Add script to report rules

Signed-off-by: Ayan Sinha Mahapatra <ayansmahapatra@gmail.com>

Author: AyanSinhaMahapatra

etc/scripts/licenses/report_license_rules.py

@@ -0,0 +1,198 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (c) nexB Inc. and others. All rights reserved.
+# ScanCode is a trademark of nexB Inc.
+# SPDX-License-Identifier: Apache-2.0
+# See http://www.apache.org/licenses/LICENSE-2.0 for the license text.
+# See https://github.com/nexB/scancode-toolkit for support or download.
+# See https://aboutcode.org for more information about nexB OSS projects.
+#
+
+import io
+
+import click
+import csv
+
+from commoncode.cliutils import PluggableCommandLineOption
+from licensedcode.models import load_licenses
+from licensedcode.models import load_rules
+
+
+LICENSES_FIELDNAMES = [
+    'key', 'short_name', 'name', 'category', 'owner',  'text', 'words_count', 'notes',
+    'minimum_coverage', 'homepage_url', 'is_exception', 'language', 'is_unknown',
+    'spdx_license_key', 'text_urls', 'other_urls', 'standard_notice',
+    'license_filename', 'faq_url', 'ignorable_authors',
+    'ignorable_copyrights', 'ignorable_holders', 'ignorable_urls', 'ignorable_emails',
+    'osi_license_key', 'osi_url', 'other_spdx_license_keys',
+]
+
+
+RULES_FIELDNAMES = [
+    'identifier', 'license_expression', 'relevance', 'text', 'words_count', 'category',
+    'is_false_positive', 'is_license_text', 'is_license_notice',  'is_license_tag',
+    'is_license_reference', 'is_license_intro', 'has_unknown', 'only_known_words',
+    'notes', 'referenced_filenames', 'minimum_coverage', 'ignorable_copyrights',
+    'ignorable_holders', 'ignorable_authors', 'ignorable_urls', 'ignorable_emails',   
+]
+
+
+def write_data_to_csv(data, output_csv, fieldnames):
+    
+    with open(output_csv,'w',encoding='utf-8-sig',newline='') as f:
+        w = csv.DictWriter(f,fieldnames=fieldnames)
+        w.writeheader()
+
+        for entry in data:
+            w.writerow(entry)
+
+
+def filter_by_attribute(data, attribute, expected):
+    
+    filtered_output = []
+    for entry in data:
+        if entry.get(attribute, 'None') == expected:
+            filtered_output.append(entry)
+            
+    return filtered_output
+
+def flatten_output(data):
+
+    if not isinstance(data, list):
+        return
+
+    output = []
+    for entry in data:
+        if not isinstance(entry, dict):
+            continue
+
+        output_entry = {}
+        for key, value in entry.items():
+            entry_value = None
+            if value is None:
+                continue
+            elif isinstance(value, list):
+                entry_value = ' '.join(value)
+            elif not isinstance(value, str):
+                entry_value = repr(value)
+            elif not entry_value:
+                entry_value = value
+
+            output_entry[key] = entry_value
+
+        output.append(output_entry)
+
+    return output
+
+@click.command()
+@click.option('-l', '--licenses',
+    type=click.Path(dir_okay=False, writable=True, readable=False),
+    default=None,
+    metavar='FILE',
+    help='Write all Licenses data to the csv FILE.',
+    cls=PluggableCommandLineOption
+)
+@click.option('-r', '--rules',
+    type=click.Path(dir_okay=False, writable=True, readable=False),
+    default=None,
+    metavar='FILE',
+    help='Write all Rules data to the csv FILE.',
+    cls=PluggableCommandLineOption,
+)
+@click.option('-c', '--category',
+    type=str,
+    default=None,
+    metavar='STRING',
+    help='An optional filter to only output licenses/rules of this category'
+         '. Example STRING: `permissive`.',
+    cls=PluggableCommandLineOption,
+)
+@click.option('-k', '--license-key',
+    type=str,
+    default=None,
+    metavar='STRING',
+    help='An optional filter to only output licenses/rules which has this license key.'
+         'Example STRING: `mit`.',
+    cls=PluggableCommandLineOption,
+)
+@click.option('-t', '--with-text',
+    is_flag=True,
+    default=False,
+    help='Also include the license/rules texts.'
+         'Note that this increases the file size significantly.', 
+    cls=PluggableCommandLineOption,
+)
+@click.help_option('-h', '--help')
+def cli(licenses, rules, category, license_key, with_text):
+    """
+    Write Licenses/Rules from scancode into a CSV file with all details.
+    Output can be optionally filtered by category/license-key.
+    """
+    licenses_output = []
+    rules_output = []
+
+    licenses_data = load_licenses()
+
+    if licenses:
+        for license in licenses_data.values():
+            license_data = license.to_dict()
+            if with_text:
+                license_data['text'] = license.text
+            license_data['is_unknown'] = license.is_unknown
+            license_data['words_count'] = len(license.text)
+            licenses_output.append(license_data)
+            
+        if category:
+            licenses_output = filter_by_attribute(
+                data=licenses_output,
+                attribute='category',
+                expected=category
+            )
+        
+        if license_key:
+            licenses_output = filter_by_attribute(
+                data=licenses_output,
+                attribute='key',
+                expected=license_key,
+            )
+            
+        licenses_output = flatten_output(data=licenses_output)
+        write_data_to_csv(data=licenses_output, output_csv=licenses, fieldnames=LICENSES_FIELDNAMES)
+
+
+    if rules:
+        rules_data = list(load_rules())
+        for rule in rules_data:
+            rule_data = rule.to_dict()
+            rule_data['identifier'] = rule.identifier
+            rule_data['referenced_filenames'] = rule.referenced_filenames
+            if with_text:
+                rule_data['text'] = rule.text()
+            rule_data['has_unknown'] = rule.has_unknown
+            rule_data['words_count'] = len(rule.text())
+            try:
+                rule_data['category'] = licenses_data[rule_data['license_expression']].category
+            except KeyError:
+                pass
+            rules_output.append(rule_data)
+
+        if category:
+            rules_output = filter_by_attribute(
+                data=rules_output,
+                attribute='category',
+                expected=category
+            )
+
+        if license_key:
+            rules_output = filter_by_attribute(
+                data=rules_output,
+                attribute='license_expression',
+                expected=license_key,
+            )
+        
+        rules_output = flatten_output(rules_output)
+        write_data_to_csv(data=rules_output, output_csv=rules, fieldnames=RULES_FIELDNAMES)
+
+
+if __name__ == '__main__':
+    cli()