name: Packages

on:
  push:
    branches:
    - master
    paths:
    - 'packages/**'
  pull_request:
    paths:
    - 'packages/**'

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: |
        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 "${BASE_COMMIT}" "HEAD")
        fi
        mkdir -p ./artifacts ./debs
        touch ./debs/.placeholder
        # Process tag '%ci:no-build' that may be added as line to commit message.
        # Forces CI to cancel current build with status 'passed'.
        if grep -qiP '^\s*%ci:no-build\s*$' <(git log --format="%B" -n 1 "HEAD"); then
          tar cf artifacts/debs-${{ matrix.target_arch }}.tar debs
          echo "[!] Force exiting as tag '%ci:no-build' was applied to HEAD commit message."
          exit 0
        fi
        # Build local Docker image if setup scripts were changed.
        # Useful for pull requests submitting changes for both build environment and packages.
        if grep -qP '^scripts/(Dockerfile|setup-ubuntu\.sh)$' <<< "$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}

        # 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 -o ./debs -I -a ${{ matrix.target_arch }} $(cat ./built_packages.txt)
        fi

        test -d ./termux-packages/debs && mv ./termux-packages/debs/* ./debs/
        # 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/
        # 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
      run: |
        find debs -type f -name "*.deb" -exec sha256sum "{}" \; | sort -k2
    - name: Store *.deb files
      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
      run: |
        for archive in termux-packages-*/*.tar; do
          tar xf "$archive"
        done

        # Function for deleting temporary directory with uploaded files from
        # the server.
        aptly_delete_dir() {
          echo "[$(date +%H:%M:%S)] Deleting uploads temporary directory..."

          curl_response=$(
            curl \
              --silent \
              --user "${{ secrets.APTLY_API_AUTH }}" \
              --user-agent "Termux-Packages/1.0 (https://github.com/termux/termux-packages)" \
              --request DELETE \
              --write-out "|%{http_code}" \
              https://packages.termux.org/aptly-api/files/${REPOSITORY_NAME}-${{ github.sha }}
          )

          http_status_code=$(echo "$curl_response" | cut -d'|' -f2)

          if [ "$http_status_code" != "200" ]; then
            echo "[$(date +%H:%M:%S)] Warning: server returned $http_status_code code while deleting temporary directory."
          fi
        }

        # Upload file to temporary directory.
        uploaded_files=false
        shopt -s nullglob
        for filename in $(cat debs/built_packages.txt | sed -E 's/(..*)/debs\/\1_\*.deb debs\/\1-static_\*.deb/g'); do
          curl_response=$(
            curl \
              --silent \
              --user "${{ secrets.APTLY_API_AUTH }}" \
              --user-agent "Termux-Packages/1.0 (https://github.com/termux/termux-packages)" \
              --request POST \
              --form file=@${filename} \
              --write-out "|%{http_code}" \
              https://packages.termux.org/aptly-api/files/${REPOSITORY_NAME}-${{ github.sha }} || true
          )

          http_status_code=$(echo "$curl_response" | cut -d'|' -f2)

          if [ "$http_status_code" = "200" ]; then
            echo "[$(date +%H:%M:%S)] Uploaded: $(echo "$curl_response" | cut -d'|' -f1 | jq -r '.[]' | cut -d'/' -f2)"
          elif [ "$http_status_code" = "000" ]; then
            echo "[$(date +%H:%M:%S)]: Failed to upload '$filename'. Server/proxy dropped connection during upload."
            echo "[$(date +%H:%M:%S)]: Aborting any further uploads."
            aptly_delete_dir
            exit 1
          else
            # Manually cleaning up the temporary directory to reclaim disk space.
            # Don't rely on scheduled server-side scripts.
            echo "[$(date +%H:%M:%S)] Error: failed to upload '$filename'. Server returned $http_status_code code."
            echo "[$(date +%H:%M:%S)] Aborting any further uploads."
            aptly_delete_dir
            exit 1
          fi

          uploaded_files=true
        done
        shopt -u nullglob

        # Publishing repository changes.
        if [ "$uploaded_files" = "true" ]; then
          echo "[$(date +%H:%M:%S)] Adding packages to repository '$REPOSITORY_NAME'..."

          # Retry up to 5 times.
          http_status_code=""
          for _ in {1..10}; do
            curl_response=$(
              set +e
              curl \
                --silent \
                --user "${{ secrets.APTLY_API_AUTH }}" \
                --user-agent "Termux-Packages/1.0 (https://github.com/termux/termux-packages)" \
                --request POST \
                --write-out "|%{http_code}" \
                https://packages.termux.org/aptly-api/repos/${REPOSITORY_NAME}/file/${REPOSITORY_NAME}-${{ github.sha }} || true
            )
            http_status_code=$(echo "$curl_response" | cut -d'|' -f2)

            if [ "$http_status_code" = "000" ]; then
              echo "[$(date +%H:%M:%S)] Warning: server/proxy has dropped connection, retrying in 10s (adding packages)..."
              sleep 10
              continue
            else
              break
            fi
          done

          if [ "$http_status_code" = "200" ]; then
            warnings=$(echo "$curl_response" | cut -d'|' -f1 | jq '.Report.Warnings' | jq -r '.[]')
            if [ -n "$warnings" ]; then
              echo "[$(date +%H:%M:%S)] APTLY WARNINGS (NON-CRITICAL):"
              echo
              echo "$warnings"
              echo
            fi
          else
            echo "[$(date +%H:%M:%S)] Error: got http_status_code == '$http_status_code', packages may not appear in repository."
          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.
          echo "[$(date +%H:%M:%S)] Publishing repository changes..."
          # Retry up to 5 times.
          http_status_code=""
          for _ in {1..10}; do
            curl_response=$(
              set +e
              curl \
                --silent \
                --user "${{ secrets.APTLY_API_AUTH }}" \
                --user-agent "Termux-Packages/1.0 (https://github.com/termux/termux-packages)" \
                --header 'Content-Type: application/json' \
                --request PUT \
                --data '{"Signing": {"Passphrase": "${{ secrets.GPG_PASSPHRASE }}"}}' \
                --write-out '|%{http_code}' \
                https://packages.termux.org/aptly-api/publish/${REPOSITORY_NAME}/${REPOSITORY_DISTRIBUTION} || true
            )
            http_status_code=$(echo "$curl_response" | cut -d'|' -f2)

            if [ "$http_status_code" = "000" ]; then
              echo "[$(date +%H:%M:%S)] Warning: server/proxy has dropped connection, retrying in 10s (publishing changes)..."
              sleep 10
              continue
            else
              break
            fi
          done

          if [ "$http_status_code" = "200" ]; then
            echo "[$(date +%H:%M:%S)] Repository has been updated successfully."
          elif [ "$http_status_code" = "000" ]; then
            echo "[$(date +%H:%M:%S)] Error: server/proxy has dropped connection."
            # Ignore - nothing can be done with that unless we change proxy.
            #exit 1
          else
            echo "[$(date +%H:%M:%S)] Error: got http_status_code == '$http_status_code'"
            exit 1
          fi
        fi