Android 惯用工作命令mmm,mm,m,croot,cgrep,jgrep,resgrep,godir,快速查找 find grep合并使用

Android 常用工作命令mmm,mm,m,croot,cgrep,jgrep,resgrep,godir在大整个android 源代码的 java,xml,mk里面查找内容快速命令官方定义：
Invoke “. build/envsetup.sh” from your shell to add the following functions to your environment:– croot: Changes directory to the top of the tree.
– m: Makes from the top of the tree.
– mm: Builds all of the modules in the current directory.
– mmm: Builds all of the modules in the supplied directories.– mgrep: Greps on all local .mk files.  在目录下所有.mk文件里面查找内容 mgrep android_ap
– cgrep: Greps on all local C/C++ files.
– jgrep: Greps on all local Java files.   在目录下所有.java文件里面查找内容 jgrep android_ap
– resgrep: Greps on all local res/*.xml files.
– godir: Go to the directory containing a file.
即在已经下载好Android源码android目录下面执行：. build/envsetup.sh 或source build/envsetup.sh,即可开始使用上面命令