How can I install a package with go get?

by

Command go

Download and install packages and dependencies

Usage:

go get [-d] [-f] [-t] [-u] [-v] [-fix] [-insecure] [build flags] [packages]

Get downloads the packages named by the import paths, along with their
dependencies. It then installs the named packages, like ‘go install’.

The -d flag instructs get to stop after downloading the packages; that
is, it instructs get not to install the packages.

The -f flag, valid only when -u is set, forces get -u not to verify
that each package has been checked out from the source control
repository implied by its import path. This can be useful if the
source is a local fork of the original.

The -fix flag instructs get to run the fix tool on the downloaded
packages before resolving dependencies or building the code.

The -insecure flag permits fetching from repositories and resolving
custom domains using insecure schemes such as HTTP. Use with caution.

The -t flag instructs get to also download the packages required to
build the tests for the specified packages.

The -u flag instructs get to use the network to update the named
packages and their dependencies. By default, get uses the network to
check out missing packages but does not use it to look for updates to
existing packages.

The -v flag enables verbose progress and debug output.

Get also accepts build flags to control the installation. See ‘go help
build’.

When checking out a new package, get creates the target directory
GOPATH/src/. If the GOPATH contains multiple entries, get
uses the first one. For more details see: ‘go help gopath’.

When checking out or updating a package, get looks for a branch or tag
that matches the locally installed version of Go. The most important
rule is that if the local installation is running version “go1”, get
searches for a branch or tag named “go1”. If no such version exists it
retrieves the default branch of the package.

When go get checks out or updates a Git repository, it also updates
any git submodules referenced by the repository.

Get never checks out or updates code stored in vendor directories.

For more about specifying packages, see ‘go help packages’.

For more about how ‘go get’ finds source code to download, see ‘go
help importpath’.

This text describes the behavior of get when using GOPATH to manage
source code and dependencies. If instead the go command is running in
module-aware mode, the details of get’s flags and effects change, as
does ‘go help get’. See ‘go help modules’ and ‘go help module-get’.

See also: go build, go install, go clean.

For example, showing verbose output,

$ go get -v github.com/capotej/groupcache-db-experiment/...
github.com/capotej/groupcache-db-experiment (download)
github.com/golang/groupcache (download)
github.com/golang/protobuf (download)
github.com/capotej/groupcache-db-experiment/api
github.com/capotej/groupcache-db-experiment/client
github.com/capotej/groupcache-db-experiment/slowdb
github.com/golang/groupcache/consistenthash
github.com/golang/protobuf/proto
github.com/golang/groupcache/lru
github.com/capotej/groupcache-db-experiment/dbserver
github.com/capotej/groupcache-db-experiment/cli
github.com/golang/groupcache/singleflight
github.com/golang/groupcache/groupcachepb
github.com/golang/groupcache
github.com/capotej/groupcache-db-experiment/frontend
$

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