non-std-lib

Non-Std-lib

About

This directory has Golang code examples that contain at least one import that is not from the standard library.

Importing from outside Std-lib

Downloading a package

Golang comes with a builtin tool for downloading and installing packages called get.

Common Usage: go get [packages]

• go get github.com/spf13/cobra/cobra
• go get golang.org/x/net/html

go getalso allows you to pass flags such as -u for updating a package that is already installed on your computer.

• go get -u github.com/spf13/cobra/cobra
• go get -u golang.org/x/net/html

For more information about to use go get and the other flags that may be used, see the Golang Documentation.

Remote import paths

Import path names are of the form vcs/path (vcs => Version Control System).

The supported version control systems are:

Bazaar      .bzr
Fossil      .fossil
Git         .git
Mercurial   .hg
Subversion  .svn

When using go get to retrieve a package such as github.com/spf13/cobra/cobra, go get will make a http(s) request for that package.

Given that different vcs have different implementations, go get must know which vcs it is dealing with before it can successfully download the package.

1. If the path name has vcs extension, such as github.com/spf13/cobra/cobra.git, then go get knows to download the package via git.

2. If the path name does not have a vcs extension, such as github.com/spf13/cobra/cobra, then the html page must have a meta of the following form that indicates which vcs was used.

   <meta name="go-import" content="import-prefix vcs repo-root">

   The meta tag for github.com/spf13/cobra/cobra is <meta name="go-import" content="github.com/spf13/cobra git https://github.com/spf13/cobra.git">

For more information on remote import paths, see the Golang Documentation