Go未解决的问题
1、同一个环境下，不同项目，只用同一个依赖包的不同版本
2、无法管理对包的特定版本的依赖
解决办法：
在1.5版本之后，在项目下可以添加一个vender目录，查找的顺序
1、在当前包的vender下查找对应的依赖
2、想上级目录查找，直到找到src目录下的vender目录
3、在GOPATH下查找依赖包
4、在GOROOT下查找依赖包
常用的依赖管理工具：godep、glide、dep
安装glide（windows）
使用go get 命令安装glide
$ go get github.com/Masterminds/glide
这个时候开始进行安装，如果无法下载，记得设置下环境变量
GOPROXY=https://goproxy.io
安装之后，glide.exe会被安装在GOPATH的bin文件夹下面
我的环境变量GOPATH=D:\Go; 所以会被安装在D:\Go\bin下面
初始化项目
将路径切换到项目根目录，进行初始化
$ glide.exe init
[INFO] Generating a YAML configuration file and guessing the dependencies
[INFO] Attempting to import from other package managers (use --skip-import to skip)
[INFO] Scanning code to look for dependencies
[INFO] --> Found reference to errors
[INFO] --> Found reference to fmt
[INFO] --> Found reference to sync
[INFO] --> Found reference to unsafe
[INFO] --> Found test reference to Class21
[INFO] --> Found test reference to github.com\easierway\concurrent_map
[INFO] --> Found test reference to math\rand
[INFO] --> Found test reference to os
[INFO] --> Found test reference to strconv
[INFO] --> Found test reference to testing
[INFO] --> Found test reference to time
[INFO] Writing configuration file (glide.yaml)
[INFO] Would you like Glide to help you find ways to improve your glide.yaml configuration?
[INFO] If you want to revisit this step you can use the config-wizard command at any time.
[INFO] Yes (Y) or No (N)?
Y
[INFO] Looking for dependencies to make suggestions on
[INFO] --> Scanning for dependencies not using version ranges
[INFO] --> Scanning for dependencies using commit ids
[INFO] Gathering information on each dependency
[INFO] --> This may take a moment. Especially on a codebase with many dependencies
[INFO] --> Gathering release information for dependencies
[INFO] --> Looking for dependency imports where versions are commit ids
[INFO] Here are some suggestions...
[INFO] The package github.com/easierway/concurrent_map appears to have Semantic Version releases (http://semver.org).
[INFO] The latest release is v1.0.0. You are currently not using a release. Would you like
[INFO] to use this release? Yes (Y) or No (N)
y
[INFO] Would you like to remember the previous decision and apply it to future
[INFO] dependencies? Yes (Y) or No (N)
Y
[INFO] Updating github.com/easierway/concurrent_map to use the release v1.0.0 instead of no release
[INFO] The package github.com/easierway/concurrent_map appears to use semantic versions (http://semver.org).
[INFO] Would you like to track the latest minor or patch releases (major.minor.patch)?
[INFO] The choices are:
[INFO] - Tracking minor version releases would use '>= 1.0.0, < 2.0.0' ('^1.0.0')
[INFO] - Tracking patch version releases would use '>= 1.0.0, < 1.1.0' ('~1.0.0')
[INFO] - Skip using ranges
[INFO] For more information on Glide versions and ranges see https://glide.sh/docs/versions
[INFO] Minor (M), Patch (P), or Skip Ranges (S)?
S
[INFO] Would you like to remember the previous decision and apply it to future
[INFO] dependencies? Yes (Y) or No (N)
N
[INFO] Configuration changes have been made. Would you like to write these
[INFO] changes to your configuration file? Yes (Y) or No (N)
Y
[INFO] Writing updates to configuration file (glide.yaml)
[INFO] You can now edit the glide.yaml file.:
[INFO] --> For more information on versions and ranges see https://glide.sh/docs/versions/
[INFO] --> For details on additional metadata see https://glide.sh/docs/glide.yaml/
初始化之后，会生成一个yml的文件，里面有对应的依赖的信息以及对应的版本
