go-wrapper

The easiest way to integrate Go into your project!

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go-wrapper

The easiest way to integrate Go into your project!

Documentation

The Go Wrapper is an easy way to ensure a user has everything necessary to build his GO Application.

Why might this be necessary? Go to date has been very stable for users, is available on most systems or is easy to procure: but with many of the recent changes in Go it will be easier for users to have a fully encapsulated build setup provided by the project. With the Go Wrapper this is very easy to do and it’s a great idea borrowed from Maven and Gradle.

Normally you instruct users to install a specific version of Go, put it on the PATH and then run the go command like the following:

go build

But now, with a Go Wrapper setup, you can instruct users to run wrapper scripts:

./gow build

or on Windows

gow.cmd build

A normal Go build will be executed with the one important change that if the user doesn’t have the necessary version of Go specified in .go/wrapper/go-wrapper.properties or the latest version will be downloaded for the user first, installed and then used.

Subsequent uses of gow/gow.cmd use the previously downloaded, specific version as needed.

Installation

One-line installation in your project directory

curl -L0 https://github.com/furkilic/go-wrapper/releases/latest/download/go-wrapper.tar.gz | tar -xvz -f -

For PowerShell you’ll need to encapsulate the one-line between cmd /c "..."

Supported Systems

The wrapper should work on various operating systems including

  • Linux (numerous versions, tested on Ubuntu and CentOS)
  • OSX / macOS
  • Windows (various newer versions)
  • Solaris (10 and 11)

For all those *nix operating systems, various shells should work including

  • sh
  • bash
  • dash
  • zsh

In terms of Go versions itself, the wrapper should work with any Go version and it defaults to the latest release

Changes

Please check out the changelog for more information about our releases.

Verbose Mode

The wrapper supports a verbose mode in which it outputs further information. It is activated by setting the GOW_VERBOSE environment variable to true.

By default it is off.

Using a Different Version of Go

You can change the version by setting the goVersion in .go/wrapper/go-wrapper.properties, e.g.

goVersion=1.15.1

Using a Specific Distribution

You can set the distribution by setting the distributionUrl in .go/wrapper/go-wrapper.properties, e.g.

distributionUrl=https://dl.google.com/go/go1.13.10.linux-amd64.tar.gz

distributionUrl=https://dl.google.com/go/go1.13.10.windows-amd64.zip

:warning: Be very careful here to download the correct url for windows and linux

Using Basic Authentication for Distribution Download

To download Go from a location that requires Basic Authentication you have 2 options:

  1. Set the environment variables GOW_USERNAME and GOW_PASSWORD

    or

  2. add user and password to the distributionUrl like that: distributionUrl=https://username:password@<yourserver>go1.13.10.linux-amd64.tar.gz

Using a local installation

If you already have a local installation and your GOROOT environment variable points to it, Go Wrapper will use it.

FAQ

Should i use gow or gow.cmd

Only on Windows and the Command Prompt or PowerShell use ./gow.cmd

For all other options (Windows with GitBash or Cygwin, Linux, MacOs..) use ./gow

Nothing is happening when I put an older distributionUrl in .go/wrapper/go-wrapper.properties

First of all ensure that the distributionUrl matches the OS your are working on.

Ensure that there is not an already avalaible GOROOT in your Environment Variables

In case there is a previous Installation with gow, manually delete .go/wrapper/tmp and .go/wrapper/go

Set-Up your environment to use go

Similar to docker-machine env you can set-up your shell to use directly go with the configured Environment Variables. For that purpose you can use ./gow printenv

On Windows

gow printenv
set GOROOT=C:\Users\elonmusk\go-wrapper\.go\wrapper\go
set GOPATH=C:\Users\elonmusk\go-wrapper\.go\wrapper\custom-gopath
set PATH=%GOROOT%\bin;%GOPATH%\bin;%PATH%

# Run this command to configure your shell: copy and paste the above values into your command prompt

Else

$ ./gow printenv
export GOROOT="/home/elonmusk/go-wrapper/.go/wrapper/go"
export GOPATH="/home/elonmusk/go-wrapper/.go/wrapper/custom-gopath"
export PATH="$GOROOT/bin:$GOPATH/bin:$PATH"

# Run this command to configure your shell:
# eval "$(./gow printenv)"