#!/bin/bash
# Generate full dependency list for packages on Arch Linux
# Input: packages.txt (one package per line, lines starting with # are ignored)
# Output: packages.all.txt (all deps + base packages, unique and sorted)

INPUT_FILE="packages.txt"
OUTPUT_FILE="packages.all.txt"

if [[ ! -f "$INPUT_FILE" ]]; then
  echo "❌ Error: $INPUT_FILE not found."
  exit 1
fi

echo "📦 Generating full dependency list from $INPUT_FILE..."

TMP_FILE=$(mktemp)

# Read each package, skipping comments and blank lines
while read -r pkg; do
  # Skip empty or commented lines
  [[ -z "$pkg" || "$pkg" =~ ^# ]] && continue

  echo "→ Resolving dependencies for: $pkg"
  pactree -u "$pkg" >> "$TMP_FILE" 2>/dev/null
done < "$INPUT_FILE"

# Merge, remove duplicates, and sort
cat "$INPUT_FILE" "$TMP_FILE" | grep -v '^#' | sort -u > "$OUTPUT_FILE"

rm -f "$TMP_FILE"

echo "✅ Done! Saved complete list to: $OUTPUT_FILE"