name: Packages

on:
  push:
    branches:
    - master
    paths:
    - 'packages/**'
    - 'root-packages/**'
    - 'x11-packages/**'
  pull_request:
    paths:
    - 'packages/**'
    - 'root-packages/**'
    - 'x11-packages/**'
  workflow_dispatch:
    inputs:
      packages:
        description: "A space-separated names of packages selected for rebuilding"
        required: true

jobs:
  build:
    runs-on: ubuntu-latest
    env:
      ANDROID_HOME: "/opt/termux/android-sdk"
      NDK: "/opt/termux/android-ndk"
    strategy:
      matrix:
        target_arch: [aarch64, arm, i686, x86_64]
      fail-fast: false
    steps:
    - name: Clone repository
      uses: actions/checkout@v3
      with:
        fetch-depth: 1000
    - name: Gather build summary
      run: |
        if [ "${{ github.event_name }}" != "workflow_dispatch" ]; then
          BASE_COMMIT=$(jq --raw-output .pull_request.base.sha "$GITHUB_EVENT_PATH")
          OLD_COMMIT=$(jq --raw-output .commits[0].id "$GITHUB_EVENT_PATH")
          HEAD_COMMIT=$(jq --raw-output .commits[-1].id "$GITHUB_EVENT_PATH")
          if [ "$BASE_COMMIT" = "null" ]; then
            if [ "$OLD_COMMIT" = "$HEAD_COMMIT" ]; then
              # Single-commit push.
              echo "Processing commit: ${HEAD_COMMIT}"
              CHANGED_FILES=$(git diff-tree --no-commit-id --name-only -r "${HEAD_COMMIT}")
            else
              # Multi-commit push.
              OLD_COMMIT="${OLD_COMMIT}~1"
              echo "Processing commit range: ${OLD_COMMIT}..${HEAD_COMMIT}"
              CHANGED_FILES=$(git diff-tree --no-commit-id --name-only -r "${OLD_COMMIT}" "${HEAD_COMMIT}")
            fi
          else
            # Pull requests.
            echo "Processing pull request #$(jq --raw-output .pull_request.number "$GITHUB_EVENT_PATH"): ${BASE_COMMIT}..HEAD"
            CHANGED_FILES=$(git diff-tree --no-commit-id --name-only -r "${BASE_COMMIT}" "HEAD")
          fi
        fi
        mkdir -p ./artifacts ./debs
        touch ./debs/.placeholder

        # Process tag '%ci:no-build' that may be added as line to commit message.
        # Forces CI to cancel current build with status 'passed'
        if grep -qiP '^\s*%ci:no-build\s*$' <(git log --format="%B" -n 1 "HEAD"); then
          tar cf artifacts/debs-${{ matrix.target_arch }}.tar debs
          echo "[!] Force exiting as tag '%ci:no-build' was applied to HEAD commit message."
          exit 0
        fi

        if [ "${{ github.event_name }}" != "workflow_dispatch" ]; then
          # Build local Docker image if setup scripts were changed.
          # Useful for pull requests submitting changes for both build environment and packages.
          if grep -qP '^scripts/(Dockerfile|setup-android-sdk\.sh|setup-ubuntu\.sh)$' <<< "$CHANGED_FILES"; then
            echo "Detected changes for environment setup scripts. Building custom Docker image now."
            cd ./scripts
            docker build -t termux/package-builder:latest .
            cd ..
          fi

          for repo_path in $(jq --raw-output 'keys | .[]' < repo.json); do
            local repo=$(jq --raw-output '.["'$repo_path'"]' < repo.json)
            # Parse changed files and identify new packages and deleted packages.
            # Create lists of those packages that will be passed to upload job for
            # further processing.
            while read -r file; do
              if ! [[ $file == $repo_path/* ]]; then
                # This file does not belong to a package, so ignore it
                continue
              fi
              if [[ $file =~ ^$repo_path/([.a-z0-9+-]*)/([.a-z0-9+-]*).subpackage.sh$ ]]; then
                # A subpackage was modified, check if it was deleted or just updated
                pkg=${BASH_REMATCH[1]}
                subpkg=${BASH_REMATCH[2]}
                if [ ! -f "${repo_path}/${pkg}/${subpkg}.subpackage.sh" ]; then
                  echo "$subpkg" >> ./deleted_$repo_packages.txt
                fi
              elif [[ $file =~ ^$repo_path/([.a-z0-9+-]*)/.*$ ]]; then
                # package, check if it was deleted or updated
                pkg=${BASH_REMATCH[1]}
                if [ ! -d "${repo_path}/${pkg}" ]; then
                  echo "$pkg" >> ./deleted_$repo_packages.txt
                else
                  echo "$pkg" >> ./built_$repo_packages.txt
                  # If there are subpackages we want to create a list of those
                  # as well
                  for file in $(find "${repo_path}/${pkg}/" -maxdepth 1 -type f -name \*.subpackage.sh | sort); do
                    echo "$(basename "${file%%.subpackage.sh}")" >> ./built_$repo_subpackages.txt
                  done
                fi
              fi
            done<<<${CHANGED_FILES}
          done
        else
          for pkg in ${{ github.event.inputs.packages }}; do
            for repo_path in $(jq --raw-output 'keys | .[]' < repo.json); do
              local repo=$(jq --raw-output '.["'$repo_path'"]' < repo.json)
              if [ -d "${repo}/${pkg}" ]; then
                echo "$pkg" >> ./built_$repo_packages.txt
                for subpkg in $(find "${repo}/${pkg}/" -maxdepth 1 -type f -name \*.subpackage.sh | sort); do
                  echo "$(basename "${subpkg%%.subpackage.sh}")" >> ./built_$repo_subpackages.txt
                done
              else
                echo "Package '${pkg}' not found in any of the repo"
              fi
            done
          done
        fi

        for repo in $(jq --raw-output '.[]' < repo.json); do
          # Fix so that lists do not contain duplicates
          if [ -f ./built_$repo_packages.txt ]; then
            uniq ./built_$repo_packages.txt > ./built_$repo_packages.txt.tmp
            mv ./built_$repo_packages.txt.tmp ./built_$repo_packages.txt
          fi
          if [ -f ./built_$repo_subpackages.txt ]; then
            uniq ./built_$repo_subpackages.txt > ./built_$repo_subpackages.txt.tmp
            mv ./built_$repo_subpackages.txt.tmp ./built_$repo_subpackages.txt
          fi
          if [ -f ./deleted_$repo_packages.txt ]; then
            uniq ./deleted_$repo_packages.txt > ./deleted_$repo_packages.txt.tmp
            mv ./deleted_$repo_packages.txt.tmp ./deleted_$repo_packages.txt
          fi
        done

    - name: Free additional disk space (if necessary)
      run: |
        if grep -qP '^rust$' ./built_packages.txt ; then
          echo "Free additional disk space on host"
          sudo apt purge -yq $(dpkg -l | grep '^ii' | awk '{ print $2 }' | grep -P '(cabal-|dotnet-|ghc-|libmono|php)') \
            liblldb-6.0 libllvm6.0:amd64 mono-runtime-common monodoc-manual powershell ruby
          sudo apt autoremove -yq
          sudo rm -rf /opt/hostedtoolcache /usr/local /usr/share/dotnet /usr/share/swift
        fi

    - name: Lint packages
      run: |
        local package_recipes=
        for repo_path in $(jq --raw-output 'keys | .[]' < repo.json); do
          local repo=$(jq --raw-output '.["'$repo_path'"]' < repo.json)
          if [ -f ./built_$repo_packages.txt ]; then
            package_recipes+=$(cat ./built_$repo_packages.txt | repo_path=$repo_path awk '{print ENVIRON["repo_path"]"/"$1"/build.sh"}')
          fi
        done

        ./scripts/lint-packages.sh $package_recipes

    - name: Build packages
      run: |
        local packages=
        for repo_path in $(jq --raw-output 'keys | .[]' < repo.json); do
          local repo=$(jq --raw-output '.["'$repo_path'"]' < repo.json)

          if [ -f ./built_$repo_packages.txt ]; then
            packages+=$(cat ./build_$repo_packages.txt)
          fi
        done

        ./scripts/run-docker.sh ./build-package.sh -I -a ${{ matrix.target_arch }} $packages

    - name: Generate build artifacts
      if: always()
      run: |
        test -d termux-packages/output && mv termux-packages/output/* ./output/

        for repo in $(jq --raw-output '.[]' < repo.json); do
          mkdir debs
          # Put package lists into directory with *.deb files so they will be transferred to
          # upload job.
          test -f ./built_$repo_packages.txt && mv ./built_repo_packages.txt ./debs/built_packages.txt
          test -f ./built_$repo_subpackages.txt && cat ./built_repo_subpackages.txt >> ./debs/built_packages.txt \
            && rm ./built_$repo_subpackages.txt
          test -f ./deleted_$repo_packages.txt && mv ./deleted_$repo_packages.txt ./debs/deleted_packages.txt

          # Move only debs from built_packages into debs/ folder before
          # creating an archive.
          while read -r pkg; do
            # Match both $pkg.deb and $pkg-static.deb.
            find output \( -name "$pkg_*.deb" -o -name "$pkg-static_*.deb" \) -type f -print0 | xargs -0r mv -t debs/
          done < <(cat ./debs/built_packages.txt)

          # Files containing certain symbols (e.g. ":") will cause failure in actions/upload-artifact.
          # Archiving *.deb files in a tarball to avoid issues with uploading.
          tar cf artifacts/debs-${repo}-${{ matrix.target_arch }}-${{ github.sha }}.tar debs
          rm -r debs/
        done
    - name: Checksums for built *.deb files
      if: always()
      run: |
        find debs -type f -name "*.deb" -exec sha256sum "{}" \; | sort -k2
    - name: Store *.deb files
      if: always()
      uses: actions/upload-artifact@v3
      with:
        name: debs-${{ matrix.target_arch }}-${{ github.sha }}
        path: ./artifacts

  upload:
    if: github.event_name != 'pull_request'
    needs: build
    runs-on: ubuntu-latest
    steps:
    - name: Clone repository
      uses: actions/checkout@v3
    - name: Get *.deb files
      uses: actions/download-artifact@v3
      with:
        path: ./
    - name: Upload to packages.termux.org
      env:
        REPOSITORY_DISTRIBUTION: stable
        REPOSITORY_URL: https://packages.termux.org/aptly-api
      run: |
        GITHUB_SHA=${{ github.sha }}
        APTLY_API_AUTH=${{ secrets.APTLY_API_AUTH }}
        GPG_PASSPHRASE=${{ secrets.GPG_PASSPHRASE }}

        source scripts/aptly_api.sh

        for repo in $(jq --raw-output '.[]' < repo.json); do
          export REPOSITORY_NAME=$repo

          for archive in debs-*/debs-$repo-{aarch64,arm,i686,x86_64}-${{ github.sha }}.tar; do
            tar xf "$archive"
          done

          # Upload file to temporary directory.
          uploaded_files=false
          shopt -s nullglob
          for filename in $(cat debs/built_packages.txt | sed -E 's/(..*)/debs\/\1_\*.deb debs\/\1-static_\*.deb/g'); do
            if ! aptly_upload_file "$filename"; then
              exit 1
            fi

            uploaded_files=true
          done
          shopt -u nullglob
  
          # Publishing repository changes.
          if [ "$uploaded_files" = "true" ]; then
            if ! aptly_add_to_repo; then
              exit 1
            fi

            # Usually temporary directory is deleted automatically, but in certain cases it is left.
            aptly_delete_dir

            # Final part to make changes appear in web root.
            if ! aptly_publish_repo; then
              exit 1
            fi
          fi

          # Delete the debs folder in order to not upload packages from one repo to other
          # TODO(@thunder-coding): Perhaps it would make sense to make use of tar's `-C` option in order to prevent extracting the archives twice
          rm -rf debs/
        done
    - name: Upload to grimler.se
      # Run even if upload to packages.termux.org failed:
      if: always()
      env:
        REPOSITORY_DISTRIBUTION: stable
        REPOSITORY_URL: https://aptly-api.grimler.se
      run: |
        GITHUB_SHA=${{ github.sha }}
        APTLY_API_AUTH=${{ secrets.APTLY_API_AUTH }}

        source scripts/aptly_api.sh


        for repo in $(jq --raw-output '.[]' < repo.json); do
          export REPOSITORY_NAME=$repo

          for archive in debs-*/debs-$repo-{aarch64,arm,i686,x86_64}-${{ github.sha }}.tar; do
            tar xf "$archive"
          done

          # Upload file to temporary directory.
          uploaded_files=false
          shopt -s nullglob
          for filename in $(cat debs/built_packages.txt | sed -E 's/(..*)/debs\/\1_\*.deb debs\/\1-static_\*.deb/g'); do
            if ! aptly_upload_file "$filename"; then
              exit 1
            fi

            uploaded_files=true
          done
          shopt -u nullglob

          # Publishing repository changes.
          if [ "$uploaded_files" = "true" ]; then
            if ! aptly_add_to_repo; then
              exit 1
            fi

            # Usually temporary directory is deleted automatically, but in certain cases it is left.
            aptly_delete_dir

            # grimler.se mirror is signed manually, can't publish
            # through CI
            # if ! aptly_publish_repo; then
            #   exit 1
            # fi
          fi
          # Delete the debs folder in order to not upload packages from one repo to other
          rm -rf debs/
        done