Using AWS CodeBuild in Go: A Complete Guide

AWS CodeBuild is a fully managed service from Amazon Web Services (AWS) that enables flexible, scalable continuous integration builds. Using AWS CodeBuild in Go can help your team build and test Go applications more efficiently. This article will provide a complete guide showing you how to use AWS CodeBuild to quickly build pipelines for Go projects.

1. Create an AWS CodeBuild project

Before using AWS CodeBuild, you need to configure the AWS IAM role and create an AWS CodeBuild project in the AWS Management Console. The following are the steps to create an AWS CodeBuild project:

1. Log in to the AWS Management Console, select the AWS CodeBuild service and click "Create project" to create a project;
2. You need to specify the project name, description, and Source code location;
3. Determine the environment for building the project. Compilation of Go language applications requires a special environment configuration, which can be obtained from the AWD CodeBuild Docker image that supports Go;
4. You need to set Trigger to automatically start building the project when code is committed.

2. Compile Go applications in AWS CodeBuild

The process of compiling Go applications in AWS CodeBuild is relatively simple, just follow the following steps:

1. In the build project, build the application by defining build specifications. A build specification is a YAML file that helps you define the properties of the build project, such as images, build processes, environment variables, etc.;
2. During the build process, use AWS CodeBuild to install the Go compiler and specify the application build Go commands that need to be run;
3. After the build is successful, AWS CodeBuild will generate the executable file and archive the build log.

The following is an example of a build specification:

version: 0.2

phases:
install:

runtime-versions:
  go: 1.12.7

build:

commands:
  - go build main.go

In this example, we define the Go language version and compilation command. When running the install command, AWS CodeBuild downloads the Go compiler and installs it.

3. Test Go applications in AWS CodeBuild

After a successful build, AWS CodeBuild can also help you quickly test Go language applications. Here are the steps for testing a Go application:

1. In the build specification, define the application test commands and in the build philosophy specify the test commands;
2. Once completed, AWS CodeBuild will Execute the test commands you defined and output the results to the build log.

The following is an example of testing an application in AWS CodeBuild:

version: 0.2

phases:
install:

runtime-versions:
  go: 1.12.7

build:

commands:
  - go build main.go

test:

commands:
  - go test ./...

In this example, we add a test stage and specify the test command go test ./…. This will run all test code written using Go's built-in test functions.

4. Set up AWS CodeBuild to integrate with Amazon S3

AWS CodeBuild also allows you to store build output files into an Amazon S3 bucket. The following are the steps to integrate AWS CodeBuild with Amazon S3:

1. Create an S3 bucket and set additional access permissions for the AWS CodeBuild role in the bucket's permissions;
2. In the build specification file, specify the application build output files ($CODEBUILD_SRC_DIR is the default build output directory) and push them to the S3 bucket.

The following is a sample build specification to establish AWS CodeBuild integration with Amazon S3:

version: 0.2
output-artifacts:
files:

- '**/*'
artifact-base-directory: $CODEBUILD_SRC_DIR

artifacts:
type: S3
files:

- '**/*'

name: go-app-name-$(date %Y-%m-%d-%H-%M-%S)
namespace-type: none

5. Summary

AWS CodeBuild is a very useful tool that can help you build and test Go language applications. With AWS CodeBuild, you can create build pipelines that are personalized for each commit or change, ensuring that your code meets predetermined standards and quality metrics. The building and testing examples shown in this guide can serve as a starting point for Go applications that you can modify to suit your own needs.

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