查看“Git”的源代码

== SSH key生成 ==
=== windows ===
<source lang="shell">
#生成ssh key的命令
qingwyan@QINGWYAN-FTCEW MINGW64 ~/Desktop/git
$ ssh-keygen -t rsa -C "qingwyan@cisco.com"

# 进入到生成的ssh key目录
qingwyan@QINGWYAN-FTCEW MINGW64 ~/Desktop/git
$ cd /c/Users/qingwyan/.ssh

# copy到剪切板
qingwyan@QINGWYAN-FTCEW MINGW64 ~/.ssh
$ clip < id_rsa.pub
</source>

== 常见错误 ==
=== git pull/fetch: unable to update local ref ===
* 现象
<source lang="shell">
[qingwyan@crdc-sdn-ucs2 rpd-service-manager]$ git fetch

error: there are still refs under 'refs/remotes/origin/bugfix/haofan'
From ssh://bitbucket-eng-sjc1.cisco.com:7999/cmtsorch/rpd-service-manager
 ! [new branch]      bugfix/haofan -> origin/bugfix/haofan  (unable to update local ref)
</source>
* 解决方案：删除文件
<source lang="shell">
rm -rf .git/refs/remotes/origin/bugfix/haofan
</source>
* 新的问题
<source lang="shell">
[qingwyan@crdc-sdn-ucs2 rpd-service-manager]$ git fetch

error: 'refs/remotes/origin/bugfix/haofan/device-key' exists; cannot create 'refs/remotes/origin/bugfix/haofan'
From ssh://bitbucket-eng-sjc1.cisco.com:7999/cmtsorch/rpd-service-manager
 ! [new branch]      bugfix/haofan -> origin/bugfix/haofan  (unable to update local ref)
error: some local refs could not be updated; try running
 'git remote prune origin' to remove any old, conflicting branches
</source>
* 按提示删除
<source lang="shell">
git remote prune origin
</source>
== 常用命令 ==
=== 当前分支commit数量 ===
<source lang="shell">
# 获取当前分支的 commit 数量
git rev-list HEAD --count

# 比上面的少点 ---上面的会有重复的，少了些重复的， >< 我也不知道。。。
git rev-list HEAD --count --first-parent
</source>
=== 回滚到上一个commit ===
<source lang="shell">
git reset --hard <commit_id>
git push origin HEAD --force
</source>

=== git diff忽略^M ===
<source lang="shell">
git config --global core.whitespace cr-at-eol
</source>