joy-core 0.15.1

#!/usr/bin/env bash
# Joy commit-msg hook -- validates that commit messages reference a Joy item.
# Installed via: git config core.hooksPath .joy/hooks
# See ADR-015 for error output format.

set -euo pipefail

MSG_FILE="$1"
MSG=$(cat "$MSG_FILE")

# Allow merge commits
if [ -f "$(git rev-parse --git-dir)/MERGE_HEAD" ] 2>/dev/null; then
    exit 0
fi

# Allow [no-item] bypass
if echo "$MSG" | grep -qF '[no-item]'; then
    exit 0
fi

# Read project acronym from .joy/project.yaml
PROJECT_FILE=""
ROOT=$(git rev-parse --show-toplevel 2>/dev/null || pwd)
if [ -f "$ROOT/.joy/project.yaml" ]; then
    PROJECT_FILE="$ROOT/.joy/project.yaml"
fi

if [ -z "$PROJECT_FILE" ]; then
    # No Joy project found, skip validation
    exit 0
fi

ACRONYM=$(grep -E '^acronym:' "$PROJECT_FILE" | head -1 | sed 's/^acronym:[[:space:]]*//' | tr -d '"' | tr -d "'")

if [ -z "$ACRONYM" ]; then
    exit 0
fi

# Check for item ID pattern: ACRONYM-XXXX or ACRONYM-XXXX-YY (ADR-027)
PATTERN="${ACRONYM}-[0-9A-Fa-f]{4}(-[0-9A-Fa-f]{2})?"

if echo "$MSG" | grep -qE "$PATTERN"; then
    exit 0
fi

# Error output (ADR-015 diagnostic format)
echo "" >&2
echo "error: commit message must reference a Joy item" >&2
echo "  |" >&2
echo "  | $(echo "$MSG" | head -1)" >&2
echo "  | ^ no ${ACRONYM}-XXXX item ID found" >&2
echo "  |" >&2
echo "  = help: add an item ID to your commit message (e.g. ${ACRONYM}-0001)" >&2
echo "  = note: use [no-item] tag for infrastructure commits without a Joy item" >&2
echo "" >&2
exit 1