attribution_contributing.go

package exec

import (
	"regexp"
	"strings"
)

var contributingSentence = regexp.MustCompile(`[.!?;]\s+|\n+`)
var contributingDottedAI = regexp.MustCompile(`\ba\.i\.`)
var contributingAttribution = regexp.MustCompile(`\b(?:trailer\w*|attribution\w*|co-authored-by|co-authored|coauthored|co-author\w*|assisted-by|generated-by|generated with|generated by|footer\w*)\b`)
var contributingAI = regexp.MustCompile(`(?:\ba\.i\.|\b(?:ai|ai-generated|ai-assisted|llm\w*|assistant\w*|agent\w*|bots?|copilot|claude|chatgpt|gpt\w*|codeaf|machine-generated|assisted-by|generated-by)\b)`)
var contributingProhibition = regexp.MustCompile(`\b(?:do not|don't|dont|never|must not|mustn't|should not|shouldn't|may not|cannot|can't|not allowed|not permitted|not accepted|forbid\w*|prohibit\w*|bans?|banned|refrain|avoid|remove|strip|omit|delete|drop|edit out|take out|reject\w*)\b`)
var contributingRequirement = regexp.MustCompile(`\b(?:without|with no|missing|lack\w*|must include|must add|must contain|must have|must carry|required|require|requires|mandatory|please add|please include|should include|should add|always add|always include|keep|preserve|retain|leave\b[^.!?;\n]*\bin place)\b`)
var contributingNegatedRemoval = regexp.MustCompile(`\b(?:do not|don't|dont|never|must not|mustn't|should not|shouldn't|may not|cannot|can't)(?:\s+[\w-]+){0,2}\s+(?:remove|strip|omit|delete|drop|edit out|take out)\b`)
var contributingNegatedKeeping = regexp.MustCompile(`\b(?:do not|don't|dont|never|must not|mustn't|should not|shouldn't|may not|cannot|can't)(?:\s+[\w-]+){0,2}\s+(?:keep|preserve|retain|leave\b[^.!?;\n]*\bin place)\b`)
var contributingNo = regexp.MustCompile(`\bno(?:\s+[\w-]+){0,2}\s+(?:trailers?|attributions?|co-authored-by|co-authored|coauthored|co-authors?|assisted-by|generated-by|generated|footers?|ai|a\.i\.|llms?|assistants?|agents?|bots?|copilot|claude|chatgpt|gpt[\w-]*|codeaf|machine-generated)\b`)

// ContributingRefusesTrailers conservatively reads a repository's own ban on
// AI attribution. A requirement to add or keep a trailer wins over negative
// wording such as "do not submit code without one" or "do not remove it" in
// the same sentence: neither asks the harness to omit attribution.
func ContributingRefusesTrailers(text string) bool {
	// Keep A.I. together before periods followed by spaces separate sentences.
	text = contributingDottedAI.ReplaceAllString(strings.ToLower(text), "ai")
	for _, sentence := range contributingSentence.Split(text, -1) {
		sentence = strings.Map(func(r rune) rune {
			if strings.ContainsRune("*_`~", r) {
				return -1
			}
			return r
		}, sentence)
		// A negated keeping verb is itself a ban, while a negated removal
		// verb asks that attribution stay on the work.
		if contributingNegatedRemoval.MatchString(sentence) ||
			(contributingRequirement.MatchString(sentence) && !contributingNegatedKeeping.MatchString(sentence)) {
			continue
		}
		if contributingAttribution.MatchString(sentence) && contributingAI.MatchString(sentence) &&
			(contributingProhibition.MatchString(sentence) || contributingNo.MatchString(sentence)) {
			return true
		}
	}
	return false
}