如果不是拉取请求，则仅运行GitHub操作步骤

我有一个工作流需要在推送或拉取请求上执行，除了最后一步将包推送到 NuGet（我不希望在拉取请求上发生这种情况，即使是掌握）。

如果工作流是从拉取请求触发的，如何防止发布 NuGet 步骤运行？

name: .NET Core

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:
  build:

    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v2
    - name: Setup .NET Core
      uses: actions/setup-dotnet@v1
      with:
        dotnet-version: 3.1.101
    - name: Install dependencies
      run: dotnet restore
    - name: Build
      run: dotnet build --configuration Release --no-restore
    - name: Test
      run: dotnet test --no-restore --verbosity normal
    - name: Publish NuGet
      uses: brandedoutcast/publish-nuget@v2.5.2
      with:
        PROJECT_FILE_PATH: "Orleans.Sagas/Orleans.Sagas.csproj"
        NUGET_KEY: ${{secrets.NUGET_KEY}}

回答

 - name: Publish NuGet
   uses: brandedoutcast/publish-nuget@v2.5.2
   with:
     PROJECT_FILE_PATH: "Orleans.Sagas/Orleans.Sagas.csproj"
     NUGET_KEY: ${{secrets.NUGET_KEY}}
   if: github.event_name != 'pull_request'