如何从Gmail下载许多电子邮件附件(How to download many email attachments from gmail)

 [更新：从Go 1.8开始， GOPATH默认为$HOME/go ，但如果您想了解GOPATH布局，自定义等等，您可能仍然会发现这有用） 
 
 官方Go站点讨论了GOPATH以及如何布局工作区目录 。 
 
 export GOPATH="$HOME/your-workspace-dir/" - 在shell中运行它，然后将其添加到~/.bashrc或等效项，以便将来会为您设置。 Go将在src/ ， bin/和pkg/下安装包。 如果您想发布到GitHub，您可以将自己的软件包放在$GOPATH/src之下，如$GOPATH/src/github.com/myusername/ 。 您也可能希望在.bashrc export PATH=$PATH:$GOPATH/bin ，以便您可以在$GOPATH下运行编译的程序。 
 
 或者， 通过Rob Pike ，您还可以设置CDPATH以便在bash中打包export CDPATH=.:$GOPATH/src/github.com:$GOPATH/src/golang.org/x更快： export CDPATH=.:$GOPATH/src/github.com:$GOPATH/src/golang.org/x表示您可以键入cd net/html而不是cd $GOPATH/src/golang.org/x/net/html 。 
 
 Keith Rarick 指出，您可以设置GOPATH=$HOME ，将Go的src/ ， pkg/和bin/目录放在您的homedir下。 这可能很好（例如，您的路径中可能已经有$HOME/bin ），但当然有些人使用多个工作空间等。 

[Update: as of Go 1.8, GOPATH defaults to $HOME/go, but you may still find this useful if you want to understand the GOPATH layout, customize it, etc.]
 
The official Go site discusses GOPATH and how to lay out a workspace directory.
 
export GOPATH="$HOME/your-workspace-dir/" -- run it in your shell, then add it to ~/.bashrc or equivalent so it will be set for you in the future. Go will install packages under src/, bin/, and pkg/, subdirectories there. You'll want to put your own packages somewhere under $GOPATH/src, like $GOPATH/src/github.com/myusername/ if you want to publish to GitHub. You'll also probably want export PATH=$PATH:$GOPATH/bin in your .bashrc so you can run compiled programs under $GOPATH. 
 
Optionally, via Rob Pike, you can also set CDPATH so it's faster to cd to package dirs in bash: export CDPATH=.:$GOPATH/src/github.com:$GOPATH/src/golang.org/x means you can just type cd net/html instead of cd $GOPATH/src/golang.org/x/net/html. 
 
Keith Rarick notes you can set GOPATH=$HOME to put Go's src/, pkg/ and bin/ directories right under your homedir. That can be nice (for instance, you might already have $HOME/bin in your path) but of course some folks use multiple workspaces, etc.