Initial commit

exercises/12-basic-jenkinsfile/instructions.md

@@ -0,0 +1,17 @@
+# Exercise 12
+
+In this exercise, you'll create a declarative pipeline for a Go-based project. The `Jenkinsfile` will use some of the basic features of the pipeline DSL.
+
+## Writing a Basic Jenkinsfile
+
+1. Create a new GitHub repository named `go-on-jenkins`.
+2. Create a new `Jenkinsfile` in the root directory of the repository as well as a simple `main.go` file. The main function just prints "Hello World!". Initialize the project via Go Modules.
+3. Commit the files and push them to the remote repository.
+4. Set up a new pipeline job for this repository in Jenkins.
+5. Install the [Jenkins Go plugin](https://plugins.jenkins.io/golang).
+6. Configure the latest Go runtime as global tool.
+7. Enhance the `Jenkinsfile` based on the following requirements. The Jenkinsfile should use the declarative syntax.
+    * The job can run on all agents.
+    * The job sets the environment variable `GO111MODULES=on`.
+    * The job uses the Go runtime from the global tool definition.
+    * The job specifies one build stage named "Build". The build stage executes the shell command `go build`.