go-swampup-service

This is a simple go program to demonstrate using the modules feature of golang.

Prerequisites:

• Latest golang version with support for go modules (1.12.6)

• Access to internet to clone the github project

• Development machine

Initial Preparation

1. From your browser, open the url https://github.com/jfrogtraining/go-swampup-service and fork the repository and copy the clone url.

2. Change to your working directory and clone using the forked repo url

3. cd go-swampup-service

4. git checkout -b

5. go build -v ./...

6. You can manually run the service by typing ./go-swampup-service

7. Test by running a GET on http://localhost:7888

8. Observe the logs

9. Interrupt the program by typing CTRL-C

Working with Modules

1. Remove any go.mod and go.sum files and ensure GO111MODULE environment variable is set to "on" and set GOPROXY to https://gocenter.io

2. Run go mod init go-swampup-service

3. go mod tidy

4. Edit main.go and uncomment the lines as instructed.

5. Also comment out as instructed.

6 Now test again as before and observe the logs.

7. git add main.go; git add go.mod; git add go.sum

8. git commit -m "go modules test"

9. git push If you see an error indicating there is no upstream set, just execute the command displayed. e.g git push --set-upstream origin

10. Send PR

11 After PR is merged, follow the jenkins pipelines

Conclusions

We imported logrus module from GoCenter and used it in our example. We saw the dependency on logrus module in go.mod