https://github.com/chainguard-dev/hello-world-golang
Simple go application that prints 'hello world' in a loop when built and invoked.
https://github.com/chainguard-dev/hello-world-golang
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Simple go application that prints 'hello world' in a loop when built and invoked.
- Host: GitHub
- URL: https://github.com/chainguard-dev/hello-world-golang
- Owner: chainguard-dev
- License: apache-2.0
- Created: 2024-02-27T10:47:03.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2024-02-27T12:08:09.000Z (over 2 years ago)
- Last Synced: 2025-03-02T12:44:35.066Z (over 1 year ago)
- Topics: no-ghaudit-branch-protections
- Language: Go
- Homepage:
- Size: 17.6 KB
- Stars: 0
- Watchers: 2
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Hello World GoLang
This repository contains a simple Go application that prints "hello world",
along with a randomly generated word continuously every 5 seconds. It serves as
a basic demonstration of Go's capabilities, including concurrency, external
libraries, and logging.
Additionally, this application incorporates a basic cryptographic operation by
leveraging Go's standard crypto/sha256 library to generate a SHA-256 hash of the
randomly generated word in each iteration. Please note that while this
demonstrates cryptographic hashing, Go's standard cryptographic libraries are
not FIPS 140-2 validated.
# Why was this created?
This was created as a example we can use to turn into a melange package, and
later produce a container image using apko.
## Prerequisites
Before you begin, ensure you have Go installed on your system (version 1.15 or
later recommended).
## Cloning the repository
Clone the repository to your local machine to get started with this project:
```bash
git clone https://github.com/chainguard-dev/hello-world-golang.git
cd hello-world-golang
```
## Building the application
o compile the program into a binary, run the following command in the project
directory:
```bash
go build -o hello-world-golang
```
This command compiles the source code into a binary named hello-world-golang.
## Running the application
After building the application, you can run it directly from the command line:
```bash
./hello-world-golang
```
Example output:
```bash
% ./hello-world-golang
INFO[0000] hello world - iteration 1 at 2024-02-27 11:17:13 - random word: Beetleberyl - hash: 5dc4927eacf941b994d5b98eb5451887394e8f2ce2050e05eaa2481faf81661c
INFO[0005] hello world - iteration 2 at 2024-02-27 11:17:18 - random word: Catchertrail - hash: ed35b39871fa62b9f91e9dd11618ff851917a336c771b9157ec108836017202a
INFO[0010] hello world - iteration 3 at 2024-02-27 11:17:23 - random word: Biterbrindle - hash: 0f98eb5e6b046363c42d5bd36a8e6d99dd1e0d08a1d7ea629541ae7de9987cfd
INFO[0015] hello world - iteration 4 at 2024-02-27 11:17:28 - random word: Thumbhail - hash: 5cb5b9dd0327e1eee59305c343459f1cf9cb3dc116ccd0743771a64650690e90
INFO[0020] hello world - iteration 5 at 2024-02-27 11:17:33 - random word: Kittenvivid - hash: 55d50efe20193f12f2e1eb26ba2069fd4422a294364d74489537c8e72ed25234
INFO[0025] hello world - iteration 6 at 2024-02-27 11:17:38 - random word: Duckpeppermint - hash: 19299196b763ffce9afd13280c268aab0a9eae237a2e3c06bac625a21f824f47
INFO[0030] hello world - iteration 7 at 2024-02-27 11:17:43 - random word: Footwool - hash: a3a3fd79f76761091199925cbc19d548fb238897a9eca2f3e9d66d743e658110
```
To validate the version of the application:
```bash
% ./hello-world-golang --version
Hello World GoLang Version: 1.2
```
## Updating dependencies
To update a specific dependency to a new version, you can use the go get command
followed by the dependency path and the desired version. For example, to update
github.com/sirupsen/logrus to version v1.9.0, you would run:
```bash
go get github.com/sirupsen/logrus@v1.9.0
```
Which will update the pinned version in go.mod.