GitHub Actions中PR任务成功但未创建PR且无内容推送求助

配置了一个GitHub Actions工作流，目标是通过Gradle任务从.proto文件生成Kotlin文件，并将生成文件推送到另一个仓库。工作流执行到Verify pushed branch步骤均正常，分支和提交已成功创建，但Create Pull Request步骤未能创建PR，也无相关输出。

工作流文件如下：

name: Generate Kotlin

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]
  workflow_dispatch:

jobs:
  generate-kotlin:
    runs-on: ubuntu-latest

steps:
  - name: Checkout repo
    uses: actions/checkout@v4

  - name: List directory structure before building
    run: ls -R

  - name: Generate Protos
    run: ./gradlew generateProtos

  - name: List directory structure after building
    run: ls -R

  - name: List generated Kotlin files for debugging
    run: ls -R lib/build/generated/source/wire/ || echo "Directory not found"

  - name: Upload generated Kotlin files
    uses: actions/upload-artifact@v4
    with:
      name: generated-kotlin-files
      path: lib/build/generated/source/wire/**/*.kt

  - name: Checkout target repo
    uses: actions/checkout@v4
    with:
      repository: 'ksharma-xyz/Kotlin-Proto'
      token: ${{ secrets.TOKEN }}

  - name: Download artifact
    uses: actions/download-artifact@v4
    with:
      name: generated-kotlin-files
      path: ./generated

  - name: List downloaded files
    run: ls -R ./generated

  - name: Configure Git
    run: |
      git config --global user.name 'github-actions[bot]'
      git config --global user.email 'github-actions[bot]@users.noreply.github.com'
      git config --global init.defaultBranch main

  - name: Create a new branch
    run: git checkout -b kotlin

  - name: Copy generated files to target repo
    run: |
      mkdir -p kotlin
      touch test.txt
      cp -r ./generated/* kotlin/
      ls -R kotlin/ || echo "Copy failed"

  - name: Create Commit
    run: |
      git add .
      git commit -m "Kotlin Files"

  - name: Push changes to target repo
    run: git push --set-upstream origin kotlin

  - name: Verify pushed branch
    run: |
      git fetch
      git checkout kotlin
      git log -1

  - name: Create Pull Request
    uses: peter-evans/create-pull-request@v6
    with:
      token: ${{ secrets.TOKEN }}
      commit-message: "Add generated Kotlin files from ksharma-xyz/Proto-API"
      branch: kotlin
      title: "Add generated Kotlin files from main project"
      body: "This PR adds the generated Kotlin files from the main project."
      base: main
      committer: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
      author: ksharma-xyz <55722391+ksharma-xyz@users.noreply.github.com>
      signoff: false
      delete-branch: false
      draft: false

核心原因 #

peter-evans/create-pull-request 动作的设计逻辑是基于当前工作目录的未提交/未推送变更来创建PR。你的工作流中已经手动执行了git push，将分支推送到远程仓库，此时本地工作目录没有待推送的变更，动作检测不到触发条件，因此不会执行PR创建操作。

修复方案 #

方案1：让create-pull-request 处理提交与推送 #

移除手动的git commit和git push步骤，由该动作自动处理提交、分支创建和PR创建，确保动作能识别到本地变更：

# 移除以下手动提交推送步骤：
# - name: Create Commit
#   run: |
#     git add .
#     git commit -m "Kotlin Files"
#
# - name: Push changes to target repo
#   run: git push --set-upstream origin kotlin
#
# - name: Verify pushed branch
#   run: |
#     git fetch
#     git checkout kotlin
#     git log -1

# 保留并直接使用该动作：
- name: Create Pull Request
  uses: peter-evans/create-pull-request@v6
  with:
    token: ${{ secrets.TOKEN }}
    commit-message: "Add generated Kotlin files from ksharma-xyz/Proto-API"
    branch: kotlin
    title: "Add generated Kotlin files from main project"
    body: "This PR adds the generated Kotlin files from the main project."
    base: main
    committer: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
    author: ksharma-xyz <55722391+ksharma-xyz@users.noreply.github.com>
    signoff: false
    delete-branch: false
    draft: false

该动作会自动检测本地变更，创建分支、提交并推送，然后生成PR。

方案2：手动触发PR创建（针对已推送的分支） #

如果需要保留手动推送步骤，可以使用GitHub API直接创建PR，替代create-pull-request动作：

- name: Create Pull Request via GitHub API
  run: |
    curl -X POST \
      -H "Authorization: token ${{ secrets.TOKEN }}" \
      -H "Accept: application/vnd.github.v3+json" \
      https://api.github.com/repos/ksharma-xyz/Kotlin-Proto/pulls \
      -d '{
        "title": "Add generated Kotlin files from main project",
        "body": "This PR adds the generated Kotlin files from the main project.",
        "head": "kotlin",
        "base": "main"
      }'

额外注意事项 #

• 若kotlin分支已存在，无论是哪种方案都可能失败。建议改用动态分支名（比如kotlin-generated-${{ github.sha }}），避免分支冲突。
• 确保secrets.TOKEN拥有目标仓库的repo权限，能够创建分支和PR。

内容的提问来源于stack exchange，提问作者Karan Sharma