name: Setup NGINX service for Linux/macOS/Windows
author: Yuri Astrakhan
description: Setup and run NGINX server on all platforms.
branding:
  icon: server
  color: purple
inputs:
  port:
    description: The port number to use for the NGINX service, unless conf-file-text is set.
    default: "8080"
    required: false
  conf-file-text:
    description: The text of the entire configuration file to use for NGINX. This will ignore some other inputs.
    default: ""
    required: false
outputs:
  bin:
    description: The path to the NGINX binary.
    value: ${{ steps.detect_config.outputs.nginx_bin }}
  conf-path:
    description: The path to the NGINX configuration file.
    value: ${{ steps.detect_config.outputs.conf_file }}
  html-dir:
    description: Default directory NGINX service uses as the root. This can be overridden by conf-file-text.
    value: ${{ steps.detect_config.outputs.html_dir }}
  pid:
    description: The process ID of the NGINX service.
    value: ${{ steps.detect_status.outputs.pid }}
  port:
    description: The port number used by the NGINX service.
    value: ${{ steps.detect_status.outputs.port }}
  access-log:
    description: The path to the NGINX access log file, unless conf-file-text is provided.
    value: ${{ steps.detect_config.outputs.access_log }}
  error-log:
    description: The path to the NGINX error log file, unless conf-file-text is provided.
    value: ${{ steps.detect_config.outputs.error_log }}
runs:
  using: composite
  steps:
    - name: Install NGINX (Linux)
      id: init_linux
      if: runner.os == 'Linux'
      shell: bash
      run: |
        echo "Init NGINX on ${{runner.os}} ${{runner.arch}} ${{runner.environment}} runner"
        sudo systemctl status nginx || true
        NGINX_BIN=$(which nginx)
        nginx_info="$(sudo "$NGINX_BIN" -V 2>&1)"
        echo "sudo $NGINX_BIN -V"
        echo "$nginx_info"
        nginx_prefix=$(echo "$nginx_info" | grep 'configure arguments:' | sed -n -e 's/.*--prefix=\(.*\)/\1/p' | cut -d' ' -f1)
        [ -d "$nginx_prefix" ] || { echo "NGINX prefix directory $nginx_prefix could not be determined"; exit 1; }
        echo "nginx_bin=$NGINX_BIN" >> $GITHUB_OUTPUT
        CONF_FILE=$(sudo nginx -t 2>&1 | sed -n -e 's/.*configuration file \(.*\) test .*/\1/p' | head -1)
        sudo chown -R $(whoami) $CONF_FILE
        echo "conf_file=$CONF_FILE" >> $GITHUB_OUTPUT
        echo "log_dir=/var/log/nginx" >> $GITHUB_OUTPUT
        echo "html_dir=$nginx_prefix/html" >> $GITHUB_OUTPUT

    - name: Install NGINX (macOS)
      id: init_macos
      if: runner.os == 'macOS'
      shell: bash
      run: |
        echo "Init NGINX on ${{runner.os}} ${{runner.arch}} ${{runner.environment}} runner"
        brew install nginx
        brew services list | grep nginx
        NGINX_BIN=$(which nginx)
        nginx_info="$(sudo "$NGINX_BIN" -V 2>&1)"
        echo "sudo $NGINX_BIN -V"
        echo "$nginx_info"
        nginx_prefix=$(echo "$nginx_info" | grep 'configure arguments:' | sed -n -e 's/.*--prefix=\(.*\)/\1/p' | cut -d' ' -f1)
        [ -d "$nginx_prefix" ] || { echo "NGINX prefix directory $nginx_prefix could not be determined"; exit 1; }
        echo "nginx_bin=$NGINX_BIN" >> $GITHUB_OUTPUT
        CONF_FILE=$(sudo nginx -t 2>&1 | sed -n -e 's/.*configuration file \(.*\) test .*/\1/p' | head -1)
        sudo chown -R $(whoami) $CONF_FILE
        echo "conf_file=$CONF_FILE" >> $GITHUB_OUTPUT
        echo "html_dir=$nginx_prefix/html" >> $GITHUB_OUTPUT
        if [[ -d /usr/local/var/log/nginx ]]; then
            echo "log_dir=/usr/local/var/log/nginx" >> $GITHUB_OUTPUT
        else
            echo "log_dir=/opt/homebrew/var/log/nginx" >> $GITHUB_OUTPUT
        fi

    - name: Install NGINX (Windows)
      id: init_windows
      if: runner.os == 'Windows'
      shell: pwsh
      run: |
        Write-Output "Init NGINX on ${{runner.os}} ${{runner.arch}} ${{runner.environment}} runner"
        Get-Service nginx -ErrorAction SilentlyContinue
        $nginx_root = Join-Path "C:\tools\" (Get-Item C:\tools\nginx*).Name
        $nginx_bin = Join-Path $nginx_root "nginx"
        $conf_file = Join-Path $nginx_root "\conf\nginx.conf"
        & $nginx_bin -V
        Add-Content -Path $env:GITHUB_OUTPUT -Encoding utf8 -Value "nginx_root=$nginx_root"
        Add-Content -Path $env:GITHUB_OUTPUT -Encoding utf8 -Value "nginx_bin=$nginx_bin"
        Add-Content -Path $env:GITHUB_OUTPUT -Encoding utf8 -Value "conf_file=$conf_file"
        Add-Content -Path $env:GITHUB_OUTPUT -Encoding utf8 -Value "log_dir=$nginx_root\logs"
        Add-Content -Path $env:GITHUB_OUTPUT -Encoding utf8 -Value "html_dir=$nginx_root\html"
        Get-Content -Path $env:GITHUB_OUTPUT

    - name: NGINX info
      id: detect_config
      shell: bash
      run: |
        echo 'Detected NGINX configuration for ${{ runner.os }} ${{ runner.arch }} on ${{ runner.name }}:'
        if [[ '${{ runner.os }}' == 'Linux' ]]; then
          nginx_bin='${{ steps.init_linux.outputs.nginx_bin }}'
          conf_file='${{ steps.init_linux.outputs.conf_file }}'
          html_dir='${{ steps.init_linux.outputs.html_dir }}'
          access_log='${{ steps.init_linux.outputs.log_dir }}/access.log'
          error_log='${{ steps.init_linux.outputs.log_dir }}/error.log'
        elif [[ '${{ runner.os }}' == 'macOS' ]]; then
          nginx_bin='${{ steps.init_macos.outputs.nginx_bin }}'
          conf_file='${{ steps.init_macos.outputs.conf_file }}'
          html_dir='${{ steps.init_macos.outputs.html_dir }}'
          access_log='${{ steps.init_macos.outputs.log_dir }}/access.log'
          error_log='${{ steps.init_macos.outputs.log_dir }}/error.log'
        elif [[ '${{ runner.os }}' == 'Windows' ]]; then
          nginx_bin='${{ steps.init_windows.outputs.nginx_bin }}'
          conf_file='${{ steps.init_windows.outputs.conf_file }}'
          html_dir='${{ steps.init_windows.outputs.html_dir }}'
          access_log='${{ steps.init_windows.outputs.log_dir }}\access.log'
          error_log='${{ steps.init_windows.outputs.log_dir }}\error.log'
        else
          echo 'Unknown OS: ${{ runner.os }}'
          exit 1
        fi

        echo '::group::Original NGINX config file'
        cat "$conf_file"
        echo '::endgroup::NGINX config file'

        echo "nginx_bin=$nginx_bin" >> $GITHUB_OUTPUT
        echo "conf_file=$conf_file" >> $GITHUB_OUTPUT
        echo "html_dir=$html_dir" >> $GITHUB_OUTPUT
        echo "access_log=$access_log" >> $GITHUB_OUTPUT
        echo "error_log=$error_log" >> $GITHUB_OUTPUT
        cat $GITHUB_OUTPUT

    - name: Overwrite NGINX configuration file
      if: inputs.conf-file-text != ''
      shell: bash
      run: |
        echo "Overwrite NGINX config ${{ steps.detect_config.outputs.conf_file }} for ${{ runner.os }} ${{ runner.arch }} on ${{ runner.name }} with the value of the input parameter."
        echo "${{ inputs.conf-file-text }}" > "${{ steps.detect_config.outputs.conf_file }}"

    - name: Create new NGINX configuration file
      if: inputs.conf-file-text == ''
      shell: bash
      run: |
        echo "Create new NGINX config ${{ steps.detect_config.outputs.conf_file }} for ${{ runner.os }} ${{ runner.arch }} on ${{ runner.name }}."
        cat <<EOF > "${{ steps.detect_config.outputs.conf_file }}"
        worker_processes 1;
        events {
            worker_connections 1024;
        }
        http {
            include mime.types;
            default_type application/octet-stream;
            sendfile on;
            keepalive_timeout 65;
        
            server {
                listen ${{ inputs.port }};
                server_name localhost;
        
                location / {
                    root html;
                    index index.html index.htm;
                }
        
                error_page 500 502 503 504 /50x.html;
                location = /50x.html {
                    root html;
                }
            }
        }
        EOF

    - name: Start NGINX (Linux)
      if: runner.os == 'Linux'
      id: start_linux
      shell: bash
      run: |
        echo "Start NGINX ${{ steps.detect_config.outputs.nginx_bin }} on ${{runner.os}} using ${{ steps.detect_config.outputs.conf_file }}"
        echo "::group::New NGINX configuration"
        sudo ${{ steps.detect_config.outputs.nginx_bin }} -T
        echo "::endgroup::"
        sudo systemctl start nginx
        sleep 2  # TODO: wait for the service to start in a loop instead of hardcoding a delay
        sudo systemctl status nginx || true
        echo "pid=$(systemctl show -p MainPID nginx | cut -d= -f2)" >> $GITHUB_OUTPUT
        echo "port=$(sudo netstat -tulnp | grep nginx | awk '{print $4}' | sed -n -e 's/.*:\([0-9]*\)/\1/p' | head -1)" >> $GITHUB_OUTPUT

    - name: Start NGINX (macOS)
      if: runner.os == 'macOS'
      id: start_macos
      shell: bash
      run: |
        echo "Start NGINX ${{ steps.detect_config.outputs.nginx_bin }} on ${{runner.os}} using ${{ steps.detect_config.outputs.conf_file }}"
        echo "::group::New NGINX configuration"
        sudo ${{ steps.detect_config.outputs.nginx_bin }} -T
        echo "::endgroup::"
        brew services list | grep nginx
        # There are some issues with starting nginx on macOS, so we force sudo. Expert help is welcome.
        sudo nginx
        # brew services start nginx
        sleep 2
        brew services list | grep nginx
        if [[ -d /usr/local/var/log/nginx ]]; then
          echo "pid=$(cat /usr/local/var/run/nginx.pid)" >> $GITHUB_OUTPUT
        else
          echo "pid=$(cat /opt/homebrew/var/run/nginx.pid)" >> $GITHUB_OUTPUT
        fi
        echo "port=$(sudo lsof -iTCP -sTCP:LISTEN -n -P | grep nginx | awk '{print $9}' | cut -d':' -f2 | head -1)" >> $GITHUB_OUTPUT

    - name: Start NGINX (Windows)
      if: runner.os == 'Windows'
      id: start_windows
      shell: pwsh
      run: |
        Write-Output "Start NGINX ${{ steps.detect_config.outputs.nginx_bin }} on ${{runner.os}} using ${{ steps.detect_config.outputs.conf_file }}"
        Write-Output "::group::New NGINX configuration"
        pushd ${{ steps.init_windows.outputs.nginx_root }}
        & ${{ steps.detect_config.outputs.nginx_bin }} -T
        popd
        Write-Output "::endgroup::"

        Set-Service nginx -StartupType manual
        Start-Service nginx
        Start-Sleep -Seconds 5
        Get-Service nginx
        Get-Process -Name nginx

        $processes = Get-Process -Name nginx
        $found = $false
        foreach ($process in $processes) {
            $connections = Get-NetTCPConnection -OwningProcess $process.Id -State Listen -ErrorAction SilentlyContinue
            if ($?) {
                foreach ($connection in $connections) {
                    if ($connection) {
                      Add-Content -Path $env:GITHUB_OUTPUT -Encoding utf8 -Value "pid=$($process.Id)"
                      Add-Content -Path $env:GITHUB_OUTPUT -Encoding utf8 -Value "port=$($connection.LocalPort)"
                      $found = $true
                      break
                    }
                }
                if ($found) {
                    break
                }
            }
        }
        
        Get-Content -Path $env:GITHUB_OUTPUT

    - name: Output NGINX info
      id: detect_status
      shell: bash
      run: |
        echo "NGINX service was started for ${{ runner.os }} ${{ runner.arch }} on ${{ runner.name }}"
        if [[ "${{ runner.os }}" == "Linux" ]]; then
            echo "pid=${{ steps.start_linux.outputs.pid }}" >> $GITHUB_OUTPUT
            echo "port=${{ steps.start_linux.outputs.port }}" >> $GITHUB_OUTPUT
        elif [[ "${{ runner.os }}" == "macOS" ]]; then
            echo "pid=${{ steps.start_macos.outputs.pid }}" >> $GITHUB_OUTPUT
            echo "port=${{ steps.start_macos.outputs.port }}" >> $GITHUB_OUTPUT
        elif [[ "${{ runner.os }}" == "Windows" ]]; then
            echo "pid=${{ steps.start_windows.outputs.pid }}" >> $GITHUB_OUTPUT
            echo "port=${{ steps.start_windows.outputs.port }}" >> $GITHUB_OUTPUT
        else
            exit 1
        fi
        cat $GITHUB_OUTPUT