60 lines
2.1 KiB
Text
60 lines
2.1 KiB
Text
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#!/bin/sh
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# hooks/commit-msg -- keep commit trailers in this project's attribution form.
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#
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# card-games is published (MELPA, and bound for GNU ELPA), so every commit
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# message is a permanent public record. This hook refuses two trailers the
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# project has not agreed to and checks the one form it has:
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#
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# refused a session-link trailer (Claude-Session and the like)
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# refused Co-Authored-By naming Claude or anthropic.com
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# checked Assisted-by: NAME (for PERSON; MODEL)
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# e.g. Assisted-by: Mentat (for Corwin; claude-opus-5-5)
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# A comma in place of the semicolon is accepted too.
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#
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# Attribution is the author's call: a message with no Assisted-by line
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# passes. Comment lines, and everything after the scissors line that
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# `git commit -v' adds, are not checked.
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#
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# Install: make hooks (also installs applypatch-msg, so `git am' is checked)
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# Bypass: git commit --no-verify -- a hook is a check, not a lock.
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# Tests: make test-hooks
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#
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# Usage: commit-msg MESSAGE-FILE Exit 0 accepts, 1 refuses.
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set -u
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msg=${1:?usage: commit-msg MESSAGE-FILE}
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cr=$(printf '\r')
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status=0
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refuse () {
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printf 'commit-msg: %s\n %s\n' "$1" "$2" >&2
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status=1
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}
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while IFS= read -r line || [ -n "$line" ]; do
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line=${line%"$cr"}
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case $line in
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'# ------------------------ >8 ------------------------'*) break ;;
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'#'*) continue ;;
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esac
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lower=$(printf '%s' "$line" | tr '[:upper:]' '[:lower:]')
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case $lower in
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claude-session:*)
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refuse 'session links are not used in this project:' "$line" ;;
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co-authored-by:*claude*|co-authored-by:*anthropic.com*)
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refuse 'credit AI help as Assisted-by: NAME (for PERSON; MODEL), not:' "$line" ;;
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assisted-by:*)
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if ! printf '%s\n' "$line" |
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grep -Eq '^[Aa]ssisted-[Bb]y: [^ (][^(]* \(for [^;,()]+[;,] [^ ;,()]+\)$'
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then
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refuse 'expected Assisted-by: NAME (for PERSON; MODEL), got:' "$line"
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fi ;;
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esac
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done < "$msg"
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if [ "$status" -ne 0 ]; then
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echo 'commit-msg: refused; fix the message and try again.' >&2
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fi
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exit "$status"
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