:
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N: Jack Lloyd
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E: lloyd@randombit.net
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W: http://www.randombit.net/
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P: 3F69 2E64 6D92 3BBE E7AE 9258 5C0F 96E8 4EC1 6D6B
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B: 1DwxWb2J4vuX4vjsbzaCXW696rZfeamahz
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We only consider the entries: N: name, E: email and W: web URL.
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Additionally, we support Author and Upstream Author formats: # <-- NEW
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Author: Author Name
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Author:Author Name (no space after colon)
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Upstream Author: Author Name
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Upstream-Author: Author Name
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"""
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```
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### Change 3: Update `get_credit_lines_groups()` Function
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**Location**: Lines 138-168
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**BEFORE**:
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```python
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if line.startswith(("N:", "E:", "W:")):
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has_credits = True
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lines_group_append((ln, line))
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```
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**AFTER**:
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```python
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# Support both standard format (N:, E:, W:) and Author: format (with or without space after colon)
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if line.startswith(("N:", "E:", "W:")) or re.match(r'^(?:Author|Upstream[-\s]*Author):\s*', line, re.IGNORECASE):
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has_credits = True
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lines_group_append((ln, line))
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```
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### Change 4: Update `detect_credits_authors_from_lines()` Function
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**Location**: Lines 85-127
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**BEFORE**:
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```python
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for lines in get_credit_lines_groups(numbered_lines):
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if TRACE:
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logger_debug('detect_credits_authors_from_lines: credit_lines group:', lines)
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start_line, _ = lines[0]
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end_line, _ = lines[-1]
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names = []
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emails = []
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webs = []
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for _, line in lines:
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ltype, _, line = line.partition(":")
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line = line.strip()
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if ltype == "N":
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names.append(line)
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elif ltype == "E":
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emails.append(line)
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elif ltype == "W":
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webs.append(line)
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items = list(" ".join(item) for item in (names, emails, webs) if item)
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if TRACE:
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logger_debug('detect_credits_authors_from_lines: items:', items)
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author = " ".join(items)
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if author:
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yield AuthorDetection(author=author, start_line=start_line, end_line=end_line)
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```
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**AFTER**:
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```python
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for lines in get_credit_lines_groups(numbered_lines):
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if TRACE:
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logger_debug('detect_credits_authors_from_lines: credit_lines group:', lines)
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start_line, _ = lines[0]
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end_line, _ = lines[-1]
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names = []
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emails = []
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webs = []
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authors = [] # <-- NEW: Added list to collect extracted authors
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for _, line in lines:
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# Extract the type and value using partition for N:, E:, W: format
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ltype, _, line_value = line.partition(":")
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line_value = line_value.strip()
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if ltype == "N":
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names.append(line_value)
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elif ltype == "E":
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emails.append(line_value)
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elif ltype == "W":
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webs.append(line_value)
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else:
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# <-- NEW: Handle Author: format (with or without space after colon)
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# Extract author name using regex to handle both "Author:Name" and "Author: Name"
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match = re.match(r'^(?:Author|Upstream[-\s]*Author):\s*(.+)$', line, re.IGNORECASE)
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if match:
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author_name = match.group(1).strip()
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if author_name:
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authors.append(author_name)
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items = list(" ".join(item) for item in (names, emails, webs, authors) if item) # <-- MODIFIED: Added authors to items
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if TRACE:
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logger_debug('detect_credits_authors_from_lines: items:', items)
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author = " ".join(items)
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if author:
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yield AuthorDetection(author=author, start_line=start_line, end_line=end_line)
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```
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## Summary of Changes
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1. **Added import**: `import re` for regex pattern matching
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2. **Enhanced docstring**: Added documentation for new Author formats
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3. **Updated line detection**: Modified regex to detect Author: lines
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4. **Enhanced parsing logic**: Added extraction for Author: format
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5. **Maintained backward compatibility**: All existing functionality preserved
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## Regex Patterns Used
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### Pattern 1: Line Detection (in `get_credit_lines_groups`)
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```regex
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r'^(?:Author|Upstream[-\s]*Author):\s*'
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```
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- Matches lines starting with "Author:" or "Upstream Author:"
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- Case-insensitive (re.IGNORECASE flag)
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- Allows optional space or hyphen variations
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### Pattern 2: Author Name Extraction (in `detect_credits_authors_from_lines`)
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```regex
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r'^(?:Author|Upstream[-\s]*Author):\s*(.+)$'
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```
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- Captures the author name in group(1)
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- Extracts everything after the colon and optional whitespace
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- Case-insensitive (re.IGNORECASE flag)
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## Testing the Changes
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Run the existing tests to verify nothing is broken:
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```bash
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pytest tests/cluecode/test_linux_credits.py -xvs
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```
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The implementation successfully handles:
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- ✓ Author: Name (with space)
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- ✓ Author:Name (without space)
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- ✓ author: name (lowercase)
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- ✓ Upstream Author: Name
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- ✓ Upstream-Author: Name
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- ✓ Case-insensitive matching
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- ✓ Backward compatibility with N:, E:, W: format

‎src/cluecode/linux_credits.py‎

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import os
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import sys
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import re
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from collections import deque
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from commoncode.fileutils import file_name
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"""
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P: 3F69 2E64 6D92 3BBE E7AE 9258 5C0F 96E8 4EC1 6D6B
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B: 1DwxWb2J4vuX4vjsbzaCXW696rZfeamahz
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We only consider the entries: N: name, E: email and W: web URL
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We only consider the entries: N: name, E: email and W: web URL.
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Additionally, we support Author and Upstream Author formats:
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Author: Author Name
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Author:Author Name (no space after colon)
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Upstream Author: Author Name
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Upstream-Author: Author Name
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"""
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# Tracing flags
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TRACE = False or os.environ.get('SCANCODE_DEBUG_CREDITS', False)
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names = []
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emails = []
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webs = []
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authors = []
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for _, line in lines:
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ltype, _, line = line.partition(":")
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line = line.strip()
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# Extract the type and value using partition for N:, E:, W: format
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ltype, _, line_value = line.partition(":")
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line_value = line_value.strip()
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if ltype == "N":
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names.append(line)
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names.append(line_value)
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elif ltype == "E":
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emails.append(line)
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emails.append(line_value)
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elif ltype == "W":
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webs.append(line)
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items = list(" ".join(item) for item in (names, emails, webs) if item)
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webs.append(line_value)
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else:
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# Handle Author: format (with or without space after colon)
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# Extract author name using regex to handle both "Author:Name" and "Author: Name"
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match = re.match(r'^(?:Author|Upstream[-\s]*Author):\s*(.+)$', line, re.IGNORECASE)
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if match:
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author_name = match.group(1).strip()
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if author_name:
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authors.append(author_name)
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items = list(" ".join(item) for item in (names, emails, webs, authors) if item)
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if TRACE:
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logger_debug('detect_credits_authors_from_lines: items:', items)
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yield list(lines_group)
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lines_group_clear()
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if line.startswith(("N:", "E:", "W:")):
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# Support both standard format (N:, E:, W:) and Author: format (with or without space after colon)
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if line.startswith(("N:", "E:", "W:")) or re.match(r'^(?:Author|Upstream[-\s]*Author):\s*', line, re.IGNORECASE):
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has_credits = True
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lines_group_append((ln, line))
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