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golang

    • Go is an opensource programming language developed by Google.
    • Go provides garbage collection, type safety, dynamic-typing capability.
    • Go provides a rich standard library, called as packages (Standard Libraries) - goPackages

    Getting Started

    1. How to install and set up Go
    2. How to set custom goPATH
    3. How to write Go Code
    4. Dependency Management with go modules
    # gopath can be any directory on your system  
Edit your `~/.bash_profile` and add the line: `export GOPATH=$HOME/go`  
source your bash_profile `source ~/.bash_profile`

    # Set the GOBIN path to generate a binary file when go install is executed.
 `export GOBIN=$HOME/go/bin`

    Environment variables

    Command to check environment variables go env

    Workspaces

    Workspace in go is a directory hierarchy with 3 directories at its root

    • src : The src directory contains source code.The path below src determines the import path or executable name.
    • pkg : contains go installed package objects. Each target operating system and architecture pair has its own subdirectory of pkg
      format: pkg/GOOS_GOARCH
      example: pkg/linux_amd64
    • bin : contains executable binaries.

    IDE for golang

    Visual Studio Code
    GoLand

    Getting help with go commands

    go provides extensive command line help by simply using help option as argument, For any help related to go , use

    go help <command>

    examples:

    go help build

    go help install

    go help clean

    go help gopath

    How to build go executables for different architectures

    The go build command allows us to create executables for all golang supported architectures. To build executables for different architectures GOOS and GOARC arguments need to be set accordingly.

    env GOOS=target-OS GOARCH=target-architecture go build <package-import-path>
env GOOS=windows GOARCH=amd64 go build <path_to_go_src>

    To get a complete list of all supported platforms and architectures, use the command : go tool dist list

    sriram@optimus-prime:~$ go tool dist list
android/386
android/amd64
android/arm
android/arm64
darwin/386
darwin/amd64
darwin/arm
darwin/arm64
dragonfly/amd64
freebsd/386
freebsd/amd64
freebsd/arm
linux/386
linux/amd64
linux/arm
linux/arm64
linux/mips
linux/mips64
linux/mips64le
linux/mipsle
linux/ppc64
linux/ppc64le
linux/s390x
nacl/386
nacl/amd64p32
nacl/arm
netbsd/386
netbsd/amd64
netbsd/arm
openbsd/386
openbsd/amd64
openbsd/arm
plan9/386
plan9/amd64
plan9/arm
solaris/amd64
windows/386
windows/amd64

    References

    golang Tutorial
    golang wiki page
    curated list of awesome Go frameworks