ubuntu 下shell 命令的学习1----（编写自动化安装脚本）

     今天安装opencv2.3.0在自己的机器上，因为觉得用脚本执行一系列安装的命令比较方便，所有花了一天的时间初步学习了怎么编写最简单的shell 脚本。

     首先安装Opencv2.3.0需要cmake 配合。所以去官网上下载了cmake2.8的源码进行编译安装。

     其实安装cmake 的步骤并不复杂，需要先安装g++ 然后在cmake 的目录里面make && make install 。但是今天要使用shell 脚本来执行自动下载和安装就比较麻烦了。附上源代码。

     代码本身并作过多的解释，应该很容易看得懂，就是首先下载，然后解压，然后判断当前的系统是否已经安装了g++，之后在编译安装。

     不过最要命的问题是在执行shell脚本的时候会出现:unexpected operator.这样的错误。查阅资料后发现了解决的方法，在我的另外一篇文字中http://blog.csdn.net/bush2582/article/details/20140871

    之后，就顺顺利利的搞定了。

#########################################################################
# File Name: Install_cmake.sh
# Author: ma6174
# mail: [email protected]
# Created Time: 2014年02月28日 星期五 13时32分53秒
#########################################################################
#!/bin/bash


##############################################
# FunctionName:echocolor
# Author: bush2582
# Role:the output will have color
# Created Time: 
##############################################
echocolor(  )
{
	  echo -e "\e[0;33m${@}\e[0m";
}



##############################################
# FunctionName:InstallGCC
# Author: bush2582
# Role:check g++ is already in system
# Created Time: 
##############################################
function InstallGCC (  )
{
	
	which g++;
	if [ $? -eq 1 ];
	then
		read -p " g++ is not installed in this system do you want to install? (Y/y/n/N) " ynInstall_GCC;
		
		if [ $ynInstall_GCC = "Y" ] || [ $ynInstall_GCC = "y" ] ;
		then
			#echo " now we will install g++ ";
			echocolor "now we will install g++"
			sudo apt-get install g++;
		fi
	else
		echocolor "g++ already install in this system ";
	fi
}
##############################################
# FunctionName:InstallCmake
# Author: bush2582
# Role:install Cmake
# Created Time: 
##############################################

function InstallCmake(  )
{
	  InstallGCC;
	  echocolor " now we will star the program that CMake is installed in this system ";
	  cd cmake-2.8.0;
	  ./configure;
	  sudo make;
	  sudo make install;
	  exit 0;
}




#########################################################################
read -p "Do you want to download Cmake? (Y/y/n/N)?" downyn
if [ $downyn = "Y" ] || [ $downyn = "y" ];
then 
	wget http://down1.chinaunix.net/distfiles/cmake-2.8.0.tar.gz;
	echocolor "now Staring Tar cmake";
	tar -xvf cmake-2.8.0.tar.gz;
else
	echocolor "now Staring Tar cmake";
	tar -xvf cmake-2.8.0.tar.gz;
fi

read -p " Do you want to install camke now (Y/y/n/N)? " yn
if [ $yn = "y"  ] || [ $yn = "Y"  ] ;
then	
	InstallCmake;
else
	exit 0;
fi

#######################################################################
# File Name: LoadOpencv.sh
# Author: ma6174
# mail: [email protected]
# Created Time: 2014年02月28日 星期五 10时46分11秒
#########################################################################
#!/bin/bash

#--------------------------------------------#
# FunctionName:echocolor
# Author: bush2582
# Role:the output will have color
# Created Time: 
#--------------------------------------------#
echocolor(  )
{
	  echo -e "\e[0;33m${@}\e[0m";
	  
}


read -p "Do you want to download Opencv-2.3.0? (Y/N)" DownLoadOpencv
if [ $DownLoadOpencv = "Y" ];
then
	echocolor "now Staring downLoad Opencv2.3.0 ";
	wget http://nchc.dl.sourceforge.net/project/opencvlibrary/opencv-unix/2.3/OpenCV-2.3.0.tar.bz2;
	echocolor "Staring tar OpenCV-2.3.0.tar.bz2 "
	tar -xvf OpenCV-2.3.0.tar.bz2
else
	tar -xvf OpenCV-2.3.0.tar.bz2
	echocolor "Staring tar OpenCV-2.3.0.tar.bz2 "
fi

cd OpenCV-2.3.0
sudo mkdir relese
cd relese

read -p "Please input Dir which you want to install " Dir
sudo cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=$Dir -D BUILD_PYTHON_SUPPORT=ON ..
read -p  "now we will star opencv make&&install  in $Dir .Do you want to continue?( Y/N )  " GoOn
if [ $GoOn = "Y"  ] ;
then
	sudo make 
	sudo make install
else
	exit 0;
fi