post-merge

#!/usr/bin/env bash

# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
# MDSIG Frontend — Post-Merge Hook
# Syncs deps, cleans stale caches, and notifies about env changes.
# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

# Colors
_CLI_GREEN='\033[0;32m'
_CLI_YELLOW='\033[0;33m'
_CLI_CYAN='\033[0;36m'
_CLI_PURPLE='\033[0;35m'
_CLI_RED='\033[0;31m'
_CLI_BLUE='\033[0;34m'
_CLI_GRAY='\033[0;90m'
_CLI_NC='\033[0m'

# Symbols
_CLI_CHECK="${_CLI_GREEN}[✓]${_CLI_NC}"
_CLI_CROSS="${_CLI_RED}[✗]${_CLI_NC}"
_CLI_WARN="${_CLI_YELLOW}[!]${_CLI_NC}"
_CLI_INFO="${_CLI_CYAN}[i]${_CLI_NC}"

# Helpers
log_info()    { echo -e "$_CLI_INFO $1"; }
log_success() { echo -e "$_CLI_CHECK $1"; }
log_warn()    { echo -e "$_CLI_WARN $1"; }
log_error()   { echo -e "$_CLI_CROSS $1"; }

print_divider() {
  local color="${1:-$_CLI_PURPLE}" label="${2:-}"
  local width="${COLUMNS:-$(tput cols 2>/dev/null || echo 80)}"
  if [[ -n "$label" ]]; then
    local padding=$((width - ${#label} - 6))
    local fill
    printf -v fill '%*s' "$padding" ''
    printf '%b━━━━[%s]%s%b\n' "$color" "$label" "${fill// /━}" "$_CLI_NC"
  else
    local fill
    printf -v fill '%*s' "$width" ''
    printf '%b%s%b\n' "$color" "${fill// /━}" "$_CLI_NC"
  fi
}

# Get list of files changed in this merge
changed_files() {
  git diff-tree -r --name-only --no-commit-id ORIG_HEAD HEAD 2>/dev/null
}

# ── Main ──────────────────────────────────────────────────────────

echo ""
print_divider "$_CLI_PURPLE" "Post-Merge"
echo ""

CHANGED=$(changed_files)

# 1. Run pnpm install only if lockfile changed
if echo "$CHANGED" | grep -qE "(pnpm-lock\.yaml|package\.json)"; then
  log_info "Dependencies changed — running ${_CLI_CYAN}pnpm install${_CLI_NC}..."
  if pnpm install; then
    echo ""
    log_success "Dependencies updated"
  else
    echo ""
    log_error "pnpm install failed — run it manually"
  fi
else
  log_success "Dependencies unchanged — skipping install"
fi

echo ""

# 2. Clean .next cache when next.config.js changed
if echo "$CHANGED" | grep -qE "next\.config\.(js|mjs|ts)"; then
  log_warn "next.config changed — cleaning ${_CLI_BLUE}.next${_CLI_NC} cache..."
  if [[ -d ".next" ]]; then
    rm -rf .next
    log_success "Cleared ${_CLI_BLUE}.next${_CLI_NC} cache"
    log_info "Run ${_CLI_CYAN}pnpm dev${_CLI_NC} or ${_CLI_CYAN}pnpm build${_CLI_NC} to rebuild"
  else
    log_info "No .next cache to clean"
  fi
  echo ""
fi

# 3. Notify when .env.local.example changed
if echo "$CHANGED" | grep -q ".env.local.example"; then
  echo ""
  print_divider "$_CLI_YELLOW" "Environment Update Required"
  echo ""
  log_warn "The ${_CLI_BLUE}.env.local.example${_CLI_NC} file was updated!"
  echo ""
  log_info "Review the changes and update your local ${_CLI_BLUE}.env.local${_CLI_NC}:"
  echo ""
  echo -e "    ${_CLI_CYAN}git diff ORIG_HEAD HEAD -- .env.local.example${_CLI_NC}"
  echo ""
  # Show the actual diff inline for convenience
  diff_output=$(git diff ORIG_HEAD HEAD -- .env.local.example 2>/dev/null)
  if [[ -n "$diff_output" ]]; then
    log_info "Changes:"
    echo ""
    echo "$diff_output" | while IFS= read -r line; do
      if [[ "$line" == +* && "$line" != "+++"* ]]; then
        echo -e "    ${_CLI_GREEN}${line}${_CLI_NC}"
      elif [[ "$line" == -* && "$line" != "---"* ]]; then
        echo -e "    ${_CLI_RED}${line}${_CLI_NC}"
      fi
    done
    echo ""
  fi
  print_divider "$_CLI_YELLOW"
  echo ""
fi

echo ""
print_divider "$_CLI_PURPLE"
echo ""