1. 获取crashpad的版本信息

   • libcc/src/third_party/crashpad/README.chromium将会有一个带有 校验和（checksum）的Revision:信息
   • 检出到相应的分支
   • 获取Google的奔溃报告 (https://chromium.googlesource.com/crashpad/crashpad)，
   • git clone https://chromium.googlesource.com/crashpad/crashpad

   • 用版本校验和检出分支

     • git checkout <revision checksum>
   • 将electron的奔溃报告分支作为远程
   • git remote add electron https://github.com/electron/crashpad
   • 为更新检出一个新的分支
   • git checkout -b electron-crashpad-vA.B.C.D
   • A.B.C.D是 Chromium 的版本，可以在 libcc/VERSION中查看，版本信息将应类似于 62.0.3202.94

2. 用git log --oneline为Electron的补丁生成一个分支列表。

   • 可参考https://github.com/electron/crashpad/commits/previous-branch-name

3. 每一个补丁：

   • 在electron-crashpad-vA.B.C.D中, 单向拣取补丁的校验和
   • git cherry-pick <checksum>
   • 消除冲突
   • 首先确保它能构建成功，然后依次执行add, commit, 和 push，将补丁添加到electron 的 crashpad 分支
   • git push electron electron-crashpad-vA.B.C.D

4. 更新Electron，创建新的crashpad分支：

   • cd vendor/crashpad
   • git fetch
   • git checkout electron-crashpad-v62.0.3202.94

5. 为两个版本的Electron重新生成相应的Ninja文件

   • 在Electron根目录的上一级目录中，运行 script/update.py
   • script/build.py -c D --target=crashpad_client
   • script/build.py -c D --target=crashpad_handler
   • 确保两个构建过程没有抛出异常，

6. 将变更内容Push到子模块的引用部分。

   • (在 electron 的根目录下) git add vendor/crashpad
   • git push origin upgrade-to-chromium-62

Upgrading Crashpad

1. Get the version of crashpad that we're going to use.

• libcc/src/third_party/crashpad/README.chromium will have a line Revision: with a checksum

  • We need to check out the corresponding branch.

• Clone Google's crashpad (https://chromium.googlesource.com/crashpad/crashpad)

  • git clone https://chromium.googlesource.com/crashpad/crashpad

• Check out the branch with the revision checksum:

  • git checkout <revision checksum>

• Add electron's crashpad fork as a remote

  • git remote add electron https://github.com/electron/crashpad

• Check out a new branch for the update

  • git checkout -b electron-crashpad-vA.B.C.D
  • A.B.C.D is the Chromium version found in libcc/VERSION and will be something like 62.0.3202.94

2. Make a checklist of the Electron patches that need to be applied with git log --oneline

   • Or view https://github.com/electron/crashpad/commits/previous-branch-name

3. For each patch:

• In electron-crashpad-vA.B.C.D, cherry-pick the patch's checksum

  • git cherry-pick <checksum>
• Resolve any conflicts

• Make sure it builds then add, commit, and push work to electron's crashpad fork

  • git push electron electron-crashpad-vA.B.C.D

4. Update Electron to build the new crashpad:

• cd vendor/crashpad
• git fetch
• git checkout electron-crashpad-v62.0.3202.94

5. Regenerate Ninja files against both targets

• From Electron root's root, run script/update.py
• script/build.py -c D --target=crashpad_client
• script/build.py -c D --target=crashpad_handler
• Both should build with no errors

6. Push changes to submodule reference

• (From electron root) git add vendor/crashpad
• git push origin upgrade-to-chromium-62