If you want to build the newt tool from its source code, follow the following steps:
$ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Alternatively, you can just extract (or git clone) Homebrew and install it to /usr/local.
Go language enviroment dictates a directory structure. Known in Go parlanace as workspace, it must contain three sibling directories with the directory names src, pkg and bin, as explained below.
src contains Go source files organized into packages (one package per directory),
pkg contains package objects, and
bin contains executable commands.
The GOPATH environment variable specifies the location of your workspace. To setup this workspace environment, create a ‘dev’ directory and then a ‘go’ directory under it. Set the GOPATH environment variable to this directory where you will soon clone the newt tool repository.
$ cd $HOME $ mkdir -p dev/go $ cd dev/go $ export GOPATH=`pwd`
(Note that you need to add export statements to ~/.bash_profile to export variables permanently. Don't forget to source the file for the change to go into effect.)
$ vi ~/.bash_profile $ source ~/.bash_profile
$ brew install go ==> ... ... ==> *Summary* 🍺 /usr/local/Cellar/go/1.5.1: 5330 files, 273M
Alternatively, you can download the Go package directly from (https://golang.org/dl/) instead of brewing it. Install it in /usr/local directory.
$ go get mynewt.apache.org/newt/...
$ ls $GOPATH/src/git-wip-us.apache.org/repos/asf/incubator-mynewt-newt.git/newt Godeps README.md coding_style.txt newt.go LICENSE cli design.txt
go install compiles and writes the resulting executable to an output file named newt, which is then installed, along with its dependencies, in $GOPATH/bin.$ cd $GOPATH/src/mynewt.apache.org/newt/newt $ go install $ $ ls "$GOPATH"/bin/ newt newtmgr newtvm
At this point, you can try using newt. For example, check for the version number by typing ‘newt version’. See all the possible commands available to a user of newt by typing ‘newt -h’.
(Note: If you are going to be modifying the newt often and going to be compile the program every time you call it, you will want to store the command in a variable in your .bash_profile. So type in export newt="go run $GOPATH/mynewt.apache.org/newt/newt/newt.go" in your .bash_profile and execute it by calling $newt at the prompt instead of newt. Essentially, $newt calls go run which runs the compiled binary directly without producing an executable. Don't forget to reload the updated bash profile by typing source ~/.bash_profile at the prompt! )
$ newt version Newt version: 1.0 $ newt -h Newt allows you to create your own embedded project based on the Mynewt operating system. Newt provides both build and package management in a single tool, which allows you to compose an embedded workspace, and set of projects, and then build the necessary artifacts from those projects. For more information on the Mynewt operating system, please visit https://www.github.com/mynewt/documentation. Please use the newt help command, and specify the name of the command you want help for, for help on how to use a specific command Usage: newt [flags] newt [command] Examples: newt newt help [<command-name>] For help on <command-name>. If not specified, print this message. Available Commands: version Display the Newt version number. target Set and view target information egg Commands to list and inspect eggs on a nest nest Commands to manage nests & clutches (remote egg repositories) help Help about any command Flags: -h, --help=false: help for newt -l, --loglevel="WARN": Log level, defaults to WARN. -q, --quiet=false: Be quiet; only display error output. -s, --silent=false: Be silent; don't output anything. -v, --verbose=false: Enable verbose output when executing commands. Use "newt help [command]" for more information about a command.