Function is_false_positive

src/licensedcode/detection.py:1162–1239

Return True if all of the matches in ``license_matches`` List of LicenseMatch are false positives. False Positive occurs when other text/code is falsely matched to a license rule,

(license_matches, package_license=False)

def is_false_positive(license_matches, package_license=False):
    """
    Return True if all of the matches in ``license_matches`` List of LicenseMatch
    are false positives.

    False Positive occurs when other text/code is falsely matched to a license rule,
    """
    if package_license:
        return False

    # FIXME: actually run copyright detection here?
    copyright_words = ["copyright", "(c)"]
    has_copyrights = all(
        any(
            word in license_match.matched_text().lower()
            for word in copyright_words
        )
        for license_match in license_matches 
    )
    has_full_relevance = all(
        license_match.rule.relevance == 100
        for license_match in license_matches
    )
    if has_copyrights or has_full_relevance:
        return False

    has_low_relevance = all(
        license_match.rule.relevance < 60
        for license_match in license_matches
    )

    start_line_region = min(
        license_match.start_line for license_match in license_matches
    )
    match_rule_length_values = [
        license_match.rule.length for license_match in license_matches
    ]

    all_match_rule_length_one = all(
        match_rule_length == 1
        for match_rule_length in match_rule_length_values
    )
    bare_rules = ['gpl_bare', 'freeware_bare', 'public-domain_bare']
    is_bare_rule = all(
        any([
            bare_rule in license_match.rule.identifier
            for bare_rule in bare_rules
        ])
        for license_match in license_matches
    )

    is_gpl = all(
        'gpl' in license_match.rule.identifier
        for license_match in license_matches
    )

    matches_is_license_tag_flags = all(
        license_match.rule.is_license_tag for license_match in license_matches