name: Packages

on:
  push:
    branches:
    - master
    paths:
    - 'packages/**'
  pull_request:
    paths:
    - '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@v2
      with:
        fetch-depth: 1000
    - name: Build
      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 "${BASE_COMMIT}" "HEAD")
          fi
        fi
        mkdir -p ./artifacts ./debs
        touch ./debs/.placeholder
        if [ "${{ github.event_name }}" != "workflow_dispatch" ]; then
          # 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
          # 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
          # 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 == packages/* ]]; then
              # This file does not belong to a package, so ignore it
              continue
            fi
            if [[ $file =~ ^packages/([.a-z0-9+-]*)/([.a-z0-9+-]*).subpackage.sh$ ]]; then
              # A subpackage was modified, check if it was deleted or just updated
              pkg=${BASH_REMATCH[1]}
              subpkg=${BASH_REMATCH[2]}
              if [ ! -f "packages/${pkg}/${subpkg}.subpackage.sh" ]; then
                echo "$subpkg" >> ./deleted_packages.txt
              fi
            elif [[ $file =~ ^packages/([.a-z0-9+-]*)/.*$ ]]; then
              # package, check if it was deleted or updated
              pkg=${BASH_REMATCH[1]}
              if [ ! -d "packages/${pkg}" ]; then
                echo "$pkg" >> ./deleted_packages.txt
              else
                echo "$pkg" >> ./built_packages.txt
                # If there are subpackages we want to create a list of those
                # as well
                for file in $(find "packages/${pkg}/" -maxdepth 1 -type f -name \*.subpackage.sh | sort); do
                  echo "$(basename "${file%%.subpackage.sh}")" >> ./built_subpackages.txt
                done
              fi
            fi
          done<<<${CHANGED_FILES}
        else
          for pkg in ${{ github.event.inputs.packages }}; do
            echo "$pkg" >> ./built_packages.txt
            for subpkg in $(find "packages/${pkg}/" -maxdepth 1 -type f -name \*.subpackage.sh | sort); do
              echo "$(basename "${subpkg%%.subpackage.sh}")" >> ./built_subpackages.txt
            done
          done
        fi

        # Fix so that lists do not contain duplicates
        if [ -f ./built_packages.txt ]; then
          uniq ./built_packages.txt > ./built_packages.txt.tmp
          mv ./built_packages.txt.tmp ./built_packages.txt
        fi
        if [ -f ./built_subpackages.txt ]; then
          uniq ./built_subpackages.txt > ./built_subpackages.txt.tmp
          mv ./built_subpackages.txt.tmp ./built_subpackages.txt
        fi
        if [ -f ./deleted_packages.txt ]; then
          uniq ./deleted_packages.txt > ./deleted_packages.txt.tmp
          mv ./deleted_packages.txt.tmp ./deleted_packages.txt
        fi

        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

        if [ -f ./built_packages.txt ]; then
          ./scripts/lint-packages.sh $(cat ./built_packages.txt | awk '{print "packages/"$1"/build.sh"}')
          ./scripts/run-docker.sh ./build-package.sh -I -a ${{ matrix.target_arch }} $(cat ./built_packages.txt)
        fi

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

        # Put package lists into directory with *.deb files so they will be transferred to
        # upload job.
        test -f ./built_packages.txt && mv ./built_packages.txt ./debs/
        test -f ./built_subpackages.txt && cat ./built_subpackages.txt >> ./debs/built_packages.txt \
          && rm ./built_subpackages.txt
        test -f ./deleted_packages.txt && mv ./deleted_packages.txt ./debs/

        # 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-${{ matrix.target_arch }}-${{ github.sha }}.tar debs
    - 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@v2
      with:
        name: termux-packages-${{ matrix.target_arch }}-${{ github.sha }}
        path: ./artifacts

  upload:
    if: github.event_name != 'pull_request'
    needs: build
    runs-on: ubuntu-latest
    steps:
    - name: Clone repository
      uses: actions/checkout@v2
    - name: Get *.deb files
      uses: actions/download-artifact@v2
      with:
        path: ./
    - name: Upload to packages.termux.org
      env:
        REPOSITORY_NAME: termux-main
        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 archive in termux-packages-*/*.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
          aptly_add_to_repo

          # 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
    - name: Upload to grimler.se
      # Run even if upload to packages.termux.org failed:
      if: always()
      env:
        REPOSITORY_NAME: termux-main
        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

        # 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
          aptly_add_to_repo

          # 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
