用electron自己的nodejs写的depot_tools 工具下载 构建源码

# making 'release' and 'testing' builds from master

$ e init master-testing -i testing --root=~/src/electron
Creating '~/src/electron'
New build config 'master-testing' created
Now using config 'master-testing'
$ e show current
master-testing

$ e init master-release -i release --root=~/src/electron
INFO Root '~/src/electron' already exists.
INFO (OK if you are sharing $root between multiple build configs)
New build config 'master-release' created
Now using config 'master-release'

$ e show configs
* master-release
  master-testing

$ e show current
master-release
$ e show root
~/src/electron

$ e use master-testing
Now using config 'master-testing'
$ e show current
master-testing
$ e show root
~/src/electron

{
  "goma": "none",
  "root": "C:\dev\electron7",
  "origin": {
    "electron": "git@github.com:electron/electron.git",
    "node": "git@github.com:electron/node.git"
  },
  "gen": {
    "args": [
      "import("//electron/build/args/testing.gn")"
    ],
    "out": "Testing"
  },
  "env": {
    "CHROMIUM_BUILDTOOLS_PATH": "C:\dev\electron7\src\buildtools",
    "GIT_CACHE_PATH": "C:\Users\Administrator\.git_cache",
    "DEPOT_TOOLS_WIN_TOOLCHAIN": 0
  }
}


和depot_tools 使用目录有关的源码在 .electron_build_toolssrc下：
evm-config.js
utilsdepot-tools.js 

下载想要的分支，用
git branch -vv 
可以看到本地分支关联的是哪个远程分支。

修改 .gclient 里面的url：
https//github/electron/electron@7-3-x

删除掉已经下载的src目录。重新同步代码：
e sync -vvvv
可以看到是指定的分支下载了。

因为用的unmanaged，所以切换分支是不行的，以前unmanaged就丢掉了。
是不是需要先upstream到远程分支。再操作。

$ e sync 
Running "gclient sync --with_branch_heads --with_tags" in '~/src/electron/src'
[sync output omitted]

rem set PATH=D:develectron7srcoutTesting;%PATH%
set DEPOT_TOOLS_DIR=D:develectron-masterelectrondepot_tools
set DEPOT_TOOLS_WIN_TOOLCHAIN=0
set GIT_CACHE_PATH=D:\dev\.git_cache
set depot-tools=D:develectron-masterelectrondepot_tools
set PATH=%depot-tools%ootstrap-3_8_0_chromium_8_binpythoninscripts;%PATH%

C:dev>e init --root=develectron mymaster
WARN A fixable error has occurred
--> git config --global core.filemode must be set to false.
Do you want build-tools to try fix this for you? [y/n]: y

Running "git config --global core.filemode false"
WARN A fixable error has occurred
--> git config --global core.autocrlf must be set to false.
Do you want build-tools to try fix this for you? [y/n]: y

Running "git config --global core.autocrlf false"
WARN A fixable error has occurred
--> git config --global branch.autosetuprebase must be set to always.
Do you want build-tools to try fix this for you? [y/n]: y

Running "git config --global branch.autosetuprebase always"
WARN A fixable error has occurred
--> A required dependency "choco" could not be located, it probably has to be installed.
Do you want build-tools to try fix this for you? [y/n]: y

Running "powershell -Command Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))"
WARN A fixable error has occurred
--> A required dependency "python" could not be located, it probably has to be installed.
Do you want build-tools to try fix this for you? [y/n]: y

Running "choco install python2 --yes"
WARN A fixable error has occurred
--> A required dependency "pywin32" could not be located, it probably has to be installed.
Do you want build-tools to try fix this for you? [y/n]: y

Running "choco install pywin32 --yes"

C:dev>e init --root=develectron mymaster
Creating develectron
Cloning "depot_tools" into C:UsersAdministrator.electron_build_tools	hird_partydepot_tools
Updating C:UsersAdministrator.electron_build_tools	hird_partydepot_tools
Running "cmd.exe /c C:UsersAdministrator.electron_build_tools	hird_partydepot_toolsupdate_depot_tools.bat"
Downloading CIPD client for windows-amd64 from https://chrome-infra-packages.appspot.com/client?platform=windows-amd64&version=git_revision:9f9afb5ef6ef9d4887e8aa2bb617dfdd798f8005...
Running "python C:UsersAdministrator.electron_build_tools	hird_partydepot_toolsgclient.py config --name src/electron --unmanaged https://github.com/electron/electron" in develectron
Creating C:UsersAdministrator.electron_build_toolsconfigs
New build config mymaster created in C:UsersAdministrator.electron_build_toolsconfigsevm.mymaster.json
Now using config mymaster