add: script commit_msg.sh git/jj et skill commit-message
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173
hooks/commit_msg.sh
Executable file
173
hooks/commit_msg.sh
Executable file
@@ -0,0 +1,173 @@
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#!/usr/bin/env bash
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# commit_msg.sh — génère un message de commit depuis les changements en cours
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# Fonctionne avec git (fichiers stagés) et jj (working copy).
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#
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# Usage : bash .claude/hooks/commit_msg.sh
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set -euo pipefail
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log() { printf '\033[1;34m==>\033[0m %s\n' "$*" >&2; }
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info() { printf ' \033[0;37m%s\033[0m\n' "$*" >&2; }
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ok() { printf ' \033[0;32m✓\033[0m %s\n' "$*" >&2; }
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# --- Détection du VCS ---
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_detect_vcs() {
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if jj root &>/dev/null; then
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echo "jj"
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elif git rev-parse --git-dir &>/dev/null; then
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echo "git"
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else
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echo "none"
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fi
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}
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# --- Fichiers modifiés ---
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_changed_files() {
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case "$VCS" in
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jj) jj diff --name-only ;;
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git) git diff --staged --name-only ;;
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esac
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}
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# --- Diff lisible par fichier ---
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_readable_diff() {
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local file="$1"
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local raw_diff
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case "$VCS" in
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jj) raw_diff=$(jj diff -- "$file") ;;
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git) raw_diff=$(git diff --staged -- "$file") ;;
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esac
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[[ -z "$raw_diff" ]] && return 0
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local max_len
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max_len=$(grep '^[+-]' <<< "$raw_diff" 2>/dev/null \
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| awk '{ if (length > m) m = length } END { print m+0 }')
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if (( max_len <= 500 )); then
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printf '%s' "$raw_diff"
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return
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fi
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# Pretty-print pour les formats pathologiques (JSON, JS minifié…)
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local ext="${file##*.}"
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local pretty_old pretty_new
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case "$ext" in
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json)
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case "$VCS" in
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jj)
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pretty_old=$(jj file show "${file}@-" 2>/dev/null | python3 -m json.tool 2>/dev/null || true)
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pretty_new=$(jj file show "$file" 2>/dev/null | python3 -m json.tool 2>/dev/null || true)
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;;
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git)
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pretty_old=$(git show "HEAD:${file}" 2>/dev/null | python3 -m json.tool 2>/dev/null || true)
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pretty_new=$(git show ":${file}" 2>/dev/null | python3 -m json.tool 2>/dev/null || true)
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;;
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esac
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;;
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js|mjs|cjs|css|ts)
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local node_fmt='
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const chunks = [];
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process.stdin.on("data", d => chunks.push(d));
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process.stdin.on("end", () => {
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const src = chunks.join("");
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const out = src
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.replace(/([{(])/g, "$1\n ")
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.replace(/([;}])/g, "\n$1\n")
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.replace(/,\s*/g, ",\n ");
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process.stdout.write(out);
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});'
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case "$VCS" in
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jj)
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pretty_old=$(jj file show "${file}@-" 2>/dev/null | node -e "$node_fmt" 2>/dev/null || true)
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pretty_new=$(jj file show "$file" 2>/dev/null | node -e "$node_fmt" 2>/dev/null || true)
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;;
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git)
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pretty_old=$(git show "HEAD:${file}" 2>/dev/null | node -e "$node_fmt" 2>/dev/null || true)
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pretty_new=$(git show ":${file}" 2>/dev/null | node -e "$node_fmt" 2>/dev/null || true)
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;;
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esac
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;;
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*)
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case "$VCS" in
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jj)
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pretty_old=$(jj file show "${file}@-" 2>/dev/null | fold -s -w 120 || true)
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pretty_new=$(jj file show "$file" 2>/dev/null | fold -s -w 120 || true)
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;;
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git)
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pretty_old=$(git show "HEAD:${file}" 2>/dev/null | fold -s -w 120 || true)
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pretty_new=$(git show ":${file}" 2>/dev/null | fold -s -w 120 || true)
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;;
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esac
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;;
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esac
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if [[ -n "$pretty_old" && -n "$pretty_new" ]]; then
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diff <(printf '%s\n' "$pretty_old") <(printf '%s\n' "$pretty_new") \
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--label "a/${file}" --label "b/${file}" -u || true
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else
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printf '%s' "$raw_diff"
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fi
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}
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# --- Main ---
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VCS=$(_detect_vcs)
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if [[ "$VCS" == "none" ]]; then
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echo "ERREUR : ni git ni jj détecté dans ce répertoire." >&2
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exit 1
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fi
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log "VCS détecté : $VCS"
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changed_files=$(_changed_files)
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if [[ -z "$changed_files" ]]; then
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echo "Aucun fichier modifié." >&2
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exit 1
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fi
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file_count=$(wc -l <<< "$changed_files" | tr -d ' ')
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log "Fichiers modifiés : $file_count"
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summaries=""
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n=0
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while IFS= read -r file; do
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diff=$(_readable_diff "$file")
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[[ -z "$diff" ]] && continue
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n=$((n + 1))
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log "[$n/$file_count] Résumé de $file …"
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summary=$(printf '%s' "$diff" \
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| aichat "In 2-3 lines, summarise what this diff changes in the file '$file'. Be concise and technical.")
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while IFS= read -r line; do info "$line"; done <<< "$summary"
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summaries+="### $file
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$summary
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"
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done <<< "$changed_files"
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if [[ -z "$summaries" ]]; then
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echo "Aucun diff non-vide trouvé." >&2
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exit 1
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fi
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log "Génération du message de commit ($n fichier(s)) …"
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result=$(printf '%s' "$summaries" \
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| aichat "From these per-file summaries of a diff, write a single conventional git commit message in English. First line: short imperative summary (max 72 chars). Then a blank line. Then a short paragraph with more detail if needed. Output only the commit message, nothing else.")
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ok "Terminé"
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printf '\n' >&2
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printf '%s\n' "$result"
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