好久没记录shell相关的代码了，现在记录一下吧。
cut
这个命令顾名思义，就是可以裁剪一串字符串，怎么裁剪，当然是根据分隔符。
-d
后面是分隔符
-f
打印分割后的相关域
实践
user@host037-ubuntu-1804:~/android/.repo/manifests$ git branch -a
* default
remotes/m/zhimo-mr1 -> origin/zhimo-mr1
remotes/origin/android-clang-dev
remotes/origin/android-llvm
remotes/origin/android-llvm-dev
remotes/origin/aosp/android-10.0.0_r20
remotes/origin/aosp/android-10.0.0_r25
remotes/origin/aosp/android-10.0.0_r29
remotes/origin/eswin-master
remotes/origin/master
remotes/origin/zhimo-aosp
remotes/origin/zhimo-gcc
remotes/origin/zhimo-kernel
remotes/origin/zhimo-mr1
remotes/origin/zhimo-mr1-dev
如果只想打印第三行的分支，则可以:
~/android/.repo/manifests$ git branch -a | cut -d / -f 3
* default
zhimo-mr1 -> origin
android-clang-dev
android-llvm
android-llvm-dev
aosp
aosp
aosp
eswin-master
master
zhimo-aosp
zhimo-gcc
zhimo-kernel
zhimo-mr1
zhimo-mr1-dev