ci.yml

name: CI - Build and Verify

on:
  push:
    paths:
      - 'src/**'
      - 'include/**'
      - '.github/workflows/**'
      - 'CMakeLists.txt'
      - 'read.txt'
      - 'expected.txt'
  workflow_dispatch:

jobs:
  ubuntu-ci:
    name: Linux (Ubuntu / GCC)
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Fast Install Dependencies (no man-db)
        run: |
          sudo apt-get update -qq
          sudo apt-get remove -y man-db || true
          echo "man-db hold" | sudo dpkg --set-selections
          sudo apt-get install -y --no-install-recommends eatmydata
          sudo eatmydata apt-get install -y --no-install-recommends ninja-build g++ cmake flex bison nasm

      - name: Configure and Build
        run: |
          mkdir -p build
          cd build
          cmake -G Ninja ..
          ninja

      - name: Run Compiler (generate asm)
        run: |
          printf "q;\n" | ./build/compiler -src "read.txt" -target "out.asm" --ast --ir
          echo "Compiler executed, out.asm generated"

      - name: Assemble, Link and Run Generated Program
        run: |
          nasm -f elf64 out.asm -o output.o
          ld output.o -o output
          ./output > ./output.txt

      - name: Compare Output with expected.txt
        run: |
          # Normalize both expected and output by stripping trailing blanks and blank lines
          sed -E 's/[[:space:]]+$//' expected.txt | sed -E '/^[[:space:]]*$/d' > expected_trimmed.txt
          sed -E 's/[[:space:]]+$//' output.txt   | sed -E '/^[[:space:]]*$/d' > output_trimmed.txt
          
          echo "=== Program Output ==="
          cat output_trimmed.txt
          echo "======================="
          echo "=== Expected Output ==="
          cat expected_trimmed.txt
          echo "======================="
          diff -u expected_trimmed.txt output_trimmed.txt || (echo "❌ Output mismatch" && exit 1)
          echo "✅ Output matches expected.txt"